Alert archive / Wisconsin / Areal Flood Warnings in 2020

Areal Flood Warning 2, NWS La Crosse, WI

August 28, 2020Adams County, Juneau County, Wisconsin

NWS La Crosse, WI issued this areal flood warning at Aug 28, 2020, 6:48 AM CDT for Adams County, Juneau County, Wisconsin. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 28, 2020, 6:48 AM CDT (11:48 UTC)
Expired: Aug 28, 2020, 12:45 PM CDT
In force: 6 hr
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Flood severity: None

Counties Adams County, WI, Juneau County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 11.8 hours before the alert went out and 158 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1605 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Aug 28, 6:09 AM CDT, 39 minutes earlier.

Area forecast discussion, Aug 28, 6:09 AM CDT, 39 minutes before

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Hazardous weather outlook, Aug 28, 4:51 AM CDT, 1 hour 57 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
451 AM CDT Fri Aug 28 2020

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-291100-
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-
451 AM CDT Fri Aug 28 2020

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Today and Tonight

Severe storms will be possible this morning for locations
generally north of Interstate 90. Damaging winds, large hail and
locally heavy rains leading to flash flooding will be possible.

Another round of severe storms will be possible this afternoon
generally south of Interstate 90. Large hail, possibly up to 2
inches in diameter, and damaging wind gusts up to 70 mph will be
the main threats. An isolated tornado could also occur.

A Flash Flood Watch is in effect for portions of western Wisconsin
today.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There will be on and off chances for additional storms from Sunday
night through Thursday. At this time, organized severe weather is
not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today, especially during the
afternoon.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

04

In the hours before

Special weather statement, Aug 28, 5:35 AM CDT, 1 hour 13 minutes before

Special Weather Statement
National Weather Service La Crosse WI
535 AM CDT Fri Aug 28 2020

MNZ079-086-087-094-281230-
Wabasha-Dodge-Olmsted-Mower-
Including the cities of Wabasha, Dodge Center, Rochester,
and Austin
535 AM CDT Fri Aug 28 2020

...Thunderstorms Moving In This Morning...

Showers and thunderstorms will move across southeast Minnesota
through 9 am.

Wind gusts to 40 mph, small hail, and frequent lightning will
accompany the storms. Be aware that brief heavy rainfall will slow
your commute as well.

However, isolated storms could be severe with hail to 1" in
diameter and damaging winds.

A Severe Thunderstorm Watch is in effect until 9 am.

Baumgardt

Local storm report, Aug 28, 6:08 AM CDT, 40 minutes before

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Local storm report, Aug 28, 6:09 AM CDT, 39 minutes before

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Local storm report, Aug 28, 6:14 AM CDT, 34 minutes before

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Special weather statement, Aug 28, 6:25 AM CDT, 23 minutes before

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Local storm report, Aug 28, 6:42 AM CDT, 6 minutes before

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The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 27, 7:13 PM CDT	Special Weather Statement	ARX	Juneau	47 min
Aug 27, 7:35 PM CDT	Flash Flood Watch	ARX	Adams, Jackson, Juneau, Monroe	17 hr
Aug 27, 10:14 PM CDT	Special Weather Statement	ARX	La Crosse, Monroe	31 min
Aug 27, 10:43 PM CDT	Special Weather Statement	ARX	Monroe, Vernon	47 min
Aug 27, 11:13 PM CDT	Special Weather Statement	ARX	Adams	47 min
Aug 27, 11:49 PM CDT	Special Weather Statement	ARX	Sauk	41 min
Aug 28, 12:28 AM CDT	Flash Flood Warning	ARX	Adams, Juneau	6 hr
Aug 28, 1:32 AM CDT	Special Weather Statement	ARX	Jackson	43 min
Aug 28, 3:28 AM CDT	Flash Flood Warning	ARX	Monroe	4 hr
Aug 28, 4:02 AM CDT	Flash Flood Warning	ARX	Juneau	3 hr
Aug 28, 5:58 AM CDT	Flash Flood Warning	ARX	Jackson, Juneau, Monroe	4 hr
Aug 28, 6:25 AM CDT	Special Weather Statement	ARX	Buffalo	65 min
Aug 28, 6:52 AM CDT	Special Weather Statement	ARX	Buffalo, Clark, Jackson, Taylor, Trempealeau	68 min
Aug 28, 7:07 AM CDT	Areal Flood Warning	ARX	Juneau, Monroe	6 hr
Aug 28, 7:35 AM CDT	Special Weather Statement	ARX	Clark, Jackson, La Crosse, Monroe, Taylor, Trempealeau and 1 more	70 min
Aug 28, 8:33 AM CDT	Special Weather Statement	ARX	Adams, Crawford, Juneau, La Crosse, Monroe, Richland and 1 more	72 min
Aug 28, 12:41 PM CDT	Areal Flood Warning	ARX	Adams, Jackson, Juneau, Monroe	20 hr
Aug 28, 3:30 PM CDT	Special Weather Statement	ARX	Grant	30 min
Aug 28, 3:57 PM CDT	Special Weather Statement	ARX	Grant	33 min
Aug 28, 4:25 PM CDT	Special Weather Statement	ARX	Grant	35 min
Aug 28, 3:09 PM CDT	Special Weather Statement	ARX	Fayette	51 min
Aug 28, 6:07 AM CDT	Severe Thunderstorm Warning	ARX	Dodge	38 min

Nearby

Areal Flood Warnings in Wisconsin, 2020 Every areal flood warning 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.