Alert archive / Minnesota / Winter Weather Advisories in 2013

Winter Weather Advisory 13, NWS Sioux Falls, SD

March 18, 2013Brookings County, Kingsbury County, South Dakota; 4 counties in Minnesota

NWS Sioux Falls, SD issued this winter weather advisory at Mar 18, 2013, 4:38 AM CDT for Brookings County, Kingsbury County, South Dakota; 4 counties in Minnesota. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Mar 18, 2013, 4:38 AM CDT (09:38 UTC)
Expired
Mar 18, 2013, 7:00 PM CDT
In force
14 hr
Issued by
NWS Sioux Falls, SD

Counties Cottonwood County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Brookings County, SD, Kingsbury County, SD

The radar

The Sioux Falls radar (KFSD), 86 km from the middle of the area, began a volume at 09:38 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

Omaha, NE (KOAX), launched 00:00Z, 9.6 hours before the alert went out and 328 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2013-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2013-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1102 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 18, 4:38 AM CDTBlizzard WarningFSDBrookings, Kingsbury4 hr
Mar 17, 8:15 PM CDTWinter Weather AdvisoryFSDBuena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 2 more15 hr

Nearby

Winter Weather Advisories in Minnesota, 2013Winter Weather Advisories in South Dakota, 2013Every winter weather advisory in 2013

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.