Alert archive / Minnesota / Winter Storm Warnings in 2008

Winter Storm Warning 4, NWS Duluth, MN

April 25, 20085 counties in Minnesota

NWS Duluth, MN issued this winter storm warning at Apr 25, 2008, 4:17 AM CDT for 5 counties in Minnesota. It took effect at Apr 25, 2008, 9:00 AM CDT. It was in force for 34 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 25, 2008, 4:17 AM CDT (09:17 UTC)
In effect from: Apr 25, 2008, 9:00 AM CDT
Expired: Apr 26, 2008, 6:41 PM CDT
In force: 34 hr
Issued by: NWS Duluth, MN

Counties Cass County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 124 km from the middle of the area, began a volume at 09:15 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

International Fa, MN (KINL), launched 00:00Z, 9.3 hours before the alert went out and 138 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: -6 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 winter storm 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 winter storm warning went out at Apr 24, 9:42 PM CDT, 6 hours 35 minutes earlier.

Area forecast discussion, Apr 24, 9:42 PM CDT, 6 hours 35 minutes before

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Hazardous weather outlook, Apr 24, 4:37 PM CDT, 11 hours 40 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 4:17 AM CDT	Winter Weather Advisory	DLH	Aitkin, Crow Wing, Saint Louis	38 hr
Apr 25, 11:41 AM CDT	River Flood Warning	DLH	Aitkin, Crow Wing	13 days
Apr 25, 12:25 PM CDT	River Flood Warning	DLH	Itasca	4 days

Nearby

Winter Storm Warnings in Minnesota, 2008 Every winter storm warning in 2008

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.