Thunderstorm Outlook valid for JULY 27th:
Regional Impacts
Isolated non-severe thunderstorms along an advancing frontal feature across the Avalon early today. Additional isolated non-severe thundershowers are possible in the interior of Nfld as air mass modifies slowly.
Convective Discussion
The main forcing is the broadly sweeping cold front that continues to trundle eastwards. Directly behind the front remains slightly unstable so in clear skies a pop up shower is possible later this afternoon. Dynamics are not favourable for any significant hazards other than lightning. Across Labrador, there is a strong thermal cap at 700mb and it is quite dry in mi-levels. Low-cloud will also create quite a hindrance. Across the Maritimes, this 700mb cap is even stronger as can be easily deciphered on Caribou and Yarmouth’s soundings this AM. Stable, sunny, relatively dry conditions are the Wednesday forecast here. No TS risk tonight.
Thunderstorm Outlook for Day 1
Thunderstorm Outlook for Night 1
Thunderstorm Outlook valid for JULY 28th:
Northern tier of New Brunswick, largely terrain driven, will de-stabilize slightly adding the risk of late afternoon pop-up showers and thunder. Severe hazard criteria is not expected to be met by these single-cell storms. Skinny CAPE values at best are near 300J/kg, with minimal shear in the background environment.
Thunderstorm Outlook for Day 2
Forecaster: TIRONE