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Flood Threat For Several Locations Today

The active monsoon season will continue the rest of the week and the flood threat today stretches from the Arizona to portions of the Intermountain West. Meanwhile, a humid and moist air mass ahead of a cold front may result in heavy rain and flooding from the Mid-Atlantic to the eastern Ohio and Tennessee Valleys. Finally, slow moving storms may produce flooding for the central Gulf Coast states. Read More >

Overview

Severe thunderstorms developed in Montana during the evening of July 4th, then moved into northwestern South Dakota during the early morning hours of July 5th.  The storms intensified around daybreak on July 5th, as they encountered a more favorable environment for severe storms. The storms started out as supercells and then evolved into a derecho, with embedded supercells at times, as it moved through Hand and Hyde counties. The significant severe storms tracked southeast across central South Dakota, into southeastern South Dakota, and eventually into northern Iowa, while producing winds up to 91 mph and hail to the size of softballs in central South Dakota. This led to widespread damage to trees, grain bins, crops, and vehicles in the path of the storms. 

A derecho is a widespread, long-lived wind storm that produces wind damage for at least 400 miles and is at least 60 miles wide.  The wind gusts produced by a derecho must be at least 58 mph for most of its length, along with several 75 mph or great gusts.  For more information about derechos, check out this webpage from the Storm Prediction Center

Storm Reports received on July 5th.
Storm Reports received on July 5th.  
MRMS Maximum Estimated Hail Size - Central South Dakota Promise, SD - Softball Sized Hail.  Photo from Sara Mowrer Convective Warnings that were issued during the event - Image created by NWS Sioux Falls, SD
MODIS Satellite imagery from before and after the storm, showing a scattering of hail scarring across the countryside. Promise, SD - Softball Sized Hail - Photo from Sara Mowrer Convective Warnings that were issued during the event - Image created by NWS Sioux Falls, SD

Radar

Radar Loop from July 5th, 2022

 

Additional Radar Images

Radar Image of the storm as it was producing 4" hail in Promise, SD. Radar Image of the storm as it was producing a 91 mph wind gust to the north of Agar, SD.  The left panel is the radar reflectivity and the right panel is the velocity. Radar Image as the storm was moving through Highmore. A 78 mph wind gusts was reported via the SD Mesonet and a roof was blown off a home. 12:39 PM CDT radar Image as the storm was approaching Miller, SD.  The storm produced 87 mph winds in Ree Heights and tree damage through Miller, SD. Reflectivity is in the left panel and velocity in the right.
9:13 PM MDT radar Image of the storm as it was producing 4" hail in Promise, SD. The left panel is reflectivity and the right is the radar estimate of hail size.  11:25 PM CDT radar Image of the storm as it was producing a 91 mph wind gust to the north of Agar, SD.  The left panel is the radar reflectivity and the right panel is the velocity.  12:14 PM CDT radar Image as the storm was moving through Highmore. A 78 mph wind gusts was reported via the SD Mesonet and a roof was blown off a home.  12:39 PM CDT radar Image as the storm was approaching Miller, SD.  The storm produced 87 mph winds in Ree Heights and tree damage through Miller, SD. Reflectivity is in the left panel and velocity in the right. 

Storm Reports

Below is a listing of storm reports. Find an interactive map of this same information from the SPC here. 

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ABERDEEN SD
824 PM CDT TUE JUL 5 2022

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

0905 AM     TSTM WND DMG     6 NNW ISABEL            45.48N 101.48W
07/05/2022                   CORSON             SD   PUBLIC           

            MANY TREES UPROOTED. 

0910 AM     TSTM WND DMG     6 N ISABEL              45.48N 101.43W
07/05/2022                   CORSON             SD   PUBLIC           

            DAMAGE PICTURE RELAYED VIA SOCIAL MEDIA. 
            EXTENSIVE DAMAGE TO LARGE OUTDOOR STORAGE 
            BUILDING. TIME APPROXIMATED BY RADAR. 

0915 AM     TSTM WND DMG     4 N ISABEL              45.45N 101.43W
07/05/2022                   DEWEY              SD   TRAINED SPOTTER  

            EXTENSIVE DAMAGE NORTH OF ISABEL. DAMAGE TO 
            TREES, TREES UPROOTED, BROKEN HOUSE AND 
            VEHICLE WINDOWS, MACHINE SHED DESTROYED, 
            GRAIN BINS DESTROYED, COMPLETE LOSS OF CROPS 
            IN SOME AREAS. TIME ESTIMATED ON RADAR. 

0920 AM     HAIL             4 NE FIRESTEEL          45.47N 101.23W
07/05/2022  E2.50 INCH       DEWEY              SD   TRAINED SPOTTER  

            WINDS ESTIMATED AT 70-80 MPH. SKYLIGHTS 
            BROKE OUT OF HOUSE. DAMAGE TO PVC FENCE. 
            TREE BRANCHES DOWN. 

