Wind Advisory 25, NWS Honolulu, HI

544 
WWHW70 PHFO 242328
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
128 PM HST SUN MAR 24 2013

...HIGH WIND WARNING FOR THE BIG ISLAND SUMMITS UNTIL THIS
EVENING...

.WINDS AT THE SUMMITS ARE REACHING HIGH WIND WARNING LEVELS AND
WILL CONTINUE DURING THE REST OF THE AFTERNOON HOURS...THEN
QUICKLY SUBSIDING THIS EVENING.

HIZ028-250400-
/O.UPG.PHFO.WI.Y.0025.000000T0000Z-130325T0400Z/
/O.NEW.PHFO.HW.W.0005.130324T2328Z-130325T0400Z/
BIG ISLAND SUMMITS-
INCLUDING THE CITY OF...MAUNA LOA AND MAUNA KEA ABOVE 8000 FEET
128 PM HST SUN MAR 24 2013

...HIGH WIND WARNING IN EFFECT UNTIL 6 PM HST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT UNTIL 6 PM HST THIS EVENING. THE
WIND ADVISORY IS NO LONGER IN EFFECT. 

* WINDS...SOUTHWEST 25 TO 45 MPH WITH LOCALIZED GUSTS OVER 50 MPH.

* TIMING...THROUGH 6 PM HST THIS EVENING.

* IMPACTS...WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
  FOR HIGH PROFILE VEHICLES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS WINDS OF AT LEAST 40 MPH...OR GUSTS OF
60 MPH OR HIGHER...ARE EXPECTED.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
940 AM HST SUN MAR 24 2013

.SYNOPSIS...
MOISTURE ASSOCIATED WITH THE REMNANTS OF A COLD FRONT WILL CONTINUE
TO LINGER ACROSS THE AREA...ALONG WITH A WET PATTERN REMAINING IN
PLACE THROUGH THE MIDDLE OF THE WEEK. AN UPPER LEVEL TROUGH NEAR THE
WESTERN PORTIONS OF THE ALOHA STATE MAY ALSO HELP IN ENHANCING
SHOWERS TODAY. A JET STREAM WILL KEEP BRINGING HIGH AND MID LEVEL
CLOUDS...MAINTAINING MOSTLY CLOUDY SKIES ACROSS THE AREA THROUGH AT
LEAST TONIGHT.

&&

.DISCUSSION...
A WEAK SFC TROUGH...ASSOCIATED WITH THE REMNANTS OF A DISSIPATING
FRONTAL BOUNDARY...REMAINS LOCATED OVER MAUI COUNTY AND ENHANCING
LOCAL SHOWER ACTIVITY...ESPECIALLY OVER THE CENTRAL PORTIONS OF THE
ISLAND CHAIN. RAINFALL IN GENERAL REMAINS LIGHT. HOWEVER...WITH
ENOUGH LINGERING MOISTURE ACROSS THE ISLANDS...THERE IS POTENTIAL
FOR SOME LOCALIZED HEAVY SHOWERS THROUGHOUT THE DAY ESPECIALLY OVER
MOUNTAIN AREAS. ALSO...A LARGE CANOPY OF HIGH/MID LVL CLOUDS IS
STREAMING OVER THE AREA FROM SW TO NE AS THE CORE OF A SUBTROPICAL
JET STREAM REMAINS IN PLACE TO THE N/NW OF THE MAIN HAWAIIAN
ISLANDS. THIS WILL KEEP MOSTLY CLOUDY SKIES TODAY. THIS CLOUD
COVERAGE ALOFT COULD PROVIDE ADDITIONAL STRATIFORM RAIN AT TIMES.
LATEST IR/WV SATELLITE DATA DEPICTS AN UPPER LVL TROUGH AROUND THE
WESTERN EDGE OF THE ISLAND CHAIN...ADDING INSTABILITY AND POTENTIAL
FOR ENHANCED SHOWERS...MAINLY OVER KAUAI AND OAHU TODAY.

