THE WEATHER PREDICTION CENTER
COLLEGE PARK, MD
STORM SUMMARY MESSAGE
STORM SUMMARY NUMBER 4 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 PM PST WED JAN 18 2017
...A SERIES OF POWERFUL LARGE-SCALE LOW PRESSURE SYSTEMS WILL
BRING COASTAL HEAVY RAIN...HIGH WINDS...AND MOUNTAIN SNOW INTO THE
WESTERN U.S. FOR THE NEXT FEW DAYS...
WINTER STORM WARNINGS...WATCHES...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT FROM THE SOUTHWEST U.S....NORTHWARD THROUGH THE
ENTIRE LENGTH OF THE INTERMOUNTAIN WEST...INCLUDING THE SIERRAS
AND HIGHER ELEVATIONS OF CALIFORNIA...AS WELL AS PARTS OF
SOUTHWESTERN COLORADO.
ICE STORM WARNINGS ARE IN EFFECT FOR SOUTHERN AND CENTRAL
WASHINGTON.
FLOOD WARNINGS...WATCHES...AND ADVISORIES ARE IN EFFECT FOR PARTS
OF WASHINGTON...WESTERN OREGON...AND COASTAL CENTRAL CALIFORNIA.
HIGH WIND WARNINGS AND WIND ADVISORIES ARE IN EFFECT FOR PORTIONS
OF WASHINGTON...OREGON...AND A LARGE PORTION OF CALIFORNIA.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV
AT 600 PM PST...A STRONG JET STREAM ASSOCIATED WITH A DEEP UPPER
LEVEL TROUGH CONTINUED TO DIRECT COPIOUS AMOUNTS OF MOISTURE FROM
THE SUBTROPICAL EASTERN PACIFIC INTO MUCH OF THE WESTERN U.S. THE
ASSOCIATED SURFACE LOW PRESSURE SYSTEM WITH A CENTRAL PRESSURE OF
976 MB...28.82 INCHES WAS APPROACHING VANCOUVER ISLAND IN BRITISH
COLUMBIA WITH A COLD FRONT EXTENDING DOWN THE WEST COAST. NATIONAL
WEATHER SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS INDICATED
RAIN EXTENDING ACROSS THE ENTIRE LENGTH OF THE WEST COAST WITH
HEAVY RAIN MOVING INTO SAN FRANCISCO AND LOS ANGELES METROPOLITAN
AREAS. PRECIPITATION CONTINUED TO EXTEND INLAND ACROSS A GOOD
PORTION OF THE GREAT BASIN AND INTO THE INTERMOUNTAIN WEST WITH
SNOW BEING THE PRIMARY PRECIPITATION TYPE IN THE HIGHER ELEVATIONS.
...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 100 AM PST TUE JAN
17 THROUGH 600 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 600 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
MEACHAM 4 NW 0.13
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 600 PM PST WED JAN 18...
...CALIFORNIA...
MOUNT SHASTA 3 SSE 13.0
WEED 2 SSW 10.0
MOUNT SHASTA 4.0
...IDAHO...
COLBURN 4 WSW 8.0
SPIRIT LAKE 5.0
DOVER 2 SSE 4.0
MOYIE SPRINGS 4.0
OLDTOWN 2 ESE 4.0
...OREGON...
BAKER 1 NE 10.0
HARPER 8.0
ONTARIO 6.0
...WASHINGTON...
MAZAMA 12 W 9.4
WASHINGTON PASS 9.0
GIFFORD 3 W 8.0
LEAVENWORTH 2 SSW 7.0
KETTLE FALLS 6.0
OKANOGAN 2 W 5.3
INCHELIUM 3.0
...SELECTED STORM TOTAL SLEET IN INCHES FROM 100 AM PST TUE JAN 17
THROUGH 600 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...
...CALIFORNIA...
ATWATER 3 NE 51
...OREGON...
NEWPORT 86
MARYS PEAK 84
SEA LION CAVES 81
GARIBALDI 72
SUMMER LAKE 9 SSE 62
ASTORIA 60
...WASHINGTON...
ABERNATHY MOUNTAIN 78
NASELLE 3 NNE 77
CAPE DISAPPOINTMENT 73
LONG BEACH 63
AS POWERFUL LOW PRESSURE SYSTEMS CONTINUE TO MOVE ONSHORE...THE
ENTIRE WEST COAST WILL BE IMPACTED BY AN EXTENDED PERIOD OF HEAVY
PRECIPITATION AND HIGH WINDS INTO THE WEEKEND. THE GREATEST
RAINFALL POTENTIAL IS FORECAST TO BE NEAR COASTAL NORTHERN
CALIFORNIA WHERE 5 TO AS MUCH AS 9 INCHES OF RAIN IS POSSIBLE
THROUGH SATURDAY MORNING. HEAVY SNOW IS EXPECTED FOR THE SIERRA
NEVADA WITH SNOWFALL AMOUNTS OF 2 TO 4 FEET POSSIBLE THROUGH
SATURDAY. WIDESPREAD SNOW...INCLUDING THE LOWER ELEVATIONS...IS
ALSO EXPECTED TO REACH THE INTERMOUNTAIN WEST AND THE ROCKIES BY
THURSDAY...SPREADING INTO 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 100 AM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.
KONG
Last Updated: 1025 PM EST WED JAN 18 2017