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000
ATHW40 PHFO 270538
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC MON APR 27 2015

BASED ON DATA THROUGH 0500 UTC APRIL 27 2015

A 180 TO 240 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 40N140W TO 33N144W TO 25N151W. THIS FEATURE CONTINUES
SOUTHWESTWARD AS A 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS WEST OF A LINE FROM 25N151W TO 20N158W TO 15N166W. THE BAND
OF LOW CLOUDS...MARKING A WEAKENING FRONTAL BOUNDARY...LIES ACROSS
THE MAIN HAWAIIAN ISLANDS FROM THE KAUAI CHANNEL TO MAUI. THE CLOUD
BAND IS MOVING TOWARD THE EAST AT 10 TO 15 MPH NORTH OF 30N...BUT
GRADUALLY BECOMES STATIONARY JUST SOUTHWEST OF THE HAWAIIAN ISLANDS.

SATELLITE LOOP SHOWS THAT BROAD ANTICYCLONIC CIRCULATIONS GOVERN LOW
LEVEL FLOW ON BOTH SIDES OF THE FRONTAL BOUNDARY. THESE
CIRCULATIONS...ACTUALLY SUBTROPICAL HIGHS...ARE CENTERED NEAR
35N130W AND 38N172W. THE FRONTAL BOUNDARY DIVIDES TWO FLOW REGIMES
ACROSS THE ISLANDS...WITH SOUTHEASTERLIES ACROSS MAUI AND THE BIG
ISLAND CONTRASTING WITH NORTHERLIES ACROSS KAUAI.

ALL OF THE MAIN HAWAIIAN ISLANDS EXCEPT KAUAI ARE COVERED BY BROKEN
TO OVERCAST LOW CLOUDS...WITH OAHU...MOLOKAI...LANAI AND MAUI
DIRECTLY AFFECTED BY THE FRONTAL CLOUD BAND. AFTERNOON HEATING
TRIGGERED THE LINGERING BROKEN TO OVERCAST LOW CLOUDS ACROSS THE BIG
ISLAND. NORTHERLY FLOW KEEPS A PALL OF BROKEN STABLE LOW CLOUDS
ACROSS THE NORTHERN HALF OF KAUAI.

$$

POWELL











000
ATHW40 PHFO 270538
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC MON APR 27 2015

BASED ON DATA THROUGH 0500 UTC APRIL 27 2015

A 180 TO 240 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 40N140W TO 33N144W TO 25N151W. THIS FEATURE CONTINUES
SOUTHWESTWARD AS A 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS WEST OF A LINE FROM 25N151W TO 20N158W TO 15N166W. THE BAND
OF LOW CLOUDS...MARKING A WEAKENING FRONTAL BOUNDARY...LIES ACROSS
THE MAIN HAWAIIAN ISLANDS FROM THE KAUAI CHANNEL TO MAUI. THE CLOUD
BAND IS MOVING TOWARD THE EAST AT 10 TO 15 MPH NORTH OF 30N...BUT
GRADUALLY BECOMES STATIONARY JUST SOUTHWEST OF THE HAWAIIAN ISLANDS.

SATELLITE LOOP SHOWS THAT BROAD ANTICYCLONIC CIRCULATIONS GOVERN LOW
LEVEL FLOW ON BOTH SIDES OF THE FRONTAL BOUNDARY. THESE
CIRCULATIONS...ACTUALLY SUBTROPICAL HIGHS...ARE CENTERED NEAR
35N130W AND 38N172W. THE FRONTAL BOUNDARY DIVIDES TWO FLOW REGIMES
ACROSS THE ISLANDS...WITH SOUTHEASTERLIES ACROSS MAUI AND THE BIG
ISLAND CONTRASTING WITH NORTHERLIES ACROSS KAUAI.

