August 25-26, 2012 Rainfall Event

An area of low pressure moved slowly across Missouri and into Central Illinois the evening of August 25 through the day August 26, spreading showers and a few thunderstorms across Southern Iowa and Northern and Central Illinois.  The slow moving nature of this event brought significant rainfall totals to the region.

Courtesy: Iowa Environmental Mesonet - Iowa State University Department of Agronomy

Here is a preliminary map of rainfall totals from this event.  Widespread rainfall amounts of a half inch to an inch and a half fell overnight Saturday night and through most of Sunday.  A band of heavier rainfall occurred from Sigourney Iowa east across the Quad Cities to around Princeton Illinois.  Amounts up to 4 inches fell in this band.  See below for some Local Storm Reports.




24 HOUR PRECIPITATION DATA IN INCHES, 
FOR EASTERN IOWA,
NORTHWEST AND WEST CENTRAL ILLINOIS,
AND NORTHEAST MISSOURI,
REPORTED BETWEEN MIDNIGHT AND 9 AM,
SUNDAY AUGUST 26, 2012.


EASTERN IOWA

Monticello 2.34
Strawberry Point 1.50
Guttenburg Dam 1.17
Oskaloosa 0.87
Keokuk LD19 0.86
Fulton 0.86
Lowden 0.73
Oskaloosa AWOS 0.64
*Asbury 0.1 WNW, IA 0.62
Dubuque Airport 0.54
Maquoketa 4W 0.53
*Delmar 2.3 NW, IA 0.53
Ottumwa ASOS 0.50
*Marengo 2.6 SSW, IA 0.48
*Montrose 3.7 W, IA 0.45
*Solon 0.3 ESE, IA 0.44
*New London 1.5 SW, IA 0.43
*Ely 0.5 SE, IA 0.43
Bloomfield 0.38
*Burlington 6.5 SSW, IA 0.38
Burlington Airport 0.37
Coggon 0.34
Waterloo ASOS 0.31
Marshalltown 0.30
*Central City 6.7 W, IA 0.30
Marshalltown ASOS 0.28
Gilman 0.28
*Marion 1.2 NE, IA 0.28
*Cedar Rapids 3.4 NW, IA 0.28
Salem 1S 0.27
Donnellson 0.27
Cedar Rapids Airport 0.27
Tripoli 0.22
*Cedar Rapids 2.1 ENE, IA 0.20
Toledo 0.19
Iowa City Airport 0.19
Grinnell AWOS 0.17
Brighton 3 N 0.17
*North Liberty 1.0 ENE, IA 0.16
Washington 0.11
Williamsburg 0.04
De Witt 4S 0.02
*Calamus 2.0 NE, IA 0.02
Davenport Airport 0.00
*Park View 0.2 WSW, IA 0.00
*Le Claire 1.8 NNE, IA 0.00
*Camanche 1.2 W, IA 0.00


NORTHWEST AND WEST CENTRAL ILLINOIS

*Warsaw 5.8 SE, IL 0.41
Bentley 0.31
*Macomb 0.6 WNW, IL 0.24
Quincy ASOS 0.17
La Harpe 0.17
Gladstone LD18 0.16
Galena 0.10
*Colchester 3.5 NE, IL 0.08
*Freeport 2.0 NW, IL 0.03
New Boston LD17 0.02
*Chadwick 2.7 WSW, IL 0.02
Mendota 0.01
Streator 0.00
Steward 0.00
St David 0.00
Roscoe 2SE 0.00
Rockford ASOS 0.00
Rochelle AWOS 0.00
Quad City Airport 0.00
Prarie City 2S 0.00
Peoria ASOS 0.00
Marshall Co-Lacon AWOS 0.00
Kewanee 1E 0.00
Jacksonville AWOS 0.00
Galesburg 0.00
Freeport WWTP 0.00
Elizabeth 0.00
Bradford 3SSE 0.00
Altona 0.00
*Winslow 4.3 ESE, IL 0.00
*Orion 4.1 NW, IL 0.00
*Morrison 3.2 E, IL 0.00
*Davis 0.5 N, IL 0.00


NORTHEAST MISSOURI

Downing 0.42
Jacksonville AWOS 0.36
Kirksville 0.32
Memphis 0.26
24 HOUR PRECIPITATION DATA IN INCHES, 
FOR EASTERN IOWA,
NORTHWEST AND WEST CENTRAL ILLINOIS,
AND NORTHEAST MISSOURI,
REPORTED BETWEEN MIDNIGHT AND 9 AM,
MONDAY AUGUST 27, 2012.


