Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 050030
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC THU MAR 05 2015

BASED ON DATA THROUGH 0000 UTC MARCH 05 2015

AS OF 2 PM...THE TRAILING EDGE OF A LARGE AREA OF OVERCAST LAYERED
CLOUDS...ASSOCIATED WITH A FAST-MOVING SHORTWAVE TROUGH ALOFT...WAS
MOVING QUICKLY EASTWARD ACROSS THE MAIN HAWAIIAN ISLANDS. THE RAGGED
BACK EDGE WAS THROUGH 23N159W TO 20N158W TO 17N157W. HOWEVER...EVEN
TO THE WEST OF THIS LINE...AND TO THE SOUTHEAST OF A LINE FROM
18N167W 23N159W...THERE WERE BROKEN TO OVERCAST MID-LEVEL CLOUDS.
THESE MID AND HIGH CLOUD FEATURES WERE COMPLETELY OBLITERATING THE
VIEW OF THE LOWER CLOUD FEATURES OVER AND NEAR THE MAIN HAWAIIAN
ISLANDS. NORTHWEST OF A LINE FROM 18N167W 23N159W WAS AN AREA OF
BROKEN MIXED CUMULUS AND STRATOCUMULUS SLIDING TOWARD THE SOUTHWEST.

THE BLENDED TOTAL PRECIPITABLE WATER PRODUCT...AN INDICATION OF THE
INTEGRATED MOISTURE FROM THE SURFACE TO THE TOP OF THE ATMOSPHERE
BASED ON MEASUREMENTS FROM SATELLITE...SHOW A SHARP GRADIENT OF
MOISTURE REMAINS OVER THE MAIN HAWAIIAN ISLANDS EARLY THIS
AFTERNOON. DEEPER MOISTURE WAS LOCATED OVER MAUI COUNTY AND THE BIG
ISLAND...WITH OAHU NEAR THE BOUNDARY OF THE AIRMASSES...AND MUCH
DRIER AIR LOCATED TO THE NORTHWEST INCLUDING OVER KAUAI. OVER THE
PAST 24 HOURS...THIS PERSISTENT GRADIENT HAD SHARPENED UP AND HAD
SHIFTED A LITTLE FARTHER TOWARD THE NORTHWEST. RELATIVELY DEEP
MOISTURE CONTINUES TO EXTEND UPSTREAM FROM THE BIG ISLAND...EAST TO
NEAR 150W.

WATER VAPOR IMAGERY WAS SHOWING A BROAD AND SOMEWHAT ILL-DEFINED
MID-TO-UPPER LEVEL ANTICYCLONE TO THE NORTHWEST OF THE MAIN
ISLANDS...CENTERED ROUGHLY NEAR 29N172W. RIDGES EXTEND WELL TO THE
EAST AND THE WEST. THIS FEATURE IS PRESSING TOWARD THE SOUTHEAST AT
ABOUT 10 TO 15 MPH.

$$
R BALLARD





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