West Pacific/ Guam /Marianas: Tropical Disturbance (#97W): High chance of a significant Tropical #Cyclone within next 24 hrs (JTWC 25/0200Z) – Published 25 Jun 2017 1550z (GMT/UTC)

Tropical Disturbance (Invest  97W)

….has a high chance of becoming a significant Tropical Cyclone within the next 24 hours (JTWC 25/0200Z)

Guam and Marianas Beware!

Joint Typhoon Warning Center (JTWC)

 

 

WTPN21 PGTW 250200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
160 NM EITHER SIDE OF A LINE FROM 13.5N 146.2E TO 15.8N 141.5E
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 15 TO 20 KNOTS. METSAT
IMAGERY AT 250000Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 13.7N 145.8E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 07
KNOTS.
2. REMARKS: THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 13.0N 147.8E, IS NOW LOCATED NEAR 13.7N 145.8E, APPROXIMATELY
65 NM EAST-NORTHEAST OF ANDERSEN AFB, GUAM. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY SHOWS A SLIGHTLY ELONGATED CLOSED CIRCULATION WITH
INCREASING CONVECTION LOCATED OVER THE CENTER. A 242032Z SSMIS 91GHZ
MICROWAVE IMAGE SHOWS A SLIGHTLY ELONGATED CIRCULATION WITH
CONVECTIVE BANDING BEGINNING TO FORM AND THE MAJORITY OF THE
CONVECTION LOCATED ON THE EASTERN SIDE. THE DISTURBANCE IS CURRENTLY
LOCATED IN AN AREA OF GOOD UPPER LEVEL DIVERGENCE, LOW VERTICAL WIND
SHEAR (10-15 KNOTS), AND VERY WARM (30-31C) SEA SURFACE
TEMPERATURES. GLOBAL MODELS SHOW THE SYSTEM TRACKING TO THE
NORTHWEST OVER THE NEXT FEW DAYS. MAXIMUM SUSTAINED SURFACE WINDS
ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS HIGH.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
260200Z.//
NNNN

===============================================================================

000
WWMY80 PGUM 251617 CCA
SPSMY

Special Weather Statement…Corrected
National Weather Service Tiyan GU
1137 PM ChST Sun Jun 25 2017

GUZ001>004-260300-
Guam-Rota-Tinian-Saipan-
1137 PM ChST Sun Jun 25 2017

…TROPICAL DISTURBANCE MOVING THROUGH THE MARIANAS TONIGHT…

A developing tropical disturbance near Rota remains the subject
of a Tropical Cyclone Formation Alert by the Joint Typhoon Warning
Center. This disturbance will continue to produce scattered
showers, isolated thunderstorms, occasional heavy rain and gusty
winds tonight as it continues westward.

If you are planning any outdoor activities through Monday evening,
be aware of current conditions and be prepared to move indoors,
if necessary. Mariners operating small vessels should remain in
port. Beach goers and swimmers need to stay close to shore and
move indoors if lightning is present.

Residents should stay informed on the latest statements 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
http://www.prh.noaa.gov/guam/.

$$

Kleeschulte

Guam Infrared Color (Himawari 8)

MARITIME/SHIPPING

000
WHGM70 PGUM 250354
MWWGUM

URGENT – MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
154 PM CHST SUN JUN 25 2017

PMZ152>154-252000-
/O.NEW.PGUM.SI.Y.0004.170625T0354Z-170625T2000Z/
ROTA COASTAL WATERS-TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
154 PM CHST SUN JUN 25 2017

…SMALL CRAFT ADVISORY FOR WINDS IN EFFECT UNTIL 6 AM CHST
MONDAY…

THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A SMALL CRAFT
ADVISORY FOR WINDS, WHICH IS IN EFFECT UNTIL 6 AM CHST MONDAY.

EAST WINDS OF 20 TO 25 KNOTS WITH GUSTS TO AROUND 30 KNOTS WILL
BEGIN LATER THIS AFTERNOON AND CONTINUE THROUGH TONIGHT. WINDS
WILL DIMINISH AFTER THE DEVELOPING TROPICAL DISTURBANCE PASSES
THROUGH THE MARIANAS WATERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

INEXPERIENCED MARINERS…ESPECIALLY THOSE OPERATING SMALLER
VESSELS…SHOULD AVOID SAILING IN THESE CONDITIONS.

&&

$$

STANKO

060
FZMY70 PGUM 250715
MWSMY

MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TIYAN GU
515 PM CHST SUN JUN 25 2017

PMZ151>154-252000-
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-
SAIPAN COASTAL WATERS-
515 PM CHST SUN JUN 25 2017

A DEVELOPING TROPICAL DISTURBANCE WILL BRING FREQUENT LIGHTNING
TO THE MARIANAS WATERS TONIGHT. SEEK SAFE SHELTER INDOORS, OR
BELOW DECK FOR MARINERS AWAY FROM LAND. VISIBILITES WILL BE BELOW
1 NAUTICAL MILE IN HEAVIER SHOWERS AND THUNDERSTORMS. REMAIN ALERT
FOR FURTHER BULLETINS FROM THE NATIONAL WEATHER SERVICE IN TIYAN,
GUAM.

$$

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