An early morning FROPA


westatlantic-radar-2013-12-28-0523
Bermuda Weather Service Radar imagery as of 5:23am December 28th 2013.

Troughiness on Friday led to a dreary day with showers, drizzle, low clouds and high humidity for much of the day. That messy weather was pushed away as a cold front passed the island in the pre-dawn hours this morning. At around 5:10am local time, a sharp wind shift from west to north signaled frontal passage. However, the radar presentation for this front may have belied its location. Only a poorly defined band of moderate showers embedded in a shield of light to moderate rain.

In the wake of this morning’s front, showers of light rain and drizzle with strong northerly to north-northeasterly winds and cooler temperatures were the theme. The front, weak to begin with, fell further apart as it passed the island. However, with the front now becoming stationary to the southeast of the island, cool air remained in place with these northerly winds. However, a weak trough to the southeast of the island began to send moisture over this shallow layer of cool air on north easterly winds aloft and this led to today’s dreary conditions.

See official weather forecasts, observations, warnings, and analysis for Bermuda at the Bermuda Weather Service.

NASA TERRA MODIS imagery today, with my analysis showing a cold front in blue, extending into a stationary front in blue and red, a trough in yellow, cool air streamline segments in blue at the surface, and warm air streamline segments in pink just above the surface.
NASA TERRA MODIS imagery today, with my analysis showing a cold front in blue, extending into a stationary front in blue and red, a trough in yellow, cool air streamline segments in blue at the surface, and warm air streamline segments in pink just above the surface. Bermuda is marked by a red dot.

 

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