Regional Impacts
TODAY
Nfld: Scattered strong thunderstorms with high mid-level moisture leading to pockets of heavy rain. Hazards – heavy rain. This weather is expected on the heels of this morning’s initial round of precipitation.
Labrador: Isolated chance of a lightning strike or 2 along deformation zone.
TOMORROW
NB+NS+PEI: Thunderstorms approaching severe limits are expected late in the day and into the overnight hours. Hazards – gusty winds, heavy rain, small hail.
Convective Discussion
Strong thunderstorms continued as forecast in the overnight hours for Gulf waters, the Magdalen Islands, and Nfld. This initial wave of weather has passed to lie offshore of Nfld. Convection is expected to spark up again in partial clearing across interior areas along a jet streak that has a history of producing tops to 19,000ft and heavy rain. Pwats remain near 40mm on this AMs soundings. The max vil of the day in the RDPS is 45. Decent agreement there. Storms will be fast moving, with moderately high shear, so precip amounts should not exceed this maximum in any one location. DAY 2 is a bit more complex as favourable dynamics approach the Maritimes from the west. Sunday will start out very calm, but by late evening, severe weather is possible. Storms will mainly be rain makers, but small hail and gusty winds are also possible. Details will be added to tomorrow’s progs on the exact hazards and locations expected.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for SUNDAY (noon-midnight)
Forecaster: TIRONE