Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 191829
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC SAT APR 19 2014

BASED ON DATA THROUGH 1800 UTC APRIL 19 2014

A STABLE TRADE WIND FLOW DOMINATES ACROSS MOST OF THE REGION...WHILE
A WEAK UPPER LEVEL LOW IS SPINNING ABOUT 600 MILES TO THE SOUTHWEST
OF THE MAIN HAWAIIAN ISLANDS.

THE TRADE WINDS ARE BEING DRIVEN BY A SURFACE HIGH CENTERED NORTH OF
30N AND ARE ONLY PARTIALLY INTERRUPTED BY A DISSIPATING FRONT
LOCATED 500 MILES NORTH OF KAUAI. THE NEARLY STATIONARY FEATURE IS
MARKED BY A 100 MILE-WIDE BAND OF OVERCAST LOW CLOUDS CENTERED ALONG
30N161W...27N170W...AND 28N175W.

OVER THE MAIN HAWAIIAN ISLANDS...THE FIRST VISIBLE IMAGES OF THE DAY
SHOW A MIX OF SCATTERED TO LOCALLY BROKEN STRATOCUMULUS CLOUDS
MOVING IN THE TRADE WIND FLOW FROM THE EAST AT 20 TO 25 MPH. THESE
CLOUDS ARE PILING UP ON WINDWARD SLOPES OF ALL ISLANDS...WHILE
LEEWARD AREAS ARE MOSTLY FREE OF LOW CLOUDS. CLOUD COVER INCREASES
SUBSTANTIALLY TO THE EAST OF THE STATE. A FIELD OF BROKEN
STRATOCUMULUS WITH A FEW EMBEDDED CUMULUS CLOUDS RUNS BETWEEN 27N
AND 17N EAST OF 155W.

A WEAK NEARLY STATIONARY UPPER LEVEL LOW IS CENTERED SOUTHWEST OF
THE ISLANDS NEAR 16N165W. THIS FEATURE IS DRIVING A NARROW BAND OF
OVERCAST LAYERED CLOUDS ON ITS SOUTHEAST FLANK ALONG 17N160W...
14N161W...AND 11N163W. LIGHTNING DETECTION PICKED UP A THUNDERSTORM
OVERNIGHT...AND TOPS CONTINUE TO RISE AS HIGH AS 45000 FT. THE UPPER
LOW IS ALSO GENERATING A SHIELD OF BROKEN HIGH CLOUDS FROM 17N TO
21N BETWEEN 166W AND 153W. THESE CLOUDS HAVE THINNED OVER THE STATE
SINCE LAST NIGHT.

$$

DWROE




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