FNUS70 PHFO 211506
FWSHFO

SPOT FORECAST FOR PRESIDENTS DAY
NATIONAL WEATHER SERVICE HONOLULU HI
506 AM HST TUE APR 21 2009

IF CONDITIONS BECOME UNREPRESENTATIVE...PLEASE CONTACT
THE NATIONAL WEATHER SERVICE.

.DISCUSSION...ALTHOUGH LIGHT NORTH TO NORTHEAST LOW-LEVEL WINDS
WILL SPREAD TO WINDWARD BIG ISLAND TODAY...THE VOLCANO AREA WILL
STILL HAVE LIGHT AND VARIABLE WINDS...WHICH WILL ALLOW EMISSIONS
TO POOL IN THE AREA...AND MOVE ALONG VARYING TRAJECTORIES.
ALTHOUGH TRADE WINDS WILL GRADUALLY RETURN ON WEDNESDAY...WINDS
WILL CONTINUE TO BE LIGHT...AND TRADES MAY BREAK DOWN AGAIN BY
WEEK/S END.


.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY. HAZE. ISOLATED SHOWERS.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........65 PERCENT.
20-FOOT WINDS.......NORTH AROUND 6 MPH UNTIL 10 AM...THEN SOUTHEAST
                    AROUND 8 MPH.
MIXING HEIGHT.......3500 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 5 MPH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED SHOWERS.
MIN TEMPERATURE.....AROUND 51.
MAX HUMIDITY........100 PERCENT.
20-FOOT WINDS.......VARIABLE WIND LESS THAN 6 MPH.
MIXING HEIGHT.......3500 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE
                    SOUTHEAST AFTER MIDNIGHT.

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY. ISOLATED SHOWERS.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........65 PERCENT.
20-FOOT WINDS.......VARIABLE WIND LESS THAN 6 MPH UNTIL 10
                    AM...THEN SOUTHEAST AROUND 5 MPH.
MIXING HEIGHT.......3500 FT AGL.
TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.


FORECASTER...BIRCHARD

$$

REQUESTED BY...NPS
REASON FOR REQUEST...VOLCANIC EMISSIONS