Funnel Cloud in Oregon, June 5, 2001

NORTHWEST OREGON AND SOUTHWEST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
300 PM PDT TUE JUN 5 2001

AS EXPECTED THIS MORNING...WAVE IS PUSHING THROUGH OREGON AND BACK
EDGE OF STEADY PRECIPITATION AND DEEPER CLOUDS COMING ONSHORE. WILL
JUST GO WITH DECREASING SHOWERS TONIGHT. FLOW ALOFT BACKS TO
SOUTHWEST TONIGHT AND WEDNESDAY...AND SHOULD SEE SOME SUN BREAKS
WEDNESDAY AFTERNOON AS SURFACE HIGH BUILDS IN TO THE NORTH.

OF CONCERN NEXT IS JET AND BATCH OF MOISTURE ALONG 40N BETWEEN 130W
AND 150W. MODELS SAY THIS ROTATES OVER OUT FORECAST AREAS WEDNESDAY
NIGHT...THEN LIFTS OUT THURSDAY. FOR NOW WILL GO MOSTLY CLOUDY WITH A
CHANCE OF MOUNTAIN SHOWERS AND KEEP THE VALLEYS DRY.

IN THE EXTENDED PERIOD...FRIDAY IS MUCH LIKE THURSDAY WITH SOME
MORNING CLOUDS IN ONSHORE FLOW THEN SOME AFTERNOON SUNSHINE. THE REST
OF THE WEEKEND MORE MUDDIED...AS LOW IN WESTERN GULF OF ALASKA
APPROACHES AND INCREASES THE THREAT FOR SHOWERS. ONE SHORT WAVE
ROTATES THROUGH AT LEAST THE NORTHWEST PART OF THE FORECAST AREA
FRIDAY NIGHT AND EARLY SATURDAY. THEN MODELS DIVERGE SOME ON THE
LOW...WITH THE MRF SHEARING IT INLAND ACROSS SOUTHERN CANADA...THE
ECMWF BRINGING IT FARTHER SOUTH INTO WASHINGTON AND OREGON...AND THE
UKMET IN BETWEEN. MRF ENSEMBLES HAVE ENOUGH SPREAD TO SUPPORT EITHER
IDEA. SO HAVE OPTED FOR NOW TO LUMP DAYS 4 THROUGH 7 TOGETHER WITH
THE BROAD BRUSH CHANCE OF SHOWERS.

FRONT COMING ONSHORE OFFSHORE AND THUS WITH WINDS BECOMING WEST WILL
DROP SMALL CRAFT ADVISORY. TOLLESON
AST 6311 PDX 6211 SLE 5211 EUG 4211

.KPDX...NONE.