THE WEATHER PREDICTION CENTER
COLLEGE PARK, MD
STORM SUMMARY MESSAGE
STORM SUMMARY NUMBER 03 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 PM PST WED JAN 18 2017
...STRONG MULTIFACETED WINTER STORM PRODUCING WIDESPREAD
RAIN...ICE...AND SNOW FOR THE NORTHWEST AND CALIFORNIA...
WINTER STORM WARNINGS...WATCHES...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT FROM THE SOUTHWEST U.S....NORTHWARD ACROSS THE
INTERMOUNTAIN WEST AND NORTHERN ROCKIES...AND INTO THE SIERRAS OF
CALIFORNIA.
ICE STORM WARNINGS ARE IN EFFECT FOR MUCH OF CENTRAL WASHINGTON
AND PARTS OF NORTHERN OREGON.
FLOOD WARNINGS...WATCHES...AND ADVISORIES ARE IN EFFECT FOR THE
LOWER ELEVATIONS OF WASHINGTON...WESTERN OREGON...AND WESTERN
CALIFORNIA.
HIGH WIND WARNINGS ARE IN EFFECT FOR PORTIONS OF
WASHINGTON...OREGON...AND NORTHERN CALIFORNIA.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV
AT 1200 PM PST...AN LARGE UPPER LEVEL LOW REMAINED OFFSHORE AND
WAS APPROACHING THE PACIFIC NORTHWEST. THE STRONGEST SURFACE LOW
PRESSURE SYSTEM ASSOCIATED WITH THIS UPPER LEVEL FEATURE HAD A
CENTRAL PRESSURE OF 965 INCHES...28.53 INCHES AND WAS LOCATED
OFFSHORE OF BRITISH COLUMBIA. A COLD FRONT EXTENDED INTO THE
EASTERN PACIFIC EAST OF THIS LOW...AHEAD OF WHICH WAS A DEEP SURGE
OF PACIFIC MOISTURE REACHING THE WEST COAST. NATIONAL WEATHER
SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS INDICATED
WIDESPREAD MODERATE TO HEAVY RAIN ONGOING ACROSS NORTHERN AND
CENTRAL CALIFORNIA AND THE LOWER ELEVATIONS OF WESTERN WASHINGTON
AND WESTERN OREGON. ICING WAS ONGOING FOR MANY OF THE INTERIOR
VALLEYS OF CENTRAL WASHINGTON FROM PERSISTENT FREEZING RAIN AND
SURFACE TEMPERATURES THAT ARE WELL BELOW FREEZING. MIXED
PRECIPITATION WAS OCCURRING IN THE NORTHERN GREAT BASIN AND
PORTIONS OF THE NORTHERN ROCKIES...WITH SNOW FALLING IN THE HIGHER
ELEVATIONS OF THE NORTHERN ROCKIES AND THE HIGHEST PEAKS OF THE
SIERRAS.
...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 100 AM PST TUE JAN
17 THROUGH 1200 PM PST WED JAN 18...
...OREGON...
GOLD BEACH 6 E 2.57
PISTOL RIVER 2 SSE 2.34
ASTORIA 2.32
OBRIEN 2 SSW 1.98
BROOKINGS 5 NNW 1.50
SALEM 0.87
PORTLAND 0.66
...WASHINGTON...
SNOKOMISH 2 N 6.47
MOUNT OLYMPUS 12 W 5.91
HAMILTON 12 NNE 5.70
SUMNER 3 NE 5.46
JEFFERSON CREEK 5.43
HAYWIRE RIDGE 5.42
HUMPTULLIPS 5.42
ELK MEADOWS 5.34
HAGER CREEK 5.32
MOUNT BAKER 7 S 5.10
HOODSPORT 3 WNW 5.00
MATLOCK 4.97
FORKS 4.52
QUILLAYUTE 4.51
VERLOT 4.50
AUBURN 1 NNE 3.94
BREMERTON NATIONAL ARPT 3.38
FORTSON 1 NNW 3.37
TRACYTON 2 NE 3.00
SHELTON/SANDERSON FIELD ARPT 2.89
SEATTLE/TACOMA INTL ARPT 2.68
HOQUIAM/BOWERMAN AIRPORT 1.94
...SELECTED STORM TOTAL FREEZING RAIN ICE AMOUNTS IN INCHES FROM
100 AM PST TUE JAN 17 THROUGH 1200 PM PST WED JAN 18...
...IDAHO...
