FXAK69 PAFG 292330
AFDAFG

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
230 PM AKST SUN NOV 29 2009

.DISCUSSION...

UPPER AIR: STRONG RIDGE BUILDS FROM SOUTHEAST ALASKA TO THE
EASTERN INTERIOR ON MON AS LOW PRESSURE MOVES EAST TO THE EASTERN
ALEUTIANS. LONG WAVE TROUGH RE-EMERGES AT MID WEEK AS RIDGE MOVES 
EAST. 

SURFACE: A 1000 MB LOW 450 NM NORTH OF BARROW SUN EVENING WILL
MOVE NORTH AND DISSIPATE SUN NIGHT. A STRONG RIDGE OF HIGH
PRESSURE WILL PERSIST ACROSS CENTRAL SIBERIA THROUGH TUE. A
SURFACE TROUGH WILL DEVELOP FROM KOTZEBUE SOUND TO THE ARCTIC
COASTAL PLANE ON MON THEN PERSIST THROUGH TUE. A 957 MB LOW 600 NM
WEST OF COLD BAY SUN EVENING WILL MOVE EAST. AT 3 PM AKST MON
AFTERNOON...THE LOW WILL BE 961 MB 300 NM WEST OF COLD BAY. AT 6 AM
AKST TUE MORNING...THE LOW WILL BE 967 MB NEAR COLD BAY. AT 6 AM
AKST WED MORNING...THE LOW WILL BE 983 MB OVER BRISTOL BAY.

NORTH SLOPE: TROUGH MOVES NORTH TO THE NORTH SLOPE ON MON TO
PRODUCE SCATTERED SNOW SHOWERS FROM BARROW WEST. ANOTHER STRONGER
TROUGH FOLLOWS TUE AFTERNOON/NIGHT.

WEST COAST: NORTHEAST WINDS INCREASE FROM SOUTH TO NORTH OVER THE
WEST COAST TONIGHT THROUGH MON AS LOW MOVES EAST OVER THE CENTRAL
ALEUTIANS AND ASSOCIATED FRONT MOVES NORTH OVER THE WEST COAST.
THIS HAS PROMPTED WINTER WEATHER ADVISORIES FOR SNOW AND BLOWING
SNOW FOR ZONES 212 THROUGH 215. EXTENSIONS TO ZONES FURTHER NORTH
WILL BE LOOKED INTO LATER. SNOW ACCUMULATIONS OF 2 TO 3 INCHES MAY
OCCUR ALONG WITH THE POOR VISIBILITIES IN BLOWING SNOW. ALASKA
RANGE SECTION OF ZONE 227 WILL HAVE ADVISORY WINDS MON TO MON
EVENING.

INTERIOR: STRONG UPCOMING CHINOOK HAS PROMPTED THE THE ISSUANCE OF
HIGH WIND WATCHES FOR THE ALASKA RANGE WEST OF THE TOK CUTOFF
BEGINNING MON. ZONE 225 HAS THE WATCH FROM MON MORNING THROUGH MON
NIGHT. ZONE 226 HAS A WATCH FROM MON AFTERNOON THROUGH TUE AS THE
RIDGE AXIS SLOWLY SHIFTS FURTHER EAST INTO CANADA.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WATCH FOR AKZ225-AKZ226.

WIND ADVISORY FOR AKZ227.

WINTER WEATHER ADVISORY FOR AKZ212-AKZ213-AKZ214-AKZ215.

HEAVY FREEZING SPRAY WARNING FOR PKZ210.

SMALL CRAFT ADVISORY FOR PKZ210.

GALE WARNING FOR PKZ210.

BRISK WIND ADVISORY FOR PKZ200-PKZ220.
&&

$$

DA NOV 09