Omaha/Valley, NE

Weather Forecast Office

Severe Weather and Flooding on May 20 and 21, 2024

Overview

From the evening of May 20th through mid afternoon on May 21st, several waves of thunderstorms produced tornadoes, damaging winds with gusts up to 90 mph, hail up to tennis-ball size, and extremely heavy rainfall, which resulted in considerable flash flooding and river flooding.

Six tornadoes (5 EF0 and 1 EF1) occurred with a fast-moving line of thunderstorms that moved through eastern Nebraska and southwest Iowa during the early morning hours on the 21st. An additional 4 tornadoes occurred with a second round of thunderstorms (supercells) that formed over far eastern Nebraska and tracked through southwest Iowa during the late morning and early afternoon hours on the 21st.

Radar loop from 4 PM on May 20th through 3 PM on May 21st

Tornado
Flooding
Storm Reports
Rainfall
Environment
Additional Information

Tornadoes

Tornado - Richland, NE Area
COLFAX COUNTY

Date	5/21/2024
Time (Local)	5:14 - 5:14 AM
EF Rating	EF0
Est. Peak Winds	82 mph
Path Length	0.51 miles
Max Width	50 yards
Injuries/Deaths	0/0
Summary: A brief tornado touchdown overturned many center pivots, tore roofs off 3 hog barns and produced extensive tree damage across southern Colfax County.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.	Tornado damage 4.75 miles northeast of Richland, NE. NWS damage survey.	Tornado damage 5.06 miles northeast of Richland. NWS damage survey.

Tornado - Brainard, NE Area #1
BUTLER COUNTY

Date	5/21/2024
Time (Local)	5:20 - 5:20 AM
EF Rating	EF0
Est. Peak Winds	84 mph
Path Length	0.62 miles
Max Width	50 yards
Injuries/Deaths	0/0
Summary: A brief tornado touchdown produced minor tree damage.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.

Tornado - Brainard, NE Area #2
BUTLER COUNTY

Date	5/21/2024
Time (Local)	5:26 - 5:28 AM
EF Rating	EF0
Est. Peak Winds	80 mph
Path Length	2.04 miles
Max Width	50 yards
Injuries/Deaths	0/0
Summary: A brief tornado touchdown produced minor tree damage.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.	Tornado damage 2.66 miles southeast of Brainard, NE. NWS damage survey.

Tornado - Valley View
SAUNDERS COUNTY

Date	5/21/2024
Time (Local)	5:45 - 5:45 AM
EF Rating	EF0
Est. Peak Winds	84 mph
Path Length	0.39 miles
Max Width	50 yards
Injuries/Deaths	0/0
Summary: A brief tornado touchdown produced substantial tree damage across much of the Valley View Golf Course as well as at a few homes in Valley View Estates.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.

Tornado - Coburg, IA Area
MONTGOMERY COUNTY

Date	5/21/2024
Time (Local)	7:10 - 7:11 AM
EF Rating	EF0
Est. Peak Winds	75 mph
Path Length	0.69 miles
Max Width	40 yards
Injuries/Deaths	0/0
Summary: Emergency management drone imagery showed evidence of a short-lived tornado track through fields in this area, damaging trees along a fence line and near a home.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.

Tornado - Hepburn, IA Area
PAGE COUNTY

Date	5/21/2024
Time (Local)	7:32 - 7:36 AM
EF Rating	EF1
Est. Peak Winds	100 mph
Path Length	3.27 miles
Max Width	80 yards
Injuries/Deaths	0/0
Summary: A short-lived tornado developed near 170th street west of N avenue and moved east northeast.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.	Tornado damage 5.61 miles northwest of Clarinda. NWS damage survey.	Tornado damage 5.61 miles northwest of Clarinda. NWS damage survey.

Tornado - Yutan, NE
SAUNDERS COUNTY

Date	5/21/2024
Time (Local)	12:52 - 12:52 PM
EF Rating	EF0
Est. Peak Winds	80 mph
Path Length	0.22 miles
Max Width	50 yards
Injuries/Deaths	0/0
Summary: A brief tornado touchdown on the north side of Yutan produced spotty tree damage and damaged a residential fence.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.

