( cyclocane is a CYCLOne and hurriCANE tracker by hayley )
This is the final warning / advisory for this storm as it has weakened below warning levels and/or the storm system is no longer a tropical cyclone.
Current Wind Speed 45 knots / 50 MPH
Max Predicted Wind Speed 50 knots / 60 MPH at
Spaghetti models for HELENE can be found here:
464 WTNT33 KNHC 161442 TCPAT3 BULLETIN Post-Tropical Cyclone Helene Advisory Number 37 NWS National Hurricane Center Miami FL AL082018 1100 AM AST Sun Sep 16 2018 ...HELENE NOW A POST-TROPICAL CYCLONE... ...THIS IS THE LAST ADVISORY... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...43.8N 25.7W ABOUT 405 MI...655 KM N OF THE AZORES MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NE OR 55 DEGREES AT 29 MPH...46 KM/H MINIMUM CENTRAL PRESSURE...989 MB...29.21 INCHES WATCHES AND WARNINGS -------------------- SUMMARY OF WATCHES AND WARNINGS IN EFFECT: None. Interests in Ireland and the United Kingdom should consult products from their local meteorological service for information about potential impacts from Post-Tropical 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 Post-Tropical Cyclone Helene was located near latitude 43.8 North, longitude 25.7 West. The post-tropical cyclone is moving toward the northeast near 29 mph (46 km/h), and this motion is expected to continue with an increase in forward speed during the next 24 hours. On the forecast track, the post-tropical cyclone will approach Ireland and the United Kingdom on Monday. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Some slight strengthening is possible today. Some weakening is expected by Monday, and the system is forecast to be absorbed by another low pressure area by early Tuesday. Tropical-storm-force winds extend outward up to 230 miles (370 km) from the center. The estimated minimum central pressure is 989 mb (29.21 inches). HAZARDS AFFECTING LAND ---------------------- Information on rainfall and wind forecasts for Ireland can be found in products issued by Met Eireann at www.met.ie and for the United Kingdom in products issued by the United Kingdom Met Office at www.metoffice.gov/uk. SURF: Swells generated by Helene are affecting portions of the Azores. These swells are likely to continue for another day or so and could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on this system. Additional information on this system can be found in High Seas Forecasts issued by Meteo France under WMO header FQNT50 LFPW and available on the web at: http://www.meteofrance.com/previsions-meteo-marine/bulletin. Additional information can also be found in High Seas Forecast issued by the UK Met Office under WMO header FQNT21 EGRR and on the web at: http://www.metoffice.gov.uk/public/weather/marine-high-seas/. $$ Forecaster Brown
Public Advisory not available for this storm.
413 WTNT43 KNHC 161443 TCDAT3 Post-Tropical Cyclone Helene Discussion Number 37 NWS National Hurricane Center Miami FL AL082018 1100 AM AST Sun Sep 16 2018 Helene's cloud pattern has transformed into that of an extratropical cyclone, with a large area of cold cloud tops located well to the north and northwest of the center. An ASCAT pass that caught the eastern portion of the circulation revealed maximum winds of 40 to 45 kt, therefore the initial wind speed remains 45 kt for this advisory. The global models suggest that the system will strengthen slightly today due to baroclinic processes, and this is reflected in the official forecast. Weakening is anticipated by late Monday, and the system is forecast to be absorbed by a larger low pressure to the northwest of the United Kingdom by Tuesday morning. The cyclone is moving quickly northeastward or 055/25 kt. Now that the system is embedded within the mid-latitude westerlies, a northeastward motion with some additional increase in forward speed is expected over the next day or so. The global models remain in good agreement on the track of the post-tropical low, and the new official forecast is an update of the previous advisory. This is the last NHC advisory on this system. Interests in Ireland and the United Kingdom should consult products from their local meteorological service for information about potential impacts from the post-tropical cyclone. 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 16/1500Z 43.8N 25.7W 45 KT 50 MPH...POST-TROPICAL 12H 17/0000Z 45.8N 21.2W 50 KT 60 MPH...POST-TROP/EXTRATROP 24H 17/1200Z 49.0N 14.8W 50 KT 60 MPH...POST-TROP/EXTRATROP 36H 18/0000Z 52.8N 6.2W 40 KT 45 MPH...POST-TROP/EXTRATROP 48H 18/1200Z...ABSORBED $$ Forecaster Brown
|45 knots||43.8, -25.7||translation missing: en.POST-TROPICAL|
|50 knots||45.8, -21.2||POST-TROPICAL CYCLONE|
|50 knots||49.0, -14.8||POST-TROPICAL CYCLONE|
|40 knots||52.8, -6.2||POST-TROPICAL CYCLONE|
|0 knots||translation missing: en.ABSORBED|
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