Regional Impacts
Today
NB: Chance of some scattered embedded thundershowers over southern New Brunswick this afternoon and evening with some locally heavy downpours.
Lab: Chance of scattered/frequent thunderstorms through southern Labrador today. These could be marginally severe with gusty winds and heavy downpours (locally).
NS: Scattered embedded thundershowers over most of mainland NS this afternoon and evening. Rain is the biggest hazard.
Tonight
NS: Thunderstorms continue over eastern sections as well as much of the marine district.
Tomorrow
NB: Thunderstorms are forecast to develop late afternoon and early evening. Severe storms are possible along and south of Highway 2, with gusty winds and moderate hail.
Convective Discussion
Labrador has lit up quite quickly today with lightning across the southern tier. These storms (spawning from a low centre anchored way back to the west) have a lack of a dominant steering flow and so they could drop quite a bit of rain locally. Elsewhere across the southern Maritimes, an embedded TS risk exists within the broader precip shield that has enveloped the region. Later this afternoon, greater jet support advances east from New England and should create enough lift and charge separation to spark more lightning. Dewpoints remain fairly high near 15 at the noon hour. CAPE is relatively low today given the setup - so severe hazards are not forecast. Tomorrow is a different story across NB. The freezing levels will be much lower creating a possible hail-favoured setup. Additionally, if organized cells do form, they will bring an inherent wind risk. G90 are possible and are depicted by the yellow hazard area. This severe weather risk will be re-analyzed and potentially alerted for on Wednesday.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Forecaster: Tirone.