FNUS76 KSEW 051544
FWSSEW

SPOT FORECAST FOR CAPITOL PEAK FIRE...MUNICIPAL AGENCY
NATIONAL WEATHER SERVICE SEATTLE WA
844 AM PDT SUN MAY 5 2013

FORECAST IS BASED ON REQUEST TIME OF 0818 PDT ON MAY 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE OVER THE AREA WILL KEEP THE AIR
MASS DRY AND CLOUD FREE THROUGH MONDAY. A SURFACE THERMALLY
INDUCED TROUGH ALONG THE OREGON AND WASHINGTON COAST WILL BE THE
KEY FEATURE FOR THE WINDS. THIS IS CAUSING NORTHERLY SURFACE WINDS
AT LOWER ELEVATIONS CLOSE TO SEA LEVEL. ABOVE 1500 TO 2000 FEET
AND AT THE LEVEL OF THE FIRE...THE WINDS BECOME E-NE. FREE AIR WINDS AT
THIS LEVEL THIS MORNING WILL BE E TO NE 15-25 KNOTS WITH GUSTS TO
30 KNOTS. THE TREND FOR THIS AFTERNOON IS FOR THE FREE AIR WINDS
TO BECOME MORE NORTHEASTERLY AND WEAKEN SLIGHTLY TO 15 TO 20 KNOTS
WITH GUSTS TO 30 KNOTS STILL POSSIBLE.

NORTH TO NORTH EAST PRESSURE GRADIENTS WILL CONTINUE THROUGH
TONIGHT. THE HOQUIAM TO SEATTLE GRADIENT WAS -2.1 MB AT 8 AM AND
IT IS EXPECTED TO WEAKEN THIS AFTERNOON. IT WILL STRENGTHEN AGAIN
TONIGHT BUT WILL NOT BE AS STRONG AS THIS MORNING. IT WILL BECOME
FLAT MONDAY MORNING WITH LIGHT WINDS AS THE THERMAL TROUGH MOVES
INLAND. THE PRESSURE GRADIENT WILL BECOME ONSHORE FROM THE WSW
MONDAY AFTERNOON AS THE THERMAL TROUGH MOVES OVER EASTERN WA AND A
MARINE PUSH DEVELOPS.

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

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 6 TO 20 MPH. GUSTS UP TO 30 MPH
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 18 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........50 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 6 TO 12 MPH.

TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH.

.MONDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........24 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 3 TO 6 MPH SHIFTING TO THE
                    NORTHWEST 3 TO 5 MPH IN THE AFTERNOON.

TRANSPORT WINDS.....LIGHT WINDS.

$$
FORECASTER...KAM
REQUESTED BY...ROBERT SCOTT
TYPE OF REQUEST...WILDFIRE
.TAG 20130505.CAPIT.01/SEW