Tornado - Red Oak, IA
MONTGOMERY COUNTY

Date	5/21/2024
Time (Local)	2:35 - 2:40 PM
EF Rating	EF1
Est. Peak Winds	107 mph
Path Length	2.95 miles
Max Width	70
Injuries/Deaths	0/0
Summary: A tornado developed near Evergreen Avenue and tracked over open fields toward the northeast before dissipating just prior to Broadway street in Red Oak.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.	Tornado damage on the west side of Red Oak, IA. NWS damage survey.	Tornado damage on the west side of Red Oak, IA. NWS damage survey.

Tornado - Villisca-Carbon, IA
ADAMS COUNTY

Date	5/21/2024
Time (Local)	2:43 - 3:19 PM
EF Rating	EF3 (EF2 in NWS Omaha area of responsibility)
Est. Peak Winds	140-150 mph
Path Length	32.01 miles
Max Width	1300 yards
Injuries/Deaths	0/0
Summary: A tornado touched down in north-central Page County and tracked through southeast Montgomery County, northwest of Villisca, IA before moving into Adams County. The tornado produced EF-2 damage in Montgomery County, and up to EF-3 damage in Adams County.

Track Map

Downloadable KMZ File


Base reflectivity and storm-relative velocity radar data at the time of the tornado.

Tornado - Nodaway-Corning-Greenfield, IA
PAGE to ADAIR COUNTY

Date	5/21/2024
Time (Local)	2:57 - 3:43 PM
EF Rating	EF4 (EF1 in NWS Omaha area of responsibility)
Est. Peak Winds	180 mph
Path Length	43.98 miles
Max Width	1000 yards
Injuries/Deaths	35/5
Summary: A tornado touched down south of Villisca, IA in the NWS Omaha area of responsibility, producing EF1 damage. The tornado intensified as it tracked northeast into the NWS Des Moines are of responsibility where it produced up to EF-4 damage, eventually dissipating northeast of Greenfield, IA.

Track Map

Downloadable KMZ File


Caption

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Flooding

Heavy rainfall led to flooding on some area rivers and creeks.

Hydrographs


Missouri River at Plattsmouth	Missouri River at Nebraska City	Missouri River at Brownville	Missouri River at Rulo

Big Papillion Creek at Fort Street	Papillion Creek at Fort Crook	Wahoo Creek at Ithaca	Wahoo Creek at Ashland

Storm Reports

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     Tstm Wnd Gst     3 SSE Valparaiso        41.04N 96.81W
05/20/2024  M54 MPH          Lancaster          NE   Public           

            from personal weather station. 

0845 PM     Hail             1 N Bloomfield          42.62N 97.65W
05/20/2024  E1.25 Inch       Knox               NE   Trained Spotter  

             

0909 PM     Hail             Crofton                 42.73N 97.50W
05/20/2024  M1.75 Inch       Knox               NE   Public           

            Quarter to Golf ball sized hail. 

0925 PM     Hail             Fordyce                 42.70N 97.36W
05/20/2024  M1.25 Inch       Cedar              NE   911 Call Center  

             

0928 PM     Hail             2 NW Weston             41.21N 96.76W
05/20/2024  M1.75 Inch       Saunders           NE   Public           

             

0930 PM     Hail             2 NW Hartington         42.64N 97.29W
05/20/2024  E1.75 Inch       Cedar              NE   911 Call Center  

             

0941 PM     Hail             1 S Malmo               41.25N 96.72W
05/20/2024  M1.00 Inch       Saunders           NE   Public           

             

0941 PM     Hail             1 NNE Harlan            41.66N 95.32W
05/20/2024  M1.00 Inch       Shelby             IA   Public           

             

0949 PM     Hail             3 N Harlan              41.69N 95.33W
05/20/2024  E2.00 Inch       Shelby             IA   911 Call Center  

             

1007 PM     Tstm Wnd Gst     2 NNW Decatur           42.03N 96.26W
05/20/2024  E65 MPH          Burt               NE   Emergency Mngr   

             

1026 PM     Hail             Valparaiso              41.08N 96.83W
05/20/2024  E1.25 Inch       Saunders           NE   Public           

            Report from mPING: Half Dollar (1.25 in.). 

