Alert archive / Illinois / Special Weather Statements in 2012
Special Weather Statement, NWS Quad Cities, IA
NWS Quad Cities, IA issued this special weather statement at Sep 21, 2012, 1:13 PM CDT for Louisa County, Iowa; 5 counties in Illinois. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 21, 2012, 1:13 PM CDT (18:13 UTC)
- Expired
- Sep 21, 2012, 2:15 PM CDT
- In force
- 62 min
- Issued by
- NWS Quad Cities, IA
Counties Louisa County, IA, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Warren County, IL
The radar
The Quad Cities radar (KDVN), 87 km from the middle of the area, began a volume at 18:16 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, 6.2 hours before the alert went out and 181 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2528 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this special weather statement went out at Sep 21, 11:52 AM CDT, 1 hour 21 minutes earlier.
Area forecast discussion, Sep 21, 11:52 AM CDT, 1 hour 21 minutes before
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</html>Hazardous weather outlook, Sep 21, 4:09 AM CDT, 9 hours 4 minutes before
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</html>In the hours before
Special weather statement, Sep 21, 1:13 PM CDT, 0 minutes before
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<main class="wrap">
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
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Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 2:15 PM CDT | Special Weather Statement | DVN | Scott | 60 min |
| Sep 21, 2:50 PM CDT | Freeze Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 25 hr |
Nearby
Special Weather Statements in Illinois, 2012Special Weather Statements in Iowa, 2012Every special weather statement in 2012
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.