Flash Flood Warning 26, NWS Honolulu, HI

000
WGHW50 PHFO 081908
FFWHFO
HIC001-082300-
/O.EXT.PHFO.FF.W.0026.000000T0000Z-071208T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
904 AM HST SAT DEC 8 2007

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS EXTENDED THE

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

* UNTIL 100 PM HST

* AT 900 AM HST...BIG ISLAND CIVIL DEFENSE REPORTED THE CONTINUED 
  CLOSURE OF HIGHWAY 11 IN THE KAU DISTRICT. THE ROADWAY IS CLOSED 
  NEAR KAWA FLATS...BETWEEN MILE MARKERS 58 AND 59. WATER COVERS THE 
  ROADWAY TO A DEPTH OF ONE AND A HALF FEET...MAKING THE ROAD  
  IMPASSABLE. ONLY LIGHT TO MODERATE RAIN IS CURRENTLY FALLING...BUT 
  RUNOFF FROM EARLIER HEAVY RAIN CONTINUES.  

A FLASH FLOOD WARNING MEANS FLASH FLOODING IS IMMINENT OR OCCURRING.
DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT.
TURN AROUND...DON/T DROWN.

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 100 PM HST...IF HIGHWAY 
11 REMAINS CLOSED.

LAT...LON 1916 15558 1921 15544 1917 15539 1913 15546
      1906 15556

$$

BIRCHARD

000
WGHW70 PHFO 082301
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
101 PM HST SAT DEC 8 2007

HIC001-082311-
/O.EXP.PHFO.FF.W.0026.000000T0000Z-071208T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAWAII IN HAWAII COUNTY-
101 PM HST SAT DEC 8 2007

...THE FLASH FLOOD WARNING HAS EXPIRED FOR THE ISLAND OF HAWAII IN
HAWAII COUNTY...

BIG ISLAND CIVIL DEFENSE OFFICIALS REPORT THAT RUNOFF HAS SUBSIDED 
ALONG HIGHWAY 11 NEAR KAWA FLATS...AND THAT ONE LANE HAS BEEN OPENED 
TO VEHICULAR TRAFFIC. 

A FLASH FLOOD WATCH REMAINS IN EFFECT.

LAT...LON 1916 15558 1921 15544 1917 15539 1913 15546
      1906 15556

$$

BIRCHARD

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST SAT DEC 8 2007

.SYNOPSIS...
WIDESPREAD RAIN WITH LOCALLY HEAVY SHOWERS TODAY WILL TAPER OFF
GRADUALLY OVER THE REST OF THE WEEKEND AND SHIFT TO NORTHEAST SLOPES
AS TRADE WINDS RETURN BY THE MIDDLE OF THE COMING WEEK.

&&

.DISCUSSION...
THE DEEPLY STACKED LOW JUST NORTH OF THE MAIN HAWAIIAN ISLANDS DID
SHOW SIGNS OF MOVING NORTH AND REJOINING THE GENERAL CIRCULATION...
BUT LIKE AN UNWELCOME GUEST IT LINGERED ON THE DOORSTEP...HAT IN
HAND AS IT WERE. TO BE MORE PRECISE...SHORT WAVES ROTATING AROUND
THE LOW DEEPENED IT PERIODICALLY...AND PROVIDED ADDITIONAL IMPETUS
FOR THE DEVELOPMENT OF SUBSIDIARY FEATURES...LIKE THE NEARLY
STATIONARY BAND OF SHOWERS LOCATED TO THE NORTHWEST OF THE BIG
ISLAND. SOUTHEAST SLOPES OF THE BIG ISLAND IN PARTICULAR EXPERIENCED
ONGOING...TERRAIN-ANCHORED HEAVY RAIN AS THE RESULT OF THE UPPER LOW
JOINING FORCES WITH SPEED CONVERGENCE IN THE PREDOMINANTLY SOUTHERLY
LOW-LEVEL FLOW.

ALTHOUGH THE HEAVIEST PRECIPITATION HAD SHIFTED AWAY FROM OAHU AND
KAUAI COUNTY...A BAND OF MODERATE SHOWERS FORMED AT THE BOUNDARY
BETWEEN THE NORTHWESTERLY AND SOUTHWESTERLY FLOW IN CONCERT WITH
ONE OF THE SHORT WAVES ALOFT...GIVING KAUAI A THOROUGH SOAKING...AND
ON ITS WAY TO PROVIDE THE SAME FOR OAHU. ADDITIONAL BOUNDARIES...
SUCH AS THAT BETWEEN THE SOUTHERLIES AND SOUTHWESTERLIES...SERVED AS
YET MORE FOCI FOR SQUEEZING RAINFALL FROM THE MOIST AIRMASS.

WIND SPEED WAS DOWN AT LOWER ELEVATIONS...AND THE MARINE FORECASTS
REFLECTED THE REMOVAL OF THE SMALL CRAFT ADVISORY...BUT AT HIGHER
ELEVATIONS CONDITIONS STILL BARELY WARRANTED A WIND ADVISORY. IF
GUIDANCE IS RIGHT...THEN IT SHOULD BE POSSIBLE TO DROP THE WIND
ADVISORY AT 6 AM HST AS EXPECTED. THIS DEVELOPMENT WOULD CORRELATE
NICELY WITH THE ORIENTATION OF THE LOW AND DIURNAL WIND TRENDS...BUT
IN THE EVENT OF THE UNEXPECTED...AN UPDATE MAY BE NEEDED BEFORE 6 AM
TO EXTEND THE ADVISORY.

OTHERWISE...THE FORECAST HAS BEEN REBUILT EXTENSIVELY TO FOLLOW
GUIDANCE. THE MODELS CONTINUE TO AGREE FAIRLY WELL WITH ONE
ANOTHER...AND APPEAR TO PLACE THE GROSS AREAS OF PRECIPITATION
WELL...THOUGH FINE DETAIL STILL FINDS WAYS TO SURPRISE. THE WIND
FIELD ALSO APPEARS TO BE MORE OR LESS ON TRACK. ASIDE FROM THE
SHORT-TERM EMERGENCIES...THE PROBLEM OF THE DAY PROBABLY STILL
CONSISTS OF MANAGING THE TRANSITION TO TRADE WINDS THROUGH THE
BEGINNING OF THE COMING WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...

WIND ADVISORY FOR SUMMITS OF HALEAKALA AND BIG ISLAND THROUGH 6 AM
TODAY.

FLASH FLOOD WATCH FOR ALL ISLANDS THROUGH NOON TODAY.

&&

RYSHKO