1046 PM     Hail             2 S Wahoo               41.19N 96.62W
05/20/2024  M0.25 Inch       Saunders           NE   Public           

             

1115 PM     Tstm Wnd Gst     4 NE Bennington         41.42N 96.11W
05/20/2024  M69 MPH          Washington         NE   ASOS             

             

1120 PM     Rain             2 S Wahoo               41.19N 96.62W
05/20/2024  M2.82 Inch       Saunders           NE   Public           

            Corrects previous flash flood report from 2 
            S Wahoo. 2.82 inches of rain. 

1138 PM     Flash Flood      3 NW Boys Town          41.28N 96.18W
05/20/2024                   Douglas            NE   Public           

            180th St just south of W Maple Rd completely 
            submerged, passage by vehicle is difficult. 

1154 PM     Flash Flood      1 SE Elkhorn            41.27N 96.23W
05/20/2024                   Douglas            NE   Trained Spotter  

            Low lying roadways are water-covered . Water 
            is not up to the top of the gutters, but 
            some vehicles are having difficulty driving 
            through. 

1218 AM     Flash Flood      Boys Town               41.26N 96.14W
05/21/2024                   Douglas            NE   Dept of Highways 

            Ponding reported on eastbound Dodge Street 
            at 144th. 

1239 AM     Rain             4 SE Bennington         41.32N 96.11W
05/21/2024  M2.58 Inch       Douglas            NE   Mesonet          

            Mesonet station CW8198 Bennington. 

1250 AM     Hail             2 N Minden              41.50N 95.54W
05/21/2024  M1.00 Inch       Pottawattamie      IA   Trained Spotter  

             

1252 AM     Funnel Cloud     3 SW Harlan             41.62N 95.37W
05/21/2024                   Shelby             IA   Public           

            Funnel Cloud 3 SW of Harlan near 900th and 
            Juniper Rd. 

0116 AM     Flash Flood      5 NE Omaha              41.32N 95.94W
05/21/2024                   Douglas            NE   Public           

            2 cars stuck in the water. 

0421 AM     Rain             Fremont                 41.45N 96.49W
05/21/2024  M4.69 Inch       Dodge              NE   Public           

            Several reports for heavy rainfall. Amounts 
            vary from 3.03 inches to 4.69 inches. 

0454 AM     Flash Flood      Fremont                 41.44N 96.49W
05/21/2024                   Dodge              NE   Public           

            Fast flowing water over East 11st Street. 

0505 AM     Tstm Wnd Gst     2 NE Columbus           41.46N 97.33W
05/21/2024  M90 MPH          Platte             NE   Emergency Mngr   

            Multiple power poles snapped off on the 
            northeast side of Columbus. Tree damage 
            around Columbus as well. 

0514 AM     Tstm Wnd Dmg     1 ENE Richland          41.44N 97.20W
05/21/2024                   Colfax             NE   Emergency Mngr   

            Numerous outbuildings have roofs off 
            including a machine shed and 2 hog units. 
            Numerous overturned pivots. Time based on 
            radar. 

0525 AM     Tstm Wnd Dmg     3 SE Brainard           41.15N 96.96W
05/21/2024                   Butler             NE   Trained Spotter  

            several tree tops snapped. Also 4.50 
            rainfall. Time estimated from radar. 

0530 AM     Hail             3 SW Bennington         41.33N 96.17W
05/21/2024  E1.75 Inch       Douglas            NE   Public           

            Report from mPING of golfball sized hail 3 
            miles south-southwest of Bennington. 

0530 AM     Hail             4 NE Elkhorn            41.31N 96.18W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

            Report from mPING of quarter sized hail 4 
            miles northeast of Elkhorn. 

