High altitude hostility suppressing tropical development
Wednesday 7th August 2019
Disturbance Twenty One is losing the fight with upper level shear in the south-central Caribbean, moving west at 16 knots. This has some thunderstorm activity associated with it but is not expected to last beyond the next day or so.
Disturbance Twenty Three is centred around 250 miles north east of Puerto Rico moving west-nor'west at 10 knots. This also has some disorganised thunderstorm activity associated with it but being battered by south-westerly wind shear and not expected to develop.
Disturbance Twenty Two is about a day east of the Lesser Antilles moving west at a brisk 21 knots. This is trying to organise and in so doing, also producing scattered thunderstorms but will succumb to a hostile environment and development is not expected.
Disturbance Twenty Four has just left the African coast. This is in fine shape, with some impressive surface rotation and is producing numerous showers and thunderstorms. Normally, this would have the storm enthusiasts salivating but even the Canadian guy can see this being zapped by high altitude hostility in the shape of dry, falling air.