Convective Outlook Valid for Today , Tonight and Tomorrow

Regional Impacts

Isolated thundershowers over a portion of the southern GB today.

 

Tonight and Tuesday offers the potential for waterspouts for a good portion of the Gulf of St. Lawrence and into southern Gulf-Port au Port.

 

Convective Discussion

A weak frontal wave will give isolated thunderstorms today over a portion of the southern Grand Banks today. A fairly cold upper trough will be moving down from Quebec and Labrador tonight and Tuesday that will create favourable conditions for non-tornadic waterspouts for a good chunk of the GLFSTLAWR and into the Port au Port Peninsula area.

 

OTWZ nil sig wx xpctd.

 

Thunderstorm Outlook for Today

 

Thunderstorm Outlook for Tonight

 

Thunderstorm Outlook for Tomorrow

 

Jeremy

Convective Outlook Valid for Today , Tonight and Tomorrow

Regional Impacts

Risk of a thunderstorm in western LAB, NW NB and SW NS later today.

 

Risk of thundershowers tonight along most of the ATL coast of NS.

 

Risk of thundershowers later today and tonight over the SRN GB.

 

Convective Discussion

3 separate features evident in SAT imagery: one being a weak surface low southeast of MRTM waters that will move up and over the southern GB later today and tonight giving the risk of thundershowers. The second feature will be an approaching cold frontal trough that is currently in Quebec. This will likely produce isolated thunderstorms upstream today, with the chance that one or 2 cells survive and make it to far western LAB and NW NB. Gusty winds and brief downpours are possible. The 3^rd feature will be a surface trough that is currently sliding towards NS. There is a chance of some late day and overnight thundershowers associated with it near Atlantic coastal NS. However there is no history with this so confidence on that happening is on the low side. Locally heavy downpours would be the only concern.

 

Thunderstorm Outlook for Today

 

Thunderstorm Outlook for Tonight

 

Thunderstorm Outlook for Tomorrow

 

Jeremy