06-18-2008, 05:37 PM
Looks as though the upper level low that has dogged eastern Canada for a while looks set to stick around a few more days. It has brought grey skies and cool(ish) temperatures for many all the way from southern ON through to the Atlantic provinces, plus a deluge of rain around the periphery particulary in the US.
With such an unstable environment, any amount of afternoon heating or lift (from a front/trough) can spark up some impressive downpours and thunderstorms, the upper level conditions are quite favourable for hail too.
There signs toward the end of the medium range model runs that a ridge begins to build in the southeast, with the upper low eventually lifting out north east. Eastern most maritime provinces could see a warming trend for this weekend as the heights to the east build and a southerly flow develops through NS.
With such an unstable environment, any amount of afternoon heating or lift (from a front/trough) can spark up some impressive downpours and thunderstorms, the upper level conditions are quite favourable for hail too.
There signs toward the end of the medium range model runs that a ridge begins to build in the southeast, with the upper low eventually lifting out north east. Eastern most maritime provinces could see a warming trend for this weekend as the heights to the east build and a southerly flow develops through NS.