MEANWHILE...A SFC HIGH PRESSURE SYSTEM FAR NW OF KAUAI IS SLOWLY
MIGRATING TO THE SE TOWARDS THE ISLANDS AND BRINGING MODERATE NE
TRADES FROM KAUAI TO MOLOKAI...WHILE RELATIVELY WEAK AND VARIABLE
FLOW IS BEING OBSERVED OVER THE EASTERN HALF OF THE ISLAND CHAIN
DUE TO THE INFLUENCE OF THE SFC TROUGH. THIS SCENARIO WILL GRADUALLY
MODIFY DURING THE NEXT COUPLE OF DAYS AS THE TROUGH WEAKENS AND THE
HIGH MOVES CLOSER TO THE AREA...WITH WINDS VEERING TO A MORE NE/E
FLOW ACROSS THE ALOHA STATE.

THE RATHER WET PATTERN IS EXPECTED TO CONTINUE THROUGH THE FIRST
HALF OF THE WEEK...WITH THE FOCUS FOR RAINFALL SHIFTING TO WINDWARD
AND MOUNTAIN LOCATIONS THROUGH MID WEEK.  EVEN FOR THE SECOND HALF
OF THE WORK WEEK...THE INFLUENCE OF ANOTHER UPPER LVL TROUGH
APPROACHING FROM THE WEST COULD BRING UNSTABLE AND WETTER THAN
NORMAL CONDITIONS ACROSS THE ISLAND CHAIN...ESPECIALLY FOR THE
SMALLER ISLANDS.

MODELS ALSO SUGGEST THE DEVELOPMENT OF A DEEP SFC LOW PRESSURE
SYSTEM FAR N/NE OF THE ISLANDS BY NEXT WEEKEND...BUT ITS OVERALL
IMPACTS OVER THE AREA REMAIN HIGHLY UNCERTAIN ATTM. THEREFORE...IT
IS REASONABLE TO WAIT FOR UPCOMING MODEL RUNS BEFORE EMBRACING ANY
PARTICULAR SOLUTION FOR NEXT WEEKEND.

&&

.AVIATION...
MOISTURE FROM THE REMNANTS OF A FRONTAL BOUNDARY WILL PRODUCE
WIDESPREAD MVFR...AND ISOLATED IFR CONDITIONS FOR THE ISLANDS.

AIRMET ZULU FOR MOD RIME ICE WILL REMAIN IN EFFECT THROUGH TODAY FOR
THE MAIN HAWAIIAN ISLANDS AS LAYERED CLOUDS UP TO FL300 FEET STREAM
ACROSS THE STATE. AIRMET SIERRA FOR MOUNTAIN OBSCURATION WILL ALSO
REMAIN POSTED FOR THE ISLANDS OF KAUAI THROUGH MAUI...WITH THE
POSSIBILITY OF EXTENDING IT TO INCLUDE ALL ISLANDS.

&&

.MARINE...
A LONG PERIOD NORTHWEST SWELL WILL ARRIVE LATER TODAY AND BRING
MODERATE SURF FOR NORTH AND WEST FACING SHORES OF MOST OF THE
SMALLER ISLANDS. EXPECT HEIGHTS TO REMAIN BELOW ADVISORY LEVELS.
THIS SWELL WILL PEAK ON MONDAY...THEN GRADUALLY SUBSIDE THROUGH
WEDNESDAY. A SMALL SWELL ALONG SOUTH FACING SHORES SHOULD FADE AWAY
DURING THE NEXT COUPLE OF DAYS. NO SMALL CRAFT ADVISORY CONDITIONS
ARE EXPECTED ACROSS THE HAWAIIAN COASTAL WATERS THROUGH AT LEAST
THE MIDDLE OF THE WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

DISCUSSION/MARINE...REYNES
AVIATION...LUTU-MCMOORE