Quad Cities, IA/IL

Weather Forecast Office

Event Summary: September 25th, 2018

Overview

A line of strong storms tracked east across eastern Iowa, northwest Illinois, and northeast Missouri Tuesday afternoon, September 25. These storms produced several tornadoes (see tab below for additional info) and widespread 60 mph winds with isolated higher gusts to over 80 mph, which downed trees and power lines. They also produced frequent lightning and heavy rain. Another area that saw substantial wind damage was from in eastern Rock Island County; near East Moline, IL; to northern Henry and Bureau counties.

Radar Image: Tuesday 9/25 1:30 pm

Tornado
Photos & Video
Radar
Storm Reports
Rainfall
Environment

Tornadoes:

Tornado #1 - Mechanicsville, IA
Cedar County

Date	09/25/2018
Time (Local)	1:53 - 1:54 pm CDT
EF Rating	EF-0
Est. Peak Winds	80 mph
Path Length	0.05 mi
Max Width	20 yards
Injuries/Deaths	0 / 0
Summary: Brief tornado touchdown. Lofted 2 grain bins and caused damage to corn.

Track Map

Tornado #2 - S Alburnett
Linn County

Date	9/25/2018
Time (Local)	1:29 - 1:30 PM CDT
EF Rating	EF-1
Est. Peak Winds	110
Path Length	0.12 miles
Max Width	20 yards
Injuries/Deaths	0
Summary: A brief high end EF-1 tornado snapped and uprooted trees at a farmstead. the tornado was embedded in a roughly quarter mile wide swath of straight line wind damage with estimated wind speeds of 80 to 90 MPH.

Track Map

Downloadable KMZ File

Tornado #3 - WNW Winfield

Henry County

Date	9/25/2018
Time (Local)	1:26 - 1:27 PM CDT
EF Rating	EF-0
Est. Peak Winds	85 MPH
Path Length	0.27 miles
Max Width	20 yards
Injuries/Deaths	0
Summary: A stronger EF-0 tornado touched down northwest of Winfield Iowa. Damage to trees and corn were noted along its little over a quarter of a mile long path. The max width was estimated to be 20 yards. The strongest winds were estimated to be 85 MPH.

Track Map

Downloadable KMZ File

Tornado #4 - N Winfield
Henry County

Date	9/25/2018
Time (Local)	2:14-2:16 PM CDT
EF Rating	EF-1
Est. Peak Winds	95 MPH
Path Length	1.06 miles
Max Width	20 yards
Injuries/Deaths	0
Summary: An EF-1 tornado traveled a little over a mile and caused damage to trees along its path. Some houses were damaged by falling trees. The tornado at its widest was around 20 yards. Maximum winds were around 95 MPH.

Track Map

Downloadable KMZ File

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

Photos & Video:


Storm damage in Alburnett, IA (NWS Storm Survey)	Tree damage in Alburnett, IA (NWS Storm Survey)	Tree damage in Alburnett, IA (NWS Storm Survey)	Barn damage from straight-line winds in Milledgeville,IL (NWS Storm Survey)


Damage to brick wall from straight-line winds in Milledgeville,IL (NWS Storm Survey)	Barn roof damage from straight-line winds in Milledgeville,IL (NWS Storm Survey)	Uprooted Tree in Milledgeville, IL (photo courtesy Cheryl Neumann)	Storm damage in East Moline, IL from stright-line winds (photo courtesy Christian Allen)

Radar:

Radar Loop - Courtesy Iowa Environmental Mesonet

Storm Reports

Interactive Storm Report Map	SPC Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
834 PM CDT TUE SEP 25 2018

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

0122 PM     TSTM WND GST     CEDAR RAPIDS MUNICIPAL  41.88N 91.72W 
09/25/2018  M54.00 MPH       LINN               IA   ASOS            

0124 PM     TSTM WND GST     HIAWATHA                42.05N 91.68W 
09/25/2018  E60.00 MPH       LINN               IA   TRAINED SPOTTER 

0126 PM     TSTM WND GST     2 W CEDAR RAPIDS        41.98N 91.71W 
09/25/2018  E60.00 MPH       LINN               IA   TRAINED SPOTTER 

0136 PM     TSTM WND DMG     S ALBURNETT             42.15N 91.62W 
09/25/2018                   LINN               IA   TRAINED SPOTTER 

            SEVERAL HEALTHY LARGE TREE BRANCHES DOWN...TIME ESTIMATED
            FROM RADAR.

0147 PM     TSTM WND GST     IOWA CITY MUNICIPAL AIR 41.63N 91.55W 
09/25/2018  M44.00 MPH       JOHNSON            IA   ASOS            

0153 PM     TORNADO          1 SSW MECHANICSVILLE    41.89N 91.26W 
09/25/2018                   CEDAR              IA   NWS STORM SURVEY

            BRIEF TORNADO SOUTH OF TOWN. LOFTED 2 GRAIN BINS AND 
            CAUSED DAMAGE TO SOME CORN.

