Special Weather Statement

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
407 PM PDT MON MAY 20 2013

WAZ513-518-519-211315-
OLYMPICS-WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
407 PM PDT MON MAY 20 2013

...A CHANGE TO COLD AND WET WEATHER IN THE MOUNTAINS STARTING
TUESDAY AND CONTINUING THROUGH THE WEEK...

COLD AIR WILL MOVE INTO WESTERN WASHINGTON MONDAY NIGHT AND
TUESDAY. THE COLD AIR WILL REMAIN OVER THE AREA THROUGH THE END OF
THE WEEK. THE SNOW LEVEL IN THE MOUNTAINS WILL DROP TO 4500 FEET
TUESDAY AFTERNOON THEN DOWN TO 3500 FEET TUESDAY NIGHT AND
WEDNESDAY.

SNOW WILL ACCUMULATE AT TIMES AT HIGH ELEVATIONS TUESDAY AFTERNOON
THROUGH WEDNESDAY OR THURSDAY. HIGHER HIGHWAY PASSES THAT HAVE
OPENED FOR THE SUMMER...INCLUDING RAINY PASS AND CHINOOK PASS...
WILL LIKELY GET A FEW TO SEVERAL INCHES OF SNOW. STEVENS AND WHITE
PASSES COULD ALSO GET SOME SNOW. LITTLE OR NO SNOWFALL IS FORECAST
FOR SNOQUALMIE PASS.

HIKERS AND CLIMBERS MAY WANT TO POSTPONE ANY TRIPS INTO THE
MOUNTAINS THIS WEEK...ESPECIALLY AT HIGHER ELEVATIONS. IF YOU
GO...BE PREPARED FOR ACCUMULATING SNOW ABOVE 4000 FEET STARTING
LATER TUESDAY AND CONTINUING THROUGH AT LEAST WEDNESDAY NIGHT.

DRIVERS CROSSING THE CASCADES SHOULD CONSIDER USING ONE OF THE
LOWER PASSES SUCH AS SNOQUALMIE PASS. ALLOW EXTRA TIME FOR MOUNTAIN
JOURNEYS THIS WEEK.

$$
BURKE
NATIONAL WEATHER SERVICE SEATTLE

$$

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
217 PM PDT MON MAY 20 2013

CAZ080>085-ORZ021>031-211030-
WESTERN SISKIYOU COUNTY-CENTRAL SISKIYOU COUNTY-
SOUTH CENTRAL SISKIYOU COUNTY-
NORTH CENTRAL AND SOUTHEAST SISKIYOU COUNTY-
NORTHEAST SISKIYOU AND NORTHWEST MODOC COUNTIES-MODOC COUNTY-
SOUTH CENTRAL OREGON COAST-CURRY COUNTY COAST-
CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-
EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY-
SOUTH CENTRAL OREGON CASCADES-
SISKIYOU MOUNTAINS AND SOUTHERN OREGON CASCADES-KLAMATH BASIN-
NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY-
CENTRAL AND EASTERN LAKE COUNTY-
INCLUDING THE CITIES OF...ETNA...FORT JONES...GREENVIEW...YREKA...
WEED...MOUNT SHASTA...DUNSMUIR...MCCLOUD...TENNANT...TULELAKE...
DORRIS...ALTURAS...COOS BAY...NORTH BEND...REEDSPORT...BANDON...
PORT ORFORD...COQUILLE...BROOKINGS...HARBOR...GOLD BEACH...
DRAIN...ELKTON...ROSEBURG...SUTHERLIN...GREEN...MYRTLE CREEK...
CANYONVILLE...GLENDALE...GRANTS PASS...CAVE JUNCTION...
STEAMBOAT...TOKETEE FALLS...MEDFORD...ASHLAND...CRATER LAKE...
CRESCENT LAKE...DIAMOND LAKE...UNION CREEK...HOWARD PRAIRIE...
SISKIYOU SUMMIT...ALTAMONT...KLAMATH FALLS...BEATTY...BLY...
CHEMULT...CRESCENT...GILCHRIST...SPRAGUE RIVER...LAKEVIEW
217 PM PDT MON MAY 20 2013

...UNSEASONABLY COLD TEMPERATURES AND PASS LEVEL SNOW EXPECTED
THIS WEEK...

A POTENT COLD FRONT WILL SWEEP THROUGH SOUTHERN OREGON AND
NORTHERN CALIFORNIA TUESDAY AFTERNOON AND EVENING...BRINGING AN
UNSEASONABLY COLD AIR MASS TO THE AREA. STRONG GUSTY WINDS AND
WIDESPREAD PRECIPITATION WILL ACCOMPANY THE FRONT AS IT
PASSES THROUGH...AND TEMPERATURES WILL FALL SHARPLY.

SNOW LEVELS ARE EXPECTED TO DROP TO AROUND 2500 FEET BY WEDNESDAY
MORNING...BRINGING IN 2 TO 5 INCHES OF SNOW OVER
ALL CASCADE PASSES...SISKIYOU SUMMIT...AND THE MOUNT SHASTA AREA.
SNOW AMOUNTS OF OVER A FOOT ARE POSSIBLE ON THE HIGHER PORTIONS OF
BEAR CAMP ROAD. SNOW LEVELS MAY DROP BRIEFLY DOWN TO LOWER PASSES
LIKE SEXTON SUMMIT AS WELL. HOWEVER...WITH THE LONGER DAYS AND
HIGHER SUN ANGLES SOIL AND ROAD TEMPERATURES ARE QUITE
WARM...AND IT WILL BE DIFFICULT FOR SNOW TO ACCUMULATE.

