Snow Squall Warning 11, NWS Cheyenne, WY

Area Forecast Discussion
National Weather Service Cheyenne WY
412 PM MST Sat Feb 8 2020

.SHORT TERM...(Late this afternoon through Sunday night)
Issued at 250 PM MST Sat Feb 8 2020

Early afternoon WV/IR imagery showed the upper level shortwave
trough to affect the CWA moving through MT toward northern WY.
The regional surface analysis placed a low pressure center over
east-central WY, a quasi-stationary front from southeast MT through
northeast WY, the NE Panhandle into western KS. A cold front was
moving into western WY. The pressure gradient was tightest across
central/eastern WY, with strongest west to southwest winds occurring
across the central Laramie Range into Platte County. Peak gusts
recorded thus far were 59 MPH at Bordeaux and 60 MPH at Coleman.
The High Wind Warning for WY Zone 106 remains in effect until 5 PM
MST. Recently cancelled the High Wind Warning for the South Laramie
Range Foothills as wind gusts have struggled to rise above 45 MPH.
Winter Weather Advisories for blowing snow continue through late
this afternoon for WY Zones 110/116 (North Snowy Range Foothills/South
Laramie Range).

Snow showers were developing over western/central WY and western
SD. As the front approaches late this afternoon, the HRRR continues
its depiction of narrow snow band moving east-southeast along the
I-80 corridor in southeast WY. Additional snow showers will spread
east across east-central WY and the northern NE Panhandle through
this evening. Accumulations will range from an inch or less lower
elevations, to 3 to 6 inches above 8500 feet.

Snow showers will taper off for lower elevations Sunday morning,
but linger over higher elevations through the afternoon. Another
inch of snow is possible. After highs in the 40s and lower 50s
Saturday afternoon, it will be 20-25 degrees colder with 700mb
temperatures falling to -14 to -18C. Low temperatures Sunday night
drop into the single digits to lower teens. Below zero temperatures
will be relegated to the more sheltered valleys west of I-25.

.LONG TERM...(Monday through Saturday)
Issued at 250 PM MST Sat Feb 8 2020

Split flow regime continues with closed low over northern Baja CA
Monday ejecting northeast across the southern Rockies Tuesday,
transitioning to an open wave by Wednesday. An active northwest
flow aloft will dominate the CWA through mid-week, becoming near
zonal ahead of another shortwave trough Friday. Temperatures during
the week will continue to average below seasonal normals as a couple
Alberta clippers usher in brief intrusions of Canadian air, along with
some snow showers. Significant accumulations are not expected, however
the higher elevations will receive at least a few inches. The potential
for strong winds returns mid-to-late week with elevated 700/850mb
CAG-CPR and CAG-BRX height gradients and 45-55kt 700-800mb flow.

&&

.AVIATION...(For the 18Z TAFS through 18Z Sunday morning)
Issued at 412 PM MST Sat Feb 8 2020

VFR expected at the terminals this evening though there will be some
snow showers over mainly southeast WY.  Cold front will move across
the area later this evening switching winds out of a northerly
direction with MVFR/IFR cigs developing over most areas mostly
after 06Z with low cigs continuing for much of the day Sunday.

&&

.FIRE WEATHER...
Issued at 250 PM MST Sat Feb 8 2020

Recent snow pack, cold temperatures, non-critical humidities and
periodic chances for more precipitation will preclude fire weather
concerns through much of next week.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Winter Weather Advisory until 5 PM MST this afternoon for WYZ110-
     116.

     High Wind Warning until 5 PM MST this afternoon for WYZ106.

NE...None.
&&

SHORT TERM...MAJ
LONG TERM...MAJ
AVIATION...RE
FIRE WEATHER...MAJ

Hazardous Weather Outlook
National Weather Service Cheyenne WY
1055 AM MST Sat Feb 8 2020

NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119-
091800-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-East Platte County-Goshen County-
Central Laramie County-East Laramie County-
1055 AM MST Sat Feb 8 2020

This hazardous weather outlook is for portions of western
Nebraska...east central Wyoming and southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Another cold front will push across the area this evening. Along
with colder temperatures, a band of moderate to heavy snowfall is
forecast to push southeast across the plains. A snow squall is
also possible with snow accumulations up to one inch this evening
and tonight.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotter activation will not be required.

