A cold front will push south across the Western U.S. into Tuesday with mountain snow and areas of gusty to high winds. An area of low pressure will form along this front on Tuesday and bring a potential for severe thunderstorms with tornadoes and excessive rainfall in the lower to mid Mississippi River Valley. To the north, heavy snow is possible in parts of the upper Midwest. Read More >
Overview
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Fast Facts:
For detailed information about this event, see Analysis of the August 12, 2021, Flash flood in and near Gibson City, IL, a NWS Technical Paper detailing the rainfall, flooding, and impacts. |
.png) Event summary information |
Rainfall and Storm Reports
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| Gridded Radar-Estimate Rainfall showing pockets of 8 to 9 inches of rain near Gibson City. |
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| Gridded Radar-Estimate Average Recurrence Interval (ARI). |
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS..
0902 AM HAIL GIBSON CITY 40.46N 88.38W
08/12/2021 M0.75 INCH FORD IL BROADCAST MEDIA
ALSO ESTIMATED WIND GUSTS OF 40 MPH.
1044 AM FLASH FLOOD GIBSON CITY 40.46N 88.38W
08/12/2021 FORD IL BROADCAST MEDIA
PARTS OF ROUTE 9 AND ROUTE 47 HAVE A FOOT OF
WATER ON THEM IN AND AROUND GIBSON CITY.
MULTIPLE CARS STALLED IN WATER.
1158 AM FLASH FLOOD 1 S GIBSON CITY 40.46N 88.38W
08/12/2021 FORD IL BROADCAST MEDIA
NUMEROUS CITY ROADS WITH 2-3 FEET OF WATER
IN GIBSON CITY, WITH HOMES BEGINNING TO TAKE
ON WATER IN PARTS OF TOWN. MULTIPLE ROADS
ARE CLOSED.
1251 PM FLASH FLOOD 1 S GIBSON CITY 40.46N 88.38W
08/12/2021 FORD IL EMERGENCY MNGR
SIGNIFICANT FLASH FLOODING OCCURRING IN AND
AROUND GIBSON CITY, AND POINTS SOUTH AND
WEST. WATER IS INUNDATING HOMES AND
BUSINESSES, SEWERS ARE BACKING UP, AND ALL
ROADS ARE IMPASSABLE. NUMEROUS WATER RESCUES
CONTINUE.
0214 PM FLASH FLOOD 1 SE GIBSON CITY 40.46N 88.37W
08/12/2021 FORD IL EMERGENCY MNGR
WATER RESCUES CONTINUE AT A SENIOR CITIZENS
CENTER THAT WAS INUNDATED WITH WATER. MOST
ROADWAYS REMAIN IMPASSABLE.
1159 PM HEAVY RAIN SIBLEY 40.59N 88.38W
08/12/2021 M2.49 INCH FORD IL MESONET
PERSONAL WEATHER STATION ONE-DAY TOTAL
KILSIBLE9.
1159 PM HEAVY RAIN 1 NE GIBSON CITY 40.47N 88.37W
08/12/2021 M9.33 INCH FORD IL MESONET
PERSONAL WEATHER STATION KILGIBSO9 ONE-DAY
TOTAL.
&&
$$
Photos
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| Gibson City (Andrew Pritchard) |
Gibson City junction of Highways 47, 9, and 54 (Andrew Pritchard) |
Gibson City (Andrew Pritchard) |
Environment
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| SPC mesoanalysis of 925 mb dewpoints, showing high levels of moisture pooled along and south of I-80. | SPC mesoanalysis of Precipitable Water (PWAT) values. High values over 1.6" were present over Ford County, indicative of a very moist airmass. | SPC Mesoanalysis of "Upwind Propagation Vectors" showing slow or near-zero net storm motion, indicating a potential for training thunderstorms. |
Additional Info
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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. Additional recaps can be found on the NWS Chicago Past Events Page |
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