ALL OF THE MAIN HAWAIIAN ISLANDS EXCEPT KAUAI ARE COVERED BY BROKEN
TO OVERCAST LOW CLOUDS...WITH OAHU...MOLOKAI...LANAI AND MAUI
DIRECTLY AFFECTED BY THE FRONTAL CLOUD BAND. AFTERNOON HEATING
TRIGGERED THE LINGERING BROKEN TO OVERCAST LOW CLOUDS ACROSS THE BIG
ISLAND. NORTHERLY FLOW KEEPS A PALL OF BROKEN STABLE LOW CLOUDS
ACROSS THE NORTHERN HALF OF KAUAI.

$$

POWELL










000
ATHW40 PHFO 270538
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC MON APR 27 2015

BASED ON DATA THROUGH 0500 UTC APRIL 27 2015

A 180 TO 240 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 40N140W TO 33N144W TO 25N151W. THIS FEATURE CONTINUES
SOUTHWESTWARD AS A 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS WEST OF A LINE FROM 25N151W TO 20N158W TO 15N166W. THE BAND
OF LOW CLOUDS...MARKING A WEAKENING FRONTAL BOUNDARY...LIES ACROSS
THE MAIN HAWAIIAN ISLANDS FROM THE KAUAI CHANNEL TO MAUI. THE CLOUD
BAND IS MOVING TOWARD THE EAST AT 10 TO 15 MPH NORTH OF 30N...BUT
GRADUALLY BECOMES STATIONARY JUST SOUTHWEST OF THE HAWAIIAN ISLANDS.

SATELLITE LOOP SHOWS THAT BROAD ANTICYCLONIC CIRCULATIONS GOVERN LOW
LEVEL FLOW ON BOTH SIDES OF THE FRONTAL BOUNDARY. THESE
CIRCULATIONS...ACTUALLY SUBTROPICAL HIGHS...ARE CENTERED NEAR
35N130W AND 38N172W. THE FRONTAL BOUNDARY DIVIDES TWO FLOW REGIMES
ACROSS THE ISLANDS...WITH SOUTHEASTERLIES ACROSS MAUI AND THE BIG
ISLAND CONTRASTING WITH NORTHERLIES ACROSS KAUAI.

ALL OF THE MAIN HAWAIIAN ISLANDS EXCEPT KAUAI ARE COVERED BY BROKEN
TO OVERCAST LOW CLOUDS...WITH OAHU...MOLOKAI...LANAI AND MAUI
DIRECTLY AFFECTED BY THE FRONTAL CLOUD BAND. AFTERNOON HEATING
TRIGGERED THE LINGERING BROKEN TO OVERCAST LOW CLOUDS ACROSS THE BIG
ISLAND. NORTHERLY FLOW KEEPS A PALL OF BROKEN STABLE LOW CLOUDS
ACROSS THE NORTHERN HALF OF KAUAI.

$$

POWELL










000
ATHW40 PHFO 270538
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC MON APR 27 2015

BASED ON DATA THROUGH 0500 UTC APRIL 27 2015

A 180 TO 240 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 40N140W TO 33N144W TO 25N151W. THIS FEATURE CONTINUES
SOUTHWESTWARD AS A 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS WEST OF A LINE FROM 25N151W TO 20N158W TO 15N166W. THE BAND
OF LOW CLOUDS...MARKING A WEAKENING FRONTAL BOUNDARY...LIES ACROSS
THE MAIN HAWAIIAN ISLANDS FROM THE KAUAI CHANNEL TO MAUI. THE CLOUD
BAND IS MOVING TOWARD THE EAST AT 10 TO 15 MPH NORTH OF 30N...BUT
GRADUALLY BECOMES STATIONARY JUST SOUTHWEST OF THE HAWAIIAN ISLANDS.

SATELLITE LOOP SHOWS THAT BROAD ANTICYCLONIC CIRCULATIONS GOVERN LOW
LEVEL FLOW ON BOTH SIDES OF THE FRONTAL BOUNDARY. THESE
CIRCULATIONS...ACTUALLY SUBTROPICAL HIGHS...ARE CENTERED NEAR
35N130W AND 38N172W. THE FRONTAL BOUNDARY DIVIDES TWO FLOW REGIMES
ACROSS THE ISLANDS...WITH SOUTHEASTERLIES ACROSS MAUI AND THE BIG
ISLAND CONTRASTING WITH NORTHERLIES ACROSS KAUAI.