0937 AM     HAIL             2 N TIMBER LAKE         45.46N 101.07W
07/05/2022  E4.00 INCH       DEWEY              SD   PUBLIC           

            RELAYED VIA SOCIAL MEDIA PICTURE, COMPARING 
            TO DOLLAR BILL. TIME ESTIMATED BY RADAR. 

0940 AM     TSTM WND GST     1 SSW TIMBER LAKE       45.42N 101.08W
07/05/2022  M84 MPH          DEWEY              SD   MESONET          

            SDSU MESONET. 

0955 AM     HAIL             1 SSE GLENCROSS         45.43N 100.91W
07/05/2022  E1.75 INCH       DEWEY              SD   TRAINED SPOTTER  

            HEAVY RAIN, OUT OF ELECTRICITY FOR 30 
            MINUTES. 

1013 AM     HAIL             PROMISE                 45.33N 100.60W
07/05/2022  E4.00 INCH       DEWEY              SD   PUBLIC           

            2.5 INCHES OF RAIN FELL AS WELL. 

1031 AM     TSTM WND GST     1 NE RIDGEVIEW          45.09N 100.79W
07/05/2022  M62 MPH          DEWEY              SD   MESONET          

            MESONET STATION 204 RIDGEVIEW (SDDOT). 

1055 AM     TSTM WND GST     9 ENE MISSION RIDGE     44.74N 100.62W
07/05/2022  E66 MPH          SULLY              SD   PUBLIC           

            PERSONAL WEATHER STATION. 

1109 AM     TSTM WND GST     3 SSW WHITLOCKS BAY REC 45.01N 100.29W
07/05/2022  M71 MPH          POTTER             SD   MESONET          

            MESONET STATION 157 FOREST CITY (SDDOT). 

1115 AM     TSTM WND GST     1 WSW OVERLOOK REC AREA 44.45N 100.40W
07/05/2022  E60 MPH          STANLEY            SD   NWS EMPLOYEE     

            OCCURRED AT OAHE DAM. 

1121 AM     TSTM WND GST     4 N AGAR                44.90N 100.08W
07/05/2022  M75 MPH          POTTER             SD   MESONET          

            MESONET STATION 212 AGAR (SDDOT). 

1126 AM     TSTM WND GST     4 N AGAR                44.90N 100.08W
07/05/2022  M91 MPH          POTTER             SD   MESONET          

            MESONET STATION 212 AGAR (SDDOT). 

1135 AM     TSTM WND GST     7 ENE ONIDA             44.74N 99.93W
07/05/2022  M77 MPH          SULLY              SD   TRAINED SPOTTER  

            PERSONAL WEATHER STATION. 

1153 AM     TSTM WND GST     1 E PIERRE REGIONAL AIR 44.38N 100.28W
07/05/2022  M59 MPH          HUGHES             SD   ASOS             

            ASOS STATION KPIR PIERRE MUNI AP. 

1157 AM     TSTM WND GST     9 NNW VIVIAN            44.05N 100.33W
07/05/2022  M69 MPH          LYMAN              SD   MESONET          

            MESONET STATION 13 VIVIAN (SDDOT). 

1205 PM     TSTM WND GST     4 WSW BLUNT             44.50N 100.07W
07/05/2022  M58 MPH          HUGHES             SD   MESONET          

            MESONET STATION 185 BLUNT (SDDOT). 

1210 PM     TSTM WND GST     1 SE PIERRE REGIONAL AI 44.38N 100.29W
07/05/2022  M60 MPH          HUGHES             SD   MESONET          

            MESONET STATION DVI01443 PIERRE. 

1210 PM     HAIL             5 N HIGHMORE            44.59N 99.46W
07/05/2022  E1.75 INCH       HYDE               SD   TRAINED SPOTTER  

            ALSO HAD 60 MPH WINDS. 

1215 PM     TSTM WND GST     1 NW HIGHMORE           44.53N 99.46W
07/05/2022  M78 MPH          HYDE               SD   MESONET          

            SD MESONET STATION HIHS2. 

1215 PM     TSTM WND DMG     HIGHMORE                44.52N 99.44W
07/05/2022                   HYDE               SD   TRAINED SPOTTER  

            ROOF BLOWN OFF HOME. 

1216 PM     TSTM WND GST     17 W POLO               44.78N 99.45W
07/05/2022  M74 MPH          HYDE               SD   MESONET          

            MESONET STATION 215 JCT SD47/SD26 (SDDOT). 

1233 PM     TSTM WND GST     1 N REE HEIGHTS         44.53N 99.20W
07/05/2022  M84 MPH          HAND               SD   MESONET          

            MESONET STATION 312 REE HEIGHTS (SDDOT). 

1236 PM     TSTM WND GST     17 W POLO               44.78N 99.45W
07/05/2022  M65 MPH          HYDE               SD   MESONET          

            MESONET STATION 215 JCT SD47/SD26 (SDDOT). 

1238 PM     TSTM WND GST     1 N REE HEIGHTS         44.53N 99.20W
07/05/2022  M87 MPH          HAND               SD   MESONET          

            MESONET STATION 312 REE HEIGHTS (SDDOT). 

