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| #940157 (Received by flhurricane at: 10:44 AM 14.Sep.2018) TCPAT3 BULLETIN Tropical Storm Helene Advisory Number 29 NWS National Hurricane Center Miami FL AL082018 1100 AM AST Fri Sep 14 2018 ...HELENE MAINTAINING TROPICAL STORM STRENGTH... ...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS WEEKEND... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...32.9N 36.3W ABOUT 655 MI...1055 KM SW OF LAJES AIR BASE IN THE AZORES MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * All of the Azores Islands A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 24 to 36 hours. Interests in the Ireland and United Kingdom should consult products from their local meteorological service for information about potential impacts from Helene in those locations. Local forecasts and warnings for the UK can be found on the website of the UK Met Office at https://www.metoffice.gov.uk/. Local forecasts and warnings for Ireland can be found on the website of Met Eireann at https://www.met.ie/. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Storm Helene was located near latitude 32.9 North, longitude 36.3 West. Helene is moving toward the north near 23 mph (37 km/h). A turn toward the north-northeast is forecast Saturday followed by a turn toward the northeast by Sunday night. On the forecast track, Helene will pass near or over the Azores late Saturday or Sunday. Satellite data indicate that maximum sustained winds have increased to near 70 mph (110 km/h) with higher gusts. Little change in strength is forecast during the next 24 hours. Afterward, gradual weakening is expected over the weekend as Helene makes the transition to a post-tropical extratropical cyclone. Tropical-storm-force winds extend outward up to 160 miles (260 km) from the center. The estimated minimum central pressure is 988 mb (29.18 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected within the warning area by late Saturday. RAINFALL: Helene is expected to produce total rainfall amounts of 2 to 4 inches across the Azores, with isolated amounts up to 8 inches across the western Azores. This rainfall may cause life-threatening flash flooding. SURF: Swells generated by Helene are affecting portions of the Azores. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Roberts |
