Alert archive / Illinois / Flash Flood Warnings in 2014
Flash Flood Warning 21, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Aug 1, 2014, 8:05 PM CDT for Ogle County, Winnebago County, Illinois. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 1, 2014, 8:05 PM CDT (01:05 UTC)
- Expired
- Aug 2, 2014, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Ogle County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 90 km from the middle of the area, began a volume at 01:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 1, 9:00 PM CDT | HEAVY RAIN 1.35 | Rockford Airport, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.1 hours before the alert went out and 139 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 722 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1694 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
596 WGUS53 KLOT 020105 FFWLOT ILC141-201-020700- /O.NEW.KLOT.FF.W.0021.140802T0105Z-140802T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 805 PM CDT FRI AUG 1 2014 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN OGLE COUNTY IN NORTH CENTRAL ILLINOIS... SOUTHEASTERN WINNEBAGO COUNTY IN NORTH CENTRAL ILLINOIS... * UNTIL 200 AM CDT * AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES THAT IN EXCESS OF TWO INCHES OF RAIN HAS FALLEN IN PARTS OF THE WARNING AREA. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... ROCKFORD...ROCKFORD AIRPORT AND CHERRY VALLEY. ROCKFORD POLICE DEPARTMENT REPORTED UP TO ONE FOOT OF STANDING WATER ON SOME ROADS IN ROCKFORD. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 4232 8894 4211 8894 4212 8918 4233 8918 $$ RC
2 follow-up statements
027 WGUS73 KLOT 020207 FFSLOT FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 907 PM CDT FRI AUG 1 2014 ILC141-201-020700- /O.CON.KLOT.FF.W.0021.000000T0000Z-140802T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OGLE IL-WINNEBAGO IL- 907 PM CDT FRI AUG 1 2014 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WINNEBAGO AND NORTHEASTERN OGLE COUNTIES UNTIL 200 AM CDT... RADAR INDICATES THAT SOME AREAS MAY HAVE SEEN SLIGHTLY IN EXCESS OF TWO INCHES OF RAIN IN THUNDERSTORMS THAT HAVE NOW MOVED SOUTH OF THE WARNED AREA. EMERGENCY MANAGERS AND LAW ENFORCEMENT REPORTED THAT MINOR FLOODING WAS OCCURRING ON MANY ROADS IN THE CENTER OF ROCKFORD BETWEEN 8 PM AND 830 PM. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ROCKFORD... ROCKFORD AIRPORT AND CHERRY VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 4232 8894 4211 8894 4212 8918 4233 8918 $$ RC
117 WGUS73 KLOT 020258 FFSLOT FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 958 PM CDT FRI AUG 1 2014 ILC141-201-020313- /O.CAN.KLOT.FF.W.0021.000000T0000Z-140802T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OGLE IL-WINNEBAGO IL- 958 PM CDT FRI AUG 1 2014 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN WINNEBAGO AND NORTHEASTERN OGLE COUNTIES IS CANCELLED... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. && LAT...LON 4232 8894 4211 8894 4212 8918 4233 8918 $$ RC
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:19 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 7 min |
| Aug 1, 7:24 PM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 21 min |
| Aug 1, 7:30 PM CDT | Areal Flood Advisory | LOT | Ogle, Winnebago | 6 hr |
| Aug 1, 7:55 PM CDT | Areal Flood Advisory | LOT | Boone, Lake, McHenry | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.