WYZ103>106-111>115-117-091800-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
Southwest Carbon County-Sierra Madre Range-
Upper North Platte River Basin-Snowy Range-Laramie Valley-
South Laramie Range Foothills-
1055 AM MST Sat Feb 8 2020

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Sustained westerly winds 25 to 35 mph with brief gusts of 45 to
55 mph will continue into the afternoon. Patchy blowing snow will
result in lower visibilities at times.

A cold front will move across the area by this evening bringing
another round of light to moderate snow to the region. Snow
accumulations up to 2 inches are expected, with higher amounts
over the mountains.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotters are encouraged to report snowfall amounts or significant
winter conditions to the National Weather Service in Cheyenne.

WYZ109-110-116-091800-
Central Carbon County-North Snowy Range Foothills-
South Laramie Range-
1055 AM MST Sat Feb 8 2020

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Strong westerly winds of 40 to 50 mph are expected, resulting in
patchy blowing snow reducing visibility at times.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotters are encouraged to report snowfall amounts or significant
winter conditions to the National Weather Service in Cheyenne.

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PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
353 PM MST SAT FEB 8 2020

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

1100 AM     HEAVY SNOW       8 ENE HOG PARK CAMPGROU 41.06N 106.71W
02/08/2020  E28.0 INCH       CARBON             WY   PARK/FOREST SRVC

            BLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 9820 FEET.  SNOW WATER EQUIVALENT IS 1.4 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       11 NW JACK CREEK CAMPGR 41.40N 107.26W
02/08/2020  E12.0 INCH       CARBON             WY   PARK/FOREST SRVC

            SAGE CREEK BASIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 7850 FEET. SNOW WATER EQUIVALENT IS 0.8 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       8 W JACK CREEK CAMPGROU 41.30N 107.27W
02/08/2020  E16.5 INCH       CARBON             WY   PARK/FOREST SRVC

            DIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION
            8880 FEET.  SNOW WATER EQUIVALENT IS 1.1 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS
            OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       3 WNW SUGAR LOAF CAMPGR 41.38N 106.35W
02/08/2020  E52.0 INCH       CARBON             WY   PARK/FOREST SRVC

            MEDICINE BOW SNOTEL IN THE SNOWY RANGE. ELEVATION 10500
            FEET.  SNOW WATER EQUIVALENT IS 2.6 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1.  ACCUMULATION WAS OVER
            PAST 48 HOURS.

1100 AM     HEAVY SNOW       5 ENE ENCAMPMENT        41.24N 106.71W
02/08/2020  E36.0 INCH       CARBON             WY   PARK/FOREST SRVC

            CINNABAR PARK SNOTEL IN THE SNOWY RANGE. ELEVATION 9574
            FEET.  SNOW WATER EQUIVALENT IS 1.8 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 48 HOURS.

1100 AM     HEAVY SNOW       ENE NASH FORK CAMPGROUN 41.36N 106.23W
02/08/2020  E40.0 INCH       ALBANY             WY   PARK/FOREST SRVC

            BROOKLYN LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10240
            FEET.  SNOW WATER EQUIVALENT IS 2.0 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 48 HOURS.

1100 AM     HEAVY SNOW       W DEEP CREEK CAMPGROUND 41.46N 106.28W
02/08/2020  E44.0 INCH       CARBON             WY   PARK/FOREST SRVC

            SAND LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10050
            FEET.  SNOW WATER EQUIVALENT IS 2.2 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 48 HOURS.

