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906
ATHW40 PHFO 231202
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC WED APR 23 2014

BASED ON DATA THROUGH 1200 UTC APRIL 23 2014

WATER VAPOR IMAGES SHOWED A BROAD AREA OF LOW PRESSURE IN THE MIDDLE
ATMOSPHERE OVER...AND TO THE SOUTHWEST THROUGH WEST...OF THE MAIN
HAWAIIAN ISLANDS. HIGH TO MIDDLE CLOUD LAYERS FORMED UNDER THIS
FEATURE WITHIN 75 MILES OF THE CURVE FROM 24N 158W TO 21N 158W TO
19N 160W. THE LOW ALSO PULLED HIGH TO MIDDLE CLOUD LAYERS OUT OF THE
ITCZ FURTHER SOUTH...PARTLY TO MOSTLY OBSCURING LOWER FEATURES
WITHIN 200 MILES OF THE CURVE FROM 27N 154W TO 21N 149W TO 14N 150W
TO 10N 155W.

TO THE NORTHWEST...LOW TO MIDDLE CLOUD LAYERS ASSOCIATED WITH A
FRONT COVERED HAWAIIAN WATERS NORTHWEST OF THE LINE FROM 30N 177W TO
29N 180. THIS FEATURE MOVED NORTHWEST SLOWLY. THINNER HIGH TO MIDDLE
CLOUD LAYERS ORIGINALLY ASSOCIATED WITH THE FRONT NOW PARTLY TO
MOSTLY OBSCURED LOWER FEATURES WITHIN 150 MILES OF THE CURVE FROM
30N 158W TO 24N 167W TO 19N 178W.

TO THE SOUTH...LIGHT THUNDERSTORM ACTIVITY CONTINUED IN THE ITCZ
FROM 09N TO 01N. LAYERED DEBRIS CLOUDS FROM THIS AND EARLIER
CONVECTION MOSTLY TO PARTLY OBSCURED LOWER FEATURES FROM 11N TO THE
EQUATOR...AND ALSO WRAPPED AROUND THE MID-LEVEL LOW FURTHER NORTH AS
DESCRIBED IN THE FIRST PARAGRAPH.

OTHERWISE...CLOUD COVER ACROSS HAWAIIAN WATERS CONSISTED MAINLY OF
MODERATELY TO DENSELY PACKED MARINE STRATOCUMULI AND CUMULI MERGING
INTO AREAS OF NEARLY SOLID LOW STRATUS OVERCAST. INDIVIDUAL SMALL
CUMULI ALSO WERE PRESENT THROUGHOUT. THESE CLOUDS WERE GREATEST IN
AREAL COVERAGE NORTH OF 20N AND EAST OF 160W...AND INCREASED IN
AREAL COVERAGE SUBSTANTIALLY WITH TIME OVER THE PAST SIX HOURS TO
THE EAST OF 150W. THEY GENERALLY ROSE TO HEIGHTS OF 8000 TO 10000
FEET...AND MOVED TOWARD THE WEST SOUTHWEST AT 15 TO 20 MILES AN HOUR.

ACROSS THE MAIN HAWAIIAN ISLANDS...HIGH TO MIDDLE CLOUD LAYERS
ASSOCIATED WITH THE MID-LEVEL LOW PARTLY OBSCURED LOWER FEATURES.
WHERE IT WAS VISIBLE...LOWER CLOUD COVER CONSISTED MOSTLY OF MARINE
STRATOCUMULI MOVING ASHORE ALONG SLOPES FACING EAST. LAYERED DEBRIS
CLOUDS FROM AFTERNOON CUMULUS BUILDUPS ON TUESDAY LARGELY HAD
DISSIPATED. THESE LOWER CLOUDS VARIED IN HEIGHT FROM 6000 TO 10000
FEET. RADAR DATA FROM NEAR THE ISLANDS SHOWED SCATTERED SHOWERS
OFFSHORE TO THE SOUTHEAST OF THE BIG ISLAND...BUT ISOLATED SHOWERS
AT MOST ELSEWHERE.

$$

RYSHKO






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