Alert archive / South Dakota / Blizzard Watches in 2008

Blizzard Watch 4, NWS Aberdeen, SD

December 18, 200821 counties in South Dakota; Big Stone County, Traverse County, Minnesota

NWS Aberdeen, SD issued this blizzard watch at Dec 18, 2008, 2:22 PM CST for 21 counties in South Dakota; Big Stone County, Traverse County, Minnesota. It took effect at Dec 20, 2008, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Dec 18, 2008, 2:22 PM CST (20:22 UTC)
In effect from: Dec 20, 2008, 6:00 AM CST
Expired: Dec 19, 2008, 4:49 AM CST
In force
Issued by: NWS Aberdeen, SD

All 23 counties

Big Stone County, MN, Traverse County, MN, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 27 km from the middle of the area, began a volume at 20:25 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

Aberdeen, SD (KABR), launched 12:00Z, 8.4 hours before the alert went out and 37 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: 1389 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: -76 m²/s²
0-3 km storm-relative helicity: -43 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 blizzard watch 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 blizzard watch went out at Dec 18, 4:21 AM CST, 10 hours 1 minute earlier.

Area forecast discussion, Dec 18, 4:21 AM CST, 10 hours 1 minute before

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Hazardous weather outlook, Dec 18, 4:37 AM CST, 9 hours 45 minutes before

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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 18, 4:28 AM CST	Winter Storm Watch	ABR	Brown, Clark, Codington, Day, Deuel, Grant and 4 more	10 hr

Nearby

Blizzard Watches in South Dakota, 2008 Blizzard Watches in Minnesota, 2008 Every blizzard watch 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.