Regional Impacts
Today
Labrador: Isolated thundershowers over south-central Labrador this afternoon with some heavy downpours
NS/NB/PEI/NFLD: None.
Tonight
NS/NB/PEI/NFLD/LAB: None.
Tomorrow
Labrador: Isolated thundershowers over western Labrador in the afternoon with some heavy downpours
NS/NB/PEI/NFLD: None.
Convective Discussion…
Another quiet day is in store for Atlantic Canada as a ridge of high pressure builds in from the west. A 500 mb jet extends from northern Quebec into southwestern Nova Scotia this morning, however it is not expected to trigger any thunderstorm activity due to the approaching thermal ridge. Surface temperatures are expected to rise near 30 degrees Celsius this afternoon over much of New Brunswick and Nova Scotia, this combined with a lack of low level moisture should also help prevent any convection over the area today.
The main area to watch today will be in south-central Labrador where some isolated thundershowers could develop this afternoon, associated with some weak surface troughing and mid level cooling around the back side of an upper low over the southern Labrador Sea. The risk here however remains fairly low due to a lack of CAPE (less than 200 J/kg of mixed-layer) and fairly weak effective layer shear (10 to 20 kts), though some low level cloud cover this morning hints at just enough low level moisture to fire off a few weak thundershowers later today. The main risk with any thundershowers that do develop here today will be some brief heavy downpours of 5 to 10 mm.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
Forecaster: Copp