Alert archive / Illinois / Flash Flood Warnings in 2008
Flash Flood Warning 22, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Sep 13, 2008, 3:34 AM CDT for 4 counties in Illinois. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 13, 2008, 3:34 AM CDT (08:34 UTC)
- Expired
- Sep 13, 2008, 7:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cook County, IL, DuPage County, IL, Kane County, IL, Will County, IL
The radar
The Chicago radar (KLOT), 20 km from the middle of the area, began a volume at 08:37 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 8.6 hours before the alert went out and 188 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
- 197 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before this flash flood warning went out at Sep 13, 2:27 AM CDT, 1 hour 7 minutes earlier.
Area forecast discussion, Sep 13, 2:27 AM CDT, 1 hour 7 minutes before
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</html>Hazardous weather outlook, Sep 12, 11:06 PM CDT, 4 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1106 PM CDT FRI SEP 12 2008 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 140415- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 1106 PM CDT FRI SEP 12 2008 /1206 AM EDT SAT SEP 13 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...OVERNIGHT. WEATHER HAZARDS EXPECTED: ISOLATED THUNDERSTORMS...WITH AN ISOLATED TORNADO POSSIBLE. HEAVY RAINFALL RESULTING IN LOCALIZED FLOODING. AREAS AFFECTED AND TIMING: HEAVY RAINFALL AND LOCALIZED FLOODING ARE POSSIBLE TONIGHT...PARTICULARLY NORTH OF INTERSTATE 80. ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE OUTLOOK AREA TONIGHT...WIDESPREAD SEVERE WEATHER IS NOT EXPECTED...HOWEVER AN ISOLATED TORNADO CANNOT BE RULED OUT. DISCUSSION: WIDESPREAD RAIN WILL GRADUALLY INCREASE IN INTENSITY BY LATE EVENING AND ESPECIALLY INTO THE OVERNIGHT HOURS AS STRENGTHENING SOUTH WINDS IN THE LOW LEVELS OF THE ATMOSPHERE TRANSPORT MORE MOISTURE INTO NORTHERN ILLINOIS AND NORTHWEST INDIANA. THERE IS A POTENTIAL OF HEAVY RAIN OVERNIGHT...WITH THE GREATEST POTENTIAL OF HEAVY RAIN NORTH OF INTERSTATE 80. SOME LOCALIZED FLOODING IS POSSIBLE. ISOLATED THUNDERSTORMS ALONG THE SOUTHERN EDGE OF THE ADVANCING SHIELD OF RAIN SHIELD MAY LINGER INTO THE OVERNIGHT HOURS MOVING SLOWLY NORTHWARD...AND AFFECTING AREAS MAINLY SOUTH OF INTERSTATE 80. DESPITE VERY WEAK INSTABILITY...STRONG WIND SHEAR COULD BE ENOUGH TO ALLOW FOR AN ISOLATED TORNADO OR TWO OVERNIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. RAIN...HEAVY AT TIMES...WILL LIKELY CONTINUE INTO THE EARLY MORNING HOURS ON SATURDAY ACROSS FAR NORTHERN ILLINOIS. THE COVERAGE OF THE RAIN WILL LIKELY DIMINISH TOWARD MIDDAY. HOWEVER...CONDITIONS WILL BECOME MORE UNSTABLE SATURDAY AFTERNOON AS A COLD FRONT APPROACHES. DEPENDING ON HOW MUCH LOW LEVEL WARMING CAN OCCUR SATURDAY AFTERNOON...THERE IS A POTENTIAL FOR A FEW OF THE THUNDERSTORMS TO BE SEVERE SATURDAY AFTERNOON INTO EARLY EVENING...MAINLY SOUTH OF INTERSTATE 80. THE MAIN THREATS WILL BE DAMAGING WINDS AND THE POTENTIAL FOR AN ISOLATED TORNADO. IN ADDITION...THE REMNANTS OF HURRICANE IKE ARE FORECAST TO BRING ADDITIONAL HEAVY RAINFALL TO PORTIONS OF THE AREA SATURDAY NIGHT OR SUNDAY. SHOULD THIS HEAVY RAINFALL OCCUR...THEN THERE WOULD LIKELY BE A THREAT OF FLOODING OF LOW LYING AND FLOOD PRONE AREAS. AREA RIVERS AND STREAMS WILL ALSO LIKELY RISE IN RESPONSE TO THE HEAVY RAIN. .SPOTTER INFORMATION STATEMENT... THERE IS AN OUTSIDE CHANCE THAT SPOTTERS COULD BE NEEDED...MAINLY SOUTH OR INTERSTATE 80. ALSO...SPOTTERS AND OBSERVERS ARE ASKED TO RELAY REPORTS OF HEAVY RAINFALL TO THE NATIONAL WEATHER SERVICE. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-140415- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 1106 PM CDT FRI SEP 12 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...OVERNIGHT. THERE IS A CHANCE OF A THUNDERSTORM...MAINLY OVERNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THUNDERSTORMS ARE POSSIBLE AGAIN SATURDAY. HAZARDOUS WINDS AND WAVES FOR SMALL CRAFT ARE POSSIBLE SUNDAY NIGHT AND MONDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-140415- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TOW RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 1106 PM CDT FRI SEP 12 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...OVERNIGHT. THERE IS A CHANCE OF THUNDERSTORMS OVER SOUTHERN PORTIONS OF THE LAKE...MAINLY OVERNIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THUNDERSTORMS ARE POSSIBLE SATURDAY...ESPECIALLY OVER SOUTHERN PORTIONS OF THE LAKE. GUSTS APPROACHING GALE FORCE ARE POSSIBLE ACROSS LAKE MICHIGAN SUNDAY AFTERNOON INTO SUNDAY EVENING. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO IZZI
In the hours before
Local storm report, Sep 13, 1:33 AM CDT, 2 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
133 AM CDT SAT SEP 13 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0115 AM FLASH FLOOD 1 S STREATOR 41.11N 88.83W
09/13/2008 LIVINGSTON IL LAW ENFORCEMENT
BLOOMINGTON ROAD CLOSED IN SOUTH STREATOR DUE TO
FLOODING.
