Alert archive / Iowa / Areal Flood Advisories in 2021
Areal Flood Advisory 4, NWS La Crosse, WI
NWS La Crosse, WI issued this areal flood advisory at Jun 25, 2021, 4:48 PM CDT for Chickasaw County, Floyd County, Iowa. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 25, 2021, 4:48 PM CDT (21:48 UTC)
- Expired
- Jun 25, 2021, 7:00 PM CDT
- In force
- 2 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
Counties Chickasaw County, IA, Floyd County, IA
The radar
The La Crosse radar (KARX), 139 km from the middle of the area, began a volume at 21:48 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 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
- 22 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before this areal flood advisory went out at Jun 25, 2:52 PM CDT, 1 hour 56 minutes earlier.
Area forecast discussion, Jun 25, 2:52 PM CDT, 1 hour 56 minutes before
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</html>Hazardous weather outlook, Jun 25, 3:15 PM CDT, 1 hour 33 minutes before
Hazardous Weather Outlook National Weather Service La Crosse WI 315 PM CDT Fri Jun 25 2021 IAZ029-030-WIZ061-262015- Fayette-Clayton-Grant- 315 PM CDT Fri Jun 25 2021 This Hazardous Weather Outlook is for portions of northeast Iowa and southwest Wisconsin. .DAY ONE...This Afternoon and Tonight Scattered thunderstorms are expected this afternoon and evening. In addition, funnel clouds will be possible this afternoon. These funnel clouds normally do not touch the ground. As a result, they rarely do any damage and last only a few minutes. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Thunderstorms will be possible on Saturday and Saturday night. A few of these storms may become strong to severe during the afternoon and evening. Large hail, damaging winds, and heavy rain will be the primary threats. An isolated tornado or two will also be possible. Periodic chances of thunderstorms will continue then into Wednesday. At this time, it is too early to determine if organized severe weather will occur. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed on Saturday afternoon and evening. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ009>011-018-019-MNZ096-WIZ041>044-053>055-262015- Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Houston-La Crosse- Monroe-Juneau-Adams-Vernon-Crawford-Richland- 315 PM CDT Fri Jun 25 2021 This Hazardous Weather Outlook is for portions of north central Iowa...northeast Iowa...southeast Minnesota...central Wisconsin... southwest Wisconsin and west central Wisconsin. .DAY ONE...This Afternoon and Tonight Scattered thunderstorms are possible this afternoon and evening, mainly across northeastern Iowa and southwestern Wisconsin. The overall threat for severe weather is low at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Thunderstorms will be possible on Saturday and Saturday night. A few of these storms may become strong to severe during the afternoon and evening. Large hail, damaging winds, and heavy rain will be the primary threats. The heavy rain could lead to flash flooding if storms repeatedly move over the same areas. An isolated tornado or two will also be possible. Periodic chances of thunderstorms will continue then into Wednesday. At this time, it is too early to determine if organized severe weather will occur. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed on Saturday afternoon and evening. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ008-MNZ079-086>088-094-095-WIZ017-029-032>034-262015- Mitchell-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Taylor-Clark- Buffalo-Trempealeau-Jackson- 315 PM CDT Fri Jun 25 2021 This Hazardous Weather Outlook is for portions of north central Iowa...southeast Minnesota...central Wisconsin...north central Wisconsin and west central Wisconsin. .DAY ONE...This Afternoon and Tonight Scattered thunderstorms are possible this afternoon and evening, mainly across northeastern Iowa and southwestern Wisconsin. The overall threat for severe weather is low at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Periodic chances of thunderstorms will continue into Wednesday. At this time, it is too early to determine if organized severe weather will occur. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. KDS/Boyne
In the hours before
Local storm report, Jun 25, 10:59 AM CDT, 5 hours 49 minutes before
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</html>Local storm report, Jun 25, 11:00 AM CDT, 5 hours 48 minutes before
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</html>Local storm report, Jun 25, 12:01 PM CDT, 4 hours 47 minutes before
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</html>Special weather statement, Jun 25, 2:50 PM CDT, 1 hour 58 minutes before
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</html>The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 7:39 PM CDT | Special Weather Statement | ARX | La Crosse, Monroe | 66 min |
| Jun 24, 8:25 PM CDT | Areal Flood Advisory | ARX | La Crosse | 110 min |
| Jun 25, 6:52 PM CDT | Areal Flood Advisory | ARX | Chickasaw, Winneshiek | 2 hr |
Nearby
Areal Flood Advisories in Iowa, 2021Every areal flood advisory 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.