Flash Flood Warning 32, NWS Honolulu, HI

495 
WGHW50 PHFO 270846
FFWHFO
HIZ024-025-027-028-271200-
/O.EXT.PHFO.FF.W.0032.000000T0000Z-081227T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
ISSUED BY NATIONAL WEATHER SERVICE SAN FRANCISCO CA
846 AM HST SAT DEC 27 2008

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS
EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF HAWAII IN HAWAII COUNTY...

* UNTIL 200 AM HST.

* AT 1030 PM HST...RADAR AND WEATHER SPOTTERS INDICATE RAIN RATES    
  OF 1-2 INCHES PER HOUR IN THE AFFECTED AREA.

* THERE HAVE BEEN REPORTS OF NEARLY 2 INCHES OF RAIN PER HOUR NORTH  
  OF HILO. 

* THERE HAVE BEEN REPORTS OF 1 INCH OF RAIN PER HOUR IN THE KAU      
  DISTRICT.

* OTHER LOCATIONS INCLUDE BUT ARE NOT LIMITED TO                     
  PEPEEKEO...PAPAIKOU...PAAUILO...OOKALA...LAUPAHOEHOE...KEAAU...    
  HONOMU...HONOKAA...KANA FLATS...HAWAIIAN PARADISE PARK AND         
  HAKALAU.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS 
IMMINENT IN STREAMS...ROADS...AND LOW LYING AREAS. MOVE TO HIGHER 
GROUND NOW. ALTHOUGH THE RAIN MAY SUBSIDE FROM TIME TO TIME...STAY 
ALERT FOR ADDITIONAL RAINFALL OR RUNOFF THAT MAY CAUSE FLOODING OR 
ROCK SLIDES.

DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT.
TURN AROUND...DON'T DROWN.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

LAT...LON 1887 15569 1921 15530 1918 15520 1947 15475
      1994 15507 2006 15521 2034 15597 1959 15526
      1892 15570

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 PM HST FRI DEC 26 2008

.SYNOPSIS...
AN UPPER LEVEL TROUGH OVER THE MAIN HAWAIIAN ISLAND IS BRINGING
UNSTABLE AIR TO THE AREA...SPREADING THE POSSIBILITY OF
THUNDERSTORMS WEST TOWARDS OAHU AND MAUI COUNTY. A SURFACE HIGH
NORTHEAST OF THE ISLANDS WILL KEEP MODERATE TRADE WINDS ACROSS THE
ISLANDS...AND THE UPPER LEVEL TROUGH WILL KEEP THE PATTERN MOIST
THROUGH THE WEEKEND.

&&

.DISCUSSION...
RAIN CONTINUES TO FALL OVER EAST AND SOUTHEAST PORTIONS OF THE BIG
ISLAND...AND SNOW CONTINUES TO FALL OVER THE SUMMITS OF MAUNA KEA
AND MAUNA LOA.

RAIN FALL TOTALS ON THE BIG ISLAND HAVE EXCEEDED 10 INCHES IN
SEVERAL LOCATIONS DURING THE 24 HOUR PERIOD ENDING AT 2 PM. WAIAKEA
UKA REPORTED 11.90 INCHES...PIIHONUA 10.15 AND LAUPAHOEHOE 10.04.
MOST OF THE RAIN HAS FALLEN OVER THE LAST 12 HOURS. DURING THE SAME
TIME...SNOW HAS FALLEN OVER MAUNA KEA AND MAUNA LOA. ABOUT A FOOT OF
SNOW HAS ALREADY FALLEN...AND ADDITIONAL SNOW IS EXPECTED TO FALL
OVERNIGHT.

DURING THE SAME 24 HOUR PERIOD...KAUPO GAP ON MAUI REPORTED 7.73
INCHES...BUT OVER THE 6 HOUR PERIOD FROM 8 AM TO 2 PM ONLY 0.42
INCHES OF RAIN FELL. THROUGHOUT THE DAY TODAY...RAIN HAS PASSED OVER
MAUI COUNTY AND OAHU FROM TIME TO TIME. THE HEAVIEST RAIN AND
THUNDERSTORMS HAVE REMAINED NORTHEAST OF THE SMALLER ISLANDS THUS
FAR.

THE 500 MB TEMPERATURE AT BOTH HILO AND LIHUE THIS AFTERNOON
REMAINED STEADY AT -13 CELSIUS. WHILE BOTH SOUNDINGS SHOW AN
UNSTABLE AIRMASS...THE HILO SOUNDING SHOWS MORE MOISTURE.

STILL HAVE GOOD MODEL AGREEMENT WITH THE TROUGH LINGERING OVER THE
ISLANDS THROUGH THE WEEKEND...AND THEN MOVING EAST AT THE START OF
THE WORK WEEK. EXPECT WET TRADES TO CONTINUE THROUGH THE WEEKEND FOR
THE REMAINING ISLANDS WITH THE GREATEST RAINFALL OCCURRING OVER
WINDWARD FACING SLOPES. THE WINDS ACROSS THE SMALLER ISLANDS WILL
REMAIN BREEZY...BUT ARE EXPECTED TO REMAIN BELOW ADVISORY CRITERIA.

ANOTHER UPPER LEVEL TROUGH IS EXPECTED TO FORM NORTHWEST OF THE
ISLANDS...MOVING CLOSER TO THE ISLANDS AND DEVELOPING A LOW ALONG
THE TROUGH BY MID WEEK. THE LATEST GUIDANCE CONTINUES TO KEEP THE
SURFACE SYSTEM WELL WEST OF THE ISLANDS.

&&

.MARINE...
WINDS HAVE DIED DOWN A BIT OVER SOME OF THE COASTAL WATERS AND AS
SUCH THE SMALL CRAFT ADVISORY HAS BEEN REDUCED TO THE MORE TYPICAL
WINDY AREAS.

THE TRADE WIND SWELL CONTINUES TO PRODUCE ADVISORY LEVEL SURF ALONG
EAST FACING SHORES. THE WINDS ARE EXPECTED TO CONTINUE...AND AS SUCH
THE HIGH SURF ADVISORY HAS BEEN EXTENDED THROUGH 6 PM SATURDAY.

A NEW WEST NORTHWEST SWELL WILL ARRIVE ON TUESDAY AND BUILD INTO
WEDNESDAY PRODUCING SURF NEAR THE ADVISORY LEVEL ALONG NORTH AND
WEST FACING SHORES.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY UNTIL 600 PM SATURDAY FOR EAST FACING
SHORES OF KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND.

WINTER WEATHER ADVISORY UNTIL 600 AM SATURDAY FOR BIG ISLAND SUMMITS.

SMALL CRAFT ADVISORY UNTIL 600 AM SATURDAY FOR THE SOUTH BIG ISLAND
WATERS...MAALAEA BAY...AND THE KAIWI PAILOLO AND ALENUIHAHA CHANNELS.

&&