EASTERN IOWA

*Ainsworth 7.4 N, IA 3.52
*Davenport 0.9 SSW, IA 3.23
Muscatine 2N 2.73
Pella 2.60
Davenport Airport 2.46
*Muscatine 2.6 NNE, IA 2.41
Oskaloosa 2.26
*Bettendorf 2.2 SE, IA 2.23
*Eldridge 0.6 S, IA 1.71
*Le Claire 1.8 NNE, IA 1.60
Maquoketa 4W 1.57
Washington 1.43
Pella AWOS 1.28
*Park View 0.2 WSW, IA 1.20
*Burlington 6.5 SSW, IA 1.08
Lowden 0.95
Burlington Airport 0.89
Williamsburg 0.88
*Calamus 2.0 NE, IA 0.88
*Solon 0.3 ESE, IA 0.87
*New London 1.5 SW, IA 0.86
Iowa City Airport 0.84
*North Liberty 1.0 ENE, IA 0.77
*Delmar 2.3 NW, IA 0.75
Bloomfield 0.65
De Witt 4S 0.63
Dubuque LD11 0.58
*Montrose 3.7 W, IA 0.58
Dubuque Airport 0.56
Centerville 0.50
*Farmington 3.5 W, IA 0.50
*Farmington 3.5 W, IA 0.50
*Ely 0.5 SE, IA 0.45
*Asbury 0.1 WNW, IA 0.45
Oskaloosa AWOS 0.41
Cedar Rapids Airport 0.41
*Marengo 2.6 SSW, IA 0.36
Monticello 0.34
Fulton 0.34
Donnellson 0.32
*Cedar Rapids 2.1 ENE, IA 0.27
Keokuk LD19 0.26
*Marion 1.2 NE, IA 0.25
Swisher 0.24
Ottumwa ASOS 0.24
Belle Plaine 0.21
Grinnell 0.20
Coggon 0.20
*Central City 6.7 W, IA 0.20
*Cedar Rapids 3.4 NW, IA 0.20
Grinnell AWOS 0.15
Guttenburg Dam 0.13
Toledo 0.09
Strawberry Point 0.06
Stanley 0.01
Marshalltown ASOS 0.01
Waterloo ASOS 0.00
Tripoli 0.00
Marshalltown 0.00


NORTHWEST AND WEST CENTRAL ILLINOIS

Streator 3.30
Camp Grove 2SW 2.92
*New Windsor 2.0 N, IL 2.73
*Aledo 0.4 NE, IL 2.46
Kewanee 1E 2.40
St David 2.36
Bradford 3SSE 2.34
Quincy ASOS 2.20
Mendota 2.18
Aledo 2.00
Altona 1.98
Marshall Co-Lacon AWOS 1.96
*Moline 0.9 N, IL 1.93
*Reynolds 4.3 E, IL 1.88
Galesburg 1.86
*Morrison 3.2 E, IL 1.77
Quad City Airport 1.71
*Princeton 0.3 ESE, IL 1.66
*Orion 4.1 NW, IL 1.66
*Roseville 0.6 WNW, IL 1.55
Peoria ASOS 1.54
*Coal Valley 1.9 SE, IL 1.45
Augusta 1.35
*Colchester 3.5 NE, IL 1.24
*Macomb 0.6 WNW, IL 1.18
*Coleta 1.4 SSW, IL 1.11
Apple River Canyon 1.10
Quincy Dam 21 1.05
La Harpe 1.01
New Boston LD17 1.00
Roscoe 2SE 0.86
Steward 0.83
*Davis 0.5 N, IL 0.72
Freeport WWTP 0.71
*Chadwick 2.7 WSW, IL 0.69
Stockton 3NNE 0.66
Elizabeth 0.64
*Winslow 4.3 ESE, IL 0.62
Galena 0.60
Rochelle AWOS 0.48
Rockford ASOS 0.31
Bentley 0.27
Jacksonville AWOS 0.24
*Warsaw 5.8 SE, IL 0.12


NORTHEAST MISSOURI

Downing 1.35
Memphis 1.01
*Memphis 0.1 S, MO 0.91
Kirksville 0.69
*Kahoka 3.1 W, MO 0.47
Jacksonville AWOS 0.30
*Kahoka 0.6 S, MO 0.25
Canton LD20 0.16