COLD NIGHTTIME TEMPERATURES WILL BRING BELOW FREEZING TEMPERATURES
EAST OF THE CASCADES TUESDAY AND WEDNESDAY NIGHT. TEMPERATURES IN
PLACES EAST OF THE CASCADES MAY DROP INTO THE MID TO LOWER
20S...POSSIBLY CAUSING UNPROTECTED EXPOSED PIPES TO BURST.

STAY TUNED TO YOUR LOCAL NATIONAL WEATHER SERVICE FORECASTS FOR
UPDATES AS THE SYSTEM PROGRESSES.

$$
SVEN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PORTLAND OR
115 PM PDT MON MAY 20 2013

ORZ001>014-WAZ019>023-039-040-211400-
NORTH OREGON COAST-CENTRAL OREGON COAST-
COAST RANGE OF NORTHWEST OREGON-
CENTRAL COAST RANGE OF WESTERN OREGON-LOWER COLUMBIA-
GREATER PORTLAND METRO AREA-CENTRAL WILLAMETTE VALLEY-
SOUTH WILLAMETTE VALLEY-WESTERN COLUMBIA RIVER GORGE-
NORTHERN OREGON CASCADE FOOTHILLS-NORTHERN OREGON CASCADES-
CASCADE FOOTHILLS IN LANE COUNTY-CASCADES IN LANE COUNTY-
UPPER HOOD RIVER VALLEY-SOUTH WASHINGTON CASCADES-WILLAPA HILLS-
SOUTH WASHINGTON COAST-I-5 CORRIDOR IN COWLITZ COUNTY-
GREATER VANCOUVER AREA-SOUTH WASHINGTON CASCADE FOOTHILLS-
INCLUDING THE CITIES OF...ASTORIA...CANNON BEACH...TILLAMOOK...
LINCOLN CITY...NEWPORT...FLORENCE...VERNONIA...JEWELL...TRASK...
GRANDE RONDE...TIDEWATER...SWISSHOME...ST. HELENS...CLATSKANIE...
HILLSBORO...PORTLAND...OREGON CITY...GRESHAM...SALEM...
MCMINNVILLE...DALLAS...EUGENE...CORVALLIS...ALBANY...HOOD RIVER...
CASCADE LOCKS...MULTNOMAH FALLS...SANDY...
SILVER FALLS STATE PARK...SWEET HOME...GOVERNMENT CAMP...
DETROIT...SANTIAM PASS...VIDA...LOWELL...COTTAGE GROVE...
MCKENZIE BRIDGE...OAKRIDGE...WILLAMETTE PASS...PARKDALE...ODELL...
COLDWATER RIDGE VISITORS CENTER...MOUNT ST. HELENS...FRANCES...
RYDERWOOD...RAYMOND...LONG BEACH...CATHLAMET...LONGVIEW...KELSO...
CASTLE ROCK...STEVENSON...SKAMANIA...VANCOUVER...BATTLE GROUND...
WASHOUGAL...TOUTLE...ARIEL...COUGAR
115 PM PDT MON MAY 20 2013

...MUCH COOLER WEATHER EXPECTED TUESDAY WITH PASS LEVEL SNOW BY
WEDNESDAY...

A COLD LOW PRESSURE SYSTEM WILL BEGIN SPREADING LIGHT RAIN ACROSS
SOUTHWEST WASHINGTON AND NORTHWEST OREGON LATE TONIGHT INTO TUESDAY
MORNING. THERE WILL BE A DRASTIC CHANGE IN TEMPERATURES TUESDAY...
AS MANY LOCATIONS WILL SEE TEMPERATURES 20 DEGREES COOLER THAN THOSE
EXPERIENCED MONDAY.

SNOW LEVELS WILL START OUT HIGH...ABOVE 8000 FEET MONDAY EVENING...
THEN LOWER BELOW 4000 FEET BY LATE TUESDAY EVENING. SNOW
ACCUMULATIONS ARE EXPECTED TO REMAIN BELOW ADVISORY CONDITIONS WITH
2 TO 4 INCHES EXPECTED BETWEEN 3000 AND 6000 FEET TUESDAY NIGHT
THROUGH WEDNESDAY. HIGHER SNOW AMOUNTS...6 TO 9 INCHES ARE LIKELY
ABOVE 6000 FEET.

SHOWERS AT LOWER ELEVATIONS MAY INCLUDE SMALL HAIL TUESDAY AFTERNOON
THROUGH WEDNESDAY...POTENTIALLY RESULTING IN EXTRA SLICK ROADWAYS.

DRIVERS SHOULD USE EXTRA CAUTION...ESPECIALLY WHILE DRIVING OVER
THE CASCADE PASSES OR ENCOUNTERING SMALL HAIL ON THE ROADS. SLOW
DOWN AND LEAVE PLENTY OF ROOM BETWEEN CARS.

HIKERS AND CLIMBERS VENTURING INTO THE MOUNTAINS WILL WANT TO BE
PREPARED FOR A QUICK CHANGE TO COLD AND WET WEATHER TUESDAY...
ESPECIALLY FOLLOWING A DECEPTIVELY WARM AND SUNNY MONDAY. FROM 3000
FEET AND UP...BE PREPARED FOR ACCUMULATING SNOW STARTING LATER
TUESDAY AND CONTINUING THROUGH AT LEAST WEDNESDAY NIGHT.

FOR MORE WEATHER INFORMATION FROM NOAA`S NATIONAL WEATHER SERVICE
VISIT...  HTTP://WEATHER.GOV/PORTLAND (ALL LOWER CASE)

$$