Thunderstorm Outlook for Today
Regional Impacts:
Over extreme southeastern Labrador and Newfoundland (except for the southwest and southeast), there is a risk of a popup thundershower today. Small hail is possible due to the low freezing levels even though the thundershowers are expected to be weak.
Convective Discussion
A deep layer trough from the surface to 250 mb extends from eastern Labrador to western Newfoundland. The upper and mid levels are very cold (freezing levels are 4500 – 5000 feet). With daytime heating, there may be isolated popup thundershowers near and east of the trough. Shear values are low (less than 30 knots). West of the trough, the environment is strongly capped near 700 mb and the low levels are dry. Thundershowers are very unlikely west of the trough. A strong upper level jet over 100 knots exists to the south of Newfoundland. This jet is too far south to affect convection over land areas.
This deep layer trough is expected to move to the east of Newfoundland and Labrador tonight and Monday. No thundershowers are expected tonight and Monday over Atlantic Canada.
Thunderstorm Outlook for Today:
Thunderstorm Outlook for Monday: None expected.