je.st
news
Tag: helene
Summary for Tropical Storm Helene (AT3/AL082018)
2018-09-14 13:33:24| National Hurricane Center (Atlantic)
...HELENE ACCELERATING NORTHWARD... ...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS WEEKEND... As of 8:00 AM AST Fri Sep 14 the center of Helene was located near 31.9, -36.7 with movement N at 23 mph. The minimum central pressure was 992 mb with maximum sustained winds of about 65 mph.
Tags: summary
storm
tropical
tropical storm
Tropical Storm Helene Public Advisory Number 28A
2018-09-14 13:33:24| National Hurricane Center (Atlantic)
Issued at 800 AM AST Fri Sep 14 2018 746 WTNT33 KNHC 141133 TCPAT3 BULLETIN Tropical Storm Helene Intermediate Advisory Number 28A NWS National Hurricane Center Miami FL AL082018 800 AM AST Fri Sep 14 2018 ...HELENE ACCELERATING NORTHWARD... ...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS WEEKEND... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...31.9N 36.7W ABOUT 725 MI...1165 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: 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, 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 800 AM AST (1200 UTC), the center of Tropical Storm Helene was located near latitude 31.9 North, longitude 36.7 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 complete advisory at 1100 AM AST. $$ Forecaster Roberts
Tags: number
public
storm
advisory
Tropical Storm Helene Graphics
2018-09-14 10:54:56| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 14 Sep 2018 08:54:56 GMT Wind Speed Probabilities last updated Fri, 14 Sep 2018 08:54:56 GMT
Tags: graphics
storm
tropical
tropical storm
Tropical Storm Helene Forecast Discussion Number 28
2018-09-14 10:52:54| National Hurricane Center (Atlantic)
Issued at 500 AM AST Fri Sep 14 2018 163 WTNT43 KNHC 140852 TCDAT3 Tropical Storm Helene Discussion Number 28 NWS National Hurricane Center Miami FL AL082018 500 AM AST Fri Sep 14 2018 Helene is looking increasingly like an extratropical cyclone, with a rain shield extending from its northwest quadrant and a line of clouds to the southeast, probably associated with a convergence zone, that looks like a developing a front. However, earlier ASCAT data suggested that the cyclone still had a compact wind field with maximum winds of around 55 kt on the west side, and the most recent available AMSU data still showed a distinct warm core. The extratropical transition (ET) process will likely be completed within the next 48 h, around the time that Helene will likely pass near or over the Azores. While this process occurs, little weakening is forecast by the various dynamical models, but gradual weakening should occur once ET is completed. By the end of the forecast period, nearly all of the global models depict the cyclone being absorbed into a larger mid-latitude low pressure system over the far northeast Atlantic. Helene continues to accelerate northward, and the initial motion is 010/20 kt. Almost no change has been made to the track forecast. Helene is still forecast to move quickly northward to north-northeastward between a mid-level ridge to its east and a sharp mid-latitude trough to its west. A northeastward turn should occur over the weekend as Helene reaches the northern extent of the ridge and becomes embedded within the mid-latitude westerlies. The official track forecast remains near the various consensus aids. The government of Portugal has issued an orange wind warning for the Azores, equivalent to a tropical storm warning. Tropical Storm conditions with gusty winds and heavy rains are likely over the weekend as Helene passes the islands, regardless of whether the cyclone is a tropical storm or post-tropical. Helene is expected to be a post-tropical cyclone when it approaches Ireland and the United Kingdom in a few days. Interests in those locations should consult products from their local meteorological service for information about potential impacts from Helene. 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/. FORECAST POSITIONS AND MAX WINDS INIT 14/0900Z 30.6N 36.0W 55 KT 65 MPH 12H 14/1800Z 33.4N 35.3W 55 KT 65 MPH 24H 15/0600Z 36.7N 33.8W 55 KT 65 MPH 36H 15/1800Z 39.3N 30.8W 55 KT 65 MPH 48H 16/0600Z 41.3N 26.9W 50 KT 60 MPH...POST-TROP/EXTRATROP 72H 17/0600Z 45.5N 17.7W 50 KT 60 MPH...POST-TROP/EXTRATROP 96H 18/0600Z 51.5N 8.0W 45 KT 50 MPH...POST-TROP/EXTRATROP 120H 19/0600Z...DISSIPATED $$ Forecaster Zelinsky
Tags: number
discussion
storm
tropical
Tropical Storm Helene Wind Speed Probabilities Number 28
2018-09-14 10:52:24| National Hurricane Center (Atlantic)
Issued at 0900 UTC FRI SEP 14 2018 347 FONT13 KNHC 140852 PWSAT3 TROPICAL STORM HELENE WIND SPEED PROBABILITIES NUMBER 28 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 0900 UTC FRI SEP 14 2018 AT 0900Z THE CENTER OF TROPICAL STORM HELENE WAS LOCATED NEAR LATITUDE 30.6 NORTH...LONGITUDE 36.0 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 55 KTS...65 MPH...100 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 06Z FRI AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z FRI 18Z FRI 06Z SAT 18Z SAT 06Z SUN 06Z MON 06Z TUE PERIODS TO TO TO TO TO TO TO 18Z FRI 06Z SAT 18Z SAT 06Z SUN 06Z MON 06Z TUE 06Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT SANTA CRUZ AZO 34 X 11(11) 71(82) 2(84) 1(85) X(85) X(85) SANTA CRUZ AZO 50 X X( X) 45(45) 6(51) X(51) X(51) X(51) SANTA CRUZ AZO 64 X X( X) 8( 8) 3(11) X(11) X(11) X(11) PONTA DELGADA 34 X X( X) 9( 9) 9(18) X(18) X(18) X(18) $$ FORECASTER ZELINSKY
Sites : [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] next »