Alert archive / Illinois / Flash Flood Warnings in 2006
Flash Flood Warning 12, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Aug 25, 2006, 4:49 PM CDT for Winnebago County, Illinois. It was in force for 116 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 25, 2006, 4:49 PM CDT (21:49 UTC)
- Expired
- Aug 25, 2006, 6:45 PM CDT
- In force
- 116 min
- Issued by
- NWS Chicago, IL
- Area
- Counties, with a storm outline in the text
County Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 86 km from the middle of the area, began a volume at 21:49 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
Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 136 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
- 685 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 1278 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 Aug 24, 6:35 PM CDT, 22 hours 14 minutes earlier.
Area forecast discussion, Aug 24, 6:35 PM CDT, 22 hours 14 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 25, 2:17 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 58 min |
| Aug 25, 3:30 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb | 45 min |
| Aug 25, 3:52 PM CDT | Severe Thunderstorm Warning | LOT | Kane | 28 min |
| Aug 25, 4:30 PM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 24 min |
| Aug 25, 6:00 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Ogle | 38 min |
Nearby
Flash Flood Warnings in Illinois, 2006Every flash flood warning in 2006
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.