ALL OF THE MAIN HAWAIIAN ISLANDS EXCEPT KAUAI ARE COVERED BY BROKEN
TO OVERCAST LOW CLOUDS...WITH OAHU...MOLOKAI...LANAI AND MAUI
DIRECTLY AFFECTED BY THE FRONTAL CLOUD BAND. AFTERNOON HEATING
TRIGGERED THE LINGERING BROKEN TO OVERCAST LOW CLOUDS ACROSS THE BIG
ISLAND. NORTHERLY FLOW KEEPS A PALL OF BROKEN STABLE LOW CLOUDS
ACROSS THE NORTHERN HALF OF KAUAI.

$$

POWELL











000
ATHW40 PHFO 270030
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC MON APR 27 2015

BASED ON DATA THROUGH 0000 UTC APRIL 27 2015

AN UPPER LEVEL TROUGH REMAINS NORTH OF THE ISLANDS THIS AFTERNOON.
WATER VAPOR SHOWS THE TROUGH AXIS EXTENDS FROM 42.5N 151.7W TO 24.4N
160.8W...PLACING THE SOUTHERN PART OF THE TROUGH AXIS ABOUT 170
MILES NORTH NORTHWEST OF KAUAI AT 2 PM.

THE SURFACE FEATURE ASSOCIATED WITH THE UPPER LEVEL SYSTEM HAS MOVED
LITTLE SINCE DAYBREAK. THE LEADING EDGE OF A CLOUD BAND ASSOCIATED
WITH A SURFACE FRONT IS FROM 36.0N 143.9W TO 26.0N 150.6W TO 15.9N
164.8W. THE LEADING EDGE OF THE BAND IS OVER OAHU AT 2 PM...AND THE
BACK END IS JUST MOVING TO THE EAST OF KAUAI. LOW CLOUDS ARE
LINGERING OVER KAUAI THIS AFTERNOON...BUT ARE STARTING TO BREAK UP
OVER THE WESTERN SIDE OF THE ISLAND. THE CLOUD BAND COMBINED WITH
EARLIER CLOUDS OVER OAHU CONTINUE TO BRING MOSTLY CLOUDY SKIES TO
THE ISLAND THIS AFTERNOON.

CLOUDS HAVE INCREASED OVER THE ISLANDS OF MAUI COUNTY AND THE BIG
ISLAND SINCE DAYBREAK. AS OF 2 PM...THE WESTERN SIDE OF MOLOKAI AND
LANAI HAVE THE FEWEST CLOUDS OVERHEAD...WITH CLOUDS PLENTIFUL OVER
THE EASTERN HALF OF THESE ISLANDS. CLOUDS HAVE FORMED OVER MAUI OVER
THE LAST SIX HOURS AND COVER JUST ABOUT THE ENTIRE ISLAND AT 2 PM.
SIMILARLY...CLOUDS HAVE FORMED OVER THE BIG ISLAND...AND COVER MOST
OF THE SLOPES...EXTENDING UP TO AROUND 8000 FEET THIS AFTERNOON.

$$

M BALLARD






000
ATHW40 PHFO 261825
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC SUN APR 26 2015

BASED ON DATA THROUGH 1800 UTC APRIL 26 2015

WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL TROUGH AXIS NORTH OF THE
MAIN HAWAIIAN ISLANDS THIS MORNING. THE TROUGH AXIS LIES ALONG A
LINE FROM 42.5N 154.6W TO 25.6N 161.5W...PLACING THE SOUTHERN END
ABOUT 270 MILES NORTH NORTHWEST OF KAUAI. A SURFACE FRONT ASSOCIATED
WITH THIS UPPER LEVEL SYSTEM IS SLOWLY MOVING ACROSS THE ISLANDS
THIS MORNING.

THE LEADING EDGE OF THE CLOUD BAND ASSOCIATED WITH THE FRONT IS
ALONG A LINE FROM 36.5N 145.5W TO 25.9N 152.0W TO 19.3N 160.6W.
NORTH OF 30N CLOUD TOPS ARE REACHING NEAR 40000 FEET. NEAR THE
ISLANDS...THE BAND IS ABOUT 125 MILES WIDE WITH TOPS NEAR 16000
FEET.

AS OF 8 AM...THE LEADING END OF THE CLOUD BAND IS APPROACHING THE
NORTH SHORE OF OAHU...WITH THE BACK END AT THE WESTERN END OF KAUAI.
ADDITIONAL LOW CLOUDS ARE FOUND OVER MOST OF OAHU THIS MORNING. A
NORTH TO SOUTH ORIENTED LINE OF CLOUDS IS OVER WESTERN MOLOKAI AND
MOVING TO THE EAST. THE SOUTHERN EDGE OF THIS LINE IS APPROACHING
THE WESTERN COAST OF LANAI AT 8 AM. VISIBLE SATELLITE IMAGERY SHOWS
CLEAR SKIES OVER ALL OF MAUI THIS MORNING.

