Category: Coastal South Carolina

SAL-ty Atlantic: The Saharan Air Layer

by WeatherFlow meteorologist Shea Gibson 6/25/14 See part II of this series here: http://blog.weatherflow.com/sal-ty-atlantic-the-saharan-air-layer-part-ii/ See part III of this series here: http://blog.weatherflow.com/sal-ty-atlantic-part-iii/ The “Dusty Tongue” of the Sahara keeps the northern ITCZ and Eastern Caribbean dried out through June 2014. The Saharan Air Layer, or SAL, is fed by Easterly mid-level jetting over the deserts of Africa…

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Tricky Mesoscale Convective Vortex (MCV) attempts to spark tropical development off of SC.

by WeatherFlow meteorologist Shea Gibson   Upon doing the forecast in the AM 6/6/14, I noticed what looked similar to a derecho having larger scale rotation. Overnight warm front activity/warm air advection just south of an EAST-WEST stationary boundary typically sparks clusters of storms but usually not in this pattern. In fact, this MCV managed…

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Anatomy of lee-side trough/piedmont trough, convergence zone and fairly solid regional Sea Breeze all put together.

…by WeatherFlow meteorologist Shea Gibson 6-6-14 Ingredients for a near-perfect Sea Breeze in the Southeast. June 3 – June 5 we saw a moderate Sea Breeze build all along the SE coast, with June 4 being very consistent all day and into the night, where nocturnal jetting kept the higher numbers through Thursday AM. Two…

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Sea Breeze Undercuts Along the SC coast May 4th and 5th 2014

   Synoptic Setup 5/4/14 High pressure centered over the northern Gulf of Mexico. Cold front departing well offshore. Synoptic gradient flow is fairly zonal W/WNW. Air in place over the region is unseasonably dry. Strong surface heating produced 90F temps inland.   Observations at fort sumter Classic afternoon reversal of synoptic offshore flow was correctly…

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Piedmont Trough increases the Sea Breeze along the SC/NC coast 5/27/14.

By WeatherFlow meteorologist Shea Gibson Tuesday, May 27 showed an interesting setup with lee-side troughing converging with piedmont trough that developed during diurnal heating. The mid state areas, with their respective sandhills and clays/loams, gave rise to mid state circulations that enhanced the gradient during Sea Breezing. A dual core High started the day out,…

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Cannonball Jellyfish signify the end of marine layering along SC coast?

by WeatherFlow meteorologist Shea Gibson 5/6/14 Seems weird doesn’t it that we can get a visual on Sea Surface Temp’s reaching certain values from a migrating jellyfish? Observed over the weekend were Cannonball Jellyfish on the beach ,which typically live in waters at or near 73.6°.  Seems uninteresting to say the least, but these random blobs…

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Subtropical Ridging effects in the SE Region.

by WeatherFlow meteorologist Shea Gibson From April 11 – April 14, High pressure entered from the Gulf, expanded across FL/GA and out into the Atlantic north of Bermuda, where it slightly built around the center and then became flattened by two areas of troughing to the north and south. To the north, a stronger frontal…

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