Flash Flood Warning 77, NWS Honolulu, HI

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE HONOLULU HI
500 PM HST THU MAR 16 2006

REMOVED EXTRANEOUS WORDING AT END OF FIRST DISCUSSION PARAGRAPH

.SYNOPSIS...A TROUGH BOTH AT THE SURFACE AND ALOFT CONTINUES TO
MAINTAIN A MOIST AND UNSTABLE AIRMASS OVER THE MAIN HAWAIIAN
ISLANDS. THE FOCUS OF HEAVY SHOWERS AND THUNDERSTORMS WILL REMAIN
OVER KAUAI TONIGHT. OVERALL SHOWER ACTIVITY WILL DECREASE TOMORROW
AND SATURDAY...BUT LOCALLY HEAVY SHOWERS AND THEREFORE THE THREAT OF
FLASH FLOODING WILL PERSIST THROUGH THE WEEKEND AND INTO NEXT WEEK.
&&

.DISCUSSION...LOW LEVEL CONVERGENCE...AMPLE MOISTURE AND STRONG
UPPER LEVEL SUPPORT CONTINUES TO PRODUCE A RELATIVELY FOCUSED AREA
OF HEAVY SHOWERS AND THUNDERSTORMS OVER AND AROUND THE ISLAND OF
KAUAI. AT LOW LEVELS...A SURFACE TROUGH TO THE WEST IS CAUSING A
SHARP TURNING OF THE WINDS ACROSS THE STATE. RADAR WIND PROFILES
OVER INDICATE LOW LEVEL FLOW OUT OF THE EAST NORTHEAST OVER THE BIG
ISLANDS AND OUT OF THE SOUTH OVER KAUAI. WHILE THE DEPTH OF
EASTERLIES OVER THE BIG ISLAND REMAINS NEAR 5 THOUSAND FEET...
RADAR PROFILES OVER KAUAI SHOWED SOUTHERLY WINDS HAVE DECREASED IN
DEPTH FROM 12 TO 10 THOUSAND FEET. WHILE THE SURFACE TROUGH REMAINS
WEST OF KAUAI...RADAR AND AIRCRAFT DATA OVER KAUAI SHOW THAT HIGH
LEVEL WINDS HAVE TURNED TO THE WEST NORTHWEST THIS AFTERNOON...A
SIGN THAT THE AXIS OF THE SHORTWAVE HAS MOVED EAST OF KAUAI. THIS
WILL DECREASE THE AMOUNT OF UPPER SUPPORT THAT WAS DRIVING THE HEAVY
SHOWERS AND THUNDERSTORMS OVER THE GARDEN ISLE TODAY. WILL KEEP LOTS
OF SHOWERS IN THE FORECAST FOR GARDEN ISLE TONIGHT...BUT LIMIT THE
THUNDERSTORMS TO THE EVENING HOURS. HAVE OTHERWISE REMOVED
THUNDERSTORMS FROM THE FORECAST TONIGHT...AND DECREASED THE AMOUNT
OF SHOWERS FOR EVERYWHERE ELSE EXCEPT FOR WINDWARD BIG ISLAND. UPPER
LEVEL SUPPORT FOR HEAVY SHOWERS DECREASES SLIGHTLY TOMORROW...THOUGH
NOT COMFORTABLY ENOUGH TO REMOVE THE LOCALLY HEAVY SHOWERS WORDING.
HAVE MARKEDLY REDUCED THE  OVERALL AMOUNT OF CLOUDS AND SHOWERS
ACROSS THE BOARD FRIDAY MORNING. THE MORNING SUNSHINE WILL LEAD TO
AFTERNOON CONVECTION...SO HAVE MAINTAINED HIGHER POPS AND ISOLATED
THUNDERSTORMS FOR THE AFTERNOON HOURS. SNOW SHOWERS TAPERED OFF THIS
AFTERNOON ON THE BIG ISLAND SUMMITS...BUT A SHORTWAVE PASSING
TONIGHT WILL BRING ANOTHER ROUND OF SNOW SHOWERS TONIGHT AND
FRIDAY...SO THE WINTER STORM WARNING CONTINUES.

THE SURFACE TROUGH WILL LINGER OVER THE ISLANDS OVER THE
WEEKEND...AND ANOTHER UPPER TROUGH WILL MOVE INTO THE AREA. THE TWO
FEATURES IN CONCERT WILL MAINTAIN THE POSSIBILITY OF HEAVY
SHOWERS...THUS HAVE EXTENDED THE FLASH FLOOD WATCH INTO SATURDAY.
THE UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH AT LEAST THE
FIRST HALF OF NEXT WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
 FLASH FLOOD WATCH...ALL ISLANDS THRU SATURDAY.
 WINTER STORM WARNING...BIG ISLAND SUMMITS THRU FRIDAY.

&&

TANABE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
247 PM HST THU MAR 16 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0241 PM     HEAVY RAIN       KAHUKU                  21.68N 157.95W
03/16/2006  U0.00 INCH       HONOLULU           HI   TRAINED SPOTTER

            SPOTTER ESTIMATES HEAVY RAINFALL AT THE RATE OF 1-2
            INCHES PER HOUR. RESULTING IN PONDING OF WATER ON ROADS
            BY KAHUKU HIGH SCHOOL

&&

NASH