Period: 8:00am (December 10th) until 8:00am (December 11th)
A very cold Sunday night was the highlight of the summary period, with nighttime temperatures dropping to a low of 22.1°C. This was attributed mainly to lingering cold air associated with a dissipating shear line (once associated with a cold front that migrated from North America) which impacted the southern Lesser Antilles. Additionally, clear skies due to increasing subsidence overhead, and light winds (becoming calm at times) caused by a weak pressure gradient allowed for greater radiation cooling at nighttime.
Besides the cold Sunday night, the weather was generally fair with few partly cloudy spells throughout the summary period. A maximum temperature of 30.3°C was recorded with relative humidity averaging the low 70s during the daytime, while averaging 90s at overtime. The winds were generally NE’ly – E’ly @ 5-15mph becoming variable to calm at times with horizontal visibility in the excess of 20km.
Finally, a marine advisory was maintained due to sea swells associated with the dissipating shear line.
Valid: 8:00am (December 11th ) to 8:00pm (December 12th)
Model guidance points towards a continued dry atmosphere over the forecast area, as subsidence associated with deep layered ridging continues to dominate the area. No significant change is expected in the weather during the outlook period, with weather conditions remaining generally fair to partly cloudy.