Alert archive / Wisconsin / Flash Flood Warnings in 2020

Flash Flood Warning 1, NWS Duluth, MN

May 27, 2020Sawyer County, Wisconsin

NWS Duluth, MN issued this flash flood warning at May 27, 2020, 6:31 PM CDT for Sawyer County, Wisconsin. It was in force for 3 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: May 27, 2020, 6:31 PM CDT (23:31 UTC)
Expired: May 27, 2020, 9:30 PM CDT
In force: 3 hr
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Flood severity: Moderate

County Sawyer County, WI

The radar

The Duluth radar (KDLH), 134 km from the middle of the area, began a volume at 23:32 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.5 hours before the alert went out and 285 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: 40 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1104 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 126 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this flash flood warning went out at May 27, 6:24 PM CDT, 7 minutes earlier.

Area forecast discussion, May 27, 6:24 PM CDT, 7 minutes before

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Hazardous weather outlook, May 27, 3:54 PM CDT, 2 hours 37 minutes before

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In the hours before

Local storm report, May 27, 4:46 PM CDT, 1 hour 45 minutes before

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Local storm report, May 27, 4:49 PM CDT, 1 hour 42 minutes before

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Local storm report, May 27, 5:44 PM CDT, 47 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 7:55 PM CDT	Special Weather Statement	DLH	Pine	35 min
May 26, 8:00 PM CDT	Special Weather Statement	DLH	Pine	30 min
May 27, 1:16 AM CDT	Dense Fog Advisory	DLH	Aitkin, Cass, Crow Wing, Itasca, Koochiching, Saint Louis	7 hr
May 26, 7:05 PM CDT	Special Weather Statement	DLH	Burnett	25 min
May 26, 7:19 PM CDT	Special Weather Statement	DLH	Burnett	26 min
May 26, 8:10 PM CDT	Special Weather Statement	DLH	Burnett, Washburn	35 min
May 26, 8:28 PM CDT	Special Weather Statement	DLH	Bayfield	32 min
May 26, 8:44 PM CDT	Special Weather Statement	DLH	Washburn	31 min
May 26, 9:00 PM CDT	Special Weather Statement	DLH	Sawyer	30 min
May 26, 9:26 PM CDT	Special Weather Statement	DLH	Price	34 min

Nearby

Flash Flood Warnings in Wisconsin, 2020 Every flash 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.