Satellite Interpretation Message
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000
ATHW40 PHFO 021230
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC THU JUL 02 2015

BASED ON DATA THROUGH 1200 UTC JULY 02 2015

BROKEN TO OVERCAST LAYERED CLOUDS COVER AN AREA BETWEEN 148W AND
153W NORTH OF 31N...MARKING THE EASTERN FLANK OF AN UPPER TROUGH.
THIS UPPER TROUGH HAS AN AXIS EXTENDING THROUGH 48N150W AND 28N150W.
THIS UPPER TROUGH HAS INDUCED A BROAD ILL-DEFINED LOW AT THE SURFACE
NEAR 40N160W. A RAGGED 100 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS...MARKING A FRONTAL BOUNDARY...LIES ALONG THE WESTERN EDGE OF
THE LAYERED CLOUDS...EMERGING AS A SEPARATE FEATURE WEST OF A LINE
FROM 32N155W TO 25N160W TO 20N168W. ADDITIONAL OVERCAST LAYERED
CLOUDS ARE EDGING INTO THE CENTRAL NORTH PACIFIC NORTH OF 37N AND
WEST OF 170W.

SATELLITE LOOP SHOWS LOW LEVEL FLOW ACROSS THE CENTRAL NORTH PACIFIC
IS GOVERNED BY A PAIR OF ANTICYCLONIC CIRCULATIONS...ONE ON EACH
SIDE OF THE UPPER TROUGH. THE EASTERN CIRCULATION HAS A TROUGH AXIS
EXTENDING THROUGH 40N138W...30N147W AND 20N155W. THE WESTERN
CIRCULATION HAS AN AXIS EXTENDING THROUGH 21N165W AND 30N180W. A COL
IN THE LOW LEVEL FLOW BETWEEN THESE TWO ANTICYCLONIC CIRCULATIONS
LIKELY LIES ALONG THE FRONTAL BOUNDARY ABOUT 200 MILES TO THE WEST
OF THE MAIN HAWAIIAN ISLANDS.

A SUBTROPICAL JETSTREAM IS MARKED BY A NARROW BAND OF PATCHY BROKEN
HIGH CLOUDS SOUTH OF A LINE FROM 17N180W TO 19N170W TO 19N160W TO
17N150W TO 18N140W. BROKEN TO OVERCAST LAYERED CLOUDS AND EMBEDDED
ISOLATED CUMULONIMBUS...CB...LIE SOUTH OF A LINE FROM 12N180W TO
16N170W TO 10N156W. OVERCAST LAYERED CLOUDS WITH EMBEDDED SCATTERED
TO NUMEROUS CB LIE SOUTH OF A LINE FROM 10N151W TO 14N140W TO
13N120W. THE PORTION OF THE LATTER CB AREA EAST OF 140W IS BEING
WATCHED CLOSELY BY THE NATIONAL HURRICANE CENTER IN MIAMI FOR
POSSIBLE TROPICAL CYCLONE DEVELOPMENT.

LOW LEVEL FLOW ACROSS THE MAIN HAWAIIAN ISLANDS REMAINS
COMPLEX...WITH LIGHT EASTERLIES NOTED EAST OF MAUI AND THE BIG
ISLAND. LIGHT SOUTHWESTERLIES ARE NOTED NEAR KAUAI. CLOUD COVER IS
RATHER SPARSE ACROSS THE SMALLER ISLANDS...WITH SCATTERED LOW CLOUDS
TO CLEAR SKIES EVERYWHERE. IN CONTRAST...THE BIG ISLAND HAS BROKEN
TO OVERCAST LOW CLOUDS ACROSS ALMOST ALL SLOPES AND INTERIOR
AREAS...LEAVING ONLY THE HIGHEST PEAKS...EASTERN PUNA AND LEEWARD
KOHALA BENEATH SCATTERED LOW CLOUDS TO CLEAR SKIES.

$$

POWELL








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