Alert archive / Wyoming / High Wind Watches in 2015
High Wind Watch 22, NWS Riverton, WY
NWS Riverton, WY issued this high wind watch at Dec 20, 2015, 12:38 AM MST for Fremont County, Natrona County, Sweetwater County, Wyoming. It took effect at Dec 21, 2015, 8:00 PM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 20, 2015, 12:38 AM MST (07:38 UTC)
- In effect from
- Dec 21, 2015, 8:00 PM MST
- Expired
- Dec 20, 2015, 10:04 PM MST
- In force
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Natrona County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 65 km from the middle of the area, began a volume at 07:42 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 00:00Z, 7.6 hours before the alert went out and 62 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
- 2170 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 122 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 Riverton, WY wrote its last area forecast discussion before this high wind watch went out at Dec 19, 10:41 PM MST, 1 hour 57 minutes earlier.
Area forecast discussion, Dec 19, 10:41 PM MST, 1 hour 57 minutes before
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</html>The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 1:41 AM MST | Winter Storm Watch | RIW | Fremont, Lincoln, Sublette, Teton | 21 hr |
Nearby
High Wind Watches in Wyoming, 2015Every high wind watch in 2015
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.