Convective Discussion:
A broad upper trough over Quebec is rotating down towards New Brunswick this afternoon. This may cause weak thundershowers, as there is some upper dynamic support However, the lower airmass is very dry, with 850 mb dewpoints near or below zero, and surface dewpoints generally less than 5 C over New Brunswick, Maine, and northwest towards the trough. For Nova Scotia, moisture levels are higher, with dewpoints near 10-13 C, and with afternoon highs into the low 20’s inland. There will also be some midlevel destatbilisation from cold advection ahead of the upper trough.
For offshore waters especially for the southeaster grand Banks, upper support and PVA ahead of an approaching cold front should give a few elevated thundershowers. thundershowers
Regional Impacts:
Newfoundland and Labrador: No significant chance for thundershowers.
Prince Edward Island: No significant chance for thundershowers.
Nova Scotia: Chance of non-severe thundershowers this afternoon into early this evening.
New Brunswick: Slight chance of non-severe thundershowers this afternoon into this evening.
Marine regions: Chance of non-severe thundershowers.
Doug Mercer
Lead Meteorologist
Atlantic Storm Prediction Centre
Meteorological Service of Canada
45 Alderney Drive, Dartmouth
Nova Scotia, B2Y 2N6
Office: (902) 426-9200
Premier Météorologue
Centre de prévision des intempéries de la région de l'atlantique
Service météorologique du Canada
45 promenade Alderney, Dartmouth
Nouvelle-Écosse, B2Y 2N6
Bureau: (902) 426-9200
Cell: (902) 403-7951