0530 AM     Tstm Wnd Gst     Howells                 41.72N 97.00W
05/21/2024  M79 MPH          Colfax             NE   Trained Spotter  

             

0533 AM     Hail             1 NW Bennington         41.37N 96.17W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

            Report from mPING of quarter sized hail on 
            the northwest side of Bennington. 

0533 AM     Tstm Wnd Dmg     1 S Snyder              41.68N 96.79W
05/21/2024                   Dodge              NE   Emergency Mngr   

            6 power poles down. Time based on radar. 

0536 AM     Hail             3 WNW Boys Town         41.28N 96.18W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

             

0536 AM     Hail             3 SE Bennington         41.33N 96.14W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

            Report from mPING of quarter sized hail 
            southeast of Bennington. 

0537 AM     Hail             Bennington              41.37N 96.15W
05/21/2024  M1.50 Inch       Douglas            NE   Public           

             

0539 AM     Tstm Wnd Dmg     1 NW Winside            42.19N 97.19W
05/21/2024                   Wayne              NE   Emergency Mngr   

            Numerous outbuildings damaged. Trees 
            uprooted and powerlines down. Time based on 
            radar. 

0540 AM     Hail             2 SE Elkhorn            41.26N 96.21W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

             

0542 AM     Hail             3 SSW Bennington        41.32N 96.18W
05/21/2024  E1.25 Inch       Douglas            NE   Public           

             

0545 AM     Tstm Wnd Dmg     1 SSW Inglewood         41.40N 96.51W
05/21/2024                   Saunders           NE   NWS Employee     

            Numerous large trees down across Valley View 
            Estates and Valley View Golf Course. Delayed 
            report. 

0602 AM     Hail             2 W Omaha               41.26N 96.05W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

             

0606 AM     Hail             3 N Council Bluffs      41.28N 95.86W
05/21/2024  E1.75 Inch       Pottawattamie      IA   Amateur Radio    

             

0607 AM     Tstm Wnd Gst     3 ESE Tekamah           41.76N 96.18W
05/21/2024  M62 MPH          Burt               NE   ASOS             

             

0612 AM     Hail             2 N Council Bluffs      41.27N 95.87W
05/21/2024  E1.25 Inch       Pottawattamie      IA   Public           

             

0615 AM     Rain             2 NW Valley             41.34N 96.37W
05/21/2024  M4.78 Inch       Douglas            NE   Amateur Radio    

             

0619 AM     Tstm Wnd Gst     1 WSW Omaha             41.26N 96.02W
05/21/2024  M60 MPH          Douglas            NE   Broadcast Media  

             

0623 AM     Flash Flood      2 NNE Boys Town         41.29N 96.12W
05/21/2024                   Douglas            NE   Public           

             

0624 AM     Hail             1 WSW Omaha             41.26N 96.02W
05/21/2024  M1.00 Inch       Douglas            NE   Broadcast Media  

             

0625 AM     Flash Flood      2 SE Boys Town          41.23N 96.10W
05/21/2024                   Douglas            NE   Public           

            Water over the road. 

0639 AM     Rain             1 W Omaha               41.26N 96.02W
05/21/2024  M3.00 Inch       Douglas            NE   Broadcast Media  

            3 inches of rain in 45 minutes at 72nd and 
            Dodge. 

0654 AM     Rain             Bennington              41.36N 96.15W
05/21/2024  M6.17 Inch       Douglas            NE   NWS Employee     

             

0700 AM     Flash Flood      1 SE Leshara            41.32N 96.42W
05/21/2024                   Saunders           NE   Emergency Mngr   

            6 homes flooded. 4 homes evacuated. Time 
            estimated from early morning thunderstorms. 

0702 AM     Flash Flood      1 NNW Mead              41.25N 96.50W
05/21/2024                   Saunders           NE   NWS Employee     

            Water flowing over Highway 77. 

