High Surf Warning 2, NWS Guam

757 
WHMY40 PGUM 081136
CFWMY

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
936 PM CHST WED JUL 8 2015

SWELL GENERATED BY TYPHOON NANGKA AND DISTANT TYPHOON CHAN-HOM
WILL PRODUCE HAZARDOUS SURF AT LEAST THROUGH THROUGH FRIDAY.
DANGEROUS SURF WILL DEVELOP ON NORTH AND EAST FACING EXPOSURES OF
SAIPAN AND TINIAN EARLY THURSDAY MORNING AS TYPHOON NANGKA MOVES
CLOSER TO THE NORTHERN MARIANAS.

GUZ003-004-082100-
/O.CAN.PGUM.SU.Y.0026.000000T0000Z-150708T1800Z/
/O.EXT.PGUM.SU.W.0002.150709T1100Z-150709T2000Z/
/O.CON.PGUM.SU.Y.0027.150709T2000Z-150710T0800Z/
TINIAN-SAIPAN-
936 PM CHST WED JUL 8 2015

...HIGH SURF ADVISORY IS SUSPENDED...

THE NATIONAL WEATHER SERVICE IN TIYAN HAS SUSPENDED THE HIGH SURF
ADVISORY.

THE HIGH SURF ADVISORY IS SUSPENDED WHILE TINIAN AND SAIPAN ARE IN
A TROPICAL STORM WARNING.

&&

$$

GUZ001-002-082100-
/O.CON.PGUM.SU.Y.0026.000000T0000Z-150710T0800Z/
GUAM-ROTA-
936 PM CHST WED JUL 8 2015

..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM CHST FRIDAY...

* EXPECT HAZARDOUS SURF TO BUILD BETWEEN 9 AND 12 FEET BY THURSDAY
  ALONG NORTH FACING REEFS FOR GUAM AND ROTA. HAZARDOUS SURF OF 9
  TO 12 FEET COULD DEVELOP ALONG THE EAST FACING REEFS ON
  THURSDAY. SURF WILL FALL BELOW HAZARDOUS LEVELS ALONG SOUTH
  FACING REEFS ON THURSDAY...BUT REMAIN HAZARDOUS ALONG WEST
  FACING REEFS. SURF WILL GRADUALLY FALL BEGINNING EARLY FRIDAY AS
  TYPHOON NANGKA BEGINS TO MOVE AWAY FROM THE MARIANAS. HOWEVER...
  HAZARDOUS SURF WILL PERSIST AT LEAST THROUGH FRIDAY AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AVOID VENTURING NEAR EXPOSED REEFS AND BEACHES...ESPECIALLY THOSE
FACING SOUTH...WEST AND NORTH...AS RIP CURRENTS WILL BE LIFE
THREATENING.

&&

$$

ZIOBRO

308 
WHMY40 PGUM 081943
CFWMY

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
543 AM CHST THU JUL 9 2015

SWELL GENERATED BY TYPHOON NANGKA AND DISTANT TYPHOON CHAN-HOM
WILL PRODUCE HAZARDOUS SURF AT LEAST THROUGH THROUGH SATURDAY.
THE PASSAGE OF TYPHOON NANGKA NORTH OF SAIPAN WILL BRING DANGEROUS
SURF TO TINIAN AND SAIPAN TODAY AND TONIGHT.

GUZ003-004-082045-
/O.CAN.PGUM.SU.W.0002.150709T1100Z-150709T2000Z/
/O.CAN.PGUM.SU.Y.0027.150709T2000Z-150710T0800Z/
TINIAN-SAIPAN-
543 AM CHST THU JUL 9 2015

...HIGH SURF WARNING IS SUSPENDED...
...HIGH SURF ADVISORY IS SUSPENDED...

HIGH SURF WARNINGS AND ADVISORIES ARE CANCELLED WHILE A TROPICAL
STORM WARNING IS IN EFFECT. THEY WILL BE RE-ISSUED AS NECESSARY
WHEN THE TROPICAL STORM WARNING ENDS.

$$

GUZ001-002-090345-
/O.CON.PGUM.SU.Y.0026.000000T0000Z-150710T0800Z/
GUAM-ROTA-
543 AM CHST THU JUL 9 2015

...HIGH SURF ADVISORY REMAINS IN EFFECT FOR NORTH AND WEST FACING
REEFS UNTIL 6 PM CHST FRIDAY...

* EXPECT HAZARDOUS SURF AT 7 TO 10 FEET ALONG NORTH AND WEST
  FACING REEFS TODAY THROUGH AT LEAST SATURDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AVOID VENTURING NEAR EXPOSED REEFS AND BEACHES...ESPECIALLY THOSE
FACING WEST AND NORTH...AS RIP CURRENTS WILL BE LIFE THREATENING.

&&

$$

MIDDLEBROOKE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
414 PM CHST WED JUL 8 2015

.SYNOPSIS...
TYPHOON NANGKA IS A SEVERE THREAT TO THE NORTHERN MARIANA ISLANDS
AND IS ABOUT 250 MILES EAST OF SAIPAN. TYPHOON CHAN-HOM IS ALMOST
1000 MILES WEST-NORTHWEST OF GUAM AND MOVING AWAY. RADAR SHOWS A
FEW THUNDERSTORMS ALREADY APPROACHING THE FORECAST ZONES. VAD
WINDS ARE NORTHWEST AT 10 TO 15 KT...BUT SURFACE WINDS ARE ALREADY
GUSTY AT SAIPAN. SAIPAN/TANAPAG BUOY SHOWS COMBINED SEAS OF 9 TO
10 FEET FROM WNW AND NE.

