Alert archive / South Dakota / Wind Advisories in 2009
Wind Advisory 14, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this wind advisory at Sep 30, 2009, 3:54 PM CDT for Brule County, Charles Mix County, Gregory County, South Dakota. It took effect at Oct 1, 2009, 1:00 PM CDT. It was in force for 108 min.
The area
The counties it named.
The facts
- Issued
- Sep 30, 2009, 3:54 PM CDT (20:54 UTC)
- In effect from
- Oct 1, 2009, 1:00 PM CDT
- Expired
- Oct 1, 2009, 2:48 PM CDT
- In force
- 108 min
- Issued by
- NWS Sioux Falls, SD
Counties Brule County, SD, Charles Mix County, SD, Gregory County, SD
The radar
The Sioux Falls radar (KFSD), 181 km from the middle of the area, began a volume at 21:05 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.9 hours before the alert went out and 284 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1470 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this wind advisory 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 wind advisory went out at Sep 30, 3:30 PM CDT, 24 minutes earlier.
Area forecast discussion, Sep 30, 3:30 PM CDT, 24 minutes before
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</html>Hazardous weather outlook, Sep 30, 12:18 PM CDT, 3 hours 36 minutes before
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</html>Nearby
Wind Advisories in South Dakota, 2009Every wind advisory 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; radar from the NEXRAD Level II archive.