0707 AM     Rain             4 NNE Boys Town         41.31N 96.11W
05/21/2024  M5.18 Inch       Douglas            NE   NWS Employee     

            quarter size hail from earlier. 

0712 AM     Flash Flood      Minden                  41.47N 95.54W
05/21/2024                   Pottawattamie      IA   Emergency Mngr   

            Street flooding in Minden. Sewer system 
            completely inundated and water over roads at 
            340th St between southeast Minden and Keg 
            Creek Bridge area. 

0721 AM     Rain             3 ENE Omaha             41.28N 95.96W
05/21/2024  M4.37 Inch       Douglas            NE   NWS Employee     

            35th and Charles. 

0742 AM     Flash Flood      Bruno                   41.28N 96.95W
05/21/2024                   Butler             NE   Emergency Mngr   

            Many roads underwater, especially in the 
            Skull Creek area. 

0757 AM     Rain             2 WNW Omaha             41.28N 96.04W
05/21/2024  M6.37 Inch       Douglas            NE   Public           

             

0834 AM     Flood            2 S Omaha               41.24N 96.01W
05/21/2024                   Douglas            NE   Broadcast Media  

            Media reports flooding with multiple stalled 
            vehicles at Center and 67th Street. 

1215 PM     Hail             Malmo                   41.27N 96.72W
05/21/2024  M1.25 Inch       Saunders           NE   Public           

             

1221 PM     Hail             1 N Colon               41.31N 96.60W
05/21/2024  M1.00 Inch       Saunders           NE   Public           

            Report from mPING: Quarter (1.00 in.). 

1229 PM     Hail             1 SSW Inglewood         41.40N 96.51W
05/21/2024  M1.75 Inch       Saunders           NE   NWS Employee     

             

1231 PM     Hail             2 W Inglewood           41.41N 96.54W
05/21/2024  E1.75 Inch       Saunders           NE   Public           

            Report from mPING: Golf Ball (1.75 in.). 

1232 PM     Hail             1 NNW Fremont           41.45N 96.50W
05/21/2024  E1.75 Inch       Dodge              NE   Public           

             

1234 PM     Hail             1 NW Fremont            41.45N 96.50W
05/21/2024  E1.75 Inch       Dodge              NE   Public           

            Report from mPING: Golf Ball (1.75 in.). 

1239 PM     Hail             Fremont                 41.44N 96.49W
05/21/2024  E1.75 Inch       Dodge              NE   Public           

            Report from mPING: Golf Ball (1.75 in.). 

1240 PM     Tstm Wnd Gst     1 NNW Fremont           41.45N 96.50W
05/21/2024  E65 MPH          Dodge              NE   Trained Spotter  

             

1244 PM     Hail             2 NW Fremont            41.45N 96.52W
05/21/2024  E1.75 Inch       Dodge              NE   Public           

            Report from mPING: Golf Ball (1.75 in.). 

1257 PM     Funnel Cloud     3 E Yutan               41.25N 96.33W
05/21/2024                   Douglas            NE   Law Enforcement  

            Video confirms funnel cloud did not touch 
            down. 

0115 PM     Flash Flood      4 N Valley              41.37N 96.35W
05/21/2024                   Douglas            NE   Law Enforcement  

            276th street closed north of Valley from 
            Highway 275 to Highway 36. Highway 36 is 
            closed at the intersection of 276th street. 

0125 PM     Hail             Syracuse                40.66N 96.19W
05/21/2024  E1.25 Inch       Otoe               NE   Public           

            Report from mPING: Half Dollar (1.25 in.). 

0128 PM     Hail             Blencoe                 41.93N 96.09W
05/21/2024  E1.00 Inch       Monona             IA   Public           

            Report from mPING: Quarter (1.00 in.). 

0130 PM     Hail             2 W Ralston             41.21N 96.08W
05/21/2024  E1.00 Inch       Douglas            NE   Public           

            Report from mPING: Quarter (1.00 in.). 

