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534 PM CHST SAT OCT 21 2017
...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM CHST WEDNESDAY...
THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A HIGH SURF
ADVISORY, WHICH IS IN EFFECT UNTIL 6 PM CHST WEDNESDAY.
FOR SOUTH FACING SHORES...HAZARDOUS SURF OF 7 TO 9 FEET COULD
FALL BELOW HAZARDOUS LEVELS TONIGHT. HOWEVER...TROPICAL
DEPRESSION 27W MAY CAUSE SURF TO RISE AGAIN DEPENDING ON
ITS EXACT TRACK THROUGH THE MARIANAS THE NEXT COUPLE OF DAYS.
FOR WEST FACING REEFS...HAZARDOUS SURF OF 11 TO 14 FEET WILL
CONTINUE THE NEXT COUPLE OF DAYS. SURF COULD REACH DANGEROUS
LEVELS OF 15 FEET TONIGHT. SOME MINOR COASTAL INUNDATION IS
POSSIBLE AROUND TIMES OF HIGH TIDE. THE NEXT HIGH TIDE WILL BE
AROUND 807 PM THIS EVENING. SURF WILL SLOWLY DIMINISH STARTING
SUNDAY...BUT WILL REMAIN HAZARDOUS THROUGH WEDNESDAY.
FOR NORTH FACING REEFS...SURF OF 6 TO 8 FEET WILL SLOWLY RISE
TONIGHT...AND COULD BECOME HAZARDOUS AT 7 TO 10 FEET SUNDAY. SURF
MAY INCREASE ANOTHER 1 TO 2 FEET MONDAY BEFORE SLOWLY SUBSIDING
AVOID VENTURING OUT ON EXPOSED REEFS AND BEACHES...ESPECIALLY
THOSE FACING WEST AND SOUTH AND NORTH...AS RIP CURRENTS WILL BE
$$Special Weather Statement
856 AM ChST Sat Oct 21 2017
Tropical Depression 27W was located near latitude 12.2N longitude
149.6E at 700 AM ChST. This position was
325 miles east-southeast of Rota
330 miles southeast of Saipan and Tinian
340 miles east-southeast of Guam
The Tropical Storm Watch for Saipan, Tinian and the northern CNMI
islands was cancelled this morning.
Tropical depression 27W will continue moving slowly on a general
west to west-northwest heading through Monday. Maximum sustained
winds are currently 35 mph, with little change in strength
expected through Monday.
While current model guidance has come into better agreement, there
is still some uncertainty as to the track and strength of the
system. All computer models now move the system west and keep it
weak until it moves west of the Marianas. The current forecast
track has the tropical depression passing south of Guam Monday
into Monday night.
Since the system is southeast of the Marianas it bears watching
and we will continue to monitor it until it has passed the
Based on the current track, rain chances will increase and could
become heavy at times. Wind should increase as well. Right now,
wind could reach 20 to 25 mph with gusts as high as 30 mph, before
decreasing into Wednesday. A large band of clouds north of the
circulation center will bring scattered showers and isolated
thunderstorms to Saipan and Tinian later today and to Rota and
Guam tonight or Sunday.
High surf conditions will continue into early next week with
hazardous surf of 11 to 14 feet on west facing reefs over the next
Rip current risk will also remain high and hazardous into next