Local Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1025 AM CDT MON AUG 27 2012

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

1200 AM HEAVY RAIN WSW LOWDEN 41.86N 90.93W
08/27/2012 M1.68 INCH CEDAR IA CO-OP OBSERVER

24 HOUR TOTAL ENDING AT MIDNIGHT. LWDI4.

1218 AM HEAVY RAIN PRINCETON 41.38N 89.47W
08/27/2012 M1.94 INCH BUREAU IL CO-OP OBSERVER

24 HOUR RAINFALL.

0500 AM HEAVY RAIN S ALEDO 41.20N 90.75W
08/27/2012 M2.00 INCH MERCER IL CO-OP OBSERVER

24 HOUR TOTAL. ALEI2.

0500 AM HEAVY RAIN 4 NNE MUSCATINE 41.47N 91.05W
08/27/2012 M2.73 INCH MUSCATINE IA CO-OP OBSERVER

24 HOUR TOTAL. MSTI4.

0500 AM HEAVY RAIN 1 NNE AUGUSTA 40.24N 90.95W
08/27/2012 M1.35 INCH HANCOCK IL CO-OP OBSERVER

24 HOUR TOTAL. AUGI2.

0500 AM HEAVY RAIN S WELLMAN 41.47N 91.84W
08/27/2012 M2.00 INCH WASHINGTON IA TRAINED SPOTTER

0600 AM HEAVY RAIN 3 E MUSCATINE 41.43N 91.01W
08/27/2012 M1.60 INCH ROCK ISLAND IL CO-OP OBSERVER

24 HOUR TOTAL. ILLINOIS CITY COOP...ILNI2.

0600 AM HEAVY RAIN 3 N TOOLESBORO 41.19N 91.06W
08/27/2012 M1.00 INCH MERCER IL CO-OP OBSERVER

24 HOUR TOTAL. NEW BOSTON COOP...NBOI2.

0600 AM HEAVY RAIN 1 S MUSCATINE 41.41N 91.07W
08/27/2012 M1.65 INCH MUSCATINE IA CO-OP OBSERVER

24 HOUR TOTAL. MCTI4.

0600 AM HEAVY RAIN 1 WSW MEMPHIS 40.46N 92.18W
08/27/2012 M1.01 INCH SCOTLAND MO CO-OP OBSERVER

24 HOUR TOTAL. MMPM7.

0630 AM HEAVY RAIN 4 SSE APPLE RIVER 42.45N 90.05W
08/27/2012 M1.10 INCH JO DAVIESS IL CO-OP OBSERVER

24 HOUR TOTAL. APLI2.

0645 AM HEAVY RAIN 4 WSW MAQUOKETA 42.05N 90.75W
08/27/2012 M1.57 INCH JACKSON IA CO-OP OBSERVER

24 HOUR TOTAL. MKTI4.

0700 AM HEAVY RAIN E LA HARPE 40.58N 90.97W
08/27/2012 M1.01 INCH HANCOCK IL CO-OP OBSERVER

24 HOUR TOTAL. LAHI2.

0700 AM HEAVY RAIN 1 SSE MANCHESTER 42.47N 91.45W
08/27/2012 M1.13 INCH DELAWARE IA CO-OP OBSERVER

24 HOUR TOTAL. MHRI4.

0700 AM HEAVY RAIN 1 E KEWANEE 41.24N 89.90W
08/27/2012 M2.40 INCH HENRY IL CO-OP OBSERVER

24 HOUR TOTAL. KEWI2.

0700 AM HEAVY RAIN 5 WSW NORTH HENDERSON 41.06N 90.57W
08/27/2012 M2.11 INCH WARREN IL CO-OP OBSERVER

24 HOUR TOTAL. ALEXIS COOP...ALXI2.

0700 AM HEAVY RAIN 1 SW MOUNT PLEASANT 40.95N 91.56W
08/27/2012 M1.65 INCH HENRY IA CO-OP OBSERVER

48 HOUR TOTAL. MPZI4.

0700 AM HEAVY RAIN 2 S BURLINGTON 40.77N 91.12W
08/27/2012 M1.64 INCH DES MOINES IA CO-OP OBSERVER

48 HOUR TOTAL. BLGI4.

0700 AM HEAVY RAIN 4 NNE DAVENPORT 41.61N 90.58W
