National Weather Service Raw Text Product

950 
FXUS66 KPQR 291633
AFDPQR

NORTHWEST OREGON AND SOUTHWEST WASHINGTON FORECAST DISCUSSION 
NATIONAL WEATHER SERVICE PORTLAND OR
830 AM PST TUE OCT 29 2002

.SYNOPSIS...A CANADIAN COLD FRONT WILL MOVE SOUTHWEST THROUGH THE
AREA TODAY USHERING IN AN UNSEASONABLY COLD AIR MASS. THE COOL AIR
WILL LINGER INTO THU BEFORE MODERATING FOR THE WEEKEND.

.DISCUSSION...
.SHORT TERM...E-W ORIENTED UPPER TROUGH TO DROP SOUTH TO AROUND
OR-WA-ID BORDER TODAY THEN PERSISTS THROUGH THU NO NEW MESO ETA.
MODELS HAVE BEEN CONSISTENT IN USHERING IN A COLD CONTINENTAL AIR
MASS WITH THE CANADIAN FRONT THAT PUSHES IN TODAY. AREAS SNOW
OBSERVED IN CASCADE CREST CAMERAS THIS MORNING...ASSOCIATED WITH
LEADING EDGE OF FRONT. BEST CHANCE FOR RAIN SHOWERS WEST OF CASCADES
TODAY AS THE FRONT PUSHES INTO THE LINGERING LOW LEVEL MOISTURE OVER
THE REGION...THEN THE OFFSHORE FLOW WILL DRY THINGS OUT...EXCEPT FOR
A LINGERING CHANCE OF SNOW SHOWERS NEAR THE CASCADE CREST IN EASTERLY
UPSLOPE ASSOCIATED WITH THE UPPER TROUGH INTO WED.

A STRONG PRES GRADIENT IMMEDIATELY BEHIND THE FRONT WILL BRING UP
WINDS WITH FRONTAL PASSAGE...AND THE NORTHEAST-SOUTHWEST PRES
GRADIENT THAT REMAINS OVER THE AREA WILL TEND TO KEEP BREEZES UP
THROUGH THE SHORT TERM. VERY COLD 850 MB TEMPS WED AND THU MORNINGS
INDICATE THE POTENTIAL FOR COLD OVERNIGHT LOWS IN THE FEW WIND
SHELTERED AREAS. THE 06Z AVN SHOWED THE STRONGEST WINDS THROUGH THE
GORGE HOLDING OFF TILL THU WHEN THE SURFACE HIGH DROPS FAR ENOUGH
SOUTH TO MAXIMIZE THE EAST-WEST PRES GRADIENT.

.LONG TERM...RUN TO RUN AND MODEL TO MODEL INCONSISTENCIES CONTINUE
THROUGH PERIOD AND WILL MAKE NO CHANGES AT THIS TIME. WILLIS

AST 31100  PDX 31100  SLE 31100  EUG 31100

.PQR...SMALL CRAFT ADVISORY CAPE SHOALWATER TO FLORENCE FOR HAZARDOUS
       SEAS.