Alert archive / Iowa / Special Weather Statements in 2021
Special Weather Statement, NWS Quad Cities, IA
NWS Quad Cities, IA issued this special weather statement at Jun 11, 2021, 2:18 PM CDT for Des Moines County, Iowa; Henderson County, Illinois. It was in force for 27 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
- Jun 11, 2021, 2:18 PM CDT (19:18 UTC)
- Expired
- Jun 11, 2021, 2:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Quad Cities, IA
Counties Des Moines County, IA, Henderson County, IL
The radar
The Quad Cities radar (KDVN), 101 km from the middle of the area, began a volume at 19:19 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, 7.3 hours before the alert went out and 105 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
- 1156 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1370 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jun 11, 1:25 PM CDT, 53 minutes earlier.
Area forecast discussion, Jun 11, 1:25 PM CDT, 53 minutes before
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</html>Hazardous weather outlook, Jun 11, 4:03 AM CDT, 10 hours 15 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 403 AM CDT Fri Jun 11 2021 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-120915- 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- 403 AM CDT Fri Jun 11 2021 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 There is a chance of thunderstorms this afternoon and tonight. The main threats from any storms will be lightning, gusty winds, and torrential downpours. It will remain hot and humid today with afternoon heat indices topping out in the mid 90s to near 100 degrees. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today or tonight.
In the hours before
Special weather statement, Jun 11, 10:38 AM CDT, 3 hours 40 minutes before
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</html>Special weather statement, Jun 11, 2:18 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 |
|---|---|---|---|---|
| Jun 11, 2:33 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 20 min |
| Jun 11, 2:26 PM CDT | Special Weather Statement | DVN | Rock Island | 34 min |
| Jun 11, 2:38 PM CDT | Special Weather Statement | DVN | Stephenson | 52 min |
| Jun 11, 4:19 PM CDT | Special Weather Statement | DVN | Whiteside | 41 min |
Nearby
Special Weather Statements in Iowa, 2021Special Weather Statements in Illinois, 2021Every special weather statement in 2021
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.