There has been an increase in the moisture in the Caribbean. An upper air trough of Lower Pressure is forming as shown in the lower left image. An increase in convection is expected over the next few days. The Sahara air off Africa is weakening.
Polar Circulation update: The CW High Pressure is dominating again and has rotated back again towards the North Pole. Now centered at 75.8 N / 100.8 W. A strong active cold front is pushing down from Canada. Severe weather warnings issued.