Alert archive / Montana / High Wind Warnings in 2020
High Wind Warning 18, NWS Billings, MT
NWS Billings, MT issued this high wind warning at Dec 22, 2020, 2:18 AM MST for 12 counties in Montana; Sheridan County, Wyoming. It took effect at Dec 22, 2020, 8:00 AM MST. It was in force for 19 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
- Dec 22, 2020, 2:18 AM MST (09:18 UTC)
- In effect from
- Dec 22, 2020, 8:00 AM MST
- Expired
- Dec 23, 2020, 2:38 AM MST
- In force
- 19 hr
- Issued by
- NWS Billings, MT
Counties Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Golden Valley County, MT, Musselshell County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Sheridan County, WY
The radar
The Billings radar (KBLX), 111 km from the middle of the area, began a volume at 09:24 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
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 9.3 hours before the alert went out and 262 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
- 1428 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 307 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 warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Billings, MT wrote its last area forecast discussion before this high wind warning went out at Dec 21, 8:09 PM MST, 6 hours 9 minutes earlier.
Area forecast discussion, Dec 21, 8:09 PM MST, 6 hours 9 minutes before
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</html>Hazardous weather outlook, Dec 21, 5:56 PM MST, 8 hours 22 minutes before
Hazardous Weather Outlook National Weather Service Billings MT 556 PM MST Mon Dec 21 2020 MTZ029>031-034-042-057-058-063-173-228-235-220700- Musselshell-Treasure-Northern Rosebud-Northern Stillwater- Golden Valley-Northern Big Horn-Southern Rosebud-Judith Gap- Northeastern Yellowstone-Southern Wheatland- Southwestern Yellowstone- 556 PM MST Mon Dec 21 2020 This Hazardous Weather Outlook is for portions of central Montana...south central Montana and southeast Montana. * WHAT...Locally Dense Fog. * WHEN...This Evening. * ADDITIONAL DETAILS...Locally dense fog has developed along and north of a Harlowton to Billings to Ashland line. This includes portions of highway 12, I-90, and I-94. Fog potential is expected to decrease after midnight tonight. * ADDITIONAL HAZARD CONCERNS...Visibility as low as a quarter of a mile will make travel difficult in spots. Be alert for ice on roadways where temperatures are below freezing. Slow down and allow extra time to get to your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Hazardous Weather Outlook is issued when hazardous weather could impact the region within the next week. Be sure to stay tuned for future updates as locations, timing, and impacts could change. Begin preparations to mitigate any impacts that could result from the hazardous weather. &&
In the hours before
Local storm report, Dec 21, 9:36 PM MST, 4 hours 42 minutes before
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</html>Local storm report, Dec 21, 10:39 PM MST, 3 hours 39 minutes before
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</html>Local storm report, Dec 21, 11:31 PM MST, 2 hours 47 minutes before
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</html>Local storm report, Dec 22, 12:14 AM MST, 2 hours 4 minutes before
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Please try again in a few minutes.
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</html>The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 7:49 PM MST | Dense Fog Advisory | BYZ | Golden Valley, Musselshell, Rosebud, Treasure, Wheatland, Yellowstone | 6 hr |
Nearby
High Wind Warnings in Montana, 2020High Wind Warnings in Wyoming, 2020Every high wind warning 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.