0115 AM FLASH FLOOD 4 NNE LONG POINT 41.06N 88.86W
09/13/2008 LIVINGSTON IL LAW ENFORCEMENT
ROAD 375E CLOSED NEAR ROUTE 17 DUE TO FLOODING.
&&Local storm report, Sep 13, 1:54 AM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
154 AM CDT SAT SEP 13 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 AM FLASH FLOOD MATTESON 41.51N 87.74W
09/13/2008 COOK IL LAW ENFORCEMENT
GOVERNORS HIGHWAY CLOSED DUE TO FLOODING.
&&The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 8:26 PM CDT | River Flood Advisory | LOT | Boone | 20 hr |
| Sep 12, 9:17 PM CDT | River Flood Warning | LOT | Cook | 5 days |
| Sep 12, 9:17 PM CDT | River Flood Warning | LOT | Cook | 6 days |
| Sep 12, 9:34 PM CDT | River Flood Advisory | LOT | Bureau, LaSalle | 15 hr |
| Sep 12, 11:30 PM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle, Livingston | 6 hr |
| Sep 13, 12:38 AM CDT | Tornado Warning | LOT | Grundy, Livingston | 37 min |
| Sep 13, 1:28 AM CDT | Flash Flood Warning | LOT | Cook, Grundy, Kankakee, Kendall, LaSalle, Livingston and 1 more | 6 hr |
| Sep 13, 2:12 AM CDT | Flash Flood Warning | LOT | DeKalb, Kane, Kendall, LaSalle, Lee | 3 hr |
| Sep 13, 3:46 AM CDT | River Flood Warning | LOT | Cook | 4 days |
| Sep 13, 4:29 AM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Grundy, Kane, Kendall, LaSalle and 4 more | 1 min |
| Sep 13, 4:33 AM CDT | Flash Flood Warning | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 7 more | 6 hr |
| Sep 13, 5:26 AM CDT | Flash Flood Warning | LOT | Cook, Kane, Lake, McHenry | 5 hr |
| Sep 13, 7:26 AM CDT | Flash Flood Warning | LOT | Cook, Grundy, Kankakee, Kendall, LaSalle, Livingston and 1 more | 3 hr |
| Sep 13, 7:35 AM CDT | Flash Flood Warning | LOT | Cook, DuPage, Kane, Will | 3 hr |
| Sep 13, 8:57 AM CDT | River Flood Warning | LOT | Cook | 4 days |
| Sep 13, 10:11 AM CDT | Areal Flood Warning | LOT | Cook, Will | 19 hr |
| Sep 13, 10:29 AM CDT | Flash Flood Warning | LOT | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 5 more | 6 hr |
| Sep 13, 10:58 AM CDT | River Flood Watch | LOT | Winnebago | 5 hr |
| Sep 13, 10:58 AM CDT | River Flood Watch | LOT | DeKalb | 5 hr |
| Sep 13, 11:21 AM CDT | River Flood Warning | LOT | LaSalle | 5 days |
| Sep 13, 12:16 PM CDT | River Flood Warning | LOT | Grundy | 6 days |
| Sep 13, 12:16 PM CDT | River Flood Warning | LOT | Bureau, LaSalle | 16 days |
| Sep 13, 3:53 PM CDT | River Flood Warning | LOT | Boone | 18 hr |
| Sep 13, 3:53 PM CDT | River Flood Warning | LOT | Winnebago | 29 hr |
| Sep 13, 3:53 PM CDT | River Flood Warning | LOT | DeKalb | 65 hr |
| Sep 13, 4:19 PM CDT | Small Craft Advisory | LOT | 51 hr | |
| Sep 13, 4:20 PM CDT | Lakeshore Flood Statement | LOT | Lake | 51 hr |
| Sep 13, 4:30 PM CDT | Areal Flood Warning | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 7 more | 13 hr |
| Sep 13, 4:48 PM CDT | River Flood Warning | LOT | Kankakee | 12 days |
| Sep 13, 4:48 PM CDT | River Flood Warning | LOT | Grundy, Will | 4 days |
| Sep 13, 4:48 PM CDT | River Flood Warning | LOT | LaSalle | 4 days |
| Sep 13, 3:46 AM CDT | River Flood Warning | LOT | Lake | 7 days |
| Sep 13, 4:14 AM CDT | Flash Flood Warning | LOT | Porter | 3 hr |
| Sep 13, 4:48 PM CDT | River Flood Warning | LOT | Lake, Newton | 19 days |
Nearby
Flash Flood Warnings in Illinois, 2008Every flash flood warning in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.