Alert archive / Iowa / Special Weather Statements in 2020
Special Weather Statement, NWS La Crosse, WI
NWS La Crosse, WI issued this special weather statement at Apr 22, 2020, 2:20 PM CDT for Crawford County, Wisconsin; Allamakee County, Chickasaw County, Winneshiek County, Iowa. It was in force for 55 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
- Apr 22, 2020, 2:20 PM CDT (19:20 UTC)
- Expired
- Apr 22, 2020, 3:15 PM CDT
- In force
- 55 min
- Issued by
- NWS La Crosse, WI
Counties Allamakee County, IA, Chickasaw County, IA, Winneshiek County, IA, Crawford County, WI
The radar
The La Crosse radar (KARX), 76 km from the middle of the area, began a volume at 19:21 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 188 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
- 2059 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 412 m²/s²
- 0-3 km storm-relative helicity
- 473 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 La Crosse, WI wrote its last area forecast discussion before this special weather statement went out at Apr 22, 1:00 PM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, Apr 22, 1:00 PM CDT, 1 hour 20 minutes before
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<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<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.
</p>
<p id="message2">
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>Hazardous weather outlook, Apr 22, 3:59 AM CDT, 10 hours 21 minutes before
Hazardous Weather Outlook National Weather Service La Crosse WI 359 AM CDT Wed Apr 22 2020 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-231200- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau- Adams-Vernon-Crawford-Richland-Grant- 359 AM CDT Wed Apr 22 2020 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight Scattered thunderstorms are possible from mid afternoon through early this evening, mainly south of Interstate 90. A few could produce gusty winds or small hail. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
In the hours before
Special weather statement, Apr 22, 2:20 PM CDT, 0 minutes before
Special Weather Statement National Weather Service La Crosse WI 220 PM CDT Wed Apr 22 2020 IAZ008>011-018-019-029-030-WIZ054-061-222015- Clayton-Floyd-Winneshiek-Chickasaw-Howard-Fayette-Allamakee-Mitchell- Crawford-Grant- 220 PM CDT Wed Apr 22 2020 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN MITCHELL...SOUTHERN HOWARD...NORTHWESTERN CLAYTON...NORTHERN FAYETTE...ALLAMAKEE...NORTHEASTERN FLOYD...SOUTHERN WINNESHIEK... CHICKASAW...NORTHWESTERN GRANT AND CRAWFORD COUNTIES... At 219 PM CDT, radar indicated strong thunderstorms were located along a line extending from near Waucoma to near Farmersburg. Movement was east at 40 mph. Wind gusts up to 50 mph are possible with these storms. Locations impacted include... Decorah, Prairie Du Chien, Waukon, New Hampton, West Union, Boscobel, Fennimore, Postville, Monona, Calmar, Fredericksburg, McGregor, Ossian, Elgin, Clermont, Elma, Hawkeye, Lawler, Marquette and Spillville. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. LAT...LON 4333 9080 4292 9063 4291 9219 4331 9279 TIME...MOT...LOC 1919Z 271DEG 36KT 4309 9197 4293 9143 Zapotocny
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 3:16 PM CDT | Special Weather Statement | ARX | Crawford | 59 min |
| Apr 22, 3:43 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 32 min |
| Apr 22, 4:15 PM CDT | Special Weather Statement | ARX | Crawford | 60 min |
| Apr 22, 5:03 PM CDT | Special Weather Statement | ARX | Vernon | 42 min |
| Apr 22, 5:14 PM CDT | Special Weather Statement | ARX | Grant | 61 min |
Nearby
Special Weather Statements in Iowa, 2020Special Weather Statements in Wisconsin, 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.