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Hurricane Maria Graphics

2017-09-18 13:49:40| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Mon, 18 Sep 2017 11:49:40 GMT Wind Speed Probabilities last updated Mon, 18 Sep 2017 09:36:58 GMT

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Summary for Hurricane Maria (AT5/AL152017)

2017-09-18 13:48:10| National Hurricane Center (Atlantic)

...HURRICANE HUNTER AIRCRAFT REPORTS MARIA INTENSIFYING... ...EXPECTED TO BECOME A MAJOR HURRICANE LATER TODAY... As of 8:00 AM AST Mon Sep 18 the center of Maria was located near 14.6, -59.7 with movement WNW at 12 mph. The minimum central pressure was 967 mb with maximum sustained winds of about 110 mph.

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Hurricane Maria Public Advisory Number 8A

2017-09-18 13:48:10| National Hurricane Center (Atlantic)

Issued at 800 AM AST Mon Sep 18 2017 000 WTNT35 KNHC 181148 TCPAT5 BULLETIN Hurricane Maria Intermediate Advisory Number 8A NWS National Hurricane Center Miami FL AL152017 800 AM AST Mon Sep 18 2017 ...HURRICANE HUNTER AIRCRAFT REPORTS MARIA INTENSIFYING... ...EXPECTED TO BECOME A MAJOR HURRICANE LATER TODAY... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...14.6N 59.7W ABOUT 85 MI...135 KM E OF MARTINIQUE ABOUT 120 MI...195 KM ESE OF DOMINICA MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...967 MB...28.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Government of St. Lucia has issued a Hurricane Warning for St. Lucia. The Meteorological Service of St. Maarten has issued a Tropical Storm Warning for St. Maarten. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Guadeloupe * Dominica * St. Kitts, Nevis, and Montserrat * Martinique * St. Lucia A Tropical Storm Warning is in effect for... * Antigua and Barbuda * Saba and St. Eustatius * St. Maarten A Hurricane Watch is in effect for... * Puerto Rico, Vieques, and Culebra * U.S. Virgin Islands * British Virgin Islands * Saba and St. Eustatius * St. Maarten * St. Martin and St. Barthelemy * Anguilla A Tropical Storm Watch is in effect for... * Barbados * St. Vincent and the Grenadines A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Interests elsewhere in the Lesser Antilles and the Dominican Republic should monitor the progress of this system. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside the United States, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 800 AM AST (1200 UTC), the center of Hurricane Maria was located near latitude 14.6 North, longitude 59.7 West. Maria is moving toward the west-northwest near 12 mph (19 km/h), and this motion with a decrease in forward speed is expected through Tuesday night. On the forecast track, the center of Maria will move across the Leeward Islands late today and tonight, and then over the extreme northeastern Caribbean Sea Tuesday and Tuesday night. Reports from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 110 mph (175 km/h) with higher gusts. Maria is currently a Category 2 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional rapid strengthening is forecast during the next 48 hours, and Maria is expected to become a dangerous major hurricane before it moves through the Leeward Islands. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 km). The minimum central pressure estimated from the Hurricane Hunter aircraft data is 967 mb (28.56 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Hurricane conditions are first expected within portions of the Leeward Islands by late today, with tropical storm conditions beginning during the next several hours. Hurricane conditions are possible within the hurricane watch area by Tuesday, with tropical storm conditions possible tonight. Tropical storm conditions are possible in the tropical storm watch area through tonight. STORM SURGE: A dangerous storm surge accompanied by large and destructive waves will raise water levels by as much as 5 to 7 feet above normal tide levels near where the center of Maria moves across the Leeward Islands. RAINFALL: Maria is expected to produce total rain accumulations of 6 to 12 inches with isolated maximum amounts of 20 inches across the central and southern Leeward Islands, including Puerto Rico and the U.S. and British Virgin Islands, through Wednesday night. Maria is also expected to produce total rain accumulations of 2 to 4 inches with isolated maximum amounts of 8 inches over the remaining northern Leeward Islands from Barbuda to Anguilla, as well as the Windward Islands and Barbados. Rainfall on all of these islands could cause life-threatening flash floods and mudslides. SURF: Swells generated by Maria are affecting the Lesser Antilles. 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 AM AST. $$ Forecaster Beven

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Hurricane Maria Graphics

2017-09-18 10:42:05| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Mon, 18 Sep 2017 08:42:05 GMT Wind Speed Probabilities last updated Mon, 18 Sep 2017 08:42:05 GMT

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Hurricane Maria Forecast Discussion Number 8

2017-09-18 10:36:09| National Hurricane Center (Atlantic)

Issued at 500 AM AST Mon Sep 18 2017 000 WTNT45 KNHC 180836 TCDAT5 Hurricane Maria Discussion Number 8 NWS National Hurricane Center Miami FL AL152017 500 AM AST Mon Sep 18 2017 Maria is maintaining a fairly circular area of intense convection with some accompanying banding features. There has also been considerable lightning occurring near the center over the past several hours, confirming the vigor of the core convection. The current intensity is set at 80 kt which is a blend of Dvorak estimates from TAFB and SAB. An Air Force Reserve Unit Hurricane Hunter aircraft is scheduled to investigate Maria in a couple of hours and will give another estimate of the strength of the hurricane. With warm waters and weak shear anticipated along the projected track of Maria, additional strengthening is forecast. According to the SHIPS-RI guidance, there is a significant probability of rapid intensification over the next day or two. The official intensity forecast is similar to the model consensus and the latest HWRF simulation. Maria is likely to be at category 3 or 4 intensity by the time it moves into the extreme northeastern Caribbean Sea. Geostationary satellite fixes and the position estimates from the Martinique radar give a motion of about 290/11 kt. A high pressure area to the north of Maria should maintain the west-northwestward motion for the next several days. Late in the forecast period, the high weakens and this should cause a turn toward the north-northwest. The official track forecast is similar to the HFIP Corrected Consensus model as well as the ECMWF and lies on the left side of the guidance suite. KEY MESSAGES: 1. Maria is likely to strengthen significantly, and is expected to be at major hurricane intensity when it affects portions of the Leeward Islands over the next few days, bringing dangerous wind, storm surge and rainfall hazards. 2. Maria is likely to affect the British and U.S. Virgin Islands and Puerto Rico by mid week as a dangerous major hurricane. Hurricane watches have been issued for the U.S. and British Virgin Islands as well as for Puerto Rico. Interests in these areas should monitor the progress of Maria and follow any advice given by local officials. FORECAST POSITIONS AND MAX WINDS INIT 18/0900Z 14.6N 59.5W 80 KT 90 MPH 12H 18/1800Z 15.1N 60.6W 90 KT 105 MPH 24H 19/0600Z 15.8N 62.0W 105 KT 120 MPH 36H 19/1800Z 16.6N 63.4W 115 KT 130 MPH 48H 20/0600Z 17.4N 64.8W 120 KT 140 MPH 72H 21/0600Z 19.0N 67.7W 115 KT 130 MPH 96H 22/0600Z 21.0N 70.4W 110 KT 125 MPH 120H 23/0600Z 23.5N 72.0W 105 KT 120 MPH $$ Forecaster Pasch

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