1100 AM     HEAVY SNOW       5 WSW SUGAR LOAF CAMPGR 41.33N 106.38W
02/08/2020  E58.0 INCH       CARBON             WY   PARK/FOREST SRVC

            NORTH FRENCH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION
            10130 FEET.  SNOW WATER EQUIVALENT IS 2.9 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       NW RYAN PARK CAMPGROUND 41.33N 106.50W
02/08/2020  E30.0 INCH       CARBON             WY   PARK/FOREST SRVC

            SOUTH BRUSH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION
            8440 FEET.  SNOW WATER EQUIVALENT IS 1.5 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 48 HOURS.

1100 AM     HEAVY SLEET      1 NW WHISKEY PARK       41.01N 106.92W
02/08/2020  E33.00 INCH      CARBON             WY   PARK/FOREST SRVC

            WHISKEY PARK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION
            8950 FEET.  SNOW WATER EQUIVALENT IS 2.2 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS
            OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       4 NW HOG PARK RESERVOIR 41.07N 106.94W
02/08/2020  E28.5 INCH       CARBON             WY   PARK/FOREST SRVC

            LITTLE SNAKE RIVER SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 8915 FEET.  SNOW WATER EQUIVALENT IS 1.9 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       2 WSW BOTTLE CREEK CAMP 41.16N 106.93W
02/08/2020  E16.5 INCH       CARBON             WY   PARK/FOREST SRVC

            WEBBER SPRINGS SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 9250 FEET. SNOW WATER EQUIVALENT IS 1.1 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       2 E BATTLE LAKE         41.15N 106.97W
02/08/2020  E34.0 INCH       CARBON             WY   PARK/FOREST SRVC

            OLD BATTLE SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION
            10000 FEET.  SNOW WATER EQUIVALENT IS 1.7 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       1 NNW BATTLE CREEK CAMP 41.11N 107.17W
02/08/2020  E18.0 INCH       CARBON             WY   PARK/FOREST SRVC

            SANDSTONE RANGER STATION SNOTEL IN THE SIERRA MADRE
            RANGE. ELEVATION 8150 FEET.  SNOW WATER EQUIVALENT IS 1.2
            INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

1100 AM     HEAVY SNOW       7 WSW BATTLE CREEK CAMP 41.05N 107.27W
02/08/2020  E0.0 INCH        CARBON             WY   PARK/FOREST SRVC

            BATTLE MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 7440 FEET.  SNOW WATER EQUIVALENT IS 1.1 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 48 HOURS.

0330 PM     NON-TSTM WND GST 3 ESE ELK MOUNTAIN      41.67N 106.37W
02/08/2020  E62.00 MPH       CARBON             WY   MESONET

            MESONET SITE WIND GUST OF 62MPH, SUSTAINED WIND 32 MPH

&&

ALYONS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
441 PM MST SAT FEB 8 2020

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

0432 PM     SNOW             ARLINGTON               41.59N 106.21W
02/08/2020  E0.0 INCH        CARBON             WY   DEPT OF HIGHWAYS

            SNOW SQUALL OBSERVED AT ARLINGTON. SENSOR REPORTING .08
            MILES IN HEAVY SNOW WITH WIND GUSTS 44 MPH.

0434 PM     SNOW             3 NW ARLINGTON          41.62N 106.24W
02/08/2020  E0.0 INCH        CARBON             WY   DEPT OF HIGHWAYS

            SNOW SQUALL ONGOING. VISIBILITY .14 MILE IN HEAVY SNOW.
            WIND GUSTS AS HIGH AS 55 MPH.

&&

GCLAYCOM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
444 PM MST SAT FEB 8 2020

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

0442 PM     SNOW             7 ESE ARLINGTON         41.55N 106.09W
02/08/2020  E0.0 INCH        CARBON             WY   DEPT OF HIGHWAYS

            SNOW SQUALL ONGOING. VISIBILITY .06 MILE IN HEAVY SNOW.
            WIND GUSTS 51 MPH. COOPER COVE.

&&

GCLAYCOM