Alert archive / Minnesota / Flood Watches in 2022

Flood Watch 6, NWS La Crosse, WI

August 27, 20226 counties in Iowa; 7 counties in Minnesota

NWS La Crosse, WI issued this flood watch at Aug 27, 2022, 2:11 PM CDT for 6 counties in Iowa; 7 counties in Minnesota. It took effect at Aug 27, 2022, 10:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Aug 27, 2022, 2:11 PM CDT (19:11 UTC)
In effect from: Aug 27, 2022, 10:00 PM CDT
Expired: Aug 28, 2022, 4:05 AM CDT
In force: 6 hr
Issued by: NWS La Crosse, WI
Flood severity: None

Counties Allamakee County, IA, Chickasaw County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN

The radar

The La Crosse radar (KARX), 88 km from the middle of the area, began a volume at 19:12 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

Minneapolis, MN (KMPX), launched 12:00Z, 7.2 hours before the alert went out and 177 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: 127 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 785 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 494 m²/s²
0-3 km storm-relative helicity: 516 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Aug 27, 1:30 PM CDT, 41 minutes earlier.

Area forecast discussion, Aug 27, 1:30 PM CDT, 41 minutes before

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Hazardous weather outlook, Aug 27, 9:19 AM CDT, 4 hours 52 minutes before

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In the hours before

Local storm report, Aug 27, 1:02 PM CDT, 1 hour 9 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, 1:43 PM CDT	Areal Flood Advisory	ARX	Juneau, Monroe, Vernon	2 hr

Nearby

Flood Watches in Minnesota, 2022 Flood Watches in Iowa, 2022 Every flood watch in 2022

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.