FNUS70 PHFO 011641
FWSHFO

SPOT FORECAST FOR PRESIDENTS DAY
NATIONAL WEATHER SERVICE HONOLULU HI
641 AM HST FRI MAY 1 2009

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

.DISCUSSION...THE SURFACE RIDGE HAS MOVED TO JUST NORTH OF THE
ISLANDS. WINDS NEAR THE SURFACE WILL BE WEAK ENOUGH TO ALLOW
POOLING OF EMISSIONS. TRANSPORT WINDS ARE LIGHT EASTERLY BUT
EMISSIONS WILL MOVE IN VARIABLE DIRECTIONS...WITH THE DIURNAL
EFFECTS OF LIGHT SOUTHEAST TO WEST WIND FOR MIDDAY AND
AFTERNOON...AND THEN DOWNSLOPE OVERNIGHT AND EARLY IN THE MORNING.


.TODAY...
SKY/WEATHER.........SUNNY UNTIL NOON...THEN PARTLY SUNNY. HAZE.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........70 PERCENT.
20-FOOT WINDS.......VARIABLE WIND LESS THAN 6 MPH UNTIL
12 PM...THEN EAST TO SOUTHEAST AROUND 6 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....EAST AROUND 10 MPH.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY. HAZE. ISOLATED SHOWERS.
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........100 PERCENT.
20-FOOT WINDS.......EAST AROUND 6 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....EAST AROUND 5 MPH.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY UNTIL NOON...THEN MOSTLY CLOUDY.
                    HAZE. ISOLATED SHOWERS.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........65 PERCENT.
20-FOOT WINDS.......NORTHEAST AROUND 6 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....EAST AROUND 10 MPH.


$$

FORECASTER...HOAG

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