Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 030028 CCA
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC WED JUN 03 2015

BASED ON DATA THROUGH 0000 UTC JUNE 03 2015

WATER VAPOR LOOP SHOWS AN UPPER LOW NEAR 27N163W...ABOUT 390 MILES
NORTHWEST OF THE MAIN HAWAIIAN ISLANDS. THIS FEATURE IS MARKED BY A
SWIRL OF HIGH CLOUDS FROM 28N TO 30N BETWEEN 160W AND 167W. EARLIER
CUMULONIMBUS...CB...ALONG ITS SOUTHERN FLANK HAVE DISSIPATED. THIS
UPPER LOW APPEARS TO BE DRIFTING TOWARD THE EAST NORTHEAST SLOWLY. A
300 TO 400 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS NORTH OF A LINE
FROM 40N138W TO 37N150W TO 36N160W TO 30N170W TO 30N180W MARKS A
FRONTAL BAND FAR NORTHWEST OF THE MAIN HAWAIIAN ISLANDS. THIS CLOUD
BAND IS SPREADING EASTWARD ALONG 30N BUT IS NEARLY STATIONARY
FARTHER TO THE SOUTH.

A BROAD ANTICYCLONIC CIRCULATION DOMINATES LOW LEVEL FLOW ACROSS THE
NORTH PACIFIC SOUTHEAST OF THE FRONTAL CLOUD BAND. CENTERED NEAR
36N138W...THIS CIRCULATION...ACTUALLY A SUBTROPICAL HIGH...HAS AN
ASSOCIATED RIDGE EXTENDING SOUTHWEST THROUGH 32N160W AND 28N175W.
LOW LEVEL FLOW SOUTH OF THE RIDGE IS GENERALLY FROM EAST TO
WEST...INCLUDING ACROSS LOCAL HAWAIIAN WATERS.

VISIBLE IMAGERY SHOWS CLOUD COVER HAS INCREASED ACROSS THE ISLANDS
SINCE THIS MORNING...BUT REMAINS SPARSE OVER COASTAL WATERS. MAUKA
SECTIONS OF KAUAI HAVE BROKEN LOW CLOUDS. BROKEN TO OVERCAST LOW
CLOUDS COVER THE KOOLAU AND WAIANAE SUMMITS ON OAHU AS WELL AS THE
EASTERN THIRD OF MOLOKAI. BROKEN LOW CLOUDS COVER NORTHEAST-FACING
SLOPES OF LANAI. OVERCAST LOW CLOUDS COVER ALL HALEAKALA SLOPES ON
MAUI AS WELL AS WINDWARD SLOPES OF THE WEST MAUI MOUNTAINS. OVERCAST
LOW CLOUDS ALSO COVER ALL WINDWARD BIG ISLAND SHORES AND SLOPES.
BROKEN TO OVERCAST LOW CLOUDS COVER KAU AND KONA SLOPES SOUTH OF
KAILUA-KONA. SATELLITE LOOP SHOWS LOW CLOUDS MOVING ACROSS LOCAL
WATERS TOWARD THE WEST AT 10 TO 15 MPH.

AN AREA OF MIXED STABLE AND UNSTABLE LOW CLOUDS IS APPROACHING THE
MAIN HAWAIIAN ISLANDS FROM THE EAST...BUT REMAINS JUST OUTSIDE
COASTAL WATERS AT THIS HOUR. THESE CLOUDS WILL LIKELY REACH THE
ISLANDS OVERNIGHT.

$$

POWELL










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