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Summary for Tropical Storm Dorian (AT5/AL052019)
2019-08-27 01:57:44| National Hurricane Center (Atlantic)
...DORIAN NEARING BARBADOS... As of 8:00 PM AST Mon Aug 26 the center of Dorian was located near 13.0, -59.1 with movement WNW at 14 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 60 mph.
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Tropical Storm Dorian Public Advisory Number 10A
2019-08-27 01:57:44| National Hurricane Center (Atlantic)
Issued at 800 PM AST Mon Aug 26 2019 000 WTNT35 KNHC 262357 TCPAT5 BULLETIN Tropical Storm Dorian Intermediate Advisory Number 10A NWS National Hurricane Center Miami FL AL052019 800 PM AST Mon Aug 26 2019 ...DORIAN NEARING BARBADOS... SUMMARY OF 800 PM AST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...13.0N 59.1W ABOUT 30 MI...50 KM ESE OF BARBADOS ABOUT 140 MI...220 KM ESE OF ST. LUCIA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * St. Lucia A Tropical Storm Warning is in effect for... * Barbados * Martinique * St. Lucia * St. Vincent and the Grenadines A Tropical Storm Watch is in effect for... * Dominica * Grenada and its dependencies * Saba and St. Eustatius * Puerto Rico A Hurricane Watch means that hurricane conditions are possible within the watch area, in this case, within the next 24 hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Interests in the Virgin Islands and Hispaniola should monitor the progress of Dorian as watches for these areas could be required tonight or Tuesday. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 PM AST (0000 UTC), the center of Tropical Storm Dorian was located by an Air Force Reserve Unit Hurricane Hunter aircraft near latitude 13.0 North, longitude 59.1 West. Dorian is moving toward the west-northwest near 14 mph (22 km/h) and this motion is expected to continue through Tuesday night, followed by a turn toward the northwest on Wednesday. On the forecast track, the center of Dorian is expected to move near or over the Windward Islands this evening and tonight and move into the eastern Caribbean Sea on Tuesday. Dorian is forecast to pass near or south of Puerto Rico on Wednesday and approach eastern Hispaniola Wednesday night. Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. Some strengthening is forecast during the next few days, and Dorian could be near hurricane strength when it passes through the northern Windward Islands early Tuesday, and it is expected to be a hurricane when it moves near Puerto Rico and eastern Hispaniola. Tropical-storm-force winds extend outward up to 45 miles (75 km) from the center. The minimum central pressure reported by the Hurricane Hunter aircraft is 1007 mb (29.74 inches). HAZARDS AFFECTING LAND ---------------------- Rainfall: Dorian is expected to produce total rain accumulations of 3 to 8 inches in the Windward Islands from Martinique south to St. Vincent, including Barbados. Isolated maximum totals of 10 inches are possible across the northern Windward Islands. Rainfall totals of 1 to 3 inches are expected from the Grenadines, south to Grenada and across Dominica. Rainfall totals of 2 to 4 inches with maximum totals of 6 inches are possible across Puerto Rico and St. Croix. WIND: Hurricane conditions are possible tonight and early Tuesday within the Hurricane Watch area. Tropical storm conditions are likely in the warning area tonight and early Tuesday. Tropical storm conditions are possible within the tropical storm watch area in the Lesser Antilles tonight or Tuesday and in Puerto Rico on Wednesday. SURF: Swells generated by Dorian will begin affecting portions of the Lesser Antilles tonight and continue into Tuesday. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Pasch
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Tropical Storm Dorian Forecast Discussion Number 10
2019-08-26 22:55:11| National Hurricane Center (Atlantic)
Issued at 500 PM AST Mon Aug 26 2019 000 WTNT45 KNHC 262055 TCDAT5 Tropical Storm Dorian Discussion Number 10 NWS National Hurricane Center Miami FL AL052019 500 PM AST Mon Aug 26 2019 Dorian's convective pattern has waxed and waned this afternoon due to intrusions of dry mid-level air while the upper-level outflow pattern has continued to expand and become more symmetrical. Although the inner-core convection has decreased recently, a recent burst of strong convection with cloud tops colder than -80C has redeveloped just north of the low-level center. The initial intensity remains at 50 kt based on a an average of satellite intensity estimates ranging from 45 kt to 61 kt from TAFB, SAB, and UW-CIMSS SATCON and ADT. An Air Force Reserve