Satellite Interpretation Message
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000
ATHW40 PHFO 020532
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC THU JUL 02 2015

BASED ON DATA THROUGH 0500 UTC JULY 02 2015

OVERCAST LAYERED CLOUDS COVER AN AREA BETWEEN 145W AND 154W NORTH OF
28N...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 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 31N155W
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 JUST 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 WESTERLIES TO SOUTHWESTERLIES ARE NOTED NEAR KAUAI.
CLOUD COVER IS RATHER SPARSE ACROSS THE SMALLER ISLANDS...LIMITED TO
PATCHY BROKEN LOW CLOUDS ACROSS WINDWARD HALEAKALA SLOPES ON MAUI
AND ACROSS THE NORTHEAST THIRD OF KAUAI. 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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