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reaches tropical storm status. 2. Tropical cyclone activity Tropical cyclone activity SWI AUS SAT TOTAL Tropical depressions (<35 knots) 0 (0) 0 (0) 0 (0) 0 (0) Tropical storms (35-63 knots) 5 (7) 12 (6) 1 (1) 18 (14) Hurricanes/typhoons (>63 knots) 6 (4) 10 (8) 0 (0) 16 (12) Total 11 (11) 22 (14

] (dispersion modelling) Meteoalarm (European warnings information service) Atmospheric pollution service Advice to Government Hurricane Season Forecasts Crisis Area Modelling International support services (briefing to UK government) Global Guidance Unit Services (GGU) (Global Operational forecast

on the frequency of intense Atlantic hurricanes. Science, 327:454–458, 2010. L Bengtsson, K Hodges, M Esch, N Keenlyside, L Kornblueh, J-J Luo, and T Yamagata. How may tropical cyclones change in a warmer climate? Tellus A, 59(4):539–561, 2007. JN Brown, C Langlais, and AS Gupta. Projected sea surface

storms during the whole Atlantic season (taken from the US National Oceanic & Atmospheric Administartion National Hurricane Center http://www.nhc.noaa.gov) over the period 1993-2006. Verification of SST predictions As discussed previously, North Atlantic tropical storm frequencies are correlated

reaches tropical storm status. 2. Tropical cyclone activity Tropical cyclone activity SWI AUS SAT TOTAL Tropical depressions (<35 knots) 0 0 0 0 Tropical storms (35-63 knots) 7 6 1 14 Hurricanes/typhoons (>63 knots) 4 8 0 12 Total 11 14 1 26 Basin name abbreviations: SWI : South-West Indian (west

overall with notable events including storm Callum in October, that resulted in significant flooding. In the Atlantic, Hurricane Leslie recorded the longest path of a hurricane over its 22-day existence. DR informed the group about Met Office performance for winter 2018 so far. Forecast performance

2 , equivalent to three months rainfall. Weather data The image below shows the Met Office shipping forecast issued for Biscay on the evening of 1 October 2020, with a hurricane force 12 warning for this area as storm Alex rapidly deepened to the west of Brittany. 1 Storm Alex was named by Meteo

wind strength violent storm 11, perhaps hurricane force 12 later. The chart below shows hourly mean sea level pressure recorded at Culdrose (Cornwall), Hurn (Dorset), St Catherine’s Point (Isle of Wight), Kenley Airfield (Greater London) and Wattisham (Suffolk). These show the sharp drop and rise

‘Significant’ impacts from Tropical Storm Debby in United States – will it influence UK weather? Author: Press Office 6 August 2024 Tropical Storm Debby – which made landfall in northern Florida on Monday as a hurricane – will continue to impact eastern and southeastern parts of the United States

/government/international-development Climate Outlook Fora (WMO Factsheet), including: CariCOF Hurricane information https://www.nhc.noaa.gov/ 2025 Hurricane season forecast Climate Outlook Global: March to December Supplemental Information 24 Technical notes The WMO lead centre for long-range forecast multi