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Tropical Storm Helene Public Advisory Number 28
2018-09-14 10:51:53| National Hurricane Center (Atlantic)
Issued at 500 AM AST Fri Sep 14 2018 292 WTNT33 KNHC 140851 TCPAT3 BULLETIN Tropical Storm Helene Advisory Number 28 NWS National Hurricane Center Miami FL AL082018 500 AM AST Fri Sep 14 2018 ...HELENE SPEEDING NORTHWARD... ...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS WEEKEND... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...30.6N 36.0W ABOUT 760 MI...1220 KM SW OF LAJES AIR BASE IN THE AZORES MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Portugal has issued a Tropical Storm Warning for all of the Azores Islands. 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, generally within 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 500 AM AST (0900 UTC), the center of Tropical Storm Helene was located near latitude 30.6 North, longitude 36.0 West. Helene is moving toward the north near 23 mph (37 km/h). A turn toward the northeast is expected over the weekend. On the forecast track, Helene will pass near or over the Azores late Saturday or Sunday. Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Little change in strength is forecast during the next 48 hours. Gradual weakening is expected after Helene becomes a post-tropical cyclone over the weekend. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure is 992 mb (29.30 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 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Zelinsky
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