Overview
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More Information to Come (Last Updated 9/21 6PM)
An active stretch of weather was seen throughout eastern Iowa and Illinois with several rounds of thunderstorms producing heavy rain, especially for areas along and north of Interstate 80. While a few heavy rainfall events impacted parts of our forecast area throughout the week of September 14, the heaviest and most widespread event occurred late on September 19th and lasted into the 20th. Repeating rounds of strong thunderstorms, with isolated severe, moved in just prior to midnight and continued throughout the night. An anomalously moist atmosphere was in place, with our evening weather balloon measuring moisture content above the daily record! Thus, the showers and thunderstorms produced very heavy rainfall throughout our area, with the highest totals being noted along the Interstate 80 and Highway 30 corridors. In the end, areas along/north of Interstate 80 saw around 2-4" of rain, with several areas seeing 4-6" through the overnight period. This heavy rainfall resulted in flash flooding, where several creeks rose out of their banks and led to road closures. Along with the flash flooding, rises were noted along many area rivers, resulting in several locations reaching Minor Flood Stage. A few of the hardest hit locations reached Moderate to Major Flood Stage as well. Here are some notes on Dubuque, which was under a majority of the repeated rainfall rounds this past week.
For more on day to day amounts and records, visit our Climate Page. |
Rain Reports
Location Amount Time/Date Provider ...Top 10 Rainfall Reports... Cedar Rapids 5.8 N 5.68 in 0700 AM 09/20 COCORAHS MAQUOKETA 5.59 in 1008 AM 09/20 CWOP Iowa City 5.40 in 1007 AM 09/20 CWOP Elizabeth 5.04 in 0630 AM 09/20 COOP North Liberty 1.0 ENE 4.95 in 0655 AM 09/20 COCORAHS Solon 0.3 ESE 4.91 in 0700 AM 09/20 COCORAHS Ainsworth 7.4 N 4.90 in 0700 AM 09/20 COCORAHS Robins 0.8 SE 4.88 in 0700 AM 09/20 COCORAHS Swisher 4.82 in 0850 AM 09/20 COOP Solon 0.4 WNW 4.76 in 0630 AM 09/20 COCORAHS ...Illinois... ...Bureau County... Walnut 5.3 ENE 3.29 in 0700 AM 09/20 COCORAHS Princeton 1.0 SSW 2.01 in 0700 AM 09/20 COCORAHS Spring Valley Airport 1.10 in 1015 AM 09/20 AWS ...Carroll County... Lanark 5.3 N 4.21 in 0858 AM 09/20 COCORAHS Lanark 0.3 SSW 3.87 in 0500 AM 09/20 COCORAHS Lanark 6.0 E 3.48 in 0800 AM 09/20 COCORAHS ...Henry County... Colona 0.5 ESE 4.22 in 0700 AM 09/20 COCORAHS Green Rock 3.70 in 0900 AM 09/20 COCORAHS 2 SSE Osborn 3.48 in 1006 AM 09/20 CWOP Atkinson 2.6 NNE 3.41 in 0800 AM 09/20 COCORAHS New Windsor 2.0 N 2.61 in 0700 AM 09/20 COCORAHS Coal Valley 2.6 E 2.30 in 0900 AM 09/20 COCORAHS Kewanee 1 E 1.82 in 0700 AM 09/20 COOP Galva 1.26 in 0800 AM 09/20 COCORAHS Galva 2.7 NE 1.13 in 0600 AM 09/20 COCORAHS ...Jo Daviess County... Elizabeth 5.04 in 0630 AM 09/20 COOP Hanover 0.2 NW 4.34 in 0700 AM 09/20 COCORAHS East Dubuque 1.7 SE 3.90 in 0700 AM 09/20 COCORAHS Stockton 3.4 NNE 