Hurricane Irma 8pm Sept 7 update
Hurricane Irma Intermediate Advisory Number 35A NWS National Hurricane Center Miami FL AL112017 800 PM EDT Thu Sep 07 2017 …IRMA PUMMELING THE TURKS AND CAICOS ISLANDS… SUMMARY OF 800 PM EDT…0000 UTC…INFORMATION
.21.1N 71.8W ABOUT 55 MI…85 KM WSW OF GRAND TURK ISLAND ABOUT 90 MI…145 KM E OF GREAT INAGUA ISLAND MAXIMUM SUSTAINED WINDS…175 MPH…280 KM/H PRESENT MOVEMENT…WNW OR 285 DEGREES AT 16 MPH…26 KM/H MINIMUM CENTRAL PRESSURE…919 MB…27.14 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY: The government of the Dominican Republic has discontinued the Hurricane Warning east of Cabo Frances Viejo.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Watch is in effect for… * Jupiter Inlet southward around the Florida peninsula to Bonita Beach * Florida Keys A Hurricane Warning is in effect for… * Dominican Republic from Cabo Frances Viejo to the northern border with Haiti * Haiti from the northern border with the Dominican Republic to Le Mole St. Nicholas * Southeastern Bahamas and the Turks and Caicos Islands * Cuban provinces of Camaguey, Ciego de Avila, Sancti Spiritus, and Villa Clara * Central Bahamas * Northwestern Bahamas A Hurricane Watch is in effect for… * Jupiter Inlet southward around the Florida peninsula to Bonita Beach * Florida Keys * Lake Okeechobee * Florida Bay * Cuban provinces of Guantanamo, Holguin, Las Tunas and Matanzas.
A Tropical Storm Warning is in effect for… * Haiti from south of Le Mole St. Nicholas to Port-Au-Prince * Cuban provinces of Guantanamo, Holguin, and Las Tunas. A Storm Surge Watch means there is a possibility of life- threatening inundation from rising water moving inland from the coastline. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov.
DISCUSSION AND 48-HOUR OUTLOOK
At 800 PM EDT (0000 UTC), the eye of Hurricane Irma was located by an Air Force Reserve reconnaissance aircraft near latitude 21.1 North, longitude 71.8 West. Irma is moving toward the west-northwest near 16 mph (26 km/h), and this general motion is expected to continue for the next couple of days with some decrease in forward speed. On the forecast track, the eye of Irma should continue to move near the Turks and Caicos Islands and toward the southeastern Bahamas this evening. The core of the hurricane will then move between the north coast of Cuba and the Bahamas during the next day or two. Maximum sustained winds remain near 175 mph (280 km/h) with higher gusts. Irma is a category 5 hurricane on the Saffir-Simpson Hurricane Wind Scale. but Irma is forecast to remain a powerful category 4 or 5 hurricane during the next couple of days. Hurricane-force winds extend outward up to 70 miles (110 km) from the center, and tropical-storm-force winds extend outward up to 185 miles (295 km). The minimum central pressure based on data from the Air Force plane is 919 mb (27.14 inches).
HAZARDS AFFECTING LAND ———————- STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water is expected to reach the following HEIGHTS ABOVE GROUND if the peak surge occurs at the time of high tide… Jupiter Inlet to Bonita Beach, including Florida Keys…5 to 10 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. The combination of a life-threatening storm surge and large breaking waves will raise water levels ABOVE NORMAL TIDE LEVELS by the following amounts within the hurricane warning area near and to the north of the center of Irma. Near the coast, the surge will be accompanied by large and destructive waves. Turks and Caicos Islands…15 to 20 ft Southeastern and central Bahamas…15 to 20 ft Northwestern Bahamas…5 to 10 ft Northern coast of the Dominican Republic…3 to 5 ft Northern coast of Haiti and the Gulf of Gonave…1 to 3 ft Northern coast of Cuba in the warning area.
5 to 10 ft WIND: Hurricane conditions are expected to continue within the hurricane warning area in the Dominican Republic and Haiti tonight. Hurricane conditions are occurring on the Turks and Caicos Islands. Tropical storm and hurricane conditions are beginning in the southeastern Bahamas. It will spread into the central Bahamas by tonight or early Friday. Hurricane conditions are possible within the watch area in Florida by Sunday, with tropical storm conditions possible by late Saturday.
Irma is expected to produce the following rain accumulations through Saturday evening. Northeast Puerto Rico and the British and U.S. Virgin Islands… additional 1 to 2 inches Much of the Bahamas and Turks and Caicos…8 to 12 inches, isolated 20 inches Andros Island and Bimini, Bahamas…12 to 16 inches, isolated 25 inches Northern Dominican Republic and northern Haiti…4 to 10 inches, isolated 15 inches Southern Dominican Republic and southern Haiti…2 to 5 inches Eastern and central Cuba…4 to 10 inches, isolated 15 inches Southeast Florida and the upper Florida Keys…8 to 12 inches, isolated 20 inches Lower Florida Keys…2 to 5 inches In all areas this rainfall may cause life-threatening flash floods and mudslides.
SURF: Swells generated by Irma are affecting Puerto Rico, the Virgin Islands, the southeastern Bahamas, the Turks and Caicos Islands, the northern coast of the Dominican Republic. It should start affecting portions of the southeast coast of the United States later today and tonight. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office.
NEXT ADVISORY ————- Next complete advisory at 1100 PM EDT. $$ Forecaster Berg