Satellite Interpretation Message
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10
000
ATHW40 PHFO 070035
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC SUN FEB 07 2016

BASED ON DATA THROUGH 0000 UTC FEBRUARY 07 2016

LATEST REGIONAL SATELLITE IMAGES SHOW A PAIR OF NORTHEAST TO
SOUTHWEST ORIENTED BANDS OF BROKEN TO OVERCAST LOW AND MIDDLE
CLOUDS. ONE OF THE BANDS STRETCHES OVER MAUI COUNTY AND
OAHU...WHILE THE OTHER IS LOCATED ABOUT 75 TO 225 MILES NORTHWEST
OF KAUAI. THIS BAND IS MOVING SOUTHEAST AT ABOUT 15 TO 20 MPH...
WHILE THE BAND OVER THE MIDDLE OF THE ISLAND CHAIN HAS SLID SLOWLY
EAST SINCE THIS MORNING. BOTH OF THESE BANDS EXTEND WELL NORTHEAST
OF THE ISLANDS...WHERE THEY MERGE INTO ONE SOLID BAND NORTH OF
30N. INFRARED IMAGERY SHOWS RELATIVELY WARM CLOUD TOPS NEAR THE
ISLANDS WITHIN BOTH OF THESE BANDS...INDICATING THAT THE MOISTURE
IS PRETTY SHALLOW...ESTIMATED TO EXTEND AS HIGH AS 10 THOUSAND
FEET BASED ON CLOUD TOP TEMPERATURES NEAR 5 DEGREES C.

SKIES OVER KAUAI REMAIN MOSTLY SUNNY THIS AFTERNOON...BUT LOW
CLOUD COVER HAS INCREASED OVER VIRTUALLY ALL OF THE LOWER SLOPES
ON THE BIG ISLAND. ONE EXCEPTION ON THE BIG ISLAND IS THE EASTERN
PORTION OF THE ISLAND...INCLUDING HILO...PAHOA AND PARADISE
PARK...WHERE SKIES ARE MOSTLY SUNNY. THE PERSISTENT CLOUD BAND
OVER AND NEAR OAHU CONTINUES TO SUPPORT CLOUDY SKIES OVER
OAHU...WITH SKIES MUCH MORE CLOUDY OVER MAUI AS COMPARED TO THIS
MORNING. THUS ALL OF MAUI COUNTY AND MOST OF OAHU ARE UNDER CLOUDY
SKIES WITH BROKEN TO OVERCAST LOW CLOUDS. THIS BAND APPEARS TO BE
DEVELOPING IN RESPONSE TO INCREASED LOW-LEVEL CONVERGENCE IN THE
AREA...DUE TO THE APPROACH OF A COLD FRONT...WHICH IS MARKED BY
THE BAND NORTHWEST OF KAUAI. THIS BAND ARCS ACROSS THE ENTIRE
CENTRAL NORTH PACIFIC...AND THE LEADING EDGE LIES ALONG A LINE
THROUGH 30N 151W TO 25N 156W TO 75 MILES NORTHWEST OF KAUAI TO 20N
166W TO 17N 180. LOW CLOUDS NEAR THE BIG ISLAND CONTINUE TO MOVE
GENERALLY TOWARD THE WEST AND NORTHWEST WITHIN A WEAKENING TRADE
WIND FLOW...WHILE LOW CLOUDS NEAR KAUAI ARE MOVING TOWARD THE
SOUTHEAST AT 15 TO 20 MPH. THIS HIGHLIGHTS THE LOW-LEVEL
CONVERGENCE THAT HELPING TO MAINTAIN THE CLOUD BAND OVER MAUI
COUNTY AND OAHU...AND ALSO INDICATES THAT NORTHWEST WINDS ARE NOW
BLOWING THROUGH THE FRONT TO THE NORTHWEST...WHERE LOW LEVEL
CONVERGENCE IS BEGINNING TO WEAKEN.

NORTHWEST OF THE COLD FRONT CLOUD BAND...SKY COVER IS DOMINATED
BY BROKEN TO OVERCAST SHALLOW CUMULUS /CU/ AND STRATOCUMULUS /SC/
CLOUDS THAT ARE STREAMING SOUTH- AND SOUTHEAST-WARD OVER THE
PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT. THE REMAINDER OF THE
TROPICAL CENTRAL NORTH PACIFIC...FROM 10N TO 30N BETWEEN 140W AND
THE DATE LINE...IS DOMINATED BY SCATTERED TO LOCALLY BROKEN CU AND
SC THAT LACK SIGNIFICANT ORGANIZATION.

WATER VAPOR IMAGERY SHOWS THAT A PERSISTENT RIDGE OF HIGH PRESSURE
IN THE MID AND UPPER LEVELS OF THE ATMOSPHERE CONTINUES TO
PREVAIL SOUTH AND SOUTHWEST OF THE ISLANDS...BUT ALSO SHOWS THAT
IT HAS BEEN SUPPRESSED SOUTHWARD FROM WHERE IT WAS EARLIER IN THE
WEEK. DRIEST AIR ALOFT HAS SHIFTED SOUTH OF THE ISLANDS...MAINLY
FROM 10N TO 17N BETWEEN 144W AND 167W. THIS APPEARS TO HAVE
OCCURRED IN RESPONSE TO A SOUTHWARD DIP IN THE JET STREAM TO THE
NORTH OF THE ISLANDS...WITH A TROUGH ALOFT SUPPORTING THE SURFACE
FRONT DESCRIBED ABOVE. ALTHOUGH THIS TROUGH IS NOT VERY SHARP
SOUTH OF 30N...IT LIES ALONG A LINE FROM 30N 151W TO 25N 154W TO
OVER THE MAIN HAWAIIAN ISLANDS...AND IS MOVING RAPIDLY EAST
ACROSS THE AREA AT SPEEDS BETWEEN 60 AND 70 MPH.

$$

BIRCHARD


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.