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 >
Event Summary: August 20, 2019
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A line of strong to severe thunderstorms impacted much of eastern Iowa, northwest Illinois, and northeast Missouri early Tuesday morning. This line of storms produced wind gusts to 70 MPH and several reports of wind damage. Several trees and power lines were taken down in Mediapolis, Monmouth and Roseville. In addition, torrential rainfall fell with storms as they formed along and north of the I-80 and I-380 corridors. Rainfall amounts of 1-4 inches were reported, which lead to flash flooding in southern portions of the Cedar Rapids metro.
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Storm Reports
| SPC Storm Reports |
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| IEM MESONET STORM REPORTS |
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1155 AM CDT TUE AUG 20 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1118 AM HEAVY RAIN 1 ENE MONTPELIER 41.47N 90.78W
08/20/2019 M1.43 INCH SCOTT IA TRAINED SPOTTER
STORM TOTAL.
1118 AM HEAVY RAIN W BELLE PLAINE 41.90N 92.28W
08/20/2019 M3.00 INCH BENTON IA TRAINED SPOTTER
STORM TOTAL.
1045 AM HEAVY RAIN W KEOSAUQUA 40.74N 91.97W
08/20/2019 M1.40 INCH VAN BUREN IA TRAINED SPOTTER
1030 AM HEAVY RAIN W CANTRIL 40.64N 92.07W
08/20/2019 M1.30 INCH VAN BUREN IA TRAINED SPOTTER
STORM TOTAL.
1030 AM HEAVY RAIN 1 NE FORT MADISON 40.64N 91.33W
08/20/2019 M1.00 INCH LEE IA TRAINED SPOTTER
STORM TOTAL.
1020 AM HEAVY RAIN WEST BURLINGTON 40.82N 91.18W
08/20/2019 M1.00 INCH DES MOINES IA TRAINED SPOTTER
STORM TOTAL.
1004 AM HEAVY RAIN 2 NNE CEDAR RAPIDS 42.01N 91.65W
08/20/2019 M1.34 INCH LINN IA TRAINED SPOTTER
1003 AM HEAVY RAIN 2 WNW DUBUQUE 42.52N 90.72W
08/20/2019 M1.05 INCH DUBUQUE IA TRAINED SPOTTER
STORM TOTAL.
0940 AM HEAVY RAIN 2 NNW NORTH LIBERTY 41.76N 91.62W
08/20/2019 M1.41 INCH JOHNSON IA TRAINED SPOTTER
STORM TOTAL.
0938 AM HEAVY RAIN 2 W CEDAR RAPIDS 41.98N 91.71W
08/20/2019 M1.52 INCH LINN IA TRAINED SPOTTER
STORM TOTAL.
0856 AM LIGHTNING WASHINGTON 41.31N 91.69W
08/20/2019 WASHINGTON IA EMERGENCY MNGR
LIGHTNING STRUCK A HOME AND LEAD TO A FIRE.
0848 AM TSTM WND DMG MOLINE 41.49N 90.49W
08/20/2019 ROCK ISLAND IL BROADCAST MEDIA
LARGE TREE LIMB DOWN AT 12TH STREET AND 25TH
AVE IN MOLINE. REPORT RELAYED BY BROADCAST
MEDIA. TIME ESTIMATED FROM RADAR.
0825 AM TSTM WND DMG 1 W ROSEVILLE 40.73N 90.67W
08/20/2019 WARREN IL TRAINED SPOTTER
SEVERAL 8 INCH DIAMETER TREE BRANCHES DOWN.
TIME ESTIMATED FROM RADAR.
0821 AM HEAVY RAIN 1 NNE WILLIAMSBURG 41.68N 92.00W
08/20/2019 M3.10 INCH IOWA IA TRAINED SPOTTER
.
0820 AM TSTM WND DMG MONMOUTH 40.91N 90.64W
08/20/2019 WARREN IL LAW ENFORCEMENT
TREES AND POWER LINES DOWN IN MONMOUTH AND
JUST TO THE NORTH OF THE CITY. TIME
ESTIMATED FROM RADAR.
0755 AM TSTM WND DMG MEDIAPOLIS 41.01N 91.16W
08/20/2019 DES MOINES IA EMERGENCY MNGR
SEVERAL REPORTS OF LARGE TREES AND BRANCHES
DOWN, ALONG WITH A LEANING POWER POLE BEING
HELP BY POWER LINES.