MOST OF THE BIG ISLAND IS ALSO CLOUD FREE AT 8 AM. THE CLOUDS OVER
THE BIG ISLAND ARE CONFINED TO THE SOUTHEAST SIDE OF THE ISLANDS
FROM HILO TO CAPE KUMUKAHI TO SOUTH POINT POINT...EXTENDING UP THE
SLOPES TO AROUND 4000 FEET.

$$

M BALLARD







000
ATHW40 PHFO 261825
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC SUN APR 26 2015

BASED ON DATA THROUGH 1800 UTC APRIL 26 2015

WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL TROUGH AXIS NORTH OF THE
MAIN HAWAIIAN ISLANDS THIS MORNING. THE TROUGH AXIS LIES ALONG A
LINE FROM 42.5N 154.6W TO 25.6N 161.5W...PLACING THE SOUTHERN END
ABOUT 270 MILES NORTH NORTHWEST OF KAUAI. A SURFACE FRONT ASSOCIATED
WITH THIS UPPER LEVEL SYSTEM IS SLOWLY MOVING ACROSS THE ISLANDS
THIS MORNING.

THE LEADING EDGE OF THE CLOUD BAND ASSOCIATED WITH THE FRONT IS
ALONG A LINE FROM 36.5N 145.5W TO 25.9N 152.0W TO 19.3N 160.6W.
NORTH OF 30N CLOUD TOPS ARE REACHING NEAR 40000 FEET. NEAR THE
ISLANDS...THE BAND IS ABOUT 125 MILES WIDE WITH TOPS NEAR 16000
FEET.

AS OF 8 AM...THE LEADING END OF THE CLOUD BAND IS APPROACHING THE
NORTH SHORE OF OAHU...WITH THE BACK END AT THE WESTERN END OF KAUAI.
ADDITIONAL LOW CLOUDS ARE FOUND OVER MOST OF OAHU THIS MORNING. A
NORTH TO SOUTH ORIENTED LINE OF CLOUDS IS OVER WESTERN MOLOKAI AND
MOVING TO THE EAST. THE SOUTHERN EDGE OF THIS LINE IS APPROACHING
THE WESTERN COAST OF LANAI AT 8 AM. VISIBLE SATELLITE IMAGERY SHOWS
CLEAR SKIES OVER ALL OF MAUI THIS MORNING.

MOST OF THE BIG ISLAND IS ALSO CLOUD FREE AT 8 AM. THE CLOUDS OVER
THE BIG ISLAND ARE CONFINED TO THE SOUTHEAST SIDE OF THE ISLANDS
FROM HILO TO CAPE KUMUKAHI TO SOUTH POINT POINT...EXTENDING UP THE
SLOPES TO AROUND 4000 FEET.

$$

M BALLARD






000
ATHW40 PHFO 261230
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC SUN APR 26 2015

BASED ON DATA THROUGH 1200 UTC APRIL 26 2015

OVERCAST LAYERED CLOUDS COVER THE CENTRAL NORTH PACIFIC WITHIN AN
AREA BOUNDED BY 41N144W 28N153W 33N160W 40N157W 41N144W. A DEEP LOW
NEAR 31N158W LIES ALONG THE SOUTHERN EDGE OF THESE LAYERED CLOUDS
AND APPEARS TO BE MOVING TOWARD THE NORTHEAST AT ABOUT 15 MPH. A
RAGGED 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW CLOUDS EXTENDS
SOUTH FROM THE LAYERED CLOUDS...MAINLY WEST OF A LINE FROM 28N153W
TO 24N155W TO 19N160W TO 17N164W. MARKING A FRONTAL BOUNDARY MOVING
EASTWARD SLOWLY...THE LEADING EDGE OF THESE LOW CLOUDS LIES ACROSS
THE KAUAI CHANNEL WITHIN THE MAIN HAWAIIAN ISLAND CHAIN. THE WESTERN
PORTION OF THE FRONTAL CLOUD BAND COVERS KAUAI.

