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Sunday, July 22, 2018

Day 1 Convective Outlook for Atlantic Canada Valid for July 22, 2018


Convective discussion:

High probability of thunderstorms in western and central Labrador. Heavy rain, gusty winds and possible hail would likely accompany these thunderstorms. There is a slight possibility of severe conditions.

Thundershowers will likely persist south of NS and NF with the southern Avalon remaining in the risk of non-severe thundershowers.

Technical Discussion:

CAPE values could exceed 1000J/kg in western Labrador. In addition, 0-6 km shear would be in the 40-50 knot range. Supercells and squall lines are possible.

Regional Impacts:

New Brunswick: Nil

Nova Scotia and Prince Edward Island: Nil, except a very slight risk northern mainland NS if a period of prolonged sunshine occurs this afternoon.

Newfoundland: Chance of a thundershower on the Avalon.

Labrador: Likely.