reconnaissance aircraft is scheduled to investigate Dorian by 0000 UTC this evening, and will provide a better estimate of the cyclone's intensity. The initial motion is west-northwestward or 290/12 kt. There is no significant change to the previous forecast track or reasoning. The latest NHC model guidance remains in very agreement that Dorian will move west-northwestward across the central Lesser Antilles tonight and into the northeastern Caribbean Sea on Tuesday as the cyclone moves around the edge of the Bermuda-Azores ridge located well to the north. On Wednesday, Dorian should turn northwestward into a small weakness in the ridge, allowing the tropical cyclone to pass near or between western Puerto Rico and the eastern Dominican Republic. By late Thursday and Friday, the ridge is forecast to build back in as an upper-level trough lifts out to the north, causing Dorian to turn back toward the west-northwest in the vicinity of the central Bahamas. The new official forecast track is just an extension of the previous one since the latest model guidance, especially the consensus models, are tightly packed around the previous track forecast. The intensity forecast remains something of an enigma. The majority of the environmental conditions support at least steady strengthening, with the main hindrance being the very dry mid-level air surrounding the cyclone and occasionally being entrained into Dorian's inner-core region. The small but robust circulation should continue mix out the brief dry air intrusions, but when an eyewall will form is still uncertain. Given that Dorian will be moving into the convective maximum period later tonight, the intensity forecast still calls for Dorian be near hurricane strength when it passes through the Windward Islands. Interaction with Hispaniola and possibly Puerto Rico should result in some weakening in 72-96 hours, followed by restrengthening on days 4 and 5 when Dorian will be moving over the very warm waters in the Bahamas in low shear conditions. Most of the global models along with the statistical- dynamical SHIPS and LGEM intensity models are now showing pronounced strengthening while Dorian is moving near or through the Bahamas, so the official forecast shows a significant change to the previous one at 96 and 120 hours. However, confidence in the intensity forecast at days 4 and 5 is very low given the uncertainty about how much of Dorian's core will interact with Hispaniola. Key Messages: 1. Dorian is expected to bring tropical storm conditions to portions of the Lesser Antilles tonight and Tuesday, where tropical storm watches and warnings are in effect. Hurricane conditions are possible in St. Lucia, where a Hurricane Watch is in effect. Rainfall of 3 to 8 inches is expected from Martinique to St. Vincent, including Barbados, with isolated totals as high as 10 inches possible. 2. Tropical storm conditions are possible in Puerto Rico on Wednesday, where a tropical storm watch has been issued. Rainfall of 2 to 4 inches with maximum totals of 6 inches are possible across Puerto Rico and St. Croix. 3. Watches will likely be issued for portions of Hispaniola tonight or Tuesday, as the threat of wind and rain impacts continues to increase. 4. While uncertainty is high, wind and rain impacts are possible in the Bahamas and Florida later this week and this weekend. Residents in these areas should monitor the progress of Dorian and ensure that they have their hurricane plan in place. FORECAST POSITIONS AND MAX WINDS INIT 26/2100Z 12.7N 58.8W 50 KT 60 MPH 12H 27/0600Z 13.4N 60.5W 55 KT 65 MPH 24H 27/1800Z 14.5N 62.6W 60 KT 70 MPH 36H 28/0600Z 15.7N 64.6W 65 KT 75 MPH 48H 28/1800Z 17.1N 66.7W 70 KT 80 MPH 72H 29/1800Z 20.1N 70.2W 50 KT 60 MPH 96H 30/1800Z 23.0N 73.8W 55 KT 65 MPH 120H 31/1800Z 25.5N 78.0W 60 KT 70 MPH $$ Forecaster Stewart
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Tropical Storm Dorian Graphics
2019-08-26 22:41:40| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Mon, 26 Aug 2019 20:41:40 GMT Wind Speed Probabilities last updated Mon, 26 Aug 2019 20:41:40 GMT
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Summary for Tropical Storm Dorian (AT5/AL052019)
2019-08-26 22:40:15| National Hurricane Center (Atlantic)
...TROPICAL STORM WATCH ISSUED FOR PUERTO RICO... ...TROPICAL STORM CONDITIONS EXPECTED IN THE WINDWARD ISLANDS LATER TONIGHT WITH HURRICANE CONDITIONS POSSIBLE ON TUESDAY... As of 5:00 PM AST Mon Aug 26 the center of Dorian was located near 12.7, -58.8 with movement WNW at 14 mph. The minimum central pressure was 1002 mb with maximum sustained winds of about 60 mph.
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