Regional Impacts
Slight risk of a thundershower this afternoon over southeastern Labrador.
Risk of a thunderstorm for NW New Brunswick Tuesday late afternoon and evening.
Convective Discussion
As an upper trough moves into western Labrador this afternoon, daytime heating (inland temperatures into the mid 20s) and convergence ahead of the trough could help trigger an isolated CB over southeastern Labrador this afternoon. Some strong convective gusts are possible, however, increasing shear above 50kt may shear off any developing TCUs. Moisture is also only low to moderate with precipitable water less than 20 mm.
A ridge of high pressure dominates south of the Maritimes today while an upper warm front weakens as it tracks into the southwestern Maritimes this afternoon and tonight.
A trough approaches New Brunswick tomorrow and there is a risk of a thunderstorm reaching northwestern areas by the late afternoon or early evening. Although there is good thermodynamic potential with daytime highs reaching 30C, there is increasing warmth in the lower to mid layers may cap convection.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Roberta McArthur