0135 PM     Tstm Wnd Dmg     La Vista                41.18N 96.04W
05/21/2024                   Sarpy              NE   Public           

            Report from mPING: 1-inch tree limbs broken; 
            Shingles blown off. 

0137 PM     Tstm Wnd Dmg     5 E Bennington          41.37N 96.06W
05/21/2024                   Douglas            NE   Public           

            Trees reported down. 

0138 PM     Hail             3 SSW Nehawka           40.80N 96.02W
05/21/2024  E2.50 Inch       Cass               NE   Trained Spotter  

            Emergency Manager relayed a report from a 
            trained spotter of tennis ball sized hail at 
            67th and A street. 

0143 PM     Funnel Cloud     2 NE Union              40.83N 95.89W
05/21/2024                   Cass               NE   Trained Spotter  

            Trained Spotter reported a funnel cloud to 
            the west of Thurman. Funnel has since gone 
            up but strong rotation persists. 

0212 PM     Hail             Imogene                 40.87N 95.43W
05/21/2024  M1.00 Inch       Fremont            IA   Public           

            Report from mPING: Quarter (1.00 in.). 

0216 PM     Hail             2 NE Emerson            41.03N 95.38W
05/21/2024  E1.00 Inch       Montgomery         IA   Public           

            Report from mPING: Quarter (1.00 in.). 

0216 PM     Funnel Cloud     3 SSE Imogene           40.84N 95.42W
05/21/2024                   Fremont            IA   Broadcast Media  

            Funnel cloud reported by broadcast media 
            extending halfway to the ground. This was 
            just south of Imogene. 

0225 PM     Funnel Cloud     3 ENE Imogene           40.89N 95.37W
05/21/2024                   Page               IA   Trained Spotter  

            Trained spotter reported a funnel cloud and 
            rotation in the far northwest corner of Page 
            County. 

0232 PM     Hail             4 W Red Oak             41.03N 95.31W
05/21/2024  M1.25 Inch       Montgomery         IA   Public           

            Report from mPING: Half Dollar (1.25 in.). 

0233 PM     Funnel Cloud     5 ESE Emerson           40.98N 95.32W
05/21/2024                   Montgomery         IA   Emergency Mngr   

            Emergency Manager reported another funnel 
            developing to the southwest of Red Oak. 

0237 PM     Tornado          2 W Red Oak             41.01N 95.27W
05/21/2024                   Montgomery         IA   Emergency Mngr   

            Tornado on the ground near the Red Oak 
            airport. Reported by the Emergency Manager. 

0248 PM     Funnel Cloud     4 W Hepburn             40.85N 95.09W
05/21/2024                   Page               IA   Broadcast Media  

            Media reported large funnel 4 miles west of 
            Hepburn. 

0300 PM     Tornado          3 N Villisca            40.98N 94.97W
05/21/2024                   Montgomery         IA   Broadcast Media  

            Live video of a confirmed tornado crossing 
            Highway 34 just east of Highway 71. 


&&

Rain Reports

During the nighttime hours of May 20th into the morning hours of the 21st, a swath of heavy rain fell from Butler County east-northeast through Saunders, Dodge, Washington, Douglas, Harrison, Pottawattamie, and Shelby Counties. Rainfall in excess of 6-7" was measured at several locations, leading to flash flooding and some river and creek flooding.

...48-HOUR PRECIPITATION REPORTS...

Location                     Amount    Time/Date       Provider

...Iowa...

...Fremont County...
0.8 W Randolph               0.69 in   0200 AM 05/22   HADS

...Harrison County...
5 WNW Persia                 5.04 in   0931 PM 05/21
Desoto                       4.60 in   0145 AM 05/22   RAWS
Loess Hills State Forest     3.43 in   0111 AM 05/22   RAWS
Logan                        2.44 in   0200 AM 05/22   HADS
Pisgah                       1.65 in   0200 AM 05/22   HADS

