High Surf in Hawaii, July 4, 2001

HAWAIIAN ISLANDS SYNOPTIC DISCUSSION AND GUIDANCE
NATIONAL WEATHER SERVICE HONOLULU HI
10 AM HST WED JUL 4 2001

SUMMARY...LIGHT AND VARIABLE WINDS CONTINUE OVER THE NORTHERN
ISLANDS WHILE SOME SEMBLANCE OF TRADES IS PUSHING IN NEAR THE BIG
ISLAND. SKIES ARE MOSTLY CLEAR TO PARTLY CLOUDY WITH SHOWERS
CONTINUING SPARSE.

DISCUSSION...A TROUGH AT UPPER LEVELS OVER THE EASTERN NORTH PACIFIC
HAS CUT OFF AND DROPPED A LOW PRESSURE CIRCULATION SOUTHWESTWARD AND
WESTWARD OVER THE REGION JUST NORTH OF HAWAII.  THIS UPPER LEVEL LOW
HAS A SURFACE REFLECTION CENTERED NEAR 30N 160W. AN AREA OF
THUNDERSTORMS SURROUND THIS LOW ON ITS EAST SIDE WITH A FRONTAL LIKE
STRING OF ISOLATED SHOWERS EXTENDING SW THRU 23N 160W 22N 165W TO
21N 170W WHERE ANOTHER DISTURBED AREA OR WAVE IS LOCATED. THIS
ACTIVITY WILL LIKELY REMAIN NORTH AND WEST OF THE ISLANDS DURING THE
NEXT DAY OR TWO. THE LOW PRESSURE AREA TO THE NORTH TOGETHER WITH
THE TROUGH BEFORE IT HAS DISRUPTED THE TRADES OVER THE NORTHWESTERN
ISLANDS WHILE AREAS NEAR THE BIG ISLAND AND MAUI IS FEELING SOME
EFFECTS OF THE APPROACHING TRADES PUSHING IN FROM THE EAST. EXTENSIVE
HIGH LEVEL CIRRUS CLOUDS CONTINUE TO SPREAD UP OVER BIG ISLAND AND
MAUI COUNTY FROM THE WSW. THESE CLOUDS WILL LET QUITE A BIT OF THE
SUNSHINE THROUGH THOUGH THEY WILL GIVE THE SKY THAT MILKY LOOK. AS A
SIDELIGHT...EXCUSE THE PUN...THIS DIFFUSE LIGHT COMING FROM THE
ENTIRE HEMISPHERIC DOME OF THE SKY ON SUCH CLOUDY DAYS SUPPLY LIGHT
TO VEGETATION AND LEAVES IN NORMALLY SHADY SPOTS AND THUS ARE
IMPORTANT TO MANY PLANTS STUCK IN THE SHADE OUT OF THE DIRECT BEAMS
FROM THE SUN. THE RETURN OF THE TRADES FOR KAUAI AND OAHU IS STILL
SCHEDULED FOR FRIDAY WHILE BIG ISLAND AND MAUI WILL HAVE SOME TRADE
WIND FLOW ALREADY TODAY BUT INCREASING STEADILY TOWARD THE WEEKEND.
NO ORGANIZED RAIN MAKERS ARE SEEN IN THE SATELLITE PICTURES AROUND
THE ISLANDS.   ROSENDAL

.PHFO......WARNINGS.....NONE
.          WATCHES......NONE
.          ADVISORIES...NONE