Convective Outlook Valid for Today and Tomorrow

Regional Impacts

None.

 

Convective Discussion

No thunderstorms expected today and Monday.

 

Thunderstorm Outlook for Day 1

 

Thunderstorm Outlook for Day 2

 

Jeremy

Convective Outlook Valid for Today and Tomorrow

Regional Impacts

Western LAB: isolated thunderstorms possible this afternoon.

 

Convective Discussion

A vigorous upper trough of low pressure will move into western Labrador this afternoon giving the risk of a thunderstorm. A stationary frontal trough over the southern Grand Banks will continue to give isolated thunderstorms today and Sunday. OTWX nil sig wx expected.

 

Thunderstorm Outlook for Day 1 day

 

Thunderstorm Outlook for Day 1 night

 

Thunderstorm Outlook for Day 2

 

Jeremy

Convective Outlook Valid for Today and Tomorrow

Regional Impacts:

 

Today

NB/NS/PEI/Labrador: None

NL: Isolated/embedded lightning east

 

Tonight

NS/NB/PEI/NL/Labrador: None

 

Saturday

NB/NS/PEI/NL/Labrador: None

 

Convective Discussion:

 

A slow moving trough of low pressure over the Avalon Peninsula will continue eastward today and will lie east of Newfoundland tonight. Some embedded/elevated lightning and downpours are occurring along and ahead of the trough. The trough will only affect offshore waters tonight and Saturday.

 

Thunderstorm outlook for today:

 

Thunderstorm outlook for tonight:

 

Thunderstorm outlook for Saturday:

Convective Outlook Valid for Today and Tomorrow

Regional Impacts:

 

Today

NB/NS/PEI: None

NL/Labrador: Isolated lightning and locally heavy downpours

 

Tonight

NS/NB/PEI/Labrador: None

NL: Isolated lightning and locally heavy downpours

 

Thursday

NB/NS/PEI/Labrador: None

NB/NS/PEI: Isolated lightning

 

Convective Discussion:

 

A slow moving trough of low pressure extending from a low over northern Quebec will advance eastward across Newfoundland and Labrador today and tonight. Ahead of the trough embedded lightning and downpours are occurring. Precipitable water values are in the mid 40s and rainfall warnings are in effect for the southern Newfoundland coast. Over western Labrador there is a risk of surface based lightning in the wake of the trough this afternoon. The CAPE and shear values are quite low so only small hail or wind gusts are likely there.

 

As the trough continues eastward on Friday there is a risk of thundershowers for eastern Newfoundland and associated waters.

 

Thunderstorm outlook for today:

 

 

Thunderstorm outlook for tonight:

 

Thunderstorm outlook for Friday:

 

 

 

 

 

 

 

 

 

Convective Outlook Valid for Today and Tomorrow

Regional Impacts:

 

Today

NB/NS/PEI: isolated lightning and locally heavy downpours

NL/Labrador: None

 

Tonight

Labrador/PEI/NS: isolated lightning and locally heavy downpours

NB/NL: None

 

Thursday

Labrador/NL: isolated lightning and locally heavy downpours

NB/NS/PEI: None

 

Convective Discussion:

 

A slow moving trough of low pressure extending from a low over central Quebec will advance eastward across the Atlantic region today into Thursday. This trough is pulling in a lot of moisture from the Gulf Stream, reaching far into northern Labrador with precipitable water values in the mid 40s. Convection is expected to remain isolated in nature as the air mass is quite warm at 500 mb over the Maritimes today and reaching further north and east towards Labrador and Newfoundland overnight and into Thursday, enhancing rainfall amounts. The western Maritime waters lie along the right entrance of a 120KT 250mb jet so the convection may remain mostly over the marine waters but an isolated strike cannot be ruled out further north.

 

As the trough continues eastward on Thursday, another short wave trough will move through western and central Labrador. CAPE values near 700 J/kg and some cooling aloft will prompt some convection in the afternoon. Effective shear will be too high (near 60Kt) to maintain any organized convection but anything that does develop could have some small hail.

 

Thunderstorm outlook for today:

 

Thunderstorm outlook for tonight:

 

Thunderstorm outlook for Thursday: