Storm Summary Number 4 for Western U.S. Winter Storm
NWS Weather Prediction Center College Park MD
100 AM PST Wed Feb 13 2019

...Heavy rain and snow is falling across northern and central
California, while light to moderate rain and snow continues in the
Pacific Northwest and northern Great Basin...

Winter Storm Warnings and Advisories are in effect for most of the
Northern Rockies, Northern and Central Great Basin, as well as
Oregon, Northern and Central California.

Winter Storm Watches are in effect for the Central Rockies.

Flood and Flash Flood Watches are in effect for portions of
Central and Southern California and northwest Arizona.

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

At 1200 AM PST...A surface low with an estimated central pressure
of 992 mb was located approximately 140 miles off the coast of
northern California. From this low, a stationary front stretched
into central California, with an associated cold front reaching
southwest into another low pressure system in the eastern Pacific.
Ahead of the system, National Weather Service Doppler Radar and
surface observations depict moderate to heavy rain across much of
central and northern California, with snow in the higher
elevations. Light snow and coastal rain was found across the
Pacific Northwest, with light snow impacting the northern Great
Basin as well.

...Selected preliminary Storm Total Snowfall in inches from 1200
AM PST Mon Feb 11 through 1200 AM PST Wed Feb 13...

...CALIFORNIA...
MOUNT SHASTA 3 NW                    14.0                    
RUTH 2 WNW                            6.5                    
ANDERSON                              4.0                    
COBB 2 N                              1.0                    

...IDAHO...
MOYIE SPRINGS 7 NW                   27.0                    
TAMARACK SKI AREA                    26.0                    
BONNERS FERRY                        20.0                    
ELMIRA 9 SE                          17.0                    
MEADOW CREEK 8 W                     16.0                    
MORES CREEK SUMMIT                   16.0                    
LUCERNE 15 SW                        14.0                    
PONDERAY 1 NW                        14.0                    
RATHDRUM 5 N                         13.0                    
CASCADE 1 NNW                        12.0                    
CLAYTON                              12.0                    
DISHMAN 3 SSE                        12.0                    
ATHOL                                 9.0                    
BOGUS BASIN SKI AREA                  9.0                    
IDAHO CITY 9 SW                       7.0                    

...MONTANA...
TROY                                 28.0                    
LIBBY                                15.0                    
HERON                                13.0                    
EUREKA                               11.0                    
ESSEX                                10.0                    
YAAK                                  9.5                    
OLNEY                                 8.0                    
BIGFORK 1 S                           6.0                    
COLUMBIA FALLS                        5.5                    
MISSOULA 5 W                          2.0                    

...OREGON...
HOOD RIVER 2 SW                      18.5                    
CORNUCOPIA 2 ESE                     17.0                    
HALFWAY 3 NE                         13.0                    
MARION FORKS                         13.0                    
BINGHAM SPRINGS 3 NNE                12.0                    
ELGIN 4 WSW                          12.0                    
LA GRANDE                            12.0                    
DEE 3 ESE                            10.5                    
LYLE 3 SW                            10.0                    
PENDLETON                             8.9                    
BRIGHTWOOD 6 N                        7.0                    
DETROIT DAM                           5.0                    
TIMBERLINE                            4.0                    
CLATSKANIE                            3.0                    

...WASHINGTON...
SNOQUALMIE PASS                      27.0                    
TROUT LAKE 1 N                       21.0                    
GLENWOOD 1 NNW                       15.0                    
LOON LAKE                            15.0                    
MOUNT SAINT HELENS                   15.0                    
LUCERNE 15 SW                        14.0                    
CLAYTON                              12.0                    
DISHMAN 3 SSE                        12.0                    
PORT ANGELES                         12.0                    
SKI BLUEWOOD                         12.0                    
SNOWDEN 1 SSW                        12.0                    
SUDDEN VALLEY 1 SE                   12.0                    
AIRWAY HEIGHTS 2 NNE                 10.0                    
NEAH BAY 3 E                          9.0                    
PORT ORCHARD                          9.0                    
OLYMPIA 1 W                           8.0                    
SEATTLE-TACOMA AIRPORT 1 ESE          6.1                    
SEATTLE 5 NNW                         6.0                    
SPOKANE                               6.0                    

...WYOMING...
SOUTH ENTRANCE 8 W                   10.0                    
GRAND TARGHEE                         8.0                    
JACKSON HOLE                          6.0                    

...Selected preliminary Storm Total Rainfall in inches from 1200
AM PST Mon Feb 11 through 1200 AM PST Wed Feb 13...

...OREGON...
TILLAMOOK ARPT                        3.58                    
SCAPPOOSE INDUSTRIAL AIRPARK          3.30                    
PORTLAND-HILLSBORO ARPT               2.81                    
ASTORIA RGNL ARPT                     2.61                    
SOUTHWEST OREGON RGNL ARPT            2.47                    


This current system will slow down and eventually make landfall in
southwest Oregon by early Thursday morning. The low pressure
system in its wake will strengthen and become the dominate low by
Thursday, before making landfall in northern California. Between
now and Saturday morning, 1-2 feet of new snowfall is expected
across the Cascades of Washington and Oregon, with 1-3 feet in the
higher elevations of Idaho, western Montana, northwest Wyoming and
the Shasta and Siskiyou ranges of northern California. The Sierra
Nevada of eastern California is expected to receive 3-5 feet of
new snowfall with locally higher amounts from this system. Such
significant snowfall carries an avalanche risk and threatens to
close major roadways and interstate routes in the area once heavy
snow begins to pile up. At lower elevations, western Oregon and
California coastal ranges are expected to receive 2-5 inches of
rainfall into Thursday evening. The heavy rain could lead to
flooding, especially across the burn scar areas of California. 

The next storm summary will be issued by the Weather Prediction
Center at 100 PM PST. Please refer to your local National Weather
Service office for additional information on this event.

Snell