The Weather Prediction Center
College Park, MD
Storm Summary Message
Storm Summary Number 4 for Western and Central U.S. Major Winter
Storm System
NWS Weather Prediction Center College Park MD
700 PM PST Tue Dec 14 2021
...Atmospheric River continues to bring heavy rain and snow to
California as a broader snow and high wind threat expands across
the western and central U.S.....
Winter Storm Warnings are in effect for the Sierra Nevada and
Transverse and Peninsular ranges of California, portions of the
Sierra Nevada and Great Basin in Nevada, the Sawtooth Mountains in
Idaho, southwest Montana, the Wasatch and Uinta mountains in Utah,
the Mogollon Rim and northeastern Arizona, and the San Juan
Mountains of Colorado.
High Wind Warnings are in effect for the Transverse and Peninsular
Ranges of California, the Mogollon Rim and northeastern Arizona,
the Wyoming Basin, the High and Central Plains of the Texas
Panhandle, Oklahoma Panhandle, Colorado, Kansas, Wyoming,
Nebraska, South Dakota, the Mid-Missouri Valley and the western
Great Lakes.
Red Flag Warnings are in effect for northeastern New Mexico and
extreme south-central Kansas.
High Wind Watches are in effect for portions of the Texas
Panhandle through the eastern Oklahoma panhandle and the Upper
Great Lakes.
Winter Weather Advisories are in effect for the coastal ranges and
Cascades of Oregon, southwestern Washington, northern Great Basin
of Nevada, portions of the Northern and Central Rockies, the High
Plains of Montana, and northeastern South Dakota.
Wind Advisories are in effect for southern California,
south-eastern Utah, southern Arizona, the Rio Grande Valley of New
Mexico, north-central Texas, the Mid-Mississippi valley and
central Minnesota.
For a detailed graphical depiction of the latest watches, warnings
and advisories, please see www.weather.gov
At 600 PM PST...A broad, deep upper-level trough has slowly
progressed eastward over the West Coast. At the surface, an
eastward meandering frontal boundary extended across the central
and western U.S. from the northern Plains west through the
Northern Rockies before turning south through the Great Basin and
into central California. Significant moisture associated with an
Atmospheric River continued to spread inland behind and across
this boundary. Widespread areas of heavy rain and higher elevation
snow showers were ongoing along and ahead of the frontal boundary
across the Northern Rockies in Montana and Idaho, the Great Basin
in Utah, and south into southern Nevada and western Arizona. The
heaviest precipitation has moved east of the Los Angeles metro
area and southern California, with strong winds possible in its
wake, subsiding overnight.
...Selected preliminary Storm Total Snowfall in inches from 800 AM
PST Sat Dec 11 through 600 PM PST Tue Dec 14...
...CALIFORNIA...
PINECREST 2 E 60.0
SODA SPRINGS 1 ENE 54.8
BEAR VALLEY 2 N 54.0
HEAVENLY SKI BASE 50.0
PALISADES TAHOE SKI BASE 50.0
MAMMOTH MOUNTAIN SKI 48.0
HOMEWOOD MOUNTAIN SKI 45.0
NORTHSTAR SKI BASE 1 SSW 44.0
KINGVALE 1 WSW 34.0
CASTLE PEAK 25.0
SUGAR BOWL 24.0
SIERRA SNOW LAB 23.5
CENTRAL SIERRA SNOW LAB 18.7
KIRKWOOD 18.0
MOUNT SHASTA 6 ENE 13.0
...IDAHO...
DONNELLY 3 SSW 20.0
NEW MEADOWS 2 NNW 19.5
WEST YELLOWSTONE 6 WNW 18.0
HAILEY 2 NNW 17.0
ELK RIVER 15.0
GANNETT 10 NE 14.0
HORSESHOE BEND 11 SSE 13.0
PIONEERVILLE 9 ESE 12.0
BELLEVUE 1 WSW 11.0
ARCO 7.0
WOODLAND 1 E 6.5
...MONTANA...
DUPUYER 23 SW 12.0
NOXON 12 NE 12.0
...NEVADA...
INCLINE VILLAGE 1 NNW 26.5
MT. ROSE SKI BASE 3 NE 15.0
GARDNERVILLE RANCH 3 WSW 14.5
...OREGON...
SUMMIT LAKE 33.0
TIMBERLINE LODGE 31.0
MOUNT HOOD MEADOWS 28.0
SANTIAM PASS 25.0
GOVERNMENT CAMP 18.0
HALFWAY 9 NNW 18.0
WHITE RIVER 18.0
CRATER LAKE 1 SW 16.0
JOSEPH 3 S 15.0
SADDLE MOUNTAIN 14.0
SALT CREEK FALLS 13.0
TOLLGATE 13.0
CRESCENT 1 W 10.0
SUMPTER 6 N 9.0
CLACKAMAS LAKE 8.0
HAYES HILL 6.0
...WASHINGTON...
SWIFT CREEK 27.0
LONE PINE 26.0
JUNE LAKE 25.0
SPIRIT LAKE 21.0
SPENCER MEADOW 19.0
WINTON 3 NW 14.0
LUCERNE 9 W 10.5
MAZAMA 2 NW 8.3
EASTON 6 NNW 7.0
STEVENS PASS 6.0
...Selected preliminary Storm Total Rainfall in inches from 800 AM
PST Sat Dec 11 through 600 PM PST Tue Dec 14...
