Regional Impacts
NB: Isolated thundershowers possible over NW NB this afternoon. Locally heavy downpours of 10-15 mm.
NL: Isolated thundershowers possible over western Labrador this afternoon. Locally heavy downpours of 10-15 mm.
NS & PEI: None.
Convective Discussion…
A few areas of interest exist today, however no severe weather is expected. The first area is associated with a small, weak embedded upper low moving through the St. Lawrence river valley. This upper low will approach NW NB this afternoon bringing the chance for a couple isolated thundershowers. While SBCAPE values of around 750 J/kg are forecast, this number may be too high as extensive cloud cover is present over the area of interest. In addition, a lack of bulk shear (10-15 kts) should prevent any severe potential. As such, the main hazard with these cells will be locally heavy downpours of 10-15 mm.
The second area of interest is within an upper trough moving into western Labrador this afternoon. Although bulk shear values are forecast to increase to 30-40 kts this afternoon, meager CAPE values of 250-500 J/kg should keep convection non-severe, with the main risk being locally heavy downpours of 10-15 mm.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Copp