|
|
 |
|
|
Menu of Text Products for the Hawaiian Islands and the Tropical Pacific/Atlantic Oceans:
|
Narrow the Menu List
Select Time Limit: 12 hours | 24 hours | 48 hours | 72 hours | No time limit
Select Product Type: All | Routine Bulletins/FCSTS | Warnings/Watches/Advisories | HAWN Weather | Tropical | Marine | Aviation | Daily Obs | Special |
 |
Hawaiian Islands Synoptic Discussion and Guidance
144
FXHW60 PHFO 191936
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST WED JUN 19 2013
.SYNOPSIS...
A SURFACE RIDGE SEVERAL HUNDRED MILES NORTH OF THE STATE WILL
DRIVE MODERATE TO LOCALLY BREEZY TRADE WINDS THROUGH THE WEEK. A
TYPICAL SUMMERTIME RAINFALL PATTERN WILL FOCUS MODEST RAINFALL OVER
WINDWARD SLOPES OF ALL ISLANDS...WHILE LEEWARD BIG ISLAND SLOPES
SEE A FEW AFTERNOON SHOWERS.
&&
.DISCUSSION...
MODERATE TRADE WINDS WILL HOLD DURING THE NEXT COUPLE OF DAYS...
WITH LOCALLY BREEZY WINDS SETTLING IN FOR THE WEEKEND. A SURFACE
RIDGE ABOUT 550 MILES NORTH OF THE ISLANDS IS DRIVING THE TRADE
WINDS. A COLD FRONT APPROACHING FROM THE NORTHWEST IS WEAKENING THE
RIDGE SLIGHTLY...AND THE PRESSURE GRADIENT BETWEEN BUOYS 51101 AND
51003 HAS DECLINED BY NEARLY 1 MB SINCE THIS TIME YESTERDAY. THE
FRONT WILL PASS TO THE NORTH OVER THE NEXT COUPLE OF DAYS...
WEAKENING THE PRESSURE GRADIENT OVER THE STATE A LITTLE MORE AND
CAUSING TRADES TO DECLINE JUST A NOTCH. THE RIDGE WILL STRENGTHEN
ON FRIDAY INTO THE WEEKEND...CAUSING WINDS TO BECOME LOCALLY BREEZY
AGAIN.
EXPECT A RATHER TYPICAL...TRADE WIND RAINFALL PATTERN TO FOCUS
SHOWERS OVER WINDWARD SLOPES. RANDOM POCKETS OF SHOWERS MOVING ALONG
THE TRADE WIND FLOW WILL LIKELY LEAD TO SHORT TERM TWEAKING OF THE
POPS. MORNING SOUNDING AND RECENT AIRCRAFT DATA SHOW LOW TO MID
LEVEL RIDGING MAINTAINING STABLE CONDITIONS WITH AN INVERSION MAINLY
IN THE 7000 TO 8000 FOOT RANGE. AN UPPER LEVEL TROUGH OVERHEAD IS
NOT STRONG ENOUGH TO PRODUCE ANY LOW LEVEL INSTABILITY OVER THE
ISLANDS...BUT IT WILL CONTINUE TO PRODUCE HIGH CLOUDS EAST OF THE
STATE. RIDGING ALOFT WILL BUILD IN FROM THE EAST DURING THE
WEEKEND...POSSIBLY DECREASING POPS. IN ADDITION...AS THE UPPER
TROUGH DEPARTS TO THE WEST...WE COULD SEE PERIODS OF HIGH CLOUDS
SPREADING OVER THE ISLANDS.
&&
.AVIATION...
VFR WILL PREVAIL ACROSS MOST OF THE STATE. EXPECT ISOL MVFR CIGS
OVER WINDWARD SLOPES AND POSSIBLY PHTO...MAINLY AT NIGHT.
&&
.MARINE...
A SMALL CRAFT ADVISORY...SCA...IS IN EFFECT THROUGH THIS AFTERNOON
FOR LOCALLY STRONG TRADE WINDS AND ROUGH SEAS IN THE TYPICALLY
WINDY AREAS AROUND MAUI COUNTY AND THE BIG ISLAND. WITH A SLIGHT
DECLINE IN WINDS EXPECTED IN THE SHORT TERM...WE WILL LIKELY BE ABLE
TO DROP THE SCA FOR A DAY OR TWO. SCA CONDITIONS WILL REDEVELOP
ACROSS THE SAME AREAS ON FRIDAY OR SATURDAY.
NO SIGNIFICANT SWELLS ARE IN STORE. MODERATE AND ROUGH SURF WILL
PERSIST ALONG WINDWARD SHORES. SMALL BACKGROUND SOUTH SWELLS WILL
HOLD FOR THE NEXT FEW DAYS...FOLLOWED BY A MODERATE SOUTHEAST SWELL
FOR SUNDAY INTO EARLY NEXT WEEK. A MODERATE SOUTH SOUTHWEST SWELL IS
POSSIBLE BY THE MIDDLE OF NEXT WEEK. NORTH FACING SHORES WILL ALSO
LIKELY SEE A SMALL NORTHWEST SWELL MONDAY THROUGH WEDNESDAY.
&&
.HFO WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY UNTIL 600 PM HST TODAY FOR MAALAEA BAY...THE
WATERS SOUTH OF THE BIG ISLAND...AND THE PAILOLO AND ALENUIHAHA
CHANNELS.
&&
$$
WROE
Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office
|
|
This page is maintained voluntarily by the MKWC and the UHMET faculty, staff, and students.
It was last modified on: Tue, Sep 21 2010 - 2314 UTC
Send comments to: Ryan Lyman
|
|
