FNAK71 PAFC 202057
FWSAER

SPOT FORECAST FOR GRAZELKA PILE...AFS/BLM
NATIONAL WEATHER SERVICE ANCHORAGE AK
1157 AM AKST SAT FEB 20 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 AKST ON FEBRUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...UPPER LEVEL FEATURES WILL PASS WEST OF THE ANCHORAGE AREA
THROUGH SUNDAY. PRECIPITATION IS EXPECTED TO REMAIN WEST OF THE AREA...BUT
SKIES WILL REMAIN MOSTLY CLOUDY. AT THE SURFACE HIGH PRESSURE OVER THE
COPPER RIVER BASIN WILL BUILD WESTWARD TOWARD ANCHORAGE RESULTING IN A WEAK
PRESSURE GRADIENT AND LIGHT WINDS. THE COMBINATION OF LIGHT WINDS AND CLOUD
COVER MEANS THAT THE MIXING HEIGHT WILL REMAIN LOW THROUGH THE DAYTIME PERIOD
AND THE LOW LEVEL TEMPERATURE INVERSION WILL REMAIN INTACT.

.TONIGHT...

SKY/WEATHER.........CLOUDY.
MIN TEMPERATURE.....AROUND 27.
MAX HUMIDITY........AROUND 92%.
WIND (20 FT)........CALM.
CWR.................0.
MIXING HEIGHT.......1300 FEET...DROPPING TO 400 FEET TOWARD MORNING.
MIXING WINDS........EAST 5 MPH OR LESS.

.SUNDAY...

SKY/WEATHER.........CLOUDY.
MAX TEMPERATURE.....AROUND 36.
MIN HUMIDITY........AROUND 60%.
WIND (20 FT)........NORTHEAST 4 TO 7 MPH.
CWR.................0.
MIXING HEIGHT.......400 FEET EARLY MORNING...RISING TO 1200 FEET IN THE AFTERNOON.
MIXING WINDS........EAST 5 MPH MORNING INCREASING TO 10 MPH IN THE AFTERNOON.

$$
FORECASTER...BAINES
REQUESTED BY...JAMES R  SULLIVAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20100221.GRAZE.01/AER