Alert archive / South Dakota / Winter Storm Warnings in 2009

Winter Storm Warning 1, NWS Aberdeen, SD

February 9, 20095 counties in South Dakota

NWS Aberdeen, SD issued this winter storm warning at Feb 9, 2009, 10:02 AM CST for 5 counties in South Dakota. It took effect at Feb 10, 2009, 12:00 AM CST. It was in force for 10 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: Feb 9, 2009, 10:02 AM CST (16:02 UTC)
In effect from: Feb 10, 2009, 12:00 AM CST
Expired: Feb 10, 2009, 10:02 AM CST
In force: 10 hr
Issued by: NWS Aberdeen, SD

Counties Campbell County, SD, Corson County, SD, Dewey County, SD, Potter County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 152 km from the middle of the area, began a volume at 16:05 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 4.0 hours before the alert went out and 151 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: 3 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 199 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 Aberdeen, SD wrote its last area forecast discussion before this winter storm warning went out at Feb 9, 9:54 AM CST, 8 minutes earlier.

Area forecast discussion, Feb 9, 9:54 AM CST, 8 minutes before

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Hazardous weather outlook, Feb 9, 4:57 AM CST, 5 hours 5 minutes before

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      <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 Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 9, 2:25 PM CST	Winter Weather Advisory	ABR	Edmunds, Faulk, McPherson	14 hr

Nearby

Winter Storm Warnings in South Dakota, 2009 Every winter storm 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.