Satellite Interpretation Message
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000
ATHW40 PHFO 260528
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC SAT JUL 26 2014

BASED ON DATA THROUGH 0500 UTC JULY 26 2014

THE PRESSURE GRADIENT SOUTH OF A SURFACE RIDGE LOCATED ABOUT 1100
MILES NORTH OF HONOLULU IS MAINTAINING MODERATE TRADE WINDS ACROSS
THE MAIN HAWAIIAN ISLANDS EARLY THIS EVENING. THE LOW-LEVEL TRADE
WIND FLOW WAS CARRYING SCATTERED TO BROKEN LOW CLOUDS WITH EMBEDDED
ISOLATED SHOWERS ACROSS THE WINDWARD HAWAIIAN WATERS. THERE WERE
ALSO BANDS OF SCATTERED TO BROKEN LOW CLOUDS AND A FEW SHOWERS
OVER THE OCEAN LEEWARD OF MOST ISLANDS.

THE INDIVIDUAL LOW CLOUD ELEMENTS OVER THE WINDWARD WATERS WERE
GENERALLY MOVING TOWARD THE WEST SOUTHWEST AT ABOUT 15 MPH. THE
HIGHEST TOPS OF THE LOW CLOUDS IN THE VICINITY OF THE MAIN HAWAIIAN
ISLANDS WERE ESTIMATED TO BE 7 TO 8 THOUSAND FEET.

AS OF 700 PM HST FRIDAY...SCATTERED TO BROKEN LOW CLOUDS WERE ACROSS
MOST OF KAUAI. BROKEN LOW CLOUDS COVERED MOST OF THE WINDWARD SHORES
AND KOOLAU AND WAIANAE MOUNTAIN RANGES ON OAHU. THERE WERE SCATTERED
LOW CLOUDS ELSEWHERE ON OAHU. SCATTERED TO BROKEN LOW CLOUDS WERE
OVER THE NORTHEASTERN TIP OF MOLOKAI...AND PARTS OF LANAI. ON
MAUI...BROKEN TO LOCALLY OVERCAST LOW CLOUDS WERE ABOVE THE
NORTHEASTERN COASTAL AREAS...THE LOWER SLOPES OF MOUNT HALEAKALA AND
THE WESTERN MOUNTAINS. BROKEN TO LOCALLY OVERCAST LOW CLOUDS COVERED
MOST OF THE BIG ISLAND BELOW THE SUMMITS OF MAUNA LOA AND MAUNA KEA.

ACCORDING TO LOOPS OF WATER VAPOR IMAGERY...THE AXIS OF AN UPPER
LEVEL TROUGH EXTENDED FROM 30N 162W TO 23N 170W TO 19.5N 180W. THIS
UPPER LEVEL FEATURE PROPAGATED TOWARD THE EAST SOUTHEAST AT ABOUT 10
MILES PER HOUR DURING THE PAST 6 HOURS. A SUBTROPICAL JET STREAM
ALONG THE SOUTHEASTERN FLANK OF THIS TROUGH ALOFT EXTENDED FROM NEAR
19N 167W TO 26N 159W. SOUTHWESTERLY WINDS OF 55 TO 75 MILES PER HOUR
WERE WITHIN THE CORE OF THE JET STREAM. A BAND OF SCATTERED CIRRUS
EMBEDDED WITHIN THIS CORE OF THE JET WAS 175 MILES SOUTHEAST OF A
LINE FROM 26.5N 150.5W TO 18N 174.5W. ELSEWHERE...AN UPPER LEVEL
RIDGE EXTENDED NORTHWARD OVER THE EASTERN HALF OF THE MAIN HAWAIIAN
ISLANDS FROM AN UPPER LEVEL ANTICYCLONE CENTERED NEAR 15N 157.5W.
THIS UPPER LEVEL FEATURE WAS CONTRIBUTING TO THE STABLE CONDITIONS
ACROSS THE ALOHA STATE EARLY THIS EVENING.

IN THE DEEP TROPICS FAR SOUTH OF THE MAIN HAWAIIAN ISLANDS...THE
CENTRAL PACIFIC HURRICANE CENTER IS MONITORING A WEAK SURFACE LOW
EMBEDDED WITHIN A SURFACE TROUGH ABOUT 720 MILES SOUTH SOUTHEAST OF
SOUTH POINT ON THE BIG ISLAND OF HAWAII. THIS SYSTEM...WHICH HAS
BEEN MOVING WESTWARD AT 10 TO 15 MPH DURING THE PAST 6 HOURS...HAD
SCATTERED MODERATE THUNDERSTORMS IN THE AREA FROM 08N TO 11.5N
BETWEEN 152W AND 156W. THE HIGHEST TOPS OF THE CUMULONIMBUS
CLOUDS...WHICH WERE DISPLACED ABOUT 85 MILES WEST OF THE APPARENT
LOW-LEVEL CIRCULATION CENTER...WERE ESTIMATED TO BE ABOUT 49
THOUSAND FEET.

ELSEWHERE...THE NATIONAL HURRICANE CENTER /NHC/ IN MIAMI...FLORIDA
IS ISSUING ADVISORIES ON TROPICAL STORM GENEVIEVE...LOCATED ABOUT
1380 MILES EAST SOUTHEAST OF HILO. BASED ON THE LATEST FORECAST...
GENEVIEVE IS EXPECTED TO CROSS LONGITUDE 140W INTO THE NORTH CENTRAL
PACIFIC OCEAN LATE SATURDAY NIGHT OR EARLY SUNDAY MORNING. FOR
ADDITIONAL INFORMATION ON GENEVIEVE...SEE PUBLIC ADVISORIES ISSUED
BY NHC UNDER WMO HEADER WTPZ32 KNHC AND UNDER AWIPS HEADER MIATCPEP2.

$$

HOUSTON






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