Alert archive / Montana / Winter Storm Warnings in 2011

Winter Storm Warning 10, NWS Billings, MT

April 6, 20116 counties in Montana

NWS Billings, MT issued this winter storm warning at Apr 6, 2011, 3:40 PM MDT for 6 counties in Montana. It took effect at Apr 6, 2011, 6:00 PM MDT. It was in force for 51 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
Apr 6, 2011, 3:40 PM MDT (21:40 UTC)
In effect from
Apr 6, 2011, 6:00 PM MDT
Expired
Apr 8, 2011, 8:57 PM MDT
In force
51 hr
Issued by
NWS Billings, MT

Counties Carbon County, MT, Golden Valley County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT, Wheatland County, MT

The radar

The Billings radar (KBLX), 81 km from the middle of the area, began a volume at 21:45 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.

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 Apr 6, 3:15 PM MDT, 25 minutes earlier.

Area forecast discussion, Apr 6, 3:15 PM MDT, 25 minutes before
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Hazardous weather outlook, Apr 6, 3:13 PM MDT, 27 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
313 PM MDT WED APR 6 2011

MTZ028>042-056>058-063>068-WYZ098-099-072115-
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 BIG HORN MOUNTAINS-SHERIDAN FOOTHILLS-
313 PM MDT WED APR 6 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG SPRING STORM SYSTEM WILL BEGIN TO IMPACT THE
BEARTOOTH/ABSAROKA AND CRAZY MOUNTAINS TONIGHT. SNOW IS EXPECTED
TO BECOME HEAVY AT TIMES LATE TONIGHT MAKING TRAVEL DIFFICULT TO
IMPOSSIBLE IN THE HIGH COUNTRY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A STRONG SPRING STORM SYSTEM WILL MOVE INTO THE LOWER ELEVATIONS
OF SOUTH CENTRAL MONTANA THURSDAY MORNING WITH WIDESPREAD RAIN
SHOWERS. RAIN WILL CHANGE TO SNOW IN THE FOOTHILLS BY MID DAY
THURSDAY AND BECOME HEAVY AT TIMES FROM RED LODGE TO LIVINGSTON TO
SOUTH OF HARLOWTON THURSDAY EVENING. THIS HEAVY SNOW IS EXPECTED
TO CONTINUE THROUGH FRIDAY INTO FRIDAY EVENING BEFORE DIMINISHING.
HEAVY ACCUMULATIONS OF 8 TO 16 INCHES WILL BE POSSIBLE OVER THESE
AREAS WITH THE HIGHEST AMOUNTS SNOW IN THE BEARTOOTH FOOTHILLS AND
AROUND RED LODGE. THIS SNOWFALL WILL RESULT IN NEAR IMPOSSIBLE
DRIVING CONDITIONS ALONG WITH WIDESPREAD TREE AND POWER LINE
DAMAGE. FOR YOUNG LIVESTOCK IN THESE AREAS THIS WILL BE A LIFE
THREATENING EVENT.

FURTHER TO THE EAST CONSIDERABLE UNCERTAINTY REMAINS AS TO HOW
MUCH SNOW WILL FALL. BEST ESTIMATES ARE FOR 3 TO 5 INCHES OF SNOW
TO ACCUMULATE FROM ROUNDUP TO BILLINGS AND COLUMBUS...MAINLY ON
GRASS SURFACES. THIS HEAVY WET SNOW WILL REDUCE VISIBILITY FOR
TRAVELERS AND IS A THREAT TO YOUNG LIVESTOCK. LOCALLY HEAVIER
AMOUNTS ARE POSSIBLE IN THESE AREAS. ROADWAYS SHOULD REMAIN MAINLY
WET DURING THE DAYTIME HOURS THURSDAY AND FRIDAY...WITH MAINLY
SLUSHY CONDITIONS THURSDAY NIGHT AND FRIDAY EVENING.

EAST OF A MILES CITY TO SHERIDAN LINE EXPECT MAINLY RAIN WITH THIS
SYSTEM...WITH SOME SNOW MIXED IN DURING THE NIGHTTIME HOURS.

THIS SNOWFALL WILL BE VERY HEAVY AND WET AS OPPOSED TO NORMAL
WINTER POWDER SNOW. PERSONS SHOULD BE CAREFUL NOT TO INJURE
THEMSELVES SHOVELING THIS TYPE OF SNOW WHERE IT IS MORE THAN A FEW
INCHES DEEP.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 3:40 PM MDTWinter Storm WatchBYZCarbon, Park, Stillwater, Sweet Grass12 hr

Nearby

Winter Storm Warnings in Montana, 2011Every winter storm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.