Alert archive / South Dakota / High Wind Watches in 2021
High Wind Watch 10, NWS Rapid City, SD
NWS Rapid City, SD issued this high wind watch at Dec 22, 2021, 1:23 PM MST for 4 counties in South Dakota; Campbell County, Wyoming. It took effect at Dec 23, 2021, 2:00 PM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 22, 2021, 1:23 PM MST (20:23 UTC)
- In effect from
- Dec 23, 2021, 2:00 PM MST
- Expired
- Dec 23, 2021, 9:51 AM MST
- In force
- Issued by
- NWS Rapid City, SD
Counties Custer County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Campbell County, WY
The radar
The Rapid City radar (KUDX), 67 km from the middle of the area, began a volume at 20:24 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
Riverton, WY (KRIW), launched 12:00Z, 8.4 hours before the alert went out and 400 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
- 2970 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this high wind watch 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 high wind watch went out at Dec 22, 1:21 PM MST, 2 minutes earlier.
Area forecast discussion, Dec 22, 1:21 PM MST, 2 minutes before
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</html>Hazardous weather outlook, Dec 22, 2:15 AM MST, 11 hours 8 minutes before
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</html>Nearby
High Wind Watches in South Dakota, 2021High Wind Watches in Wyoming, 2021Every high wind watch in 2021
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.