Alert archive / Montana / High Wind Watches in 2012
High Wind Watch 3, NWS Billings, MT
NWS Billings, MT issued this high wind watch at Feb 20, 2012, 10:19 AM MST for 13 counties in Montana. It took effect at Feb 21, 2012, 6:00 AM MST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Feb 20, 2012, 10:19 AM MST (17:19 UTC)
- In effect from
- Feb 21, 2012, 6:00 AM MST
- Expired
- Feb 21, 2012, 3:25 PM MST
- In force
- 9 hr
- Issued by
- NWS Billings, MT
Counties Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Golden Valley County, MT, Musselshell County, MT, Park County, MT, Powder River County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Wheatland County, MT
The radar
The Billings radar (KBLX), 50 km from the middle of the area, began a volume at 17:20 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, 5.3 hours before the alert went out and 315 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
- 1714 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 37 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 Billings, MT wrote its last area forecast discussion before this high wind watch went out at Feb 20, 3:44 AM MST, 6 hours 35 minutes earlier.
Area forecast discussion, Feb 20, 3:44 AM MST, 6 hours 35 minutes before
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</html>Hazardous weather outlook, Feb 20, 4:41 AM MST, 5 hours 38 minutes before
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</html>Nearby
High Wind Watches in Montana, 2012High Wind Watches in Wyoming, 2012Every high wind watch in 2012
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.