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. It typically moves forward at speeds of 10-15 m.p.h., but can travel as fast as 40 m.p.h. At its very early and weak stages it is called a Tropical Depression. When the winds reach 39 m.p.h. it is called a Tropical Storm. If the wind should reach 74 m.p.h. or more the tropical storm is called a Hurricane

to the 1980-2010 long-term average of 12. The most likely number of hurricanes predicted to occur in the North Atlantic during the June to November period is 9, with a 70% chance that the number will be in the range 4 to 14. This represents above normal activity relative to the 1980-2010 long-term

and had developed a clear, well-defined eye structure. Wind speeds were measured by the ASCAT satellite instrument* to be at Tropical storm intensity, sustaining winds of 55 knots (63 mph). The system soon lost its Hurricane-like appearance but went on to cause heavy rainfall and flooding over Greece

Office (June-issued) seasonal forecast for 2009 3.1 Observed tropical storm activity During July–November 2009, 9 tropical storms formed (of which 3 became hurricanes) with a total ACE index of 52.4. Thus in terms of ACE index the season was indeed the least active for over a decade, and the second

. By the second half of next week, Hurricane Kirk, which is currently in the Atlantic is introducing some uncertainty to the extended range forecast. Tony Wisson explains the challenges of the current forecast. He said: “Hurricane Kirk is currently in the tropical Atlantic. It is expected to move

. The indication for above-normal activity is consistent with the predicted evolution of ENSO to La Niña conditions by July 2010 and a continuation of the present above-normal sea surface temperatures (SSTs) in the tropical North Atlantic into the peak of the hurricane season. The dynamical prediction

for the vast majority, the eyes of forecasters are drawn west from Tuesday as Ex-Hurricane Erin is likely to exert some influence over the UK’s weather through the middle of next week. Met Office Deputy Chief Meteorologist Tony Wisson is assessing the medium-range forecast. He said: “There’s still a lot

, the weather for the remainder of the Olympics was characterised by very hot and dry conditions. Credits:  Image: © Crown copyright, Met Office; Data: EUMETSAT July 2024 - Hurricane Beryl 8 July 2024 Two simultaneous satellite views of Hurricane Beryl were captured at 13:30 UTC on 8th July, shortly

possible by the peak of the hurricane season. The estimates for June–November 2011: • a 4.7% chance of exceeding 19 storms (recorded June–November 2010). • a less than 1% chance of exceeding 27 storms (recorded June–November 2005). © Crown copyright 2011 Tropical Storm Outlook 02 Tropical Storm

Hurricanes, typhoons and tornadoes: What’s the difference? Author: Press Office 15 September 2025 With tropical storm season now underway, and Tropical Storm Mario continuing to move northwest in the Eastern Pacific, we're taking a look at hurricanes, typhoons and tornadoes, and what the differences