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>004-191900-
/O.EXT.PGUM.SU.Y.0003.000000T0000Z-171025T0800Z/
GUAM-ROTA-TINIAN-SAIPAN-
430 PM CHST THU OCT 19 2017

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM CHST WEDNESDAY ALONG
SOUTH AND WEST FACING SHORES...

FOR WEST FACING SHORES...EXPECT HAZARDOUS SURF AT 10 TO 12 FEET
THROUGH FRIDAY NIGHT. SURF WILL BUILD FURTHER OVER THE WEEKEND...
POSSIBLY BECOMING DANGEROUS AT 15 FEET BY SUNDAY.

FOR SOUTH FACING SHORES...EXPECT HAZARDOUS SURF AT 8 TO 10 FEET
THROUGH FRIDAY...THEN DIMINISHING TO BELOW HAZARDOUS LEVELS ON
FRIDAY EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Special Weather Statement
GUZ001>004-191400-
Guam-Rota-Tinian-Saipan-
1006 AM ChST Thu Oct 19 2017

TYPHOON LAN (25W) IS LOCATED NEAR 15N131E OR ABOUT 915 MILES WEST
OF GUAM. IT IS MOVING NORTHWARD...WELL WEST OF THE MARIANAS.

ANOTHER CIRCULATION IS LOCATED NORTHEAST OF SAIPAN NEAR
15.5N147.8E. IT IS QUASI-STATIONARY WITH WINDS OF 20 TO 25 MPH.
THE CIRCULATION IS NOW THE SUBJECT OF A TROPICAL CYCLONE
FORMATION ALERT FROM THE JOINT TYPHOON WARNING CENTER. GUIDANCE
DIFFERS AS TO THE ULTIMATE PATH OF THIS CIRCULATION AND TO WHAT,
IF ANY, SIGNIFICANT IMPACTS IT WILL BRING TO THE MARIANAS. THESE
IMPACTS WOULD LIKELY NOT OCCUR PRIOR TO THE WEEKEND. IT IS STILL
POSSIBLE TO SEE AN ISOLATED HEAVY SHOWER ACCOMPANIED BY GUSTY WIND
THROUGH TONIGHT.

SEA CONDITIONS WILL BE HAZARDOUS FOR SMALL CRAFT IN RESPONSE TO
GUSTY WINDS AND THE BUILDING SOUTHWEST SWELL GENERATED FROM THE
BROAD CIRCULATION OF TYPHOON LAN. COMBINED SEAS WILL BUILD TO 10
TO 13 FEET OVER THE WEEKEND. THE LARGE SWELL WILL ALSO MAINTAIN
HAZARDOUS SURF AND A HIGH RISK OF RIP CURRENTS INTO EARLY NEXT
WEEK.

CONDITIONS WILL NEED TO BE MONITORED CAREFULLY AS SEAS AND SURF
BUILD...ESPECIALLY FOR MARINE ACTIVITIES THROUGH THE WEEKEND. THE
CIRCULATION NEAR SAIPAN WILL ESPECIALLY NEED TO BE WATCHED
CLOSELY AS IT GRADUALLY DEVELOPS.

IF YOU ARE PLANNING OUTDOOR OR MARINE ACTIVITIES OR INTER-ISLAND
TRAVEL BE AWARE OF CURRENT MARINE CONDITIONS AND STAY INFORMED OF
THE LATEST FORECASTS AND ADVISORIES ISSUED BY THE NATIONAL WEATHER
SERVICE AND LOCAL EMERGENCY MANAGEMENT OFFICES.

PRODUCTS ISSUED BY THE NATIONAL WEATHER SERVICE ARE POSTED ON THE
WFO GUAM WEB PAGE AT WWW.PRH.NOAA.GOV/GUAM/.

$$

National Weather Service

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