Alert archive / Montana / Wind Chill Advisories in 2006

Wind Chill Advisory 1, NWS Missoula, MT

February 16, 2006Flathead County, Lincoln County, Sanders County, Montana; Lemhi County, Idaho

NWS Missoula, MT issued this wind chill advisory at Feb 16, 2006, 2:45 PM MST for Flathead County, Lincoln County, Sanders County, Montana; Lemhi County, Idaho. It took effect at Feb 16, 2006, 5:00 PM MST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Feb 16, 2006, 2:45 PM MST (21:45 UTC)
In effect from: Feb 16, 2006, 5:00 PM MST
Expired: Feb 17, 2006, 3:07 AM MST
In force: 10 hr
Issued by: NWS Missoula, MT

Counties Lemhi County, ID, Flathead County, MT, Lincoln County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 60 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 138 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1333 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 49 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 16, 1:57 PM MST, 48 minutes earlier.

Area forecast discussion, Feb 16, 1:57 PM MST, 48 minutes before

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Hazardous weather outlook, Feb 16, 2:38 PM MST, 7 minutes before

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In the hours before

Local storm report, Feb 16, 9:54 AM MST, 4 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
954 AM MST THU FEB 16 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0525 AM     EXTR WIND CHILL  HELMVILLE               46.87N 112.96W
02/16/2006  M21 F            POWELL             MT   MESONET

            EAST WINDS 32 MPH COMBINED WITH A TEMPERATURE OF 4
            DEGREES PRODUCED A WIND CHILL TEMPERATURE OF 21 DEGREES
            BELOW ZERO.

0545 AM     EXTR WIND CHILL  6 E ELLISTON            46.56N 112.30W
02/16/2006  M27 F            LEWIS AND CLARK    MT   MESONET

            NORTHEAST WINDS OF 17 MPH COMBINED WITH A COLD
            TEMPERATURE OF 5 BELOW ZERO PRODUCED WIND CHILL
            TEMPERATURES OF 27 DEGREES BELOW ZERO.

0900 AM     BLIZZARD         HELMVILLE               46.87N 112.96W
02/16/2006                   POWELL             MT   AMATEUR RADIO

            WIND 30 TO 40 MPH CAUSING INTERMITTANT WHITE- OUT
            CONDITIONS DUE TO BLOWING SNOW ON MONTANA STATE HIGHWAY
            141.

&&

KRENZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 16, 9:40 AM MST	Wind Chill Warning	MSO	Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 4 more	24 hr
Feb 16, 2:45 PM MST	Winter Weather Advisory	MSO	Clearwater, Idaho	12 hr

Nearby

Wind Chill Advisories in Montana, 2006 Wind Chill Advisories in Idaho, 2006 Every wind chill advisory in 2006

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.