KENDRICK 2.5 N 0.50
...OREGON...
HOOD RIVER 1.50
TROUTDALE AIRPORT 1.08
PORTLAND AIRPORT 0.64
HERMISTON 2 N 0.25
PAULINA 6 E 0.10
...WASHINGTON...
BONNEVILLE 3 N 2.00
STEVENSON 1.00
UNDERWOOD 1.00
SKAMANIA 1 W 0.75
EPHRATA 0.60
SOAP LAKE 0.50
VANCOUVER LAKE 2 E 0.46
EAST WENATCHEE 1 NNE 0.25
GRANDVIEW 0.25
NORTH BEND 6 E 0.25
SPOKANE 3 NNW 0.25
THE DALLES 8 NNE 0.25
YAKIMA 2 WNW 0.25
AIRWAY HEIGHTS 0.20
...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 100 AM PST TUE JAN
17 THROUGH 1200 PM PST WED JAN 18...
...IDAHO...
COLBURN 4 WSW 8.0
SPIRIT LAKE 5.0
DOVER 2 SSE 4.0
MOYIE SPRINGS 4.0
OLDTOWN 2 ESE 4.0
...WASHINGTON...
MAZAMA 12 W 9.4
WASHINGTON PASS 9.0
GIFFORD 3 W 8.0
LEAVENWORTH 2 SSW 7.0
KETTLE FALLS 6.0
INCHELIUM 3.0
...SELECTED STORM TOTAL SLEET IN INCHES FROM 100 AM PST TUE JAN 17
THROUGH 1200 PM PST WED JAN 18...
...OREGON...
SPOKANE 0.80
ECHO 0.50
...WASHINGTON...
WENATCHEE 3.00
COULEE CITY 2.00
QUINCY 1.00
SE KENNEWICK 0.50
...SELECTED PEAK WIND GUSTS IN MILES PER HOUR EARLIER IN THE
EVENT...
...OREGON...
NEWPORT 86
MARYS PEAK 84
SEA LION CAVES 81
GARIBALDI 72
ASTORIA 60
...WASHINGTON...
ABERNATHY MOUNTAIN 78
NASELLE 3 NNE 77
CAPE DISAPPOINTMENT 73
LONG BEACH 63
AS THE UPPER LEVEL LOW AND ASSOCIATED SURFACE FRONTS MOVE
SOUTHEASTWARD...THE SIGNIFICANT PRECIPITATION EVENT IS EXPECTED TO
CONTINUE OVER THE NEXT FEW DAYS. THE GREATEST RAINFALL TOTALS
THROUGH SATURDAY ARE EXPECTED OVER COASTAL CALIFORNIA...WHERE 4 TO
LOCALLY 6 INCHES OF RAINFALL IS POSSIBLE. HEAVY SNOW IS EXPECTED
FOR THE SIERRA NEVADA MOUNTAINS WITH SNOWFALL AMOUNTS OF 2 TO 4
FEET POSSIBLE THROUGH SATURDAY. WIDESPREAD SNOW...INCLUDING FOR
LOWER ELEVATIONS...IS ALSO EXPECTED TO REACH THE INTERMOUNTAIN
WEST AND THE ROCKIES BY THURSDAY...AS WELL AS THE SOUTHWEST BY
THURSDAY NIGHT AS THE STORM SYSTEM MOVES INLAND. THE THREAT OF ICE
WILL CONTINUE THROUGH TONIGHT FOR CENTRAL WASHINGTON AND OREGON
AND INTO SOUTHERN IDAHO...BUT IS EXPECTED TO WIND DOWN BY THURSDAY
AFTERNOON.
THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 700 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.
TATE
Last Updated: 359 PM EST WED JAN 18 2017