Flash Flood Warning 30, NWS Honolulu, HI

000
WGHW70 PHFO 012223
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1225 PM HST SAT OCT 1 2005

HIC009-012240-
MAUI-
1225 PM HST SAT OCT 1 2005

...THE FLASH FLOOD WARNING FOR THE ISLAND OF MAUI IN MAUI COUNTY IS 
CANCELLED...

...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE ENTIRE STATE 
THROUGH SUNDAY...

AT 1215 PM...RADAR INDICATED THAT HEAVY RAINFALL OVER THE EASTERN 
END OF MAUI HAS DIMINISHED. ALTHOUGH STREAM GAGES IN THE AFFECTED 
AREA INDICATE THAT LEVELS ARE BELOW FLOOD STAGES...STREAMS WILL 
REMAIN SLIGHTLY ELEVATED OVER THE NEXT TWO HOURS AS RUNOFF FROM THE 
EARLIER RAINFALL CONTINUES. WHILE THE HEAVY RAINFALL HAS SUBSIDED 
FOR NOW...ADDITIONAL HEAVY RAINS ARE POSSIBLE LATER.

LAT...LON 2060 15619 2066 15600 2078 15597 2088 15617
      2073 15616

$$

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST SAT OCT 1 2005

.SYNOPSIS...
TROPICAL MOISTURE AND A LOW ALOFT WILL PRODUCE VERY WET WEATHER OVER
THE ISLANDS THROUGH SUNDAY. DRIER WEATHER WILL RETURN ON MONDAY AS
THE TROPICAL MOISTURE AND THE LOW ALOFT MOVE AWAY TO THE WEST.
TRADE-WIND WEATHER WILL CONTINUE THROUGH THE REST OF NEXT WEEK.

&&

.SHORT TERM...
A WEAK SURFACE TROUGH...ALL THAT REMAINS OF TROPICAL DEPRESSION
KENNETH...IS SOUTHWEST OF KAUAI AND MOVING WEST. THIS SYSTEM IS NO
LONGER HAVING MUCH INFLUENCE ON THE MAIN HAWAIIAN ISLANDS BUT IT HAS
LEFT INCREASED MOISTURE AROUND THE ISLANDS AND HAS HELPED WEAKEN THE
TRADE-WIND FLOW SINCE YESTERDAY. WITH ALL THE WEATHER AFFECTING
THE MAIN HAWAIIAN ISLANDS RECENTLY...TRADE WINDS HAVE CONTINUED. A
1026MB SURFACE HIGH 820 MILES NORTH OF KAUAI NEAR 34N 162W IS
MAINTAINING THE TRADES. OVER THE NEXT TWO DAYS...THE HIGH WILL SHIFT
EASTWARD...ENDING UP NEAR 140W ON MONDAY MORNING.

WATER VAPOR IMAGERY SHOWS A LOW ALOFT AT 26N 157W. A TROUGH EXTENDS
FROM THE LOW TO A POINT JUST NORTH OF KAUAI. THE TROUGH IS ROTATING
SOUTHEASTWARD AROUND THE SOUTH SIDE OF THE LOW. THE LOW IS FORECAST
TO MOVE TOWARDS THE WEST NORTHWEST OVER THE NEXT 24 HOURS...THEN
LIFT OUT TO THE NORTH.

THE LOW ALOFT WILL KEEP THE ATMOSPHERE UNSTABLE OVER THE MAIN
HAWAIIAN ISLANDS THROUGH SUNDAY WITH THE MOST INSTABILITY THIS
AFTERNOON AS THE TROUGH ROTATING AROUND THE SOUTH SIDE OF THE LOW
SWINGS OVER THE ISLANDS. SO FAR...WITH TRADE WINDS CONTINUING...MUCH
OF THE HEAVY RAINFALL HAS BEEN CONCENTRATED OVER WINDWARD SLOPES.
THE LOW ALOFT IS INDUCING LOW LEVEL TROUGHING OVER THE MAIN HAWAIIAN
ISLANDS AND THAT IS WEAKENING THE TRADES. THAT WILL INCREASE THE
POSSIBILITY OF HEAVY SHOWERS OVER LEEWARD AND INTERIOR SECTIONS THIS
AFTERNOON. TOMORROW WITH EVEN WEAKER TRADES...THE THREAT OF HEAVY
RAIN WILL BE GREATEST OVER INTERIOR AND LEEWARD AREAS IN THE
AFTERNOON.

&&

.LONG TERM...
STARTING MONDAY...SURFACE HIGH PRESSURE NORTHEAST OF THE ISLANDS
WILL BUILD SOUTHWESTWARD. THE PRESSURE GRADIENT OVER THE ISLANDS
WILL INCREASE. TRADE WINDS WILL STRENGTHEN AND BECOME LOCALLY
BREEZY BY THE MIDDLE OF NEXT WEEK. TRADE WIND WEATHER WILL CONTINUE
THROUGH NEXT WEEK.

&&

.MARINE...
DATA FROM THE KAILUA BAY BUOY SHOW THAT THE SIZE AND PERIOD OF THE
EAST SWELL HAVE BOTH DROPPED SINCE LAST NIGHT. WE WILL BE CANCELLING
THE HIGH SURF ADVISORY AT 1000 AM. A NEW SOUTH SWELL WILL BE
REACHING THE ISLANDS TUESDAY. THAT SWELL IS LIKELY TO PRODUCE SURF
ABOVE THE ADVISORY LEVEL OF 8 FEET THROUGH FRIDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FOR ALL ISLANDS THROUGH SUNDAY 6PM.

&&

DONALDSON