FNUS70 PHFO 291628
FWSHFO

SPOT FORECAST FOR PRESIDENTS DAY...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE HONOLULU HI
628 AM HST TUE DEC 29 2009

FORECAST IS BASED ON IGNITION TIME OF 0635 HST ON DECEMBER 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A SURFACE RIDGE IN THE VICINITY OF THE ISLANDS WILL MAINTAIN
SOUTHEASTERLY ONSHORE FLOW ALONG THE SOUTHEAST BIG ISLAND TODAY.
AN INCOMING COLD FRONT WILL WEAKEN THE ERODE THE RIDGE
GIVING WAY TO GENERALLY LIGHT WINDS AND LAND BREEZES TONIGHT.
RADIATIONAL COOLING WILL ALLOW A NOCTURNAL INVERSION TO DEVELOP
NEAR THE SURFACE LIKELY TRAPPING HIGHER CONCENTRATIONS OF VOG IN
SOME AREAS AFTER MIDNIGHT. DAYTIME MIXING SHOULD IMPROVE THESE
CONDITIONS SHORTLY AFTER SUNRISE INTO MID MORNING. THE COLD FRONT
WILL STALL OVER THE NORTHWEST PORTION OF THE STATE ALLOWING FOR
SEA BREEZES TO DEVELOP WEDNESDAY. SHOWER ACTIVITY WILL REMAIN
MOSTLY ISOLATED AND LIGHT THROUGH THE FORECAST PERIOD.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY. HAZE. ISOLATED SHOWERS.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........68 PERCENT.
MIXING HEIGHT.......3600-3700 FT AGL.
20-FOOT WINDS.......SOUTHEAST WINDS AROUND 6 MPH.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
                    HAZE.
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........100 PERCENT.
MIXING HEIGHT.......3600-3700 FT AGL.
20-FOOT WINDS.......WEST WINDS 5 TO 6 MPH IN THE EVENING BECOMING
                    LIGHT.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY. HAZE. CHANCE OF SHOWERS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 67.
MIN HUMIDITY........73 PERCENT.
MIXING HEIGHT.......3600-3700 FT AGL.
20-FOOT WINDS.......SOUTHEAST WINDS 5 TO 6 MPH.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH.

$$
FORECASTER...DEJESUS
REQUESTED BY...HEIDI
TYPE OF REQUEST...PRESCRIBED
.TAG 20091229.PRESI.01/HFO