Regional Impacts
Today
NB: Chance of an isolated thundershower within a greater area of showers in central and southern NB this afternoon and evening. Main hazard is simply lightning.
LAB/NFLD: Chance of scattered thunderstorms over parts of Labrador today, and Nfld. Heavy downpours are possible.
Tonight
Gulf of St. Lawrence waters: Slight chance of an isolated thunderstorm cell to develop in the late evening and carry into the overnight hours.
Western Labrador: Isolated non-severe thundershowers possible before noon on Thursday, in area of showers.
Tomorrow
Atlantic Canada: Chance for numerous embedded thunderstorms with locally heavy downpours and potentially a few gusty winds.
Convective Discussion…
A persistent trof line continues to affect Labrador and Nfld today, bringing the chance of a few thundershowers. These cells will have ample moisture to work with, but not much lift in comparison. The prevailing cloud deck is the competition. Over the Maritimes, parts of NB are forecast to destabilize this afternoon (according to the high resolution model suite). Again, the storms have limiting CAPE today.
Tomorrow is looking to be a different story. The atmosphere is forecast to moisten even further in the next 24hrs – bringing Pwats on the Atlantic coast of NS up to 35 by tmrw morning. Thunderstorms that develop tomorrow within the broader precip field will enhance local rainfall totals further. This will be monitored closely (Rain Rates already being flagged near 30 to 40 mm/h). Some early day cells could also bring gusty winds if they can get into clearer skies, before the storm mode becomes clustered.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Forecaster: Tirone.