Thunderstorm Outlook for Day 1 – July 25th, 2021
Regional Impacts
None during the day. Showers are moving into western New Brunswick early this afternoon. There is a slight risk for a thundershower this evening over northwestern New Brunswick and western Nova Scotia early Monday morning.
Convective Discussion
A trough over central Quebec extending southward into New England will progress eastward today while a ridge of high pressure lies over Newfoundland and Labrador today. Showers associated with the warm front will move into western New Brunswick this afternoon. Upper dynamics remain west of the Maritimes today. However, behind this area of showers, there is the possibility of convection in the warm air mass this afternoon over southern Quebec and Maine. A weak low-level jet over Maine may help to maintain convection into northwestern New Brunswick this evening. Some elevated convection is also possible overnight over the Maritimes western marine district.
Thunderstorm Outlook for Day 2 – July 26th, 2021
As the warm front pushes through overnight into Monday morning, moisture is expected to increase in the warm sector. A short-wave trough is expected to track over Maine and into New Brunswick on Monday. With increasing instability and 0-6km shear near 35KT over southern New Brunswick and parts central/northern Nova Scotia, there is the possibility storms to develops with strong wind gusts along with localized heavy rain.
