Alert archive / Minnesota / Red Flag Warnings in 2009

Red Flag Warning 1, NWS Duluth, MN

April 23, 200910 counties in Minnesota; 6 counties in Wisconsin

NWS Duluth, MN issued this red flag warning at Apr 23, 2009, 9:25 AM CDT for 10 counties in Minnesota; 6 counties in Wisconsin. It took effect at Apr 23, 2009, 12:00 PM CDT. It was in force for 7 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: Apr 23, 2009, 9:25 AM CDT (14:25 UTC)
In effect from: Apr 23, 2009, 12:00 PM CDT
Expired: Apr 23, 2009, 7:00 PM CDT
In force: 7 hr
Issued by: NWS Duluth, MN

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 14 km from the middle of the area, began a volume at 14:27 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, 2.4 hours before the alert went out and 236 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2395 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 847 m²/s²
0-3 km storm-relative helicity: 1063 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 red flag 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 red flag warning went out at Apr 23, 3:56 AM CDT, 5 hours 29 minutes earlier.

Area forecast discussion, Apr 23, 3:56 AM CDT, 5 hours 29 minutes before

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Hazardous weather outlook, Apr 23, 7:04 AM CDT, 2 hours 21 minutes before

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In the hours before

Special weather statement, Apr 23, 8:09 AM CDT, 1 hour 16 minutes before

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Nearby

Red Flag Warnings in Minnesota, 2009 Red Flag Warnings in Wisconsin, 2009 Every red flag warning in 2009

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.