1242 PM     TSTM WND GST     MILLER DALE COLONY      44.40N 99.11W
07/05/2022  M62 MPH          HAND               SD   TRAINED SPOTTER  

            PERSONAL WEATHER STATION. 

1244 PM     TSTM WND GST     1 NE STEPHAN            44.26N 99.44W
07/05/2022  M63 MPH          HYDE               SD   MESONET          

            MESONET STATION 183 MACS CORNER (SDDOT). 

1250 PM     TSTM WND GST     MILLER                  44.52N 98.99W
07/05/2022  M68 MPH          HAND               SD   PUBLIC           

             

1251 PM     TSTM WND GST     17 W POLO               44.78N 99.45W
07/05/2022  M66 MPH          HYDE               SD   MESONET          

            MESONET STATION 215 JCT SD47/SD26 (SDDOT). 

1251 PM     TSTM WND GST     5 E ORIENT              44.90N 98.98W
07/05/2022  M59 MPH          HAND               SD   MESONET          

            MESONET STATION 158 MIRANDA (SDDOT). 

1251 PM     TSTM WND GST     1 NNW LEES CORNER       44.08N 99.33W
07/05/2022  M59 MPH          BUFFALO            SD   MESONET          

            MESONET STATION 289 LEES CORNER (SDDOT). 

1253 PM     TSTM WND GST     1 N REE HEIGHTS         44.53N 99.20W
07/05/2022  M65 MPH          HAND               SD   MESONET          

            MESONET STATION 312 REE HEIGHTS (SDDOT). 

1254 PM     TSTM WND GST     1 NE STEPHAN            44.26N 99.44W
07/05/2022  M66 MPH          HYDE               SD   MESONET          

            MESONET STATION 183 MACS CORNER (SDDOT). 

1255 PM     TSTM WND GST     2 W OACOMA              43.80N 99.42W
07/05/2022  M58 MPH          LYMAN              SD   MESONET          

            VIA SD MESONET OCMS2. 

0100 PM     TSTM WND DMG     MILLER                  44.52N 98.99W
07/05/2022                   HAND               SD   EMERGENCY MNGR   

            TREES UPROOTED AND MAJOR TREE LIMB DAMAGE IN 
            TOWN. 

0106 PM     TSTM WND GST     5 E ORIENT              44.90N 98.98W
07/05/2022  M61 MPH          HAND               SD   MESONET          

            MESONET STATION 158 MIRANDA (SDDOT). 

0117 PM     TSTM WND GST     12 ESE SUNSHINE BIBLE A 44.24N 98.77W
07/05/2022  M77 MPH          HAND               SD   MESONET          

            MESONET STATION RHUS2 DANFORTH 5 E. TIME 
            ESTIMATED VIA RADAR. 

0124 PM     TSTM WND GST     1 NE STEPHAN            44.26N 99.44W
07/05/2022  M70 MPH          HYDE               SD   MESONET          

            MESONET STATION 183 MACS CORNER (SDDOT). 

0126 PM     TSTM WND GST     1 NNW LEES CORNER       44.08N 99.33W
07/05/2022  M59 MPH          BUFFALO            SD   MESONET          

            MESONET STATION 289 LEES CORNER (SDDOT). 

0141 PM     TSTM WND GST     1 NNW LEES CORNER       44.08N 99.33W
07/05/2022  M60 MPH          BUFFALO            SD   MESONET          

            MESONET STATION 289 LEES CORNER (SDDOT). 

0149 PM     NON-TSTM WND GST 1 NE STEPHAN            44.26N 99.44W
07/05/2022  M66 MPH          HYDE               SD   MESONET          

            MESONET STATION 183 MACS CORNER (SDDOT). 
            WAKE LOW WINDS. 

0154 PM     NON-TSTM WND GST 1 NE STEPHAN            44.26N 99.44W
07/05/2022  M60 MPH          HYDE               SD   MESONET          

            MESONET STATION 183 MACS CORNER (SDDOT). 
            WAKE LOW WINDS. 

0159 PM     TSTM WND GST     9 SSE SPINK COLONY      44.63N 98.22W
07/05/2022  M62 MPH          SPINK              SD   MESONET          

            MESONET STATION 284 JCT SD28/SD37 (SDDOT). 

0201 PM     NON-TSTM WND GST 3 N GANN VALLEY         44.08N 98.99W
07/05/2022  M73 MPH          BUFFALO            SD   MESONET          

            MESONET STATION 201 GANN VALLEY (SDDOT). 
            WAKE LOW WINDS. 

0201 PM     NON-TSTM WND GST 1 NNW LEES CORNER       44.08N 99.33W
07/05/2022  M59 MPH          BUFFALO            SD   MESONET          

            MESONET STATION 289 LEES CORNER (SDDOT). 
            WAKE LOW WINDS. 

0219 PM     NON-TSTM WND GST 3 SE RELIANCE           43.85N 99.56W
07/05/2022  M62 MPH          LYMAN              SD   MESONET          

            MESONET STATION 54 RELIANCE (SDDOT). WAKE 
            LOW WINDS. 


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