Alert archive / South Dakota / High Wind Warnings in 2009

High Wind Warning 7, NWS Rapid City, SD

September 30, 20097 counties in South Dakota

NWS Rapid City, SD issued this high wind warning at Sep 30, 2009, 3:26 AM MDT for 7 counties in South Dakota. It took effect at Oct 1, 2009, 2:00 AM MDT. It was in force for 19 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
Sep 30, 2009, 3:26 AM MDT (09:26 UTC)
In effect from
Oct 1, 2009, 2:00 AM MDT
Expired
Oct 1, 2009, 9:01 PM MDT
In force
19 hr
Issued by
NWS Rapid City, SD

Counties Butte County, SD, Custer County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 9.4 hours before the alert went out and 304 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 2009-09-30Temperature 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 2009-09-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
2244 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
393 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
Sep 30, 3:26 AM MDTWinter Storm WatchUNRCuster, Lawrence, Meade, Pennington12 hr
Sep 30, 3:00 PM MDTWind AdvisoryUNRBennett, Butte, Custer, Fall River, Haakon, Harding and 10 more48 hr
Sep 30, 3:04 PM MDTWinter Storm WarningUNRLawrence, Meade, Pennington12 hr
Sep 30, 3:04 PM MDTWinter Weather AdvisoryUNRCuster, Lawrence, Meade, Pennington24 hr

Nearby

High Wind Warnings in South Dakota, 2009Every high wind 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.