&&

.DISCUSSION...
TYPHOON NANGKA WILL BE OUR MAIN FORECAST PROBLEM DURING THE NEXT
COUPLE OF DAYS. NANGKA HAS BEEN TAKING A MORE WESTERLY TRACK TODAY
AND MAJOR CHANGES WERE MADE TO THE FORECAST...ESPECIALLY FOR
SAIPAN AND TINIAN. SHOWERY WEATHER AND GUSTY WINDS WILL MOVE INTO
THE MARIANAS QUICKLY THIS EVENING THROUGH OVERNIGHT. CONDITIONS
WILL DETERIORATE QUICKLY ACROSS THE FORECAST ZONES. IF NANGKA DOES
NOT START MOVING MORE TOWARD THE WEST-NORTHWEST SOON...THEN MORE
SIGNIFICANT UPDATES WILL BE NEEDED. LONGER TERM...MUCH BETTER
WEATHER IS EXPECTED ACROSS THE REGION NEXT WEEK.

&&

.MARINE...
THE MARINE GRIDS WERE REVISED TO ACCOUNT FOR A CLOSER APPROACH OF
TYPHOON NANGKA. MARINE WEATHER CONDITIONS WILL DETERIORATE QUICKLY
ACROSS THE AREA THIS EVENING. COMPLEX MARINE CONDITIONS WILL
PERSIST DURING THE COMING DAYS WITH A VERY SHARP GRADIENT FROM
NORTHEAST TO SOUTHWEST SINCE MUCH HIGHER WINDS AND LARGER WAVES
WILL AFFECT THE NORTHERN MARINE ZONES NEAR SAIPAN AND TINIAN.
WINDS AND WAVES WILL GRADUALLY SETTLE DOWN OVER THE WEEKEND WITH
MUCH BETTER MARINE WEATHER BY NEXT WEEK.

&&

.TROPICAL SYSTEMS...
TYPHOON NANGKA IS ABOUT 250 EAST OF SAIPAN AND HAS SLOWED AND
SHIFTED SLIGHTLY TOWARD THE WEST TODAY. A TYPHOON WARNING WAS
ISSUED THIS MORNING FOR ALAMAGAN...PAGAN AND AGRIHAN WHILE A
TYPHOON WATCH WAS ISSUED AT NOON FOR SAIPAN AND TINIAN.
ALSO...TYPHOON CHAN-HOM IS ABOUT 1000 MILES WEST-NORTHWEST OF
GUAM. MOST MODELS ARE IN DECENT AGREEMENT AND INDICATE THAT BOTH
CHAN-HOM AND NANGKA SHOULD MOVE TOWARD THE WEST-NORTHWEST ROUGHLY
IN TANDEM. ANY DEVIATION IN THE ACTUAL TRACK OF NANGKA WILL MAKE
A BIG DIFFERENCE IN ITS AFFECTS ON THE MARIANAS AND IT WILL NEED
TO BE WATCHED CLOSELY HOUR-BY-HOUR.

&&

.EASTERN MICRONESIA...
TYPHOON NANGKA IS MOVING AWAY FROM EASTERN MICRONESIA TOWARD THE
MARIANA ISLANDS LEAVING A PATTERN OF WEAK RIDGING IN ITS WAKE
ACROSS CHUUK...POHNPEI AND KOSRAE. ASCAT WINDS ANALYSIS AND
SATELLITE SHOW FRAGMENTS OF THE MONSOON TROUGH AND A FEW SHOWERS
REMAIN ACROSS THE MARSHALL ISLANDS. MOST MODELS INDICATE THAT THE
MONSOON TROUGH WILL EVENTUALLY BECOME RE-ESTABLISHED BY NEXT WEEK
BETWEEN 7N AND 9N SO THAT SOUTHWEST TO WEST MONSOON WINDS WILL
LIKELY RETURN ACROSS THE FORECAST AREA.

&&

.WESTERN MICRONESIA...
THE CHUUK DISCUSSION IS INCLUDED WITH EASTERN MICRONESIA BECAUSE OF
SIMILAR SYNOPTIC CONDITIONS.

TYPHOONS AND THE MONSOON TROUGH WILL REMAIN WELL NORTH OF KOROR
AND YAP IN THE COMING DAYS. FAIRLY DRY WEATHER AND LIGHT SOUTHWEST
TO SOUTH WINDS ARE EXPECTED TO CONTINUE THROUGH THE WEEKEND.

SURF ADVISORIES ARE NO LONGER IN EFFECT FOR YAP AND KOROR. WW3
MODEL GUIDANCE INDICATES SWELL WAVES HAVE SUBSIDED AND WILL REMAIN
BELOW HAZARDOUS LEVELS...BUT SURF WILL NEED TO BE MONITORED IN
CASE SOME LARGER NORTH SWELL ARRIVES FROM TYPHOON CHAN-HOM OVER
THE WEEKEND.

&&

.GUM WATCHES/WARNINGS/ADVISORIES...
GU...HIGH SURF ADVISORY UNTIL 6 PM CHST FRIDAY FOR GUZ001-002.

     TYPHOON WATCH FOR GUZ003-004.

     HIGH SURF ADVISORY UNTIL 4 AM CHST THURSDAY FOR GUZ003-004.

     HIGH SURF ADVISORY FROM 6 AM TO 6 PM CHST FRIDAY FOR GUZ003-004.

     HIGH SURF WARNING FROM 4 AM THURSDAY TO 6 AM CHST FRIDAY FOR
     GUZ003-004.

MARIANAS WATERS...TYPHOON WATCH FOR PMZ153-154.

     SMALL CRAFT ADVISORY UNTIL 6 PM CHST FRIDAY FOR PMZ151>154.

&&

SIMPSON/M. AYDLETT