Flash Flood Warning 101, NWS Honolulu, HI

000
WGHW70 PHFO 261744
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
736 AM HST SUN MAR 26 2006

HIC003-261930-
ISLAND OF OAHU IN HONOLULU COUNTY-
736 AM HST SUN MAR 26 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 930 AM HST...

AT 735 AM HST...RADAR SHOWED AN AREA OF HEAVY RAIN FROM HAWAII 
KAI...NORTH TO KAILUA. THE AREA OF HEAVY RAIN WAS NEARLY STATIONARY.
IN ADDITION...A BAND OF STRONG THUNDERSTORMS WITH TORRENTIAL RAIN 
WAS ABOUT 15 MILES WEST OF THE WAIANAE COAST...AND WAS MOVING EAST 
AT AROUND 10 MPH. THIS BAND WILL LIKELY MOVE ONSHORE BY AROUND 900 
AM..AND THEN MOVE SLOWLY EASTWARD OVER AREAS THAT RECEIVED VERY 
HEAVY RAIN EARLIER THIS MORNING. BECAUSE THE GROUND IS SATURATED... 
ANY ADDITIONAL RAIN WILL QUICKLY BECOME RUNOFF AND CAUSE FLASH 
FLOODING.

MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO
CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR
WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS. TURN AROUND...DON/T
DROWN.

ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY
TO OUTRACE A FLOOD...EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP
NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE
LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE OR
CIVIL DEFENSE OFFICIALS FOR RELAY TO THE NATIONAL WEATHER SERVICE.

THE FLASH FLOOD WARNING MAY NEED TO BE EXTENDED BEYOND 930 AM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2122 15831 2120 15753 2185 15781 2160 15830

$$

BROWNING

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST SUN MAR 26 2006

.SYNOPSIS...
UNSTABLE WET WEATHER WILL CONTINUE ACROSS THE MAIN HAWAIIAN ISLANDS
TODAY AND THROUGH MOST OF THE NEXT WEEK AS A TROUGH OF LOW PRESSURE
PERSISTS TO OUR WEST. PARTICULARLY HEAVY RAINFALL MAY OCCUR TODAY
THROUGH MONDAY THEN WEDNESDAY THROUGH THURSDAY.

&&

.DISCUSSION...
A DEEP SOUTHWEST TO NORTHEAST ORIENTED TROUGH WEST OF THE MAIN
HAWAIIAN ISLANDS WILL KEEP THE POTENTIAL HIGH FOR HEAVY RAINFALL AT
TIMES THROUGH THE FORECAST PERIOD. SHORT WAVE IMPULSES ROTATE
THROUGH THE BASE OF THE LARGER TROUGH AND MOVE OVER THE
STATE...DRAGGING DEEP TROPICAL MOISTURE INTO THE PERPETUALLY
UNSTABLE ATMOSPHERE OVER THE ISLANDS AND TRIGGERING THE HEAVY
RAINFALL BURSTS.

MODELS SHOW THE NEXT IMPULSE AFFECTING THE ISLANDS TODAY THROUGH
MONDAY...WITH A SECOND IMPULSE EXPECTED WEDNESDAY THROUGH THURSDAY.
SATELLITE AND RADAR SHOW SHOWERS WITH THIS NEXT IMPULSE ARE ALREADY
DEVELOPING OVER THE KAUAI CHANNEL AND ACROSS SOUTHEAST PORTIONS OF
KAUAI. THIS ACTIVITY WILL LIKELY INTENSIFY THROUGH THE DAY TODAY AND
SPREAD EASTWARD. LOW LEVEL FLOW WILL REMAIN SOUTHERLY THROUGH
MIDWEEK...SO HAWAII WEATHER WILL BE WETTER THAN NORMAL EVEN BETWEEN
IMPULSES. THE PALL OF BROKEN TO OVERCAST MIDDLE AND HIGH CLOUDS LIE
ALONG THE EASTERN FLANK OF THE TROUGH AND WILL LIKELY BLOCK THE SUN
INTO EARLY NEXT WEEK.

AFTER THURSDAY...NOGAPS AND GFS WANT TO PUSH THE TROUGH TO THE EAST
OF THE ISLANDS. THIS WOULD BRING DRIER WEATHER TO THE STATE BY NEXT
WEEKEND. TRADE WINDS SHOULD GRADUALLY RETURN BY NEXT WEEKEND...BUT
RAINFALL WILL STILL LIKELY BE A BIT HEAVIER THAN NORMAL AS ALL THE
MOISTURE BROUGHT UP BY THE SOUTHERLIES FROM EARLIER IN THE WEEK GETS
CARRIED BACK WESTWARD OVER THE ISLANDS.

&&

.MARINE...
NEAR HIGH SURF CONDITIONS OF 8 FEET ON THE EAST FACING SHORES
EXPOSED TO THE NORTH SWELL WILL DECREASE SLOWLY THROUGH THE DAY
TODAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH SUNDAY AFTERNOON THROUGH LATE MONDAY NIGHT FOR
MAUNA KEA AN MAUNA LOA.
FLASH FLOOD WATCH THROUGH LATE MONDAY NIGHT FOR ALL ISLANDS.

POWELL