Regional Impacts
Scattered to widespread thundershowers are expected across NB later today and overnight tonight across Fundy shores. Some storms near Grand Falls and the Trans-Canada Highway over western NB could reach severe limits due to hail and heavy rain (and wind gusts). Severe storms are expected to be quite isolated. The general thundershowers will extend across the Northumberland and Gulf marine regions.
Convective Discussion
The frontal analysis today is complex. A trailing cold front across eastern Labrador may spawn a few lightning strikes today. Another cold front currently located over the St. Lawrence river approaching the Gaspe peninsula will act as a trigger this afternoon for storms in NB and western PEI. Storms near the American border will have decent jet support, and 0-6k shear over 35kts. Moderate hail is possible *IF* a discrete cell can form in a clearing of the prevailing cloudy skies. Overnight, this trough-ing will force embedded thunderstorm development along Fundy shores and western NS. On Saturday, this instability becomes quite widespread across Atlantic Canada with rain being the main hazard. Sunday brings in stabilizing conditions throughout the day.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Thunderstorm Outlook for Sunday
Forecaster: Tirone.