Regional Impacts…
Today
NB/NS: Risk of severe thunderstorms with heavy downpours, strong wind gusts and small hail.
PEI/Labrador: Chance of thunderstorms.
NL: None.
Tonight
NB/NS/PEI/NL/Labrador: Chance of thunderstorms.
Monday
NB/NS/PEI: Risk of severe thunderstorms with heavy downpours, strong wind gusts and small hail.
NL: Risk of severe thunderstorms with heavy downpours.
Labrador: Chance of thunderstorms.
Convective Discussion…
A slow moving upper low with a surface reflection persists over northern Quebec today. The associated cold front extends from southeastern Labrador into northern New Brunswick. Ahead of the front, dew points in the low 20C will continue today and into tomorrow. Shortwaves will move through the region today and tomorrow with weak troughing also helping to initiate convection. The following are occurring near and ahead of the front….CAPE values of 10000-2000 J/kg, precipitable water 40- 50 mm, shear near 30 kts. Over New Brunswick the slow moving front may produce severe weather however there is a lot of cloud which is leftover from previous convection in New England. This will potentially inhibit afternoon convection by suppressing the daytime high temperatures. Supporting the convection however is the favourable right entrance of a high level jet. Over Nova Scotia a weak surface trough moving up the Atlantic coastline may initiate convection.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