0755 AM TSTM WND GST MIDDLETOWN 40.83N 91.26W
08/20/2019 E65 MPH DES MOINES IA TRAINED SPOTTER
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0752 AM HEAVY RAIN PARNELL 41.58N 92.01W
08/20/2019 M1.40 INCH IOWA IA TRAINED SPOTTER
RAINFALL TOTAL SO FAR THIS MORNING.
0750 AM TSTM WND DMG MIDDLETOWN 40.83N 91.26W
08/20/2019 DES MOINES IA PUBLIC
LARGE 6-8 INCH DIAMETER TREE DOWN IN
BACKYARD. RECEIVED PHOTO FROM SOCIAL MEDIA.
0744 AM TSTM WND GST NEW LONDON 40.93N 91.41W
08/20/2019 M70 MPH HENRY IA TRAINED SPOTTER
SPOTTER REPORT RELAYED BY EMERGENCY
MANAGEMENT.
0743 AM HEAVY RAIN KEYSTONE 42.00N 92.20W
08/20/2019 M3.72 INCH BENTON IA PUBLIC
SPOTTER REPORT RELAYED FROM BROADCAST MEDIA.
TOTAL RAINFALL SO FAR.
0730 AM LIGHTNING 2 ENE OAKDALE 41.71N 91.56W
08/20/2019 JOHNSON IA BROADCAST MEDIA
LIGHTNING STRUCK A HOME AND CAUSED A FIRE.
REPORT RELAYED BY BROADCAST MEDIA.
0656 AM FLASH FLOOD 2 S CEDAR RAPIDS 41.94N 91.68W
08/20/2019 LINN IA BROADCAST MEDIA
SEVERAL ROADS EXPERIENCING FLASH FLOODING
ACROSS SOUTHERN CEDAR RAPIDS METRO. ONE CAR
STALLED NEAR THE INTERSECTION OF 33RD AVE SW
AND 6TH ST SW.
0650 AM TSTM WND DMG SIGOURNEY 41.33N 92.21W
08/20/2019 KEOKUK IA BROADCAST MEDIA
REPORT OF TREE AND POWER LINE DAMAGE IN
SIGOURNEY RELAYED FROM BROADCAST MEDIA. TIME
ESTIMATED FROM RADAR.
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Area Rainfall Amounts
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24-hr Local Rainfall Map |
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24 hour precipitation reports (in Inches), Tuesday August 20, 2019.
....IOWA.... Belle Plaine 2.45 Marengo 3.6 N 2.26 Williamsburg 1.95 Marshalltown 1 NW 1.84 Fairfax 4.0 NW 1.59 NWS Johnston* 5 NNW 1.55 Waterloo ASOS 5 NW 1.48 Toledo 3 N 1.42 North English 1.24 North Liberty 0.7 SSW 1.23 Marshalltown ASOS 4 N 1.15 Marengo 2.6 SSW 1.11 Perry 0 W 1.09 Cedar Rapids Arpt 5 SW 1.07 Hampton 1 N 1.00 Hopkinton 5.4 WSW 0.85 Pella 4 N 0.81 Oskaloosa 1 NNW 0.70 Anamosa 3 SSW 0.62 Iowa City 8.0 NE 0.60 Pella AWOS 2 WSW 0.57 Boone 1 SSW 0.45 Mount Auburn 2.2 NNW 0.42 Morning Sun 1.7 E 0.40 West Branch 2.0 NNW 0.38 Vinton 0.37 Iowa City Arpt 0.35 Ottumwa ASOS 6 NNW 0.33 Nichols 3.2 SSW 0.29 Kalona 7.3 NNW 0.25 Independence 1.2 N 0.23 Mason City 1 NNE 0.16 Manchester 0.16 Center Junction 2.6 W 0.13 Elkader 6SSW 0.11 Stanley 0.09 Oskaloosa AWOS 9 ESE 0.09 Muscatine 2.1 N 0.09 Muscatine 2N 0.08 Tripoli 0 N 0.08 Ainsworth 7.4 N 0.08 Center Point 0.6 NNW 0.07 Beaconsfield 1 NNE 0.06 Eldridge 0.7 SSW 0.06 De Witt 0.06 Cedar Rapids 2.7 NE 0.04 Marion 1.7 NNW 0.04 Central City 6.7 W 0.03 Solon 0.3 ESE 0.03 Davenport Arpt 5 N 0.02 Mason City ASOS 6 W 0.02 Davenport 0.9 WNW 0.02 Riverdale 0.5 N 0.02 Wellman 4.0 E 0.02 Asbury 0.4 SW 0.02 Washington 