Regional Impacts
NB
Today…Risk of severe thunderstorms late in the day - heavy rain and strong wind gusts (and some hail)
Thursday… Scattered thunderstorms - heavy rain, strong wind gusts (and some hail)
NS
Today…risk of a non-severe thunderstorm late this afternoon
Thursday… Scattered thunderstorms - heavy rain, strong wind gusts (and some hail)
PEI
Today…risk of non-severe thunderstorms, except for northern Prince county where strong wind gusts are possible late in the day
Thursday… Scattered thunderstorms - heavy rain, strong wind gusts (and some hail)
Labrador
Today…Numerous strong thunderstorms with strong wind gusts, heavy rain (and some hail)
Thursday…Isolated thunderstorms - heavy rain, strong wind gusts
NF
Today…isolated non-severe thunderstorms along portions of the west coast
Thursday…Scattered thunderstorms - heavy rain, strong wind gusts (and some hail)
Convective Discussion
The 500mm heights continue to rise over the region, the highest value reported this morning is Washington and Long Island with 598 dam. The moisture content is also slowly increasing at the surface dewpoint temperatures are ranging from 18 to 24 and derived precipitable water from this morning soundings are ranging from 40 to 50 mm.
Most of the convective action will be occurring over Labrador today and a Watch message has been issued. In terms of forcing the surface cold front extends from Ungava to James bay and is already triggering some thunderstorm activity. This feature will be advancing gradually throughout the day, as the airmass ahead it becomes more unstable with falling 500mb heights. Surface dewpoints of 20 deg., Surface CAPE values between 1000-1500 J/Kg, and deep-layer shears of 40 kt will contribute to the development of hefty thunderstorms capable of producing straight-line 50kt gusts, rain rates of 25-50 mm/h, and to a lesser extent 1-3 cm hail.
Conditions will become more favorable for severe weather over NB-NS-NF on Thursday.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