...Mills County...
1 S Malvern                  1.25 in   0700 AM 05/21

...Monona County...
2 SSW Blencoe                2.66 in   0200 AM 05/22   AWS
4.1 SW Turin                 1.62 in   0200 AM 05/22   HADS
3.9 S Turin                  1.36 in   0200 AM 05/22   HADS
CASTANA                      1.22 in   0155 AM 05/22   CWOP
ONAWA                        1.14 in   0155 AM 05/22   CWOP
1.2 SW Mapleton              1.05 in   0200 AM 05/22   HADS
Decatur                      0.58 in   0200 AM 05/22   HADS

...Montgomery County...
6 NE Emerson                 1.78 in   0200 AM 05/22   AWS
0.9 W Red Oak                1.34 in   0200 AM 05/22   HADS
2 NNW Coburg                 1.20 in   0155 AM 05/22   AWS

...Page County...
3.0 E Clarinda               0.55 in   0145 AM 05/22   HADS

...Pottawattamie County...
2 NE Council Bluffs          3.98 in   0200 AM 05/22   AWS
Carter Lake                  3.05 in   0200 AM 05/22   CWOP
Underwood                    2.47 in   0200 AM 05/22   CWOP
Loess Hills Hitchcock        2.30 in   0111 AM 05/22   RAWS

...Nebraska...

...Antelope County...
Ewing 5ESE                   1.46 in   0200 AM 05/22   CWOP
Neligh                       0.86 in   0135 AM 05/22   CWOP

...Boone County...
6 NNE Belgrade               0.79 in   0200 AM 05/22   AWS
Cedar Rapids                 0.72 in   0158 AM 05/22   CWOP
Albion Airport               0.69 in   0155 AM 05/22   AWOS

...Burt County...
Tekamah Airport              3.89 in   0154 AM 05/22   ASOS

...Cass County...
Plattsmouth                  1.31 in   0200 AM 05/22   CWOP
Plattsmouth                  0.84 in   0156 AM 05/22   CWOP
Plattsmouth Airport          0.55 in   0155 AM 05/22   AWOS

...Cedar County...
3 NE Randolph                1.14 in   0200 AM 05/22   AWS

...Dodge County...
1 N Fremont                  6.22 in   0726 AM 05/21
Fremont Airport              5.65 in   0155 AM 05/22   AWOS
Fremont                      4.69 in   0421 AM 05/21   Public

...Douglas County...
1.6 NW Bennington            7.48 in   0200 AM 05/22   HADS
Omaha 2.5 W                  6.86 in   0530 PM 05/21   COCORAHS
2 WNW Omaha                  6.37 in   0757 AM 05/21   Public
Bennington                   6.17 in   0654 AM 05/21   NWS Employee
1.7 N Chalco                 5.32 in   0200 AM 05/22   HADS
3 SE Bennington              5.19 in   0200 AM 05/22   AWS
4 NNE Boys Town              5.18 in   0707 AM 05/21   NWS Employee
1 SSE Elkhorn                5.15 in   1006 PM 05/21
3 ENE Elkhorn                5.00 in   0740 AM 05/21
1 E Omaha                    4.93 in   0700 AM 05/21
2 NW Valley                  4.78 in   0615 AM 05/21   Amateur Radio
3.7 NW Omaha                 4.68 in   0150 AM 05/22   HADS
3 ENE Omaha                  4.37 in   0721 AM 05/21   NWS Employee
1.1 E Ralston                4.16 in   0200 AM 05/22   ALERT
2 SSE Omaha                  3.92 in   0734 PM 05/21
Omaha                        3.59 in   0156 AM 05/22   CWOP
Valley 1 WNW                 3.55 in   1200 AM 05/22   COOP
3.6 NE Boys Town             3.36 in   0120 AM 05/22   HADS
4 SE Bennington              3.26 in   0710 AM 05/21
Millard                      3.16 in   0200 AM 05/22   AWS
0.8 SE Boys Town             3.08 in   0145 AM 05/22   HADS
1.4 SW Omaha                 3.04 in   0145 AM 05/22   HADS
1 W Omaha                    3.00 in   0639 AM 05/21   Broadcast Media
2.8 E Boys Town              3.00 in   0135 AM 05/22   ALERT
3.9 N Boys Town              2.87 in   0115 AM 05/22   HADS
Omaha                        2.75 in   0200 AM 05/22   CWOP
Bennington                   2.71 in   0145 AM 05/22   CWOP
Omaha Eppley Airfield        2.66 in   0152 AM 05/22   ASOS
2.1 S Carter Lake            2.52 in   0200 AM 05/22   HADS
2.1 W Boys Town              2.20 in   0150 AM 05/22   HADS
Omaha                        2.15 in   0200 AM 05/22   CWOP
3.1 E Ralston                2.12 in   0125 AM 05/22   HADS
Millard Airport              1.72 in   0155 AM 05/22   AWOS
0.9 N Millard                0.70 in   0115 AM 05/22   HADS
1.5 NW Omaha                 0.68 in   0105 AM 05/22   HADS

