Alert archive / Illinois / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 116, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 19, 2007, 6:41 PM CDT for Ford County, Illinois. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 19, 2007, 6:41 PM CDT (23:41 UTC)
- Expired
- Aug 19, 2007, 7:18 PM CDT
- In force
- 37 min
- Issued by
- NWS Chicago, IL
- Area
- Counties, with a storm outline in the text
County Ford County, IL
The radar
The Lincoln radar (KILX), 107 km from the middle of the area, began a volume at 23:42 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 12:00Z, 11.7 hours before the alert went out and 59 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
- 1072 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1097 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 19, 3:20 PM CDT, 3 hours 21 minutes earlier.
Area forecast discussion, Aug 19, 3:20 PM CDT, 3 hours 21 minutes before
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</html>Hazardous weather outlook, Aug 19, 4:35 PM CDT, 2 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 435 PM CDT SUN AUG 19 2007 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 200930- 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- 435 PM CDT SUN AUG 19 2007 /535 PM EDT SUN AUG 19 2007/ THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE... TONIGHT A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE ENTIRE AREA. HEAVY RAIN WILL CONTINUE TONIGHT AND MAY CAUSE FLOODING...ESPECIALLY IN LOW LYING AND FLOOD PRONE AREAS AND POSSIBLY FLASH FLOODING. AN ADDITIONAL 3 INCHES OF RAIN IS POSSIBLE IN MANY LOCATIONS WITH ISOLATED AMOUNTS AS HIGH AS 5 INCHES. THUNDERSTORMS WILL ALSO BE POSSIBLE TONIGHT...BUT NO SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY A FLASH FLOOD WATCH IS IN EFFECT UNTIL 1 PM MONDAY. HEAVY RAIN WILL BE POSSIBLE MONDAY MORNING...WHICH MAY CAUSE ADDITIONAL FLOODING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS MONDAY AND MONDAY NIGHT. THE MAIN SEVERE WEATHER THREATS WILL BE DAMAGING WINDS AND LARGE HAIL. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY THROUGH SATURDAY. DUE TO THE HEAVY RAIN THAT HAS ALREADY FALLEN AND THE ADDITIONAL HEAVY RAIN EXPECTED...SEVERAL RIVERS ARE EXPECTED TO EXCEED FLOOD STAGE EARLY THIS WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED TONIGHT AND MONDAY. PLEASE REPORT RAINFALL AMOUNTS...FLOODING AND RISES ON RIVERS AND STREAMS. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-766-200930- WINTHROP HARBOR TO WILMETTE HARBOR IL- WILMETTE HARBOR TO NORTHERLY ISLAND IL- NORTHERLY ISLAND TO CALUMET HARBOR IL- CALUMET HARBOR IL TO GARY IN-GARY INDIANA TO BURNS HARBOR- BURNS HARBOR TO MICHIGAN CITY- LAKE MICHIGAN, WINTHROP HARBOR IL EASTWARD TO THE MID- POINT OF THE LAKE AND SOUTHWARD TO MICHIGAN CITY MI BEYOND 5 NM OFFSHORE- 435 PM CDT SUN AUG 19 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE... TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE...BUT NO SEVERE WEATHER IS EXPECTED. AREAS OF DENSE FOG ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS MONDAY AND MONDAY NIGHT. THE MAIN THREATS WILL BE DAMAGING WINDS AND LARGE HAIL. THERE IS A CHANCE OF THUNDERSTORMS TUESDAY THROUGH SATURDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO
In the hours before
Local storm report, Aug 19, 1:56 PM CDT, 4 hours 45 minutes before
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</html>Local storm report, Aug 19, 3:48 PM CDT, 2 hours 53 minutes before
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</html>Local storm report, Aug 19, 4:05 PM CDT, 2 hours 36 minutes before
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</html>Local storm report, Aug 19, 5:42 PM CDT, 59 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 8:26 PM CDT | Flash Flood Watch | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 41 hr |
| Aug 19, 11:45 AM CDT | Flash Flood Warning | LOT | LaSalle | 6 hr |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Winnebago | 22 hr |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Winnebago | 18 hr |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Ogle | 66 hr |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | DeKalb | 22 hr |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Boone | 8 days |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Winnebago | 11 days |
| Aug 19, 11:55 AM CDT | River Flood Warning | LOT | Winnebago | 14 days |
| Aug 19, 12:45 PM CDT | River Flood Warning | LOT | Lake | 13 days |
| Aug 19, 12:45 PM CDT | River Flood Warning | LOT | Cook | 11 days |
| Aug 19, 12:45 PM CDT | River Flood Warning | LOT | Cook | 32 hr |
| Aug 19, 3:24 PM CDT | River Flood Warning | LOT | Winnebago | 19 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2007Every severe thunderstorm warning in 2007
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.