A BROAD ANTICYCLONIC CIRCULATION GOVERNS LOW CLOUD MOTION EAST OF
THE LAYERED CLOUDS AND FRONTAL CLOUD BAND. CENTERED NEAR
30N135W...THIS CIRCULATION...ACTUALLY A SUBTROPICAL HIGH...HAS NOT
MOVED MUCH OVER THE PAST FEW DAYS. SINCE THIS FEATURE IS FAR
NORTHEAST OF THE MAIN HAWAIIAN ISLANDS...LOW LEVEL FLOW IS FROM THE
SOUTHEAST ACROSS THE ISLANDS EAST OF THE FRONTAL BOUNDARY. LOW LEVEL
FLOW IS FROM THE SOUTHWEST TO WEST ALONG AND BEHIND THE FRONTAL
BOUNDARY.

EAST OF THE FRONTAL CLOUD BAND...LOW CLOUD COVER HAS DECREASED
DRAMATICALLY OVERNIGHT...ESPECIALLY ACROSS MAUI AND THE BIG ISLAND.
MAUI IS CLEAR AND THE BIG ISLAND HAS BROKEN LOW CLOUDS ONLY ALONG
THE KAU AND SOUTHEAST PUNA SHORELINES. THE REST OF THE BIG ISLAND
HAS SCATTERED LOW CLOUDS TO CLEAR SKIES. LANAI AND MOLOKAI ALSO
APPEAR TO HAVE SCATTERED LOW CLOUDS TO CLEAR SKIES. OAHU HAS
SCATTERED LOW CLOUDS...BUT THIS WILL CHANGE SOON AS THE FRONTAL
CLOUD BAND ACROSS THE KAUAI CHANNEL ARRIVES.

$$
POWELL








000
ATHW40 PHFO 261230
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC SUN APR 26 2015

BASED ON DATA THROUGH 1200 UTC APRIL 26 2015

OVERCAST LAYERED CLOUDS COVER THE CENTRAL NORTH PACIFIC WITHIN AN
AREA BOUNDED BY 41N144W 28N153W 33N160W 40N157W 41N144W. A DEEP LOW
NEAR 31N158W LIES ALONG THE SOUTHERN EDGE OF THESE LAYERED CLOUDS
AND APPEARS TO BE MOVING TOWARD THE NORTHEAST AT ABOUT 15 MPH. A
RAGGED 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW CLOUDS EXTENDS
SOUTH FROM THE LAYERED CLOUDS...MAINLY WEST OF A LINE FROM 28N153W
TO 24N155W TO 19N160W TO 17N164W. MARKING A FRONTAL BOUNDARY MOVING
EASTWARD SLOWLY...THE LEADING EDGE OF THESE LOW CLOUDS LIES ACROSS
THE KAUAI CHANNEL WITHIN THE MAIN HAWAIIAN ISLAND CHAIN. THE WESTERN
PORTION OF THE FRONTAL CLOUD BAND COVERS KAUAI.

A BROAD ANTICYCLONIC CIRCULATION GOVERNS LOW CLOUD MOTION EAST OF
THE LAYERED CLOUDS AND FRONTAL CLOUD BAND. CENTERED NEAR
30N135W...THIS CIRCULATION...ACTUALLY A SUBTROPICAL HIGH...HAS NOT
MOVED MUCH OVER THE PAST FEW DAYS. SINCE THIS FEATURE IS FAR
NORTHEAST OF THE MAIN HAWAIIAN ISLANDS...LOW LEVEL FLOW IS FROM THE
SOUTHEAST ACROSS THE ISLANDS EAST OF THE FRONTAL BOUNDARY. LOW LEVEL
FLOW IS FROM THE SOUTHWEST TO WEST ALONG AND BEHIND THE FRONTAL
BOUNDARY.

EAST OF THE FRONTAL CLOUD BAND...LOW CLOUD COVER HAS DECREASED
DRAMATICALLY OVERNIGHT...ESPECIALLY ACROSS MAUI AND THE BIG ISLAND.
MAUI IS CLEAR AND THE BIG ISLAND HAS BROKEN LOW CLOUDS ONLY ALONG
THE KAU AND SOUTHEAST PUNA SHORELINES. THE REST OF THE BIG ISLAND
HAS SCATTERED LOW CLOUDS TO CLEAR SKIES. LANAI AND MOLOKAI ALSO
APPEAR TO HAVE SCATTERED LOW CLOUDS TO CLEAR SKIES. OAHU HAS
SCATTERED LOW CLOUDS...BUT THIS WILL CHANGE SOON AS THE FRONTAL
CLOUD BAND ACROSS THE KAUAI CHANNEL ARRIVES.

$$
POWELL









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