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Summary for Tropical Storm Helene (AT3/AL082018)

2018-09-14 16:40:58| National Hurricane Center (Atlantic)

...HELENE MAINTAINING TROPICAL STORM STRENGTH... ...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS WEEKEND... As of 11:00 AM AST Fri Sep 14 the center of Helene was located near 32.9, -36.3 with movement N at 23 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

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Tropical Storm Helene Public Advisory Number 29

2018-09-14 16:40:58| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Fri Sep 14 2018 193 WTNT33 KNHC 141440 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

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Tropical Storm Helene Graphics

2018-09-14 16:40:42| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Fri, 14 Sep 2018 14:40:42 GMT Wind Speed Probabilities last updated Fri, 14 Sep 2018 15:28:23 GMT

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Tropical Storm Helene Forecast Advisory Number 29

2018-09-14 16:40:26| National Hurricane Center (Atlantic)

Issued at 1500 UTC FRI SEP 14 2018 919 WTNT23 KNHC 141440 TCMAT3 TROPICAL STORM HELENE FORECAST/ADVISORY NUMBER 29 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 1500 UTC FRI SEP 14 2018 CHANGES IN WATCHES AND WARNINGS 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/. TROPICAL STORM CENTER LOCATED NEAR 32.9N 36.3W AT 14/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH OR 10 DEGREES AT 20 KT ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT. 50 KT....... 60NE 60SE 60SW 40NW. 34 KT.......140NE 90SE 90SW 100NW. 12 FT SEAS..180NE 270SE 270SW 150NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 32.9N 36.3W AT 14/1500Z AT 14/1200Z CENTER WAS LOCATED NEAR 32.0N 36.5W FORECAST VALID 15/0000Z 35.5N 35.5W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 60NE 60SE 60SW 50NW. 34 KT...140NE 90SE 100SW 100NW. FORECAST VALID 15/1200Z 38.4N 33.4W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 50NE 60SE 60SW 50NW. 34 KT...130NE 110SE 110SW 110NW. FORECAST VALID 16/0000Z 40.7N 30.0W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 60SE 50SW 30NW. 34 KT...130NE 140SE 120SW 110NW. FORECAST VALID 16/1200Z 42.7N 25.7W...POST-TROP/EXTRATROP MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 60SE 50SW 20NW. 34 KT...130NE 150SE 130SW 110NW. FORECAST VALID 17/1200Z 47.4N 16.1W...POST-TROP/EXTRATROP MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 60SE 50SW 20NW. 34 KT...150NE 160SE 160SW 110NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 18/1200Z...ABSORBED BY FRONT REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 32.9N 36.3W NEXT ADVISORY AT 14/2100Z $$ FORECASTER ROBERTS

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