0200 PM     HEAVY RAIN       1 SSW NORTH LIBERTY     41.73N 91.61W 
09/25/2018  M1.38 INCH       JOHNSON            IA   COCORAHS        

            STORM TOTAL...RAIN FELL IN PAST 45 MINUTES.

0255 PM     TSTM WND DMG     CARBON CLIFF            41.50N 90.39W 
09/25/2018                   ROCK ISLAND        IL   TRAINED SPOTTER 

            SEVERAL LARGE TREES UPROOTED ALONG WITH A SNAPPED POWER 
            POLE. TIME ESTIMATED BASED ON RADAR.

0306 PM     TSTM WND DMG     2 SE EAST MOLINE        41.50N 90.40W 
09/25/2018                   ROCK ISLAND        IL   NWS STORM SURVEY

            DETERMINED STRAIGHT LINE WINDS OF 90-100 MPH CAUSED 
            SIGNIFICANT DAMAGE FROM CARBON CLIFF IL TO BARSTOW IL. 
            DAMAGE INCLUDED LARGE TREES SNAPPED AND UPROOTED. SNAPPED
            POWER POLES WERE ALSO FOUND.

0309 PM     TSTM WND DMG     2 E EAST MOLINE         41.51N 90.38W 
09/25/2018                   ROCK ISLAND        IL   EMERGENCY MNGR  

            SEVERAL SNAPPED TREES, POWER POLES DOWN IN EASTERN ROCK 
            ISLAND COUNTY...TIME ESTIMATED FROM RADAR.

0320 PM     TSTM WND DMG     MILLEDGEVILLE           41.96N 89.78W 
09/25/2018                   CARROLL            IL   TRAINED SPOTTER 

            LARGE TREE UPROOTED IN TOWN

0325 PM     TSTM WND DMG     MILLEDGEVILLE           41.96N 89.78W 
09/25/2018                   CARROLL            IL   EMERGENCY MNGR  

            MULTIPLE LARGE TREES DOWN, EMPTY GRAIN BIN OVER RAILROAD 
            TRACKS, AND POWER LINES DOWN IN TOWN.

0327 PM     TSTM WND GST     MILLEDGEVILLE           41.96N 89.78W 
09/25/2018  M60.00 MPH       CARROLL            IL   TRAINED SPOTTER 

0339 PM     TSTM WND DMG     MILLEDGEVILLE           41.96N 89.78W 
09/25/2018                   CARROLL            IL   EMERGENCY MNGR  

            SEVERAL LARGE TREES AND WIRES DOWN IN TOWN. ALSO REPORTED
            WIND GUST OF 61 MPH.

0355 PM     TSTM WND DMG     1 NW WALNUT             41.57N 89.60W 
09/25/2018                   BUREAU             IL   EMERGENCY MNGR  

            POWER LINES DOWN AND ARCING ON 1050 EAST ST, 1 MILE NORTH
            OF HIGHWAY 92

0403 PM     TSTM WND DMG     N PRINCETON             41.38N 89.47W 
09/25/2018                   BUREAU             IL   EMERGENCY MNGR  

            LARGE TREE DOWN ON HIGHWAY 26 BLOCKING THE 
            NORTHBOUND/SOUTHBOUND LANES NORTH OF PRINCETON

0452 PM     TSTM WND DMG     MC NABB                 41.18N 89.21W 
09/25/2018                   PUTNAM             IL   LAW ENFORCEMENT 

            SEVERAL TREES DOWN IN TOWN...TIME ESTIMATED FROM RADAR.

Rain Reports

Local Rainfall Map	Regional Estimated Rainfall

24 hour precipitation reports (in Inches),
for eastern Iowa, northwest and west central Illinois,
and northeast Missouri. Reported between Midnight and 9 AM,
Wednesday September 26, 2018.

