Guam County, Guam
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The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.
Weather Alerts: Guam County, Guam
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High Surf Advisory
GUZ001-002-220800-
/O.UPG.PGUM.SU.Y.0003.000000T0000Z-171025T0800Z/
/O.EXA.PGUM.SU.W.0001.000000T0000Z-171023T0800Z/
/O.EXA.PGUM.SU.Y.0004.171023T0800Z-171025T0800Z/
GUAM-ROTA-
346 AM CHST SUN OCT 22 2017

...HIGH SURF WARNING IN EFFECT ALONG WEST FACING REEFS...
...HIGH SURF ADVISORY WILL BE IN EFFECT FROM 6 PM MONDAY TO 6 PM CHST
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A HIGH SURF WARNING
FOR WEST FACING REEFS, WHICH IS IN EFFECT UNTIL 6 PM CHST MONDAY. A
HIGH SURF ADVISORY REMAINS IN EFFECT FOR SOUTH AND NORTH FACING
REEFS.

FOR SOUTH FACING SHORES...HAZARDOUS SURF OF 7 TO 9 FEET COULD FALL
BELOW HAZARDOUS LEVELS TODAY. HOWEVER...TROPICAL DEPRESSION 27W WILL
CAUSE SURF TO RISE AGAIN DEPENDING ON ITS EXACT TRACK THROUGH THE
MARIANAS THE NEXT COUPLE OF DAYS.

FOR WEST FACING REEFS...DANGEROUS SURF OF 13 TO 16 FEET WILL CONTINUE
THROUGH MONDAY BEFORE SUBSIDING SLOWLY MONDAY EVENING AS WEST SWELL
DECREASES AND SHIFTS TO THE NORTHWEST. MINOR COASTAL INUNDATION
AROUND 1 TO 2 FEET IS POSSIBLE AROUND TIMES OF HIGH TIDE. THE NEXT
HIGH TIDES WILL BE AROUND 930 AM THIS MORNING AND 830 PM THIS
EVENING. ALTHOUGH SURF WILL SLOWLY DIMINISH STARTING MONDAY
EVENING...SURF WILL REMAIN HAZARDOUS THROUGH WEDNESDAY.

FOR NORTH FACING REEFS...SURF OF 6 TO 8 FEET WILL SLOWLY RISE
TODAY...AND COULD BECOME HAZARDOUS AT 7 TO 10 FEET THIS AFTERNOON.
SURF MAY INCREASE ANOTHER 1 TO 2 FEET MONDAY BEFORE SLOWLY SUBSIDING
TUESDAY OR WEDNESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A HIGH SURF WARNING INDICATES THAT DANGEROUS...BATTERING WAVES WILL
POUND THE SHORELINE. THIS WILL RESULT IN LIFE-THREATENING CONDITIONS.

A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE
ADVISORY AREA...PRODUCING LOCALIZED BEACH EROSION AND DANGEROUS
SWIMMING CONDITIONS.

&&

$$

High Surf Warning
GUZ001-002-220800-
/O.UPG.PGUM.SU.Y.0003.000000T0000Z-171025T0800Z/
/O.EXA.PGUM.SU.W.0001.000000T0000Z-171023T0800Z/
/O.EXA.PGUM.SU.Y.0004.171023T0800Z-171025T0800Z/
GUAM-ROTA-
346 AM CHST SUN OCT 22 2017

...HIGH SURF WARNING IN EFFECT ALONG WEST FACING REEFS...
...HIGH SURF ADVISORY WILL BE IN EFFECT FROM 6 PM MONDAY TO 6 PM CHST
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A HIGH SURF WARNING
FOR WEST FACING REEFS, WHICH IS IN EFFECT UNTIL 6 PM CHST MONDAY. A
HIGH SURF ADVISORY REMAINS IN EFFECT FOR SOUTH AND NORTH FACING
REEFS.

FOR SOUTH FACING SHORES...HAZARDOUS SURF OF 7 TO 9 FEET COULD FALL
BELOW HAZARDOUS LEVELS TODAY. HOWEVER...TROPICAL DEPRESSION 27W WILL
CAUSE SURF TO RISE AGAIN DEPENDING ON ITS EXACT TRACK THROUGH THE
MARIANAS THE NEXT COUPLE OF DAYS.

FOR WEST FACING REEFS...DANGEROUS SURF OF 13 TO 16 FEET WILL CONTINUE
THROUGH MONDAY BEFORE SUBSIDING SLOWLY MONDAY EVENING AS WEST SWELL
DECREASES AND SHIFTS TO THE NORTHWEST. MINOR COASTAL INUNDATION
AROUND 1 TO 2 FEET IS POSSIBLE AROUND TIMES OF HIGH TIDE. THE NEXT
HIGH TIDES WILL BE AROUND 930 AM THIS MORNING AND 830 PM THIS
EVENING. ALTHOUGH SURF WILL SLOWLY DIMINISH STARTING MONDAY
EVENING...SURF WILL REMAIN HAZARDOUS THROUGH WEDNESDAY.

FOR NORTH FACING REEFS...SURF OF 6 TO 8 FEET WILL SLOWLY RISE
TODAY...AND COULD BECOME HAZARDOUS AT 7 TO 10 FEET THIS AFTERNOON.
SURF MAY INCREASE ANOTHER 1 TO 2 FEET MONDAY BEFORE SLOWLY SUBSIDING
TUESDAY OR WEDNESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A HIGH SURF WARNING INDICATES THAT DANGEROUS...BATTERING WAVES WILL
POUND THE SHORELINE. THIS WILL RESULT IN LIFE-THREATENING CONDITIONS.

A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE
ADVISORY AREA...PRODUCING LOCALIZED BEACH EROSION AND DANGEROUS
SWIMMING CONDITIONS.

&&

$$

Special Weather Statement
GUZ001>004-220200-
Guam-Rota-Tinian-Saipan-
1145 PM ChST Sat Oct 21 2017

Tropical Depression 27W was located near latitude 11.7N and longitude
148.6E at 1000 PM ChST. This position was

About 305 miles southeast of Saipan
About 305 miles southeast of Tinian
About 285 miles southeast of Rota
About 285 miles east-southeast of Guam

Tropical depression 27W is expected to drift southwest Sunday before
turning to the west then northwest by Tuesday. Maximum sustained
winds are currently 35 mph, and only a slight increase in strength is
currently expected through Monday.

Current model trends agree on a southward dip the next couple of days
followed by a turn to the northwest, but there is still some
uncertainty as to the strength of the system. All computer models
keep 27W weak as it drifts southwest and indicate only minimal
intensification, possibly into a tropical storm, as it passes south
of Guam on Tuesday.

Since 27W is southeast of the Marianas, it bears watching and we will
continue to monitor it until it has passed the islands.

Latest models show showers and thunderstorms slowly increasing Sunday
morning and even further Tuesday and Tuesday night. North to
northeast winds Sunday will gradually turn to the east Monday and to
the southeast on Tuesday. The strongest winds are still expected
Monday night through Tuesday night once 27W is to the south or
southwest. Winds could reach 20 to 25 mph with gusts up to 35 mph,
before decreasing Wednesday.

In addition to the high surf conditions seen along west and north
facing reefs of the Marianas due to distant Super Typhoon Lan,
increased winds from TD 27W will cause seas to increase along east
and south facing reefs around Monday with surf likely becoming
hazardous on Tuesday. The rip current risk will remain high through
midweek.

$$

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