Weather Briefing for Today

The three H's rule is in full effect today with hot temperatures in the 80s and 90s across New England and Eastern NY.  A Stationary front, which is the boundary of the warm Air mass over much of the country and the cool Canadian Air is located over Northern Maine  and southern Quebec.  A batch of heavy showers and rain is currently moving into Northern Maine, with another batch of moisture north of Montreal.  Isolated to Scattered showers and storms are possible along this boundary.  A few of the storms could be severe.   Convective Available Potential Energy (CAPE) is very limited with values below a 1000 J/Kg  for most of the area.   The Lifted Index, which measures the chance of thunderstorm development is near zero for most, with  parts of Eastern NY and Western VT having values of -2 to -3.  There needs to be sunlight in order to bring instability to the area. The Cape value needs to be higher for any Thunderstorm development.  The Lifted Index needs to be lower for thunderstorm development.  The area of the best chance of storm development is Northern New England.

-SPC