Alert archive / Illinois / Special Weather Statements in 2020
Special Weather Statement, NWS Quad Cities, IA
NWS Quad Cities, IA issued this special weather statement at Sep 7, 2020, 9:01 PM CDT for Hancock County, Illinois. It was in force for 44 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 7, 2020, 9:01 PM CDT (02:01 UTC)
- Expired
- Sep 7, 2020, 9:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Quad Cities, IA
County Hancock County, IL
The radar
The Quad Cities radar (KDVN), 140 km from the middle of the area, began a volume at 02:05 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, 2.0 hours before the alert went out and 233 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
- 1489 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 329 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 10.5
The text
As transmitted.
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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 7, 6:41 PM CDT, 2 hours 20 minutes earlier.
Area forecast discussion, Sep 7, 6:41 PM CDT, 2 hours 20 minutes before
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</html>Hazardous weather outlook, Sep 7, 4:29 AM CDT, 16 hours 32 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 429 AM CDT Mon Sep 7 2020 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-080930- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 429 AM CDT Mon Sep 7 2020 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...TODAY AND TONIGHT Showers and thunderstorms are expected to develop across the outlook area this evening lingering overnight. There is a low risk of isolated large hail south of Interstate 80 this evening. Heavy rainfall of 1 to 3 inches is also possible in some locations tonight into Tuesday morning. This could pose a low risk for flash flooding in areas that received heavy rainfall over the past 24 hours. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today or tonight.
In the hours before
Local storm report, Sep 7, 6:43 PM CDT, 2 hours 18 minutes before
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</html>Special weather statement, Sep 7, 7:49 PM CDT, 1 hour 12 minutes before
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</html>Special weather statement, Sep 7, 9:01 PM CDT, 0 minutes before
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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 7, 7:49 PM CDT | Special Weather Statement | DVN | Van Buren | 41 min |
| Sep 7, 9:40 PM CDT | Special Weather Statement | DVN | Louisa, Washington | 35 min |
| Sep 7, 10:49 PM CDT | Special Weather Statement | DVN | Scott | 26 min |
| Sep 8, 2:12 AM CDT | Special Weather Statement | DVN | Des Moines | 33 min |
| Sep 8, 2:16 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 44 min |
| Sep 8, 3:31 AM CDT | Special Weather Statement | DVN | Scott | 29 min |
| Sep 7, 9:44 PM CDT | Special Weather Statement | DVN | McDonough | 46 min |
| Sep 7, 10:30 PM CDT | Special Weather Statement | DVN | McDonough | 45 min |
| Sep 8, 2:54 AM CDT | Special Weather Statement | DVN | Warren | 36 min |
| Sep 7, 9:03 PM CDT | Special Weather Statement | DVN | Scotland | 42 min |
Nearby
Special Weather Statements in Illinois, 2020Every special weather statement in 2020
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.