3.76 in 0700 AM 09/20 COCORAHS Stockton 3 Nne 3.74 in 0700 AM 09/20 COOP Mount Carroll 3.64 in 1000 AM 09/20 CWOP Stockton 3.51 in 1000 AM 09/20 CWOP Middleburg 3.42 in 1000 AM 09/20 CWOP Galena 0.8 WSW 2.83 in 0700 AM 09/20 COCORAHS ...Mercer County... Viola 0.4 E 3.06 in 0700 AM 09/20 COCORAHS Aledo 2.93 in 0800 AM 09/20 COOP Illinois City 6.7 NW 2.35 in 0700 AM 09/20 COCORAHS 0.9 W Keithsburg 1.30 in 0930 AM 09/20 HADS ...Rock Island County... Moline 0.7 NNE 4.46 in 0700 AM 09/20 COCORAHS 1 NNW Fruitland 3.85 in 0814 AM 09/20 COCORAHS Illinois City 6.7 SW 3.40 in 0800 AM 09/20 COCORAHS Milan 2.82 in 1008 AM 09/20 CWOP Taylor Ridge 1.1 N 2.73 in 0900 AM 09/20 COCORAHS SILVIS 2.68 in 1006 AM 09/20 CWOP 0.9 E Fairport 2.52 in 0930 AM 09/20 HADS Moline 0.8 NNW 2.30 in 0751 AM 09/20 COCORAHS Quad City Intl Arpt 2.20 in 0952 AM 09/20 ASOS 2.9 N Rock Island 2.13 in 1000 AM 09/20 HADS 2.9 E Muscatine 1.76 in 1000 AM 09/20 HADS 0.8 N Moline Quad-City Airpo 1.67 in 0930 AM 09/20 HADS ...Stephenson County... Lena 0.3 SSE 3.62 in 0600 AM 09/20 COCORAHS Davis 0.5 N 3.61 in 0904 AM 09/20 COCORAHS Freeport 2.96 in 1010 AM 09/20 CWOP Freeport 4.3 W 2.81 in 0500 AM 09/20 COCORAHS Freeport Arpt 2.15 in 1015 AM 09/20 AWOS ...Whiteside County... Morrison 3.2 E 4.45 in 0700 AM 09/20 COCORAHS Sterling 5.9 NNE 4.25 in 0700 AM 09/20 COCORAHS Prophetstown 0.2 SW 4.00 in 1000 AM 09/20 COCORAHS Coleta 1.4 SSW 3.83 in 0700 AM 09/20 COCORAHS Sterling 3.09 in 1010 AM 09/20 CWOP Dam 13 2.81 in 1000 AM 09/20 HADS Sterling 4.9 WSW 2.63 in 0700 AM 09/20 COCORAHS Sterling/Rock Falls Arpt 2.49 in 1003 AM 09/20 AWOS ...Iowa... ...Benton County... Van Horne 2.1 NNW 4.21 in 0700 AM 09/20 COCORAHS Vinton 4.09 in 0800 AM 09/20 COOP SHELLSBURG 3.78 in 1005 AM 09/20 CWOP MOUNT AUBURN 3.00 in 1010 AM 09/20 CWOP Mount Auburn 0.1 SSW 2.94 in 0600 AM 09/20 COCORAHS 1 NE Watkins 2.52 in 1010 AM 09/20 AWS 2 ENE Dysart 2.42 in 1010 AM 09/20 AWS Urbana 1.43 in 1000 AM 09/20 CWOP Iowa River 1.05 in 0900 AM 09/20 HADS ...Buchanan County... Independence 2.17 in 0930 AM 09/20 CWOP Winthrop 5.6 NNE 2.10 in 0930 AM 09/20 COCORAHS Independence 0.9 WNW 2.00 in 0700 AM 09/20 COCORAHS Aurora 1.92 in 0945 AM 09/20 CWOP Independence 2.1 NNE 1.61 in 0705 AM 09/20 COCORAHS Fairbank 1.25 in 1001 AM 09/20 CWOP Independence 1.09 in 1000 AM 09/20 CWOP Independence 1.07 in 0930 AM 09/20 HADS ...Cedar County... Tipton 0.3 ESE 3.56 in 0700 AM 09/20 COCORAHS ...Clinton County... Camanche 1.2 W 4.69 in 0700 AM 09/20 COCORAHS Charlotte 1.9 WNW 4.07 in 0700 AM 09/20 COCORAHS Clinton 1.3 NNE 3.47 in 0700 AM 09/20 COCORAHS De Witt 5.4 ENE 3.46 in 0700 AM 09/20 COCORAHS Calamus 2.0 NE 3.44 in 0700 AM 09/20 COCORAHS WHEATLAND 2.86 in 1010 AM 09/20 CWOP ...Delaware County... Hopkinton 5.4 WSW 3.75 in 0700 AM 09/20 COCORAHS MANCHESTER 3.27 in 1008 AM 09/20 CWOP MANCHESTER 2.81 in 1000 AM 09/20 CWOP Manchester 2.58 in 0700 AM 09/20 COOP 2 NNW Manchester Airport 2.39 in 1010 AM 09/20 AWS 1 NE Dundee 1.79 in 0700 AM 09/20 COCORAHS ...Des Moines County... 