Storm Summary Number 6 for Northern Rockies Early Season Snowstorm
NWS Weather Prediction Center College Park MD
900 PM MDT Sun Sep 29 2019

...Moderate to heavy snow continues across portions of northwest
Montana...

A Blizzard Warning is in effect for a part of northwest Montana.
Winter Storm Warnings remain in effect for portions of central and
northwest Montana. Winter Weather Advisories remain in effect for
portions of the Cascades and Sierra-Nevada.

Wind Advisories are in effect for portions of the Rockies.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see www.weather.gov

At 800 PM MDT...A strong upper-level low positioned over the
Northwest U.S. continues to focus multiple waves of surface low
pressure across a large area of the Great Basin and Central
Rockies. Meanwhile, an unusually cold airmass for late September
is in place across the northern Rockies, northern Great Basin, and
northern High Plains, allowing for areas of snow to continue to
fall across these regions. The latest surface observations and
National Weather Service radar continue to show areas of moderate
to locally heavy snow across northwest Montana, with lighter
snowfall seen over portions of eastern Washington and northern
Idaho.

...Selected preliminary Storm Total Snowfall in inches from 600 PM
MDT Fri Sep 27 through 800 PM MDT Sun Sep 29...

...CALIFORNIA...
MEYERS 2 NW                           1.5                    
TAHOE CITY                            1.5                    

...IDAHO...
POST FALLS 4 SSE                      9.0                    
SALMON 2 W                            5.0                    
ATHOL                                 4.0                    
SPIRIT LAKE 3.6 ESE                   4.0                    
COUGAR GULCH                          3.0                    
HUETTER 3 SW                          3.0                    
SANDPOINT                             3.0                    

...MONTANA...
BROWNING                             48.0                    
ST MARY                              38.0                    
DUPUYER CREEK 15 S                   32.0                    
BADGER PASS 25 WSW                   30.0                    
AUGUSTA 15 SW                        25.0                    
EAST GLACIER                         24.0                    
PIKE CREEK                           23.0                    
BYNUM 17 WSW                         22.0                    
HEART BUTTE 14 SW                    21.0                    
GREAT FALLS 5 WSW                    19.3                    
AUGUSTA                              19.0                    
DUTTON                               18.0                    
FAIRFIELD 5 NNE                      16.0                    
KIOWA 3 SW                           15.0                    
CHOTEAU                              14.0                    
LLOYD 13 E                           14.0                    
HAVRE 1 NNE                          12.5                    
CUT BANK                             12.0                    

...NEVADA...
COLD SPRINGS VALLEY 9 NNE             8.0                    

...WASHINGTON...
BOYDS 4 W                            19.0                    
COOPER MOUNTAIN                      11.0                    
METHOW 9 SSW                         11.0                    
COLVILLE 6 ENE                        8.5                    
REPUBLIC 13 E                         6.0                    
SHERMAN PASS                          6.0                    
WAUCONDA 1 ENE                        6.0                    
SPOKANE NWS                           3.1                    

...Selected preliminary Peak Wind gusts in miles per hour earlier
in the event...

...CALIFORNIA...
BIRD SPRINGS PASS                      71                    
WHITE WATER WEST                       64                    
BEAR PEAK                              60                    

...COLORADO...
DOUGLAS PASS                           81                    
CAMEO 4 NE                             65                    
WILDHORSE                              63                    
GREAT DIVIDE 2 SW                      62                    
MEEKER ARPT                            61                    
PINTO                                  56                    
CRAIG-MOFFIT COUNTY AIRPORT            52                    
RIFLE 2 E                              48                    

...MONTANA...
ALZADA 3 SE                            56                    
WHITEFISH 6 N                          55                    
BAKER 1 SSE                            52                    
FINLEY POINT 3 NNW                     42                    

...NEVADA...
LUNDY                                  58                    
MERCURY 3 SW (DESERT ROCK)             58                    
FISH SPRINGS                           49                    

...UTAH...
MOAB 17 NW/CANYONLANDS FIELD ARPT      58                    

...WYOMING...
DAD 10 E                               69                    
DIXON 2 E                              60                    


A surface low pressure system will consolidate and move across the
northern Plains by Monday morning, while the deep upper-level low
remains centered across the Northwest. Snow will continue through
Monday across portions of northwest Montana, which may receive as
much as an additional 6 inches. The heaviest amounts will be
across the Rocky Mountain Front. Elsewhere across the Northwest,
an additional 2 to 6 inches of snow is possible, with northern
portions of the Sierra-Nevada see as much as an additional foot of
snow. Strong winds will continue to result in areas of poor
visibility with blowing snow and drifting snow.

The next Storm Summary will be issued by the Weather Prediction
Center at 300 AM MDT. Please refer to your local National Weather
Service office for additional information on this event.

Orrison