Alert archive / Montana / Winter Storm Warnings in 2016

Winter Storm Warning 7, NWS Billings, MT

December 3, 20164 counties in Montana

NWS Billings, MT issued this winter storm warning at Dec 3, 2016, 6:07 PM MST for 4 counties in Montana. It took effect at Dec 4, 2016, 12:00 AM MST. It was in force for 34 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 3, 2016, 6:07 PM MST (01:07 UTC)
In effect from
Dec 4, 2016, 12:00 AM MST
Expired
Dec 5, 2016, 9:36 AM MST
In force
34 hr
Issued by
NWS Billings, MT

Counties Carbon County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT

The radar

The Billings radar (KBLX), 93 km from the middle of the area, began a volume at 01:13 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, 1.1 hours before the alert went out and 295 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, Riverton, WY at 00:00Z on 2016-12-04Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2016-12-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939587897117136156Sfc1 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
2297 m above ground
0-6 km bulk shear
106 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
61 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 winter storm 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 winter storm warning went out at Dec 3, 2:27 PM MST, 3 hours 40 minutes earlier.

Area forecast discussion, Dec 3, 2:27 PM MST, 3 hours 40 minutes before
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Hazardous weather outlook, Dec 3, 2:13 PM MST, 3 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
213 PM MST SAT DEC 3 2016

MTZ028>042-056>058-063>068-WYZ098-099-042115-
SOUTHERN WHEATLAND-MUSSELSHELL-TREASURE-NORTHERN ROSEBUD-CUSTER-
FALLON-NORTHERN STILLWATER-YELLOWSTONE-POWDER RIVER-CARTER-
SOUTHERN BIG HORN-EASTERN CARBON-NORTHERN PARK-
NORTHERN SWEET GRASS-GOLDEN VALLEY-RED LODGE FOOTHILLS-
NORTHERN BIG HORN-SOUTHERN ROSEBUD-JUDITH GAP-PARADISE VALLEY-
LIVINGSTON AREA-BEARTOOTH FOOTHILLS-ABSAROKA/BEARTOOTH MOUNTAINS-
CRAZY MOUNTAINS-NORTHEAST BIGHORN MOUNTAINS-SHERIDAN FOOTHILLS-
213 PM MST SAT DEC 3 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH
CENTRAL WYOMING.

* TIMING: SUNDAY NIGHT THROUGH WEDNESDAY NIGHT.

* POTENTIAL IMPACTS: ACCUMULATING SNOW. ICY AND/OR SNOW COVERED
  ROADS RESULTING IN DIFFICULT TRAVEL CONDITIONS. VERY COLD
  TEMPERATURES AND WIND CHILLS RESULTING IN COLD EXPOSURE HEALTH
  CONCERNS.

* TEMPERATURES: HIGHS IN THE SINGLE DIGITS TUESDAY AND WEDNESDAY.
  LOWS IN THE SINGLE DIGITS ABOVE AND BELOW ZERO MONDAY NIGHT
  THROUGH WEDNESDAY NIGHT.

* SNOW ACCUMULATION: 2-4 INCHES OF ACCUMULATION POSSIBLE OVER THE
  PLAINS. 8-14 INCHES FOR AREA MOUNTAINS.

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.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 4, 4:11 AM MSTWinter Weather AdvisoryBYZBig Horn, Carbon, Carter, Golden Valley, Musselshell, Park and 6 more34 hr

Nearby

Winter Storm Warnings in Montana, 2016Every winter storm warning in 2016

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.