NWS: Tropical Cyclone Formation Alert; System Passing Well North of both Guam and Saipan

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Guam -The National Weather Service is advising that the Joint Typhoon Warning Center has issued a newly extended Tropical Cyclone Formation Alert for a system that is passing well north of both Guam and Saipan.

As of  4 pm the center was estimated from satellite to be near 19N and 146E, less than 50 miles east of Agrihan and Pagan and about 220 miles north of Saipan and about 350 miles north-northeast of Guam.

Read the NWS Alert

Movement was generally toward the Northwest. As the disturbance moves Northwest tonight and Tuesday, scattered showers and isolated thunderstorms are expected across the Mariana islands,  with up to 3 inches possible through Tuesday morning for islands north of Saipan.

This could result in minor flooding of roads and poor-drainage areas.

Rainfall accumulations of an inch or less are now expected for islands Saipan and southward.

Since the disturbance is still in its beginning stage.

Strong winds are not expected. However residents of far northern islands such as Pagan and Agrihan should monitor the progress of this disturbance through Tuesday morning.

 

SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TIYAN GU 301 PM CHST MON SEP 20 2010  GUZ004-202000- SAIPAN- 301 PM CHST MON SEP 20 2010  A DEVELOPING TROPICAL DISTURBANCE EAST OF THE FAR NORTHERN MARIANAS REMAINS THE SUBJECT OF A NEWLY EXTENDED TROPICAL CYCLONE FORMATION ALERT FROM THE JOINT TYPHOON WARNING CENTER. AT 4 PM THE CENTER WAS ESTIMATED FROM SATELLITE TO BE NEAR 19N AND 146E...LESS THAN 50 MILES EAST OF AGRIHAN AND PAGAN...ABOUT 220 MILES NORTH OF SAIPAN AND ABOUT 350 MILES NORTH-NORTHEAST OF GUAM. MOVEMENT WAS GENERALLY TOWARD THE NORTHWEST.  AS THE DISTURBANCE MOVES NORTHWEST TONIGHT AND TUESDAY...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED ACROSS THE MARIANA ISLANDS...WITH UP TO 3 INCHES POSSIBLE THROUGH TUESDAY MORNING FOR ISLANDS NORTH OF SAIPAN. THIS COULD RESULT IN MINOR FLOODING OF ROADS AND POOR-DRAINAGE AREAS. RAINFALL ACCUMULATIONS OF AN INCH OR LESS ARE NOW EXPECTED FOR ISLANDS SAIPAN AND SOUTHWARD.  SINCE THE DISTURBANCE IS STILL IN ITS BEGINNING STAGE...STRONG WINDS  ARE NOT EXPECTED. HOWEVER...RESIDENTS OF FAR NORTHERN ISLANDS SUCH  AS PAGAN AND AGRIHAN SHOULD MONITOR THE PROGRESS OF THIS DISTURBANCE  THROUGH TUESDAY MORNING.