Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >
Overview
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Severe thunderstorms tracked across much of eastern Iowa and northwest Illinois in the early afternoon hours of May 23rd, 2020. Storms quickly intensified in an extremely favorable environment, which was the result of a warm front lifting north across the Midwest. Hazards including tornadoes, torrential rainfall, and large hail. 7 tornadoes were confirmed from this event. Please see the Tornado tab for more details and locations.
Summaries from Other Offices |
 Tornado Watch #207 Graphic |
Tornadoes
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Tornado #1 - 4.3 miles SE Solon, IA
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Tornado #2 - Mechanicsville, IA
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Tornado #3 - 1.2 miles NE Andrew, IA
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Tornado #4 - Coleta, IL
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Tornado #5 - Warren, IL
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Tornado #7 - 0.5 miles S Maquoketa, IA
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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 |
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Storm Reports
| Interactive Storm Report Map | SPC Storm Reports |
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PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
514 PM CDT SAT MAY 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0502 PM HEAVY RAIN 3 SW WINNESHIEK 42.32N 89.57W
05/23/2020 M1.50 INCH STEPHENSON IL TRAINED SPOTTER
RAINFALL TOTAL. STORMS HAVE ENDED.
0500 PM HEAVY RAIN 3 N STOCKTON 42.40N 90.00W
05/23/2020 M1.69 INCH JO DAVIESS IL CO-OP OBSERVER
RAINFALL TOTAL TODAY. STORMS HAVE ENDED.
0420 PM TORNADO WARREN 42.50N 89.99W
05/23/2020 JO DAVIESS IL TRAINED SPOTTER
REPORT OF A TORNADO JUST NORTH OF WARREN BY
A TRAINED SPOTTER, RELAYED FROM COUNTY 911.
0249 PM TORNADO 3 SE MILLEDGEVILLE 41.94N 89.73W
05/23/2020 CARROLL IL TRAINED SPOTTER
BRIEF TORNADO TOUCHDOWN SOUTHEAST OF
MILLEDGEVILLE, HAS SINCE LIFTED. HAVE HAD
SEVERAL REPORTS OF BRIEF TOUCHDOWNS.
0247 PM TSTM WND DMG 3 ENE COLETA 41.92N 89.75W
05/23/2020 WHITESIDE IL FIRE DEPT/RESCUE
DELAYED REPORT. REPORT OF WIRES DOWN AND
DAMAGE TO A HOME; SHINGLES OFF THE ROOF.
POSSIBLE TORNADO DAMAGE. TIME ESTIMATED FROM
RADAR.
0246 PM TSTM WND DMG 3 ENE COLETA 41.92N 89.75W
05/23/2020 WHITESIDE IL TRAINED SPOTTER
POWER LINES DOWN ACROSS ROADWAY. 14 INCH
TREE DIAMETER TREE SNAPPED. POSSIBLE TORNADO
DAMAGE. TIME ESTIMATED FROM RADAR.
0225 PM TORNADO 1 NNE ANDREW 42.17N 90.58W
05/23/2020 JACKSON IA TRAINED SPOTTER
A TRAINED SPOTTER REPORTED A TORNADO ON THE
GROUND 1 MILE NORTH NORTHEAST OF ANDREW.
0110 PM FUNNEL CLOUD TORONTO 41.91N 90.86W
05/23/2020 CLINTON IA PUBLIC
RELAYED BY LAW ENFORCEMENT, ROTATING WALL
CLOUD WITH FUNNEL. NOT TOUCHING THE GROUND.
0103 PM HAIL HAMPTON 41.56N 90.41W
05/23/2020 M0.50 INCH ROCK ISLAND IL PUBLIC
0103 PM TORNADO MECHANICSVILLE 41.90N 91.25W
05/23/2020 CEDAR IA LAW ENFORCEMENT
RELAYED BY CEDAR RAPIDS WARNING POINT OF
TORNADO ON THE GROUND AND MOVING NORTH. TIME
ESTIMATED USING RADAR.
1243 PM TORNADO SUTIFF 41.83N 91.38W
05/23/2020 JOHNSON IA FIRE DEPT/RESCUE
THE LISBON FIRE CHIEF REPORTED A TORNADO ON
THE GROUND SOUTH OF SUTLIFF. THERE ARE
MULTIPLE REPORTS AND PHOTOS FROM THE SAME
AREA. TIME ESTIMATED BASED ON RADAR.
1238 PM TSTM WND DMG 1 NE MORSE 41.76N 91.42W
05/23/2020 JOHNSON IA BROADCAST MEDIA
REPORTED RELAYED FROM BROADCAST MEDIA.
DAMAGE TO TREES AND FARM OUTBUILDINGS.
POSSIBLE TORNADO DAMAGE. TIME ESTIMATED FROM
RADAR.
1230 PM FUNNEL CLOUD 1 SW MORSE 41.75N 91.44W
05/23/2020 JOHNSON IA TRAINED SPOTTER
TRAINED SPOTTER ON MORSE RD COULD SEE A
FUNNEL BUT COULD NOT TELL IF IT WAS ON THE
GROUND.
