Alert archive / South Dakota / Blizzard Warnings in 2013
Blizzard Warning 1, NWS Rapid City, SD
NWS Rapid City, SD issued this blizzard warning at Feb 9, 2013, 4:30 AM MST for 8 counties in South Dakota. It took effect at Feb 9, 2013, 6:00 PM MST. It was in force for 28 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
- Feb 9, 2013, 4:30 AM MST (11:30 UTC)
- In effect from
- Feb 9, 2013, 6:00 PM MST
- Expired
- Feb 10, 2013, 10:25 PM MST
- In force
- 28 hr
- Issued by
- NWS Rapid City, SD
Counties Bennett County, SD, Haakon County, SD, Jackson County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 11.5 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 533 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 375 m²/s²
- 0-3 km storm-relative helicity
- 378 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this blizzard warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Rapid City, SD wrote its last area forecast discussion before this blizzard warning went out at Feb 9, 2:46 AM MST, 1 hour 44 minutes earlier.
Area forecast discussion, Feb 9, 2:46 AM MST, 1 hour 44 minutes before
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</html>The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 9, 4:30 AM MST | Winter Storm Warning | UNR | Custer, Fall River, Lawrence, Meade, Pennington, Ziebach | 42 hr |
| Feb 9, 4:30 AM MST | Winter Weather Advisory | UNR | Bennett, Butte, Custer, Fall River, Haakon, Jackson and 5 more | 42 hr |
Nearby
Blizzard Warnings in South Dakota, 2013Every blizzard warning 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.