5.8 SW 0.01 Park View 0.2 WSW 0.01 West Point 7.5 NW 0.01 Bettendorf 1.6 WSW 0.01 Bettendorf 2.2 SE 0.00 Burlington 6.5 SSW 0.00 Cresco 1 NE 0.00 Burlington Arpt 2 SW 0.00 Charlotte 1.9 WNW 0.00 Davenport 0.9 SSW 0.00 Keosauqua 0.00 Dubuque Arpt 7 SW 0.00 Le Claire LD14 0.00 Bellevue LD12 0.00 Dubuque LD11 0.00 Oelwein AWOS 0.00 Donnellson 0.00 Keokuk LD19 0.00 Le Claire 1.8 NNE 0.00 Grinnell AWOS 2 SSW 0.00 Salem 3.1 ESE 0.00 ....ILLINOIS.... Atkinson 2.6 NNE 0.26 Mendota 2 SE 0.17 Ottawa 4 SW 0.11 Walnut 5.3 ENE 0.11 Steward 0.10 Paw Paw 1 E 0.04 Monmouth 4NW 0.03 Streator 3 SE 0.03 Tiskilwa 2.1 N 0.02 Fulton LD13 0.02 Davis 0.5 N 0.01 Freeport 1.7 ESE 0.01 Moline 0.7 NNE 0.01 Freeport 2.0 NW 0.01 Kewanee 1 E 0.01 Coal Valley 2.6 E 0.01 Geneseo 2.0 NW 0.01 Princeton 1.1 SE 0.00 Quad City Arpt 3 S 0.00 Princeton 0.00 Freeport 1.7 NW 0.00 New Windsor 2.0 N 0.00 Aledo 0.00 Rockford ASOS 0.00 Mundelein 0.00 Galva 2.7 NE 0.00 Decatur Airport 0.00 Bentley 0.00 Rock Falls 0.00 Romeoville 0.00 Rochelle AWOS 0.00 Dakota 4.8 NW 0.00 Gladstone LD18 0.00 Augusta 0.00 Freeport 0.00 Coleta 1.4 SSW 0.00 Peoria ASOS 0.00 Colchester 3.5 NE 0.00 Mount Carroll 0.00 Dallas City 3.0 SSE 0.00 Joliet 0.00 Nauvoo 0.7 SSE 0.00 Shannon 0.2 S 0.00 Quincy ASOS 0.00 St Anne 0.00 Bloomington Airport 0.00 Elizabeth 0.00 Orangeville 2.8 NW 0.00 Coal Valley 1.9 SE 0.00 Winslow 4.3 ESE 0.00 Stockton 3.4 NNE 0.00 Rochelle 0.00 Roscoe 2SE 0.00 Galesburg Arpt 3 SW 0.00 Lincoln NWS 0.00 Jacksonville AWOS 0.00 ....MISSOURI.... Kirksville ASOS 0.00 Memphis 0.00 Chillicothe 2 NW 0.00 Columbia 0.00 ....WISCONSIN.... Brodhead 1 SW 0.62 Beloit-College 0.00 Darlington 0.00 Watertown-AWOS 0.00 Allenton-WWTP .6 NW 0.00 Prairie du Chien AWOS 0.00 La Crosse WFO 0.00 Steuben 4SE 3 NE 0.00 Monroe 1 W 0.00 Madison-ASOS 0.00 Viroqua 0.00 ....MINNESOTA.... Preston 0.55
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Environmental Analysis / Other Information
SPC Convective Outlooks
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| SPC Day 1 Outlook (2000z) | SPC Day 1 Tornado Outlook (2000z) | SPC Day 1 Wind Outlook (2000z) | SPC Day 1 Hail Outlook (2000z) |
Local Sounding Analysis
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| ILX Sounding 8/20/19 12z | DVN Sounding 8/20/19 14z |
SPC Watches Issued For Our Area
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| SPC Severe Thunderstorm Watch #602 (see link for more details) |
SPC Mesoscale Discussions Issued For Our Area
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| SPC Mesoscale Discussion #1808 (see link for more details) | SPC Mesoscale Discussion #1809 (see link for more details) |
SPC - Storm Prediction Center
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