....IOWA....
Center Point 0.6 NNW             1.67
Perry 0 W                        1.56
Ames US 30 2 SSE                 1.54
Solon 0.3 ESE                    1.35
Central City 6.7 W               1.22
Mount Auburn 2.2 NNW             1.15
Coggon                           1.14
Waterloo ASOS 5 NW               1.14
NWS Johnston* 5 NNW              1.13
Boone 1 SSW                      1.06
Tripoli 0 N                      0.98
Marshalltown 1 NW                0.96
Monticello 1 E                   0.96
Cascade                          0.93
Marshalltown ASOS 4 N            0.92
Iowa City Arpt                   0.91
Hopkinton 5.4 WSW                0.89
Manchester                       0.88
Bettendorf 2.2 SE                0.82
De Witt                          0.82
Elkader 6SSW                     0.81
Oelwein AWOS                     0.79
Brighton                         0.76
Salem 1S                         0.69
Delmar 2.3 NW                    0.68
Salem 3.1 ESE                    0.67
Davenport 0.9 SSW                0.66
Calamus 2.0 NE                   0.65
Ely 0.5 SE                       0.61
Ottumwa ASOS 6 NNW               0.61
Dubuque #3 7 SW                  0.60
Camanche 1.2 W                   0.59
New London 1.5 SW                0.59
Marion 1.7 NNW                   0.58
Guttenberg Dam 10                0.58
Grinnell AWOS 2 SSW              0.57
Marengo                          0.56
Center Junction 2.6 W            0.55
Goose Lake 6.4 SSW               0.55
Le Claire LD14                   0.55
Kalona 7.3 NNW                   0.50
Maquoketa 4W                     0.48
Dubuque LD11                     0.47
Belle Plaine                     0.44
Anamosa 3 SSW                    0.42
Bettendorf 1.6 WSW               0.42
Dubuque Arpt 7 SW                0.41
Keokuk LD19                      0.41
Cedar Rapids 2.7 NE              0.40
Hampton 1 N                      0.40
Cresco 1 NE                      0.36
Bellevue LD12                    0.35
Davenport 0.9 WNW                0.35
Cedar Rapids Arpt 5 SW           0.34
Fairfield 0.6 E                  0.33
Williamsburg                     0.32
Park View 0.2 WSW                0.31
Fairfield                        0.30
Mason City 1 NNE                 0.29
Eldridge 0.6 S                   0.29
Donnellson                       0.28
Eldridge 0.7 SSW                 0.26
Muscatine 2N                     0.25
Mason City ASOS 6 W              0.22
Ainsworth 7.4 N                  0.21
Mason City* 0 E                  0.20
Muscatine 1.4 N                  0.20
Rathbun Reservoir 2 N            0.19
Washington                       0.19
Pella 4 N                        0.18
Iowa City                        0.18
Keosauqua                        0.18
Oskaloosa 1 NNW                  0.17
West Point 7.5 NW                0.14
Davenport Arpt 5 N               0.13
Burlington Arpt 2 SW             0.12
Centerville 0 NE                 0.11
Pella AWOS 2 WSW                 0.11
Sigourney                        0.10
Burlington 2S                    0.08
Burlington 6.5 SSW               0.03
Beaconsfield 1 NNE               0.02
Oskaloosa AWOS 9 ESE             0.00
....ILLINOIS....
Moline 0.7 NNE                   1.19
Quad City Arpt 3 S               0.84
Geneseo 2.0 NW                   0.68
Bloomington Airport              0.66
Shannon 0.2 S                    0.62
Ottawa 4 SW                      0.58
Macomb 3.8 NW                    0.55
Atkinson 2.6 NNE                 0.53
Morrison 3.2 E                   0.52
Decatur Airport                  0.49
Gladstone LD18                   0.48
Mundelein                        0.46
Rock Falls                       0.45
Galena                           0.44
Coleta 1.4 SSW                   0.44
New Boston LD17                  0.43
Colchester 3.5 NE                0.43
Elizabeth                        0.41
Steward                          0.40
Rochelle                         0.37
Freeport                         0.33
Romeoville                       0.32
Freeport 2.0 NW                  0.32
Chadwick 2.7 WSW                 0.31
Davis 0.5 N                      0.29
St Anne                          0.28
Milan 8.8 SSW                    0.27
New Windsor 2.0 N                0.26
Orangeville 2.8 NW               0.25
Freeport 1.7 ESE                 0.22
Tiskilwa 2.1 N                   0.22
Streator 3 SE                    0.20
Princeton 1.1 SE                 0.19
Princeton                        0.19
Mendota 2 SE                     0.18
Ill. City LD16 3 WNW             0.18
Rockford ASOS                    0.15
Roscoe 2SE                       0.14
Kewanee 1 E                      0.13
La Harpe                         0.06
Augusta                          0.06
Peoria ASOS                      0.02
Quincy ASOS                      0.00
Lincoln NWS                      0.00
Rochelle AWOS                    0.00
Quincy Dam 21                    0.00
Joliet                           0.00
Coal Valley 1.9 SE               0.00
Galesburg Arpt 3 SW              0.00
Jacksonville AWOS                0.00
....MISSOURI....
Kahoka 0.6 S                     0.34
Columbia                         0.27
Memphis                          0.16
Memphis 0.1 S                    0.04
Canton LD20                      0.03
Kirksville ASOS                  0.00
Chillicothe 2 NW                 0.00
....WISCONSIN....
Steuben 4SE 3 NE                 1.08
Darlington                       0.85
Viroqua                          0.79
Madison-ASOS                     0.52
La Crosse WFO                    0.27
Monroe 1 W                       0.23
Beloit-College                   0.22
Brodhead 1 SW                    0.21
Delavan-1 W-WWTP 1 W             0.14
Watertown-AWOS                   0.00
Prairie du Chien AWOS            0.00
....MINNESOTA....
Preston                          0.10
Grand Meadow                     0.05

Environment


Figure 1: SPC Day 1 Outlook (1630z)	Figure 2: SPC Day 1 Tornado Outlook (1630z)	Figure 3: SPC Day 1 Wind Outlook (1630z)	Figure 4: SPC Day 1 Hail Outlook (1630z)


Figure 5: DVN Sounding 9/25/18 12z	Figure 6: DVN Sounding 9/25/18 18z

Additional environmental data.


Figure 7: SPC Mesoscale Discussion (see link for details)

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Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Event Summary: September 25th, 2018