FNUS76 KSEW 020211
FWSSEW

SPOT FORECAST FOR GRAND PARK...NPS MT RAINER
NATIONAL WEATHER SERVICE SEATTLE WA
711 PM PDT SAT AUG 1 2009

FORECAST IS BASED ON REQUEST TIME OF 1855 PDT ON AUGUST 01.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL HIGH PRESSURE RIDGE WILL REMAIN IN
PLACE ON SUNDAY...GIVING LITTLE CHANGE OF WEATHER OVER THE GRAND
PARK FIRE COMPARED TO WHAT HAPPENED SATURDAY. THIS WILL MEAN
WINDS WHICH ARE ALMOST ENTIRELY CONTROLLED BY DIURNAL TERRAIN
INFLUENCES AS WELL AS SLOPE AND ASPECT WITH STRONGEST WINDS
OCCURRING EACH AFTERNOON DURING THE HEAT OF THE DAY. TEMPERATURES
WILL CONTINUE TO HOLD ABOUT 5-10 DEGREES ABOVE SEASONAL NORMS WITH
CORRESPONDINGLY LOW HUMIDITY. ON MONDAY...DRIER AIR ALOFT WILL
MEAN A HIGHER VALUE FOR THE HAINES INDEX...BUT SURFACE TEMPERATURE
AND HUMIDITY SHOULD BE SLIGHTLY COOLER AND A LITTLE MORE HUMID.

ON TUESDAY...AN UPPER LOW OFF THE CALIFORNIA COAST WILL START TO
MOVE NORTHEAST. THIS WILL CAUSE AN INCREASING RISK OF LIGHTNING
STARTING ON WEDNESDAY AND CONTINUING THURSDAY.

 FORECAST FOR 20 FOOT WIND SPEED (VALLEYS AND RIDGE TOPS) ARE 10
 MINUTE AVERAGES REFLECTING RAWS WINDS.

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR (>0.25")........0%.
MIN TEMPERATURE.....AROUND 63.
MAX HUMIDITY........60 PERCENT.
EYE LEVEL WINDS.....WEST-NORTHWEST WINDS 2 TO 4 MPH.
WIND (20 FT)........WEST-NORTHWEST WINDS 6 TO 10 MPH.
MIXING HEIGHT.......3500 FT AGL DECREASING TO 1200 FT.
TRANSPORT WINDS.....NORTHWEST AROUND 12 MPH.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

.SUNDAY...

SKY/WEATHER.........SUNNY.
CWR.................0%.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........33 PERCENT.
EYE LEVEL WINDS.....NORTHWEST WINDS 3 TO 5 MPH.
WIND (20 FT)........NORTHWEST WINDS 5 TO 12 MPH.
MIXING HEIGHT.......RISING TO 4000 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 8 MPH.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

.SUNDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0%.
MIN TEMPERATURE.....AROUND 61.
MAX HUMIDITY........70 PERCENT.
EYE LEVEL WINDS.....NORTHWEST WINDS 1 TO 3 MPH.
WIND (20 FT)Y.......NORTHWEST WINDS 6 TO 8 MPH.
MIXING HEIGHT.......3000 FT AGL DECREASING TO 800 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....NORTHWEST AROUND 11 MPH.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0%.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........34 PERCENT.
EYE LEVEL WINDS.....WEST TO NORTHWEST WINDS 2 TO 4 MPH.
WIND (20 FT)........WEST WINDS AROUND 8 MPH.
MIXING HEIGHT.......RISING TO 3000 FT AGL.
TRANSPORT WINDS.....WEST AROUND 8 MPH.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...GAVIN WILSON
TYPE OF REQUEST...WILDFIRE
.TAG 20090801.GRAND.02/SEW