STORM SUMMARY NUMBER 1 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 AM PST WED JAN 18 2017

...STRONG MULTI-FACETED WINTER STORM PRODUCING WIDESPREAD
RAIN...ICE...AND SNOW FOR THE PACIFIC NORTHWEST...

FLOOD WATCHES ARE IN EFFECT FOR THE LOWER ELEVATIONS OF WESTERN
WASHINGTON AND OREGON.

HIGH WIND WARNINGS ARE IN EFFECT FOR WESTERN WASHINGTON AND OREGON.

WINTER WEATHER ADVISORIES ARE IN EFFECT FROM NORTHERN NEVADA TO
WESTERN MONTANA.

ICE STORM WARNINGS ARE IN EFFECT FOR MUCH OF CENTRAL WASHINGTON
AND PARTS OF NORTHERN OREGON.

WINTER STORM WARNINGS ARE IN EFFECT FOR THE MOUNTAINS OF CENTRAL
AND NORTHERN CALIFORNIA...EASTERN PORTIONS OF WASHINGTON AND
OREGON...AND EXTENDING INTO IDAHO AND EXTREME WESTERN MONTANA.

FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 100 AM PST...WIDESPREAD MODERATE TO HEAVY PRECIPITATION HAS NOW
MOVED INLAND ACROSS MUCH OF WASHINGTON...OREGON...AND NORTHERN
CALIFORNIA AHEAD OF A STRONG STORM SYSTEM OFFSHORE.  A 968MB
SURFACE LOW WAS ANALYZED NORTHWEST OF VANCOUVER ISLAND WITH A
TRAILING COLD FRONT EXTENDING SOUTHWARD FROM THE LOW.  AHEAD OF
THE FRONT IS A DEEP SURGE OF PACIFIC MOISTURE REACHING THE WEST
COAST.  NATIONAL WEATHER SERVICE DOPPLER RADARS AND SURFACE
OBSERVATIONS INDICATE MODERATE TO LOCALLY HEAVY RAIN IS ONGOING
ACROSS THE LOWER ELEVATIONS OF WESTERN WASHINGTON...WESTERN
OREGON...AND NORTHERN CALIFORNIA.  SEVERE ICING CONTINUES FOR MANY
OF THE INTERIOR VALLEYS OF CENTRAL WASHINGTON AND NORTHERN OREGON
FROM PERSISTENT FREEZING RAIN AND SURFACE TEMPERATURES THAT ARE
WELL BELOW FREEZING.  SNOW IS FALLING AT ONLY THE HIGHEST
ELEVATIONS OF THE CASCADES.

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 100 AM PST TUE JAN
17 THROUGH 100 AM PST WED JAN 18...

...OREGON...
ASTORIA                               1.73                    
SALEM                                 0.87                    
PORTLAND                              0.66                    

...WASHINGTON...
QUILLAYUTE                            2.62                    
SEATTLE                               1.64                    
HOQUIAM                               1.40                    

...SELECTED STORM TOTAL FREEZING RAIN ICE AMOUNTS IN INCHES FROM
100 AM PST TUE JAN 17 THROUGH 100 AM PST WED JAN 18...

...OREGON...
PAULINA 6 E                           0.10                    

...WASHINGTON...
STEVENSON                             1.00                    
SKAMANIA 1 W                          0.75                    
THE DALLES 8 NNE                      0.25                    
YAKIMA 2 WNW                          0.25                    

...SELECTED PEAK WIND GUSTS IN MILES PER HOUR EARLIER IN THE
EVENT...

...OREGON...
NEWPORT                               86                    
MARYS PEAK                            84                    
GARIBALDI                             72                    
ASTORIA                               60                    

...WASHINGTON...
ABERNATHY MOUNTAIN                    78                    
NASELLE 3 NNE                         77                    
CAPE DISAPPOINTMENT                   73                    
LONG BEACH                            63                    


THE LATEST FORECAST CALLS FOR THIS SIGNIFICANT PRECIPITATION EVENT
TO CONTINUE OVER THE NEXT COUPLE OF DAYS...WITH THE AXIS OF
HEAVIEST PRECIPITATION MOVING SOUTHWARD ACROSS NORTHERN AND
CENTRAL CALIFORNIA BY WEDNESDAY NIGHT AND THURSDAY MORNING.  THE
GREATEST RAINFALL TOTALS THROUGH THURSDAY MORNING ARE EXPECTED
OVER THE COASTAL RANGES OF SOUTHWEST OREGON AND NORTHWEST
CALIFORNIA...WHERE AS MUCH AS 4 TO 8 INCHES OF RAINFALL IS
POSSIBLE.  HEAVY SNOW IS EXPECTED FOR THE SIERRA NEVADA MOUNTAINS
WITH SNOWFALL AMOUNTS LIKELY EXCEEDING A COUPLE FEET.  LOCALLY
SIGNIFICANT FREEZING RAIN AND SOME SNOW IS EXPECTED ACROSS THE
NORTHERN GREAT BASIN...WITH WIDESPREAD HEAVY SNOW IMPACTING THE
CENTRAL AND NORTHERN ROCKIES AS THE STORM SYSTEM MOVES INLAND.

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.

HAMRICK