Alert archive / South Dakota / Winter Storm Watches in 2008

Winter Storm Watch 4, NWS Sioux Falls, SD

March 30, 200820 counties in South Dakota; Lyon County, Osceola County, Iowa; 8 counties in Minnesota

NWS Sioux Falls, SD issued this winter storm watch at Mar 30, 2008, 4:38 AM CDT for 20 counties in South Dakota; Lyon County, Osceola County, Iowa; 8 counties in Minnesota. It took effect at Mar 31, 2008, 4:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Mar 30, 2008, 4:38 AM CDT (09:38 UTC)
In effect from: Mar 31, 2008, 4:00 AM CDT
Expired: Mar 30, 2008, 2:32 PM CDT
In force
Issued by: NWS Sioux Falls, SD

All 30 counties

Lyon County, IA, Osceola County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD

The radar

The Sioux Falls radar (KFSD), 41 km from the middle of the area, began a volume at 09:40 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 00:00Z, 9.6 hours before the alert went out and 306 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: 1854 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 436 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sioux Falls, SD wrote its last area forecast discussion before this winter storm watch went out at Mar 29, 9:00 PM CDT, 7 hours 38 minutes earlier.

Area forecast discussion, Mar 29, 9:00 PM CDT, 7 hours 38 minutes before

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Hazardous weather outlook, Mar 29, 5:50 AM CDT, 22 hours 48 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 2:32 PM CDT	Heavy Snow Warning	FSD	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 16 more	28 hr
Mar 30, 2:32 PM CDT	Snow Advisory	FSD	Bon Homme, Clay, Lincoln, Turner, Union, Yankton	28 hr

Nearby

Winter Storm Watches in South Dakota, 2008 Winter Storm Watches in Minnesota, 2008 Winter Storm Watches in Iowa, 2008 Every winter storm 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.