1211 PM HAIL ERIE 41.66N 90.08W
05/23/2020 E1.00 INCH WHITESIDE IL TRAINED SPOTTER
Rain Reports
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Local Rain Map
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Regional Rain Map (Courtesy of MRCC)
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24 hour precipitation reports (in Inches), for eastern Iowa, northwest and west central Illinois, and northeast Missouri. Reported between Midnight and 9 AM, Sunday May 24, 2020. ....IOWA.... Maquoketa 4 W 1.30 Dubuque LD11 1.27 Wellman 4.0 E 1.16 Mason City 1 NNE 1.04 Riverdale 0.5 N 0.90 Toledo 3 N 0.82 Rickardsville 0.2 W 0.82 Davenport 0.9 WNW 0.80 Iowa City Arpt 0.77 Fayette 1 NW 0.73 West Liberty 0.7 NNW 0.67 Cedar Rapids 2.7 NE 0.59 Marion 1.7 NNW 0.56 Camanche 1.2 W 0.55 Dubuque Arpt 0.55 Monticello 1 E 0.55 Iowa City 0.53 Dubuque #3 7 SW 0.48 Bellevue LD12 0.44 Newton 1 NE 0.42 Fairfax 4.0 NW 0.40 Mason City ASOS 6 W 0.39 Kalona 7.3 NNW 0.39 Manchester 0.39 Anamosa 3 SSW 0.33 North Liberty 0.7 SSW 0.30 Waterloo ASOS 5 NW 0.30 Guttenberg Dam 10 0.30 Williamsburg 0.30 Davenport Arpt 0.29 Center Point 0.6 NNW 0.28 Asbury 0.4 SW 0.27 Charlotte 1.9 WNW 0.27 Park View 0.2 WSW 0.26 Elkader 6SSW 0.25 Marengo 3.6 N 0.25 Strawberry Point 0.22 Amana 4.7 W 0.22 Cedar Rapids Arpt 5 SW 0.21 Ainsworth 7.4 N 0.18 Eldridge 0.7 SSW 0.17 Marshalltown ASOS 4 N 0.16 Tripoli 0 N 0.15 Sigourney 0.10 Hampton 1 N 0.10 Oelwein AWOS 0.09 Calamus 2.0 NE 0.09 Washington 0.05 Washington 5.8 SW 0.05 NWS Johnston* 5 NNW 0.05 Centerville 0 NE 0.04 Brighton 0.04 Wapello 5.4 SE 0.03 Parnell 0.1 SSW 0.02 Muscatine 2.1 NNW 0.01 Ottumwa ASOS 6 NNW 0.01 Burlington Arpt 2 SW 0.01 Pella AWOS 2 WSW 0.01 Perry 0 W 0.01 Muscatine 2N 0.00 Allerton 2 S 0.00 Rathbun Reservoir 2 N 0.00 Oskaloosa AWOS 9 ESE 0.00 Wapello 0.2 S 0.00 New London 1.5 SW 0.00 Burlington 6.5 SSW 0.00 Burlington 2.1 S 0.00 Keokuk LD19 0.00 Fairfield 0.00 Cantril 0.9 SSE 0.00 ....ILLINOIS.... Orangeville 2.8 NW 2.25 Davis 0.5 N 1.92 Elizabeth 1.65 Freeport 1.44 Winslow 4.3 ESE 1.43 Ridott 0.1 NE 1.16 Morrison 3.2 E 1.15 Mundelein 1.06 Romeoville 0.97 Moline 0.7 NNE 0.71 Woodhull 0.3 ESE 0.58 Freeport 2.0 NW 0.52 Freeport 1.7 NW 0.50 Quad City Arpt 0.49 Coal Valley 1.9 SE 0.38 Kewanee 1 E 0.37 Dakota 4.8 NW 0.34 Coal Valley 2.6 E 0.31 Minonk 0.30 New Boston LD17 0.26 Paw Paw 1 E 0.20 Walnut 5.3 ENE 0.20 Tuscola 0.16 Princeton 1.1 SE 0.15 Princeton 0.15 Peoria ASOS 0.14 Windsor 0.10 Rockford ASOS 0.10 Ogden 0.10 Rochelle AWOS 0.09 Aledo 0.07 Streator 3 SE 0.06 Geneseo 2.0 NW 0.05 Jacksonville AWOS 0.03 New Windsor 2.0 N 0.03 Decatur Airport 0.02 Steward 0.01 Roscoe 2SE 0.01 Ill. City LD16 3 WNW 0.01 Mendota 2 SE 0.00 Bentley 0.00 Galesburg 0.00 Gladstone LD18 0.00 Colchester 3.5 NE 0.00 Joliet 0.00 Nauvoo 0.7 SSE 0.00 Quincy ASOS 0.00 Macomb 0.00 Bloomington Airport 0.00 Galesburg Arpt 3 SW 0.00 Lincoln NWS 0.00 ....MISSOURI.... Columbia 0.00 Memphis 0.00 Chillicothe 2 NW 0.00 Kirksville ASOS 0.00 ....WISCONSIN.... Monroe 1 W 1.61 Beloit-College 1.13 Madison-ASOS 0.80 Prairie du Chien AWOS 0.76 Brodhead 1 SW 0.45 Darlington 0.42 La Crosse WFO 0.40 Whitewater 0.40 Steuben 4SE 3 NE 0.35 Viroqua 0.26 Watertown-AWOS 0.17 Allenton-WWTP .6 NW 0.17 |
Environment
SPC EVENT REVIEW PAGE: 05/20/2020
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| SPC Categorical Outlook | Tornado Outlook | Wind Outlook | Hail Outlook |
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| MCD 680 (text) | MCD 685 (text) |
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| 7 AM DAVENPORT, IA SOUNDING | 1 PM DAVENPORT, IA |
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