Satellite Interpretation Message
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000
ATHW40 PHFO 210029
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC TUE APR 21 2015

BASED ON DATA THROUGH 0000 UTC APRIL 21 2015

AS OF 200 PM HST...VISIBLE SATELLITE IMAGERY SHOWED SCATTERED TO
BROKEN LOW CLOUDS BETWEEN 20N AND 30N FROM 140W TO 150W...WHICH WERE
AROUND 700 TO 800 MILES NORTHEAST OF THE BIG ISLAND. THESE CLOUDS
WERE TRACKING WEST-SOUTHWEST WITHIN THE TRADE WINDS AT 20 TO 25 MPH.
CLOUD TOPS WERE BELOW 10000 FEET DUE TO THE PRESENCE OF VERY DRY MID
TO UPPER-LEVEL AIR.

SCATTERED TO BROKEN LOW CLOUDS ASSOCIATED WITH A STATIONARY FRONTAL
BOUNDARY WERE SHOWN BETWEEN 29N AND 30N FROM 156W TO 165W. THESE
CLOUDS WERE TRACKING WESTWARD AROUND 20 MPH.

DEEP MOIST CONVECTION WITH EMBEDDED THUNDERSTORMS ASSOCIATED WITH
THE ITCZ WERE SHOWN BETWEEN THE EQUATOR AND 10N. DEBRIS CLOUDS
ASSOCIATED WITH THIS ACTIVITY WERE TRACKING NORTHEASTWARD BETWEEN
10N AND 15N FROM 150W TO 140W.

BROKEN TO OVERCAST LOW CLOUDS WERE GENERALLY FOCUSED OVER THE
WINDWARD SLOPES OF THE MAIN HAWAIIAN ISLANDS. CLOUD TOPS WERE BELOW
10000 FEET. BROKEN TO OVERCAST CONDITIONS WERE SHOWN ACROSS THE
LEEWARD SIDE OF THE BIG ISLAND DUE TO A COMBINATION OF DAYTIME
HEATING AND THE AFTERNOON SEA BREEZE. ELSEWHERE...ISOLATED TO
SCATTERED LOW CLOUDS WERE SHOWN ACROSS THE ISLANDS. AN AREA OF
BROKEN TO OVERCAST LOW CLOUDS ASSOCIATED WITH A CONFLUENT BOUNDARY
DOWNSTREAM OF THE BIG ISLAND WAS SHOWN BETWEEN 18N AND 20N FROM 165W
TO 157W. ELSEWHERE...ISOLATED TO SCATTERED LOW-LEVEL CLOUDS WERE
DEPICTED AROUND THE ISLANDS WITHIN THE TRADE WINDS AND WERE TRACKING
WEST-SOUTHWEST AT 15 TO 20 MPH.

$$

AG




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