Satellite Interpretation Message
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000
ATHW40 PHFO 171200
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1200 UTC THU APR 17 2014

BASED ON DATA THROUGH 1130 UTC APRIL 17 2014

LOW CEILINGS...SOME WITH ACCOMPANYING SHOWERS...HAVE BEEN AT LEAST
INTERMITTENT OVER WINDWARD AND MAUKA SECTIONS ON THE INDIVIDUAL
ISLES THIS EARLY MORNING.  THIS HAS ESPECIALLY BEEN THE CASE OVER
OAHU...EAST MAUI...AND THE BIG ISLAND AS OF BULLETIN TIME.  LEEWARD
AREAS ARE PREDOMINANTLY CLEAR TO PARTLY CLOUDY.  LOW CLOUD MOVEMENT
IS FROM THE EAST-NORTHEAST NEAR 25 MPH ACROSS THE ALOHA STATE.

A SMALL CLUSTER OF BROKEN SHOWERY LOW CLOUDS EXISTS OVER AND
IMMEDIATELY EAST OF THE BIG ISLAND AND IS HEADING WEST-SOUTHWEST ON
THE PREVAILING TRADE FLOW.  SKIES ARE OTHERWISE CLEAR TO SCATTERED
OVER THE ADJACENT COASTAL WATERS.

SINCE LAST EVENING...THERE HAVE BEEN SUBTLE CHANGES IN THE
ATMOSPHERE ABOVE 25 THOUSAND FEET...ACCORDING TO THE MOST RECENT
WATER VAPOR IMAGES.  THE AXIS OF A TROUGH IS ROUGHLY ALONG A LINE
FROM 23N153W TO JUST OVER MAUI COUNTY TO 15N166W.  THE SOUTHERN
PORTION OF THE SYSTEM HAS BEEN DRIFTING WEST AND APPEARS TO BE
CONSOLIDATING THERE...WHILE THE NORTHERN SEGMENT HAS BEEN NEARLY
STATIONARY AND WEAKENING.  UPPER WINDS EAST OF THE TROUGH AXIS ARE
FROM THE SOUTH AND SOUTHWEST...AND HIGH CLOUDS...DEBRIS FROM
CONVECTION THAT HAS BEEN OCCURRING FAR SOUTH AND SOUTHWEST OF
HAWAII...HAVE BEEN RIDING THESE WINDS TOWARD THE NORTH AND
NORTHEAST.  SOME CIRRUS ELEMENTS ARE OCCASIONALLY GETTING WITHIN 20
MILES EAST OF THE BIG ISLAND.

A FRONT FAR WEST OF THE STATE HAS CROSSED THE DATE LINE NEAR 30N AS
OF BULLETIN TIME.  THE FEATURE IS STILL ONLY PERIPHERALLY AFFECTING
MIDWAY ATOLL...WITH MAINLY HIGH CLOUD CEILINGS AND WINDS FROM THE
SOUTHWEST NEAR 10 MPH AS OF THIS WRITING.

SHOWERS AND THUNDERSTORMS HAVE INCREASED IN NUMBER AND INTENSITY
OVER THE PAST SEVEN HOURS ALONG THE INTERTROPICAL CONVERGENCE ZONE
FAR SOUTH OF HAWAII.  MOST OF THE CONVECTION HAS BEEN FIRING FROM
03N TO 08N EAST OF 165W.  MORE ACTIVITY IS OCCURRING SOUTH OF 03N
WEST OF 174W.

$$

KINEL





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