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A cut-off upper (500mb/30,000 feet) low continues to spin over the Eastern U.S. with a weak surface low that has moved onshore of N. Carolina. No tropical threat since the low has moved inland. Heavy rain will pinwheel onshore of N. Carolina & Virginia through Wed. night.
Meanwhile... a good deal of Saharan dust (6th image below) is over the Central & Eastern Atlantic. Such large dust clouds are quite typical for June & July & is indicative of generally dry mid & upper level air which usually inhibits tropical development. However, I’ve seen tropical systems thrive just outside the dust cloud ... or once away from the dusty atmosphere... so it’s not a “shoe in” that there will be no tropical development just because a lot of dust exists. Other factors have to be considered such as the overall shear values across the Atlantic Basin, general vertical motion values & sea surface temps.
In general at this time ... the Basin looks to remain quiet into next week.
2020 names..... “Dolly” is next on the Atlantic list (names are picked at random by the World Meteorological Organization... repeat every 6 years... historic storms are retired (Florence & Michael last year) & Dorian is certain to be retired from the ’19 list....
Mid & upper level wind shear (enemy of tropical cyclones) analysis (CIMMS). The red lines indicate strong shear of which there is plenty across most of the Atlantic at the moment:
Water vapor imagery (dark blue indicates dry air):
Deep oceanic heat content is extreme over the NW Caribbean:
Sea surface temp. anomalies:
SE U.S. surface map:
Surface analysis centered on the tropical Atlantic:
Surface analysis of the Gulf:
Global tropical activity:
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