Hurricane Irma Special Weather Bulletin 7

...A HURRICANE WARNING IS IN EFFECT FOR ST. MAARTEN...

DATE ISSUED: Monday, September 4, 2017 TIME ISSUED: 05:05 PM

... IRMA STRENGTHENS AS IT HEADS TOWARD THE LEEWARD ISLANDS.... ...PREPARATIONS WITHIN THE WARNING AREA SHOULD BE RUSHED TO COMPLETION...

Location: Lat. 16.7N ....Lon. 54.4W
About: 580 miles ESE of St. Maarten
Maximum sustained winds: 130 mph ....215 KM/H Present Movement: W...265 degrees at 13 mph...20 KM/H Minimum Central Pressure: 944 mb....27.88 inches

DISCUSSION AND 24-HOUR OUTLOOK

AT 05:00PM...THE CENTER OF HURRICANE IRMA WAS LOCATED NEAR
LATITUDE 16.7 NORTH...LONGITUDE 54.4 WEST OR ABOUT 580 MILES EAST-SOUTHEAST OF ST. MAARTEN.

IRMA IS MOVING TOWARD THE WEST NEAR 13 MPH (20 KM/H). THIS MOTION IS EXPECTED TO CONTINUE INTO TUESDAY, FOLLOWED BY A WEST-NORTHWESTWARD TURN LATE TUESDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 130 MPH...215 KM/H...WITH HIGHER GUSTS. ADDITIONAL STRENGTHENING IS ANTICIPATED THROUGH THE NEXT COUPLE OF DAYS.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 40 MILES (65KM) FROM THE CENTER AND TROPICAL STORM FORCE WINDS EXTEND UP TO 140 MILES (220KM) FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 944 MB...27.88 INCHES.

ON THE FORECAST TRACK, THE CENTER OF IRMA WILL MOVE NEAR ST. MAARTEN TUESDAY NIGHT INTO EARLY WEDNESDAY. HOWEVER CONDITIONS WILL BEGIN TO DETERIORATE BY TUESDAY EVENING.

HAZARDS AFFECTING LAND AND SEA

WIND:

Hurricane conditions are expected in St. Maarten by late Tuesday night however Tropical storm force winds are expected earlier Tuesday evening.

RAINFALL: Irma is expected to produce total rainfall accumulations of 3-6 inches with isolated maximum amounts of 10 inches across the Leeward Islands.

STORM SURGE: The combination of a dangerous storm surge and large breaking waves will raise water levels by as much as 6 to 9 feet above normal tide levels along the coasts of St Maarten. Near the coast, the surge will be accompanied by large and destructive waves.

SEAS: Swells generated by Irma will affect the local area for the next several days. These swells are likely to cause life threatening surf and rip current conditions especially on the northern and eastern shores. Mariners are advised to stay in port in order to safeguard life and property.

ALL RESIDENTS/VISITORS ARE STRONGLY ADVISED TO BEGIN FINALIZING PREPARATIONS TO PROTECT LIFE AND PROPERTY, AND CONTINUE MONITORING THE PROGRESS OF THE HURRICANE.


A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...GENERALLY WITHIN 36 HOURS

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