2 WSW Yarmouth 2.01 in 0700 AM 09/20 COCORAHS Danville 2.9 W 1.10 in 0700 AM 09/20 COCORAHS ...Dubuque County... Bellevue 12.2 NW 4.53 in 0750 AM 09/20 COCORAHS Dubuque 1.0 SE 4.23 in 0650 AM 09/20 COCORAHS Asbury 0.4 SW 4.16 in 0700 AM 09/20 COCORAHS Dubuque 1.4 WNW 3.91 in 0700 AM 09/20 COCORAHS Dubuque Arpt 3.63 in 0953 AM 09/20 ASOS 1.8 NW East Dubuque 3.01 in 1000 AM 09/20 HADS Dubuque 7 SSW 3.00 in 0700 AM 09/20 COOP Waupeton 2.66 in 0945 AM 09/20 HADS Dubuque 2.31 in 0956 AM 09/20 CWOP Gordons Ferry 2.20 in 0945 AM 09/20 HADS Dubuque 1.97 in 1009 AM 09/20 CWOP ...Henry County... Mount Union 3.6 S 1.87 in 0900 AM 09/20 COCORAHS ...Iowa County... North English 3.28 in 0700 AM 09/20 COOP Marengo 2.6 SSW 2.67 in 0700 AM 09/20 COCORAHS Amana 2.37 in 1000 AM 09/20 CWOP Parnell 0.1 SSW 2.30 in 0557 AM 09/20 COCORAHS Williamsburg 0.6 SW 2.05 in 0800 AM 09/20 COCORAHS 1 E Williamsburg 1.57 in 0700 AM 09/20 COOP 4.0 S Parnell 1.30 in 1000 AM 09/20 HADS ...Jackson County... MAQUOKETA 5.59 in 1008 AM 09/20 CWOP Bellevue 3.28 in 1000 AM 09/20 HADS ...Johnson County... Iowa City 5.40 in 1007 AM 09/20 CWOP North Liberty 1.0 ENE 4.95 in 0655 AM 09/20 COCORAHS Solon 0.3 ESE 4.91 in 0700 AM 09/20 COCORAHS Swisher 4.82 in 0850 AM 09/20 COOP Solon 0.4 WNW 4.76 in 0630 AM 09/20 COCORAHS Iowa City 1.0 NE 4.74 in 0700 AM 09/20 COCORAHS Iowa City 4.70 in 0700 AM 09/20 COOP West Branch 2.3 SSW 4.68 in 0825 AM 09/20 COCORAHS Iowa City 2.7 E 4.68 in 0701 AM 09/20 COCORAHS Iowa City 3.7 E 4.58 in 0700 AM 09/20 COCORAHS West Branch 2.0 NNW 4.37 in 0700 AM 09/20 COCORAHS University Heights 4.33 in 0700 AM 09/20 COCORAHS Iowa City 1.2 WSW 4.25 in 0800 AM 09/20 COCORAHS Iowa City 1.5 NNE 4.19 in 0715 AM 09/20 COCORAHS Riverside 4.04 in 1006 AM 09/20 CWOP Iowa City 2.8 WSW 3.94 in 0700 AM 09/20 COCORAHS North Liberty 0.7 SSW 3.92 in 0700 AM 09/20 COCORAHS Iowa City 1.4 NNE 3.78 in 0800 AM 09/20 COCORAHS Coralville 1.3 SE 3.66 in 0720 AM 09/20 COCORAHS Coralville 1.7 SSE 3.54 in 0700 AM 09/20 COCORAHS IOWA CITY 3.49 in 1008 AM 09/20 CWOP North Liberty 0.5 NW 2.75 in 0700 AM 09/20 COCORAHS Iowa City 2.50 in 1005 AM 09/20 CWOP Clear Crk At Coralville 2.44 in 1000 AM 09/20 HADS Iowa City 1.5 ENE 2.35 in 0700 AM 09/20 COCORAHS Iowa City 0.9 SW 2.20 in 0900 AM 09/20 COCORAHS Iowa City 1.3 ESE 2.16 in 0830 AM 09/20 COCORAHS 2.5 SW Newport 1.88 in 1000 AM 09/20 HADS 4.0 N Iowa City 1.30 in 1000 AM 09/20 HADS ...Jones County... Anamosa 3 SSW 4.46 in 0700 AM 09/20 COOP Wapsipinicon River 4.19 in 0800 AM 09/20 HADS Center Junction 2.6 W 3.97 in 0800 AM 09/20 COCORAHS Livermore 3.90 in 1000 AM 09/20 CWOP Monticello 2.42 in 0800 AM 09/20 COOP Wapsipinicon River 2.36 in 0915 AM 09/20 HADS Anamosa 0.6 ESE 2.15 in 0900 AM 09/20 COCORAHS ...Keokuk County... Sigourney 1.90 in 0600 AM 09/20 COOP ...Linn County... Cedar Rapids 5.8 N 5.68 in 0700 AM 09/20 COCORAHS Robins 0.8 SE 4.88 in 0700 AM 09/20 COCORAHS Cedar Rapids 2.1 NW 4.74 in 0915 AM 09/20 COCORAHS Marion 1.6 WNW 4.67 in 0700 AM 