08/27/2012 M2.65 INCH SCOTT IA CO-OP OBSERVER

24 HOUR TOTAL. NATIONAL WEATHER SERVICE OFFICE. DVNI4.

0700 AM HEAVY RAIN 1 ESE WASHINGTON 41.30N 91.68W
08/27/2012 M1.33 INCH WASHINGTON IA TRAINED SPOTTER

24 HOUR TOTAL. WA18.

0700 AM HEAVY RAIN 1 SW WASHINGTON 41.28N 91.71W
08/27/2012 M1.43 INCH WASHINGTON IA CO-OP OBSERVER

24 HOUR TOTAL. WSHI4.

0800 AM HEAVY RAIN 6 SSW BURLINGTON 40.73N 91.17W
08/27/2012 M1.08 INCH DES MOINES IA COCORAHS

0800 AM HEAVY RAIN 1 SW WALNUT 41.55N 89.60W
08/27/2012 M2.50 INCH BUREAU IL CO-OP OBSERVER

24 HOUR TOTAL. WLNI2.

0800 AM HEAVY RAIN 4 NE COLCHESTER 40.47N 90.74W
08/27/2012 M1.24 INCH MCDONOUGH IL COCORAHS

0800 AM HEAVY RAIN 2 SE COAL VALLEY 41.43N 90.42W
08/27/2012 M1.45 INCH HENRY IL COCORAHS

0800 AM HEAVY RAIN 1 WNW ROSEVILLE 40.74N 90.68W
08/27/2012 M1.55 INCH WARREN IL COCORAHS

0800 AM HEAVY RAIN NNE REYNOLDS 41.33N 90.67W
08/27/2012 M1.59 INCH ROCK ISLAND IL COCORAHS

0800 AM HEAVY RAIN ESE PRINCETON 41.38N 89.47W
08/27/2012 M1.66 INCH BUREAU IL COCORAHS

0800 AM HEAVY RAIN 4 NW ORION 41.39N 90.43W
08/27/2012 M1.66 INCH HENRY IL COCORAHS

0800 AM HEAVY RAIN 3 E MORRISON 41.81N 89.91W
08/27/2012 M1.77 INCH WHITESIDE IL COCORAHS

0800 AM HEAVY RAIN 4 E REYNOLDS 41.33N 90.60W
08/27/2012 M1.88 INCH ROCK ISLAND IL COCORAHS

0800 AM HEAVY RAIN 1 N MOLINE 41.50N 90.49W
08/27/2012 M1.93 INCH ROCK ISLAND IL COCORAHS

0800 AM HEAVY RAIN NE ALEDO 41.20N 90.75W
08/27/2012 M2.46 INCH MERCER IL COCORAHS

0800 AM HEAVY RAIN 2 N NEW WINDSOR 41.23N 90.45W
08/27/2012 M2.73 INCH MERCER IL COCORAHS

0800 AM HEAVY RAIN WSW PARK VIEW 41.69N 90.54W
08/27/2012 M1.20 INCH SCOTT IA COCORAHS

0800 AM HEAVY RAIN 2 NNE LE CLAIRE 41.63N 90.35W
08/27/2012 M1.60 INCH SCOTT IA COCORAHS

0800 AM HEAVY RAIN 1 S ELDRIDGE 41.62N 90.57W
08/27/2012 M1.71 INCH SCOTT IA COCORAHS

0800 AM HEAVY RAIN 2 SE BETTENDORF 41.54N 90.45W
08/27/2012 M2.23 INCH SCOTT IA COCORAHS

0800 AM HEAVY RAIN 3 NNE MUSCATINE 41.46N 91.05W
08/27/2012 M2.41 INCH MUSCATINE IA COCORAHS

0800 AM HEAVY RAIN 1 SSW DAVENPORT 41.54N 90.61W
08/27/2012 M3.23 INCH SCOTT IA COCORAHS

0800 AM HEAVY RAIN 7 N AINSWORTH 41.39N 91.55W
08/27/2012 M3.52 INCH WASHINGTON IA COCORAHS

0800 AM HEAVY RAIN 1 SSW COLETA 41.89N 89.81W
08/27/2012 M1.11 INCH WHITESIDE IL COCORAHS

0800 AM HEAVY RAIN 1 WNW MACOMB 40.48N 90.70W
08/27/2012 M1.18 INCH MCDONOUGH IL COCORAHS

 

 



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