...CALIFORNIA...
MOUNT TAMALPAIS 8.74
SCOTTS VALLEY 6.05
SCOTT CREEK 5.84
WOODACRE 5.84
BEN LOMOND 5.68
PARADISE 1.1 W 5.53
KENTFIELD 5.36
STRAWBERRY VALLEY 5.30
GASQUET 4.86
RED MOUND 4.56
DOWNIEVILLE 4.53
FLYNN PRAIRIE 4.37
DE SABLA 3.93
SPRING VALLEY 3.86
WHISKEYTOWN 1.6 S 3.80
AMERICAN HOUSE 7.6 SW 3.76
SIMS 3.51
ELMIRA 3.25
BLUE CANYON 3.18
ARNOLD 2.40
SAN FRANCISCO 2.37
SACRAMENTO 1.49
...OREGON...
SOUTH SLOUGH ESTUARY COOS BAY 2.81
PORT ORFORD 4.7 E 2.34
SELMA 2.28
MURPHY 1 SSE 1.54
BANDON 3 NE 1.42
GLENDALE 1.39
...Selected preliminary Peak Wind gusts in miles per hour earlier
in the event...
...CALIFORNIA...
MAGIC MOUNTAIN TRUCK TRAIL 89
LAGUNA LAUNCH 88
RUNNING SPRINGS 2 NW 84
ACTON 8 NW 82
GRAPEVINE PEAK 82
SIERRA PELONA WEST 82
BIG PINES 1 E 81
FALCON RD 68
TV TOWERS RD 2 68
JOAQUIN RIDGE 65
LAS YEGUAS 62
DE LA CONCEPCION 60
CRANE FLAT 58
SAN LUIS OBISPO 2 ENE 58
VENTURA GOVT CENTER 58
CHOLAME 57
SADDLE PEAK 57
MILLER RANCH 55
CUYAMA VALLEY 52
...IDAHO...
POCATELLO REGIONAL AIRPORT 68
TWIN FALLS 6 S 67
GRANGEVILLE 2 N 60
WINCHESTER 5 NW 59
...MONTANA...
EAST GLACIER PARK 8 SE 92
BYNUM 14 W 86
WILSALL 17 NE 78
SUNBURST 75
DENTON 7 ENE 68
LIVINGSTON 2 WSW 68
ZORTMAN 10 ESE 65
GREAT FALLS 5 WSW 62
...NEVADA...
TIMBER MOUNTAIN 81
KINGS RIVER VALLEY 11 ESE 71
WARM SPRINGS 71
ELKO 4 WSW 59
...OREGON...
LINCOLN CITY 93
YAQUINA BAY BRIDGE 78
HEBO 5 ESE 75
YACHATS 2 SE 72
ASTORIA 1 W 68
ROCKHOUSE RAWS 61
GARIBALDI 2 WNW 59
SALEM AIRPORT 47
PORTLAND 45
...SOUTH DAKOTA...
SPEARFISH 3 SE 56
...UTAH...
SNOWBASIN 89
OGDEN PEAK 82
REYNOLDS PEAK 80
SANDY 72
SIGNAL PEAK 69
UPPER CEDAR MOUNTAIN 67
WINDY PEAK 64
I-15 AT HMILTONS FORT 61
TOOELE 2 58
TULE VALLEY 57
FREMONT ISLAND - MILLER HILL 52
COTTONWOOD MOUNTAIN 41
...WASHINGTON...
RICHLAND 22 NNW 78
WALLA WALLA AIRPORT 62
POMEROY 58
LOOMIS 5 S 49
SPOKANE SOUTH HILL 42
...WYOMING...
BORDEAUX 1 SSE 88
CASPER 2.1 SW 88
ARLINGTON 7 ESE 85
RED CANYON - SOUTH PASS 82
CLARK 80
CENTENNIAL 2 WNW 77
I25 - HAT SIX 77
MILLS 6 NW 66
CHEYENNE 1 NW 64
BIG HORN 17 WSW 60
GELNROCK 1 S 58
Heavy precipitation in the form of both rain and snow has subsided
in southern California as the heaviest axis has progressed
eastward towards the central Great Basin and northern Rockies.
Another batch of heavy precipitation is possible for central and
northern California through Thursday morning as another surge of
moisture associated with a weak low-pressure system moves eastward
towards the Pacific Northwest. An additional 1-3 feet of snow is
possible for the Sierra Nevada range, with 1-2 inches of rain in
lower elevations. Higher elevations in the Central Great Basin and
North and Central Rockies may see 12+ inches of snow through
Wednesday night as the eastward moving moisture associated with
the upper-level trough interacts with the frontal boundary draped
across the region. Lighter accumulations are possible elsewhere at
lower elevations. Additionally, a broader high wind threat will
expand across the Plains in advance of the upper-level trough
moving eastward. A deepening low-pressure system over the Northern
High Plains on Wednesday will lead to widespread gusts of 60 to 70
mph across a broad area of the central Plains and Mississippi
Valley, which may result in damage and power outages. Dry
conditions across the Plains will also lead to the threat of
wildfires on Wednesday.
The next Storm Summary will be issued by the Weather Prediction
Center at 700 AM PST. Please refer to your local National Weather
Service office for additional information on this event.
Russell
Last Updated: 1005 PM EST TUE DEC 14 2021