Brisk Wind Advisory 97, NWS Fairbanks, AK

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
528 AM ADT SAT APR 21 2007

.DISCUSSION...
TYPICAL SPRING WEATHER PATTERN WITH WEAK FLOW PATTERN AND
DRY STABLE AIRMASS OVER THE INTERIOR.

ISOLATED SHOWERS MAY BEGIN DEVELOPING IN THE EXTREME SOUTHEAST
INTERIOR MONDAY AFTERNOON AS SOME MOISTURE MOVES NORTHWESTWARD
OUT OF CANADA...AND LIFTED INDEXES DROP TO BELOW +4. THIS
INSTABILITY AND ISOLATED SHOWER ACTIVITY MAY SPREAD AS FAR
NORTHWEST AS ZONES AKZ220-AKZ222-AKZ225 BY TUESDAY AFTERNOON.
FLOW ALOFT OVER THE INTERIOR MONDAY AND TUESDAY WILL BE WEAKLY
CYCLONIC.

12Z SURFACE MAP SHOWING WEAK TROUGH OVER THE INTERIOR
EXTENDING FROM ANVIK TO TANANA TO NORTH OF EAGLE...AND WEAK
RIDGING SOUTH OF THE ALASKA RANGE. LOCALLY GUSTY SOUTH WINDS
CONTINUED IN PASSES IN AKZ226 WEST OF THE TOK CUTOFF...AND
GUSTINESS MAY INCREASE SOME DURING THE DAY WITH SOLAR HEATING.
GUSTS TO 25 MPH MAY ARE EXPECTED IN PASSES IN AKZ225.

WINDS GRADUALLY INCREASING OVER THE WEST COAST AND ARCTIC
COAST AS HIGH PRESSURE BUILDS OVER THE BEAUFORT SEA AND
A STRONG LOW SOUTH OF THE CENTRAL ALEUTIANS TRACKS EASTWARD
TOWARDS THE GULF OF ALASKA.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE

&&

.FIRE WEATHER...
EXTREMELY DRY CONDITIONS IN THE INTERIOR ARE EXPECTED AGAIN
TODAY...WITH MINIMUM RH BELOW 15% IN PORTIONS OF ZONES AKZ220-AKZ222-
AKZ223-AKZ224-AKZ225-AKZ226. A FEW SITES IN AKZ221 MAY ALSO GO
BELOW 15%. IN ZONES AKZ223-AKZ226...MIN RH BELOW 10% EXPECTED AT SOME
SITES. RED FLAG WILL LIKELY BE NEEDED FOR AKZ223 TODAY...AND POSSIBLY
OTHER ZONES IF FUELS ARE DETERMINED TO BE BURNABLE.

&&

.HYDROLOGY...
FLOOD WATCH ONGOING FOR THE TANANA RIVER NEAR SALCHA IN AKZ223. NO
NEW INFORMATION RECEIVED OVERNIGHT.

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
FLOOD WATCH FOR AKZ223.

HEAVY FREEZING SPRAY WARNING FOR PKZ200-PKZ210.
&&

RF APR 07