Alert archive / South Dakota / Wind Advisories in 2018

Wind Advisory 24, NWS Rapid City, SD

December 12, 20189 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Dec 12, 2018, 2:44 AM MST for 9 counties in South Dakota. It took effect at Dec 12, 2018, 2:00 PM MST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Dec 12, 2018, 2:44 AM MST (09:44 UTC)
In effect from
Dec 12, 2018, 2:00 PM MST
Expired
Dec 12, 2018, 8:28 PM MST
In force
6 hr
Issued by
NWS Rapid City, SD

Counties Butte County, SD, Custer County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 9.7 hours before the alert went out and 285 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, Bismarck Municip, ND at 00:00Z on 2018-12-12Temperature 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, Bismarck Municip, ND at 00:00Z on 2018-12-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -79 square meters per square second.1939Sfc1 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
1247 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-79 m²/s²
0-3 km storm-relative helicity
-39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 12, 2:41 AM MSTWinter Weather AdvisoryUNRCuster, Lawrence, Meade, Pennington17 hr
Dec 12, 2:44 AM MSTHigh Wind WarningUNRMeade, Pennington18 hr

Nearby

Wind Advisories in South Dakota, 2018Every wind advisory in 2018

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.