09/20 COCORAHS Cedar Rapids 4.1 NW 4.53 in 0600 AM 09/20 COCORAHS Marion 1.7 NNW 4.48 in 0733 AM 09/20 COCORAHS Ely 0.5 SE 4.41 in 0715 AM 09/20 COCORAHS Cedar Rapids 2.7 NE 4.40 in 0550 AM 09/20 COCORAHS Marion 4.40 in 0700 AM 09/20 COCORAHS Marion 3.2 N 4.30 in 0700 AM 09/20 COCORAHS Cedar Rapids 3.62 in 1008 AM 09/20 CWOP Marion 3.42 in 1005 AM 09/20 CWOP Coggon 0.3 ENE 3.23 in 0700 AM 09/20 COCORAHS Center Point 0.6 NNW 2.82 in 0600 AM 09/20 COCORAHS Center Point 2.78 in 0800 AM 09/20 COCORAHS Central City 6.7 W 2.67 in 0800 AM 09/20 COCORAHS CENTRAL CITY 2.49 in 1010 AM 09/20 CWOP ...Louisa County... Wapello 5.4 SE 2.22 in 0700 AM 09/20 COCORAHS Morning Sun 1.7 E 1.92 in 0800 AM 09/20 COCORAHS ...Muscatine County... 2 N Muscatine 4.58 in 0700 AM 09/20 COOP Cedar River Tnc Swamp 4.09 in 0946 AM 09/20 RAWS Nichols 3.6 WSW 3.65 in 0700 AM 09/20 COCORAHS ...Scott County... Eldridge 0.7 SSW 4.75 in 0800 AM 09/20 COCORAHS BETTENDORF 4.64 in 1010 AM 09/20 CWOP 3.9 S Dewitt 4.21 in 0930 AM 09/20 HADS Davenport 0.9 WNW 4.20 in 0700 AM 09/20 COCORAHS 1 NE Pleasant Valley 4.20 in 0700 AM 09/20 COCORAHS BETTENDORF 3.93 in 1006 AM 09/20 CWOP Davenport 3.84 in 1000 AM 09/20 CWOP Bettendorf 2.4 ENE 3.82 in 0730 AM 09/20 COCORAHS 3 S Mount Joy 3.74 in 1010 AM 09/20 AWS BETTENDORF 3.62 in 1000 AM 09/20 CWOP Davenport 6 N 3.57 in 0700 AM 09/20 COOP Davenport 4.3 NE 3.56 in 0700 AM 09/20 COCORAHS LECLAIRE 3.20 in 1000 AM 09/20 CWOP Flagstaff Cheshire 3.00 in 0946 AM 09/20 CWOP Eldridge 2.88 in 1007 AM 09/20 CWOP BETTENDORF 2.69 in 1000 AM 09/20 CWOP ...Washington County... Ainsworth 7.4 N 4.90 in 0700 AM 09/20 COCORAHS Kalona 2.6 WSW 3.99 in 0700 AM 09/20 COCORAHS Wellman 4.0 E 3.69 in 0700 AM 09/20 COCORAHS Washington 6.5 W 2.20 in 0700 AM 09/20 COCORAHS Washington 2 SSW 2.17 in 0700 AM 09/20 COOP Washington 1.75 in 1015 AM 09/20 AWS
Flooding
Hydrographs - Still to Come
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Photos & Video - More to Come
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Dry Creek in Cedar Rapids, IA Courtesy of Gregg Alliss |
Dry Creek in Cedar Rapids, IA Courtesy of Gregg Alliss |
Dry Creek in Cedar Rapids, IA Courtesy of Gregg Alliss |
Environment
Synoptic Summary
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| 09/20 06z - 500 mb Analysis | 09/20 06z - 700 mb Analysis | 09/20 06z - 850 mb Analysis | 09/20 06z - 925 mb Analysis |
Mesoscale Environment
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| 06z - Moisture Convergence | 06z - Precipitable Water | 06z - Effective Shear | 06z - MUCAPE |
Weather Prediction Center Mesoscale Precipitation Discussions
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| MPD 1336 | MPD 1339 | MPD 1341 |
Additional Information
Other NWS Summaries
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Media use of NWS Web News Stories is encouraged! Please acknowledge the NWS as the source of any news information accessed from this site. |
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