...Madison County...
Norfolk                      0.60 in   0200 AM 05/22   CWOP
Norfolk Airport              0.52 in   0156 AM 05/22   ASOS

...Platte County...
2.5 NE Columbus              2.00 in   1200 AM 05/22   COOP
Columbus                     1.42 in   0157 AM 05/22   CWOP
Duncan                       1.28 in   0200 AM 05/22   CWOP
Columbus                     0.58 in   0145 AM 05/22   CWOP

...Sarpy County...
Bellevue                     2.20 in   0155 AM 05/22   CWOP
La Vista                     2.17 in   0153 AM 05/22   CWOP
1.1 W Offutt Afb             1.64 in   0120 AM 05/22   HADS
1.1 SW Chalco                1.61 in   0115 AM 05/22   HADS
Springfield                  0.58 in   0145 AM 05/22   CWOP

...Saunders County...
1 S Wahoo                    5.90 in   0756 AM 05/21
Wahoo                        2.55 in   0155 AM 05/22   AWOS
ASHLAND                      1.40 in   0156 AM 05/22   CWOP
3 SSE Mead                   1.09 in   0200 AM 05/22   AWS
Valparaiso 6NW               0.58 in   0200 AM 05/22   NE-MESO

...Seward County...
Utica                        0.98 in   0200 AM 05/22   AWS

...Stanton County...
STANTON                      0.95 in   0200 AM 05/22   CWOP

...Washington County...
1.7 SE Kennard               7.88 in   0200 AM 05/22   ALERT
Blair 6.3 S                  6.28 in   0254 PM 05/21   COCORAHS
5.1 W Blair                  3.92 in   0110 AM 05/22   HADS
Missouri River               3.41 in   0200 AM 05/22   HADS
Blair                        3.40 in   0200 AM 05/22   CWOP
Blair Muni                   3.28 in   0155 AM 05/22   AWOS
2.4 N Kennard                2.91 in   0115 AM 05/22   HADS

Environment

Insert synoptic summary.


Figure 1: 300-mb analysis at 7 AM on May 21st	Figure 2: 500-mb analysis at 7 AM on May 21st	Figure 3: Surface analysis at 7 AM on May 21st

Near-storm environment summary.


Figure 4: Observed sounding at Valley, NE at 11 AM on May 21st.	Figure 5: Significant tornado parameter (effective layer) at 2 PM on May 21st.

Additional Information

The Forecast


SPC Day 7 Probabilistic Outlook	SPC Day 6 Probabilistic Outlook


SPC Day 5 Probabilistic Outlook	SPC Day 4 Probabilistic Outlook


SPC Day 3 Categorical Outlook	SPC Day 3 Probabilistic Outlook


SPC Day 2 Categorical Outlook	SPC Day 2 Tornado Outlook	SPC Day 2 Hail Outlook	SPC Day 2 Wind Outlook

SPC Day 1 Categorical Outlook	SPC Day 1 Tornado Outlook	SPC Day 1 Hail Outlook	SPC Day 1 Wind Outlook

Summaries from other NWS Offices

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Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

Severe Weather and Flooding on May 20 and 21, 2024