Alert archive / Wisconsin / Areal Flood Warnings in 2020

Areal Flood Warning 4, NWS La Crosse, WI

August 28, 20204 counties in Wisconsin

NWS La Crosse, WI issued this areal flood warning at Aug 28, 2020, 12:41 PM CDT for 4 counties in Wisconsin. It was in force for 20 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, 12:41 PM CDT (17:41 UTC)
Expired: Aug 29, 2020, 8:45 AM CDT
In force: 20 hr
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Flood severity: None

Counties Adams County, WI, Jackson County, WI, Juneau County, WI, Monroe County, WI

The radar

The La Crosse radar (KARX), 73 km from the middle of the area, began a volume at 17:45 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, 5.7 hours before the alert went out and 269 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: 573 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1010 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 11:46 AM CDT, 55 minutes earlier.

Area forecast discussion, Aug 28, 11:46 AM CDT, 55 minutes before

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Hazardous weather outlook, Aug 28, 11:03 AM CDT, 1 hour 38 minutes before

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In the hours before

Local storm report, Aug 28, 10:05 AM CDT, 2 hours 36 minutes before

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Local storm report, Aug 28, 10:19 AM CDT, 2 hours 22 minutes before

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Local storm report, Aug 28, 10:53 AM CDT, 1 hour 48 minutes before

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Local storm report, Aug 28, 10:54 AM CDT, 1 hour 47 minutes before

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Local storm report, Aug 28, 11:11 AM CDT, 1 hour 30 minutes before

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Local storm report, Aug 28, 11:32 AM CDT, 1 hour 9 minutes before

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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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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, 6:48 AM CDT	Areal Flood Warning	ARX	Adams, Juneau	6 hr
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, 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; radar from the NEXRAD Level II archive.