Alert archive / Nebraska / High Wind Watches in 2020
High Wind Watch 40, NWS Cheyenne, WY
NWS Cheyenne, WY issued this high wind watch at Dec 22, 2020, 3:39 AM MST for Converse County, Niobrara County, Platte County, Wyoming; 7 counties in Nebraska. It took effect at Dec 22, 2020, 11:00 AM MST. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Dec 22, 2020, 3:39 AM MST (10:39 UTC)
- In effect from
- Dec 22, 2020, 11:00 AM MST
- Expired
- Dec 22, 2020, 1:13 PM MST
- In force
- 2 hr
- Issued by
- NWS Cheyenne, WY
Counties Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Converse County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 125 km from the middle of the area, began a volume at 10:41 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
Rapid City, SD (KUNR), launched 00:00Z, 10.7 hours before the alert went out and 240 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
- 2128 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 239 m²/s²
- 0-3 km storm-relative helicity
- 496 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 Cheyenne, WY wrote its last area forecast discussion before this high wind watch went out at Dec 21, 10:24 PM MST, 5 hours 15 minutes earlier.
Area forecast discussion, Dec 21, 10:24 PM MST, 5 hours 15 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 22, 5:55 AM MST | Winter Weather Advisory | CYS | Albany, Carbon | 27 hr |
| Dec 22, 1:13 PM MST | High Wind Warning | CYS | Albany, Carbon, Goshen, Laramie | 21 hr |
Nearby
High Wind Watches in Nebraska, 2020High Wind Watches in Wyoming, 2020Every high wind watch in 2020
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.