Alert archive / Montana / Wind Chill Advisories in 2022

Wind Chill Advisory 1, NWS Missoula, MT

February 1, 20229 counties in Montana

NWS Missoula, MT issued this wind chill advisory at Feb 1, 2022, 10:21 AM MST for 9 counties in Montana. It took effect at Feb 1, 2022, 8:00 PM MST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued
Feb 1, 2022, 10:21 AM MST (17:21 UTC)
In effect from
Feb 1, 2022, 8:00 PM MST
Expired
Feb 2, 2022, 12:00 PM MST
In force
16 hr
Issued by
NWS Missoula, MT

Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 27 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

Spokane, WA (KOTX), launched 12:00Z, 5.4 hours before the alert went out and 222 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.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2022-02-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2022-02-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1162 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Missoula, MT wrote its last area forecast discussion before this wind chill advisory went out at Feb 1, 6:08 AM MST, 4 hours 13 minutes earlier.

Area forecast discussion, Feb 1, 6:08 AM MST, 4 hours 13 minutes before
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The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 31, 5:58 PM MSTSpecial Weather StatementMSOMissoula47 min
Jan 31, 7:55 PM MSTSpecial Weather StatementMSOMissoula50 min
Feb 1, 6:05 AM MSTWinter Weather AdvisoryMSODeer Lodge, Granite, Lake, Missoula, Powell, Ravalli and 1 more21 hr
Feb 1, 4:58 PM MSTSnow Squall WarningMSOFlathead47 min

Nearby

Wind Chill Advisories in Montana, 2022Every wind chill advisory in 2022

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.