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Hawaiian Islands Satellite Interpetation Message

928
ATHW40 PHFO 231202
SIMHI

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

BASED ON DATA THROUGH 1200 UTC NOVEMBER 23 2014

WATER VAPOR IMAGES SHOWED A SHALLOW TROUGH OF LOW PRESSURE IN THE
MIDDLE ATMOSPHERE EXTENDING FROM WEST TO EAST JUST SOUTH OF 20N. A
JET STREAM ASSOCIATED WITH THE TROUGH PULLED THIN HIGH CLOUD LAYERS
OUT OF THE ITCZ TO THE SOUTH...PARTLY TO MOSTLY OBSCURING LOWER
FEATURES SOUTH OF THE CURVE FROM 20N 140W TO 20N 159W TO 10N 180.

A STRONGER TROUGH IN THE MIDDLE ATMOSPHERE DEEPENED FROM THE
NORTHWEST TOWARD THE MAIN HAWAIIAN ISLANDS. A CLOUD BAND ASSOCIATED
WITH A FRONT SUPPORTED BY THE TROUGH WAS LOCATED WITHIN 180 MILES OF
THE CURVE FROM 30N 165W TO 26N 170W TO 22N 180 AND FURTHER NORTHEAST
AND WEST. THIS BAND CONSISTED OF SEPARATING CLOUD LAYERS AT A
VARIETY OF HEIGHTS. DENSELY TO MODERATELY PACKED COLD-AIR CUMULI
PREVAILED NORTHWEST OF THE BAND. TOWERING CUMULI AND THEIR LAYERED
DEBRIS CLOUDS ALSO POSSIBLY ASSOCIATED WITH THE TROUGH IN THE MIDDLE
ATMOSPHERE OCCURRED WEST OF THE CURVE FROM 16N 180 TO 18N 178W TO
19N 170W TO 11N 175W TO 11N 180.

TO THE SOUTH...LIGHT THUNDERSTORM ACTIVITY CONTINUED IN THE ITCZ
FROM 09N TO 04N. LAYERED MIDDLE TO HIGH DEBRIS CLOUDS FROM THIS AND
EARLIER CONVECTION MOSTLY TO PARTLY OBSCURED LOWER FEATURES FROM THE
EQUATOR TO NEAR 20N AS DESCRIBED IN THE FIRST PARAGRAPH.

OTHERWISE...CLOUD COVER ACROSS HAWAIIAN WATERS CONSISTED MAINLY OF
LOOSE CLUMPS AND STREAMS OF MARINE STRATOCUMULI AND CUMULI EAST OF
THE CURVE FROM 30N 157W TO 25N 160W TO 17N 153W TO 13N 140W. THESE
STREAMS CURVED FROM SOUTHEAST TOWARD THE NORTHWEST AND THEN THE
NORTH. INDIVIDUAL SMALL CUMULI ALSO WERE PRESENT THROUGHOUT...AND
WEST OF 158W GENERALLY MOVED TOWARD THE WEST AT AROUND 15 MILES AN
HOUR. ALL THESE CLOUDS TYPICALLY ROSE TO HEIGHTS OF 7000 TO 10000
FEET.

ACROSS THE MAIN HAWAIIAN ISLANDS...THIN HIGH CLOUD LAYERS FROM THE
ITCZ PARTLY OBSCURED LOWER FEATURES OVER THE BIG ISLAND. WHERE IT
WAS VISIBLE...LOWER CLOUD COVER CONSISTED MOSTLY OF MARINE CUMULI
AND STRATOCUMULI MOVING ASHORE ALONG SLOPES FACING EAST TO
SOUTHEAST. THESE LOWER CLOUDS GENERALLY ROSE TO HEIGHTS OF 6000 TO
9000 FEET. RADAR DATA FROM NEAR THE ISLANDS SHOWED SCATTERED SHOWERS
WELL OFFSHORE TO THE NORTH OF MOLOKAI...SOUTH OF OAHU...AND
SOUTHEAST OF THE BIG ISLAND...BUT ISOLATED SHOWERS AT MOST ELSEWHERE.

$$

RYSHKO



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It was last modified on: Tue, Sep 21 2010 - 2314 UTC
Send comments to: Ryan Lyman