Frost Advisory 3, NWS Eureka, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
345 AM PST TUE NOV 28 2006

.SYNOPSIS...UPPER LEVEL LOW OVER THE PACIFIC NORTHWEST CONTINUES TO
BRING COLD AND UNSTABLE AIR OVER NORTHERN CALIFORNIA. SCATTERED
SHOWERS ASSOCIATED WITH THIS UPPER LEVEL LOW WILL CONTINUE THROUGH
THIS AFTERNOON. AN UPPER LEVEL RIDGE BUILDS OVER THE AREA AS THE
UPPER LEVEL LOW MOVES EASTWARD TONIGHT. THE RIDGE WILL HOLD
WEDNESDAY AND WEAKEN THURSDAY AS A WEAK FRONT APPROACHES THE AREA.
HIGH PRESSURE WILL REBUILD OVER THE NORTHEAST PACIFIC FRIDAY.

&&

.DISCUSSION...MADE VERY LITTLE CHANGE TO THE PREVIOUS SHORT TERM
FORECAST AS THE MOVEMENT OF THE UPPER LEVEL LOW SEEMS ON TRACK. THE
UPPER LEVEL LOW IS CURRENTLY OVER NORTHERN IDAHO WITH A 115 TO 130
KT JET OVER THE WASHINGTON AND OREGON COASTLINE. THIS FEATURE WILL
CONTINUE TO BRING COLD AND UNSTABLE AIR OVER THE FORECAST AREA
TODAY. THE SHOWERS ASSOCIATED WITH THIS UPPER LEVEL LOW WILL LESSEN
IN THE EVENING AS IT MOVES FURTHER EAST.

A HIGH PRESSURE RIDGE WILL BUILD OVER NORTHWEST CALIFORNIA THIS
EVENING AS THE UPPER LEVEL LOW PUSHES EASTWARD. HAVE KEPT THE AREAS
OF FROST IN ZONES ONE AND TWO FOR TONIGHT BUT DID NOT ISSUE A FROST
ADVISORY. THE GROWING SEASON CUT OFF DATE IS JUST TWO DAYS AWAY...ON
NOVEMBER THIRTIETH...AND DO NOT CURRENTLY THINK THE TEMPERATURES
WARRANT AN ADVISORY. THE RIDGE WILL HOLD THROUGH WEDNESDAY.

MODEL SOLUTIONS ARE IN AGREEMENT WITH BRINGING A WEAK FRONT OVER
WASHINGTON AND OREGON THURSDAY. EXPECT THIS FRONT TO JUST CLIP THE
NORTHERN PORTION OF THE CWA AND BRING LIGHT PRECIPITATION TO
NORTHERN DEL NORTE COUNTY THURSDAY AFTERNOON. THE UPPER LEVEL RIDGE
WILL REBUILD ON FRIDAY AND OFFSHORE WINDS WILL DEVELOP BRINGING
WARMER TEMPERATURES AND DRIER WEATHER OVER THE WEEKEND. TH

&&

.AVIATION...SEE TAFS FOR THE LATEST UPDATES AND OBSERVATIONS.

&&

.EKA...WATCHES/WARNINGS/ADVISORIES...
HAZARDOUS SEAS WARNING IN EFFECT FROM PT ST GEORGE TO PT ARENA OUT
TO 60NM.
SMALL CRAFT ADVISORY FOR WINDS IN EFFECT FROM PT ST GEORGE TO PT
ARENA 20 TO 60NM.

&&

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