Kalin's Call: Frosty October morning sets record lows in the Maritimes
A number of weather stations recorded record-low temperatures in the Maritimes on Monday.
New Brunswick
Bathurst Airport: -1.8 C
Edmundston: -6.1 C
Kouchibouguac: -2.5 C
Saint John Airport: -2.1 C
St. Stephen: -3.3 C
Nova Scotia
Bedford Range: -1.2 C
Halifax International Airport: 0.4 C
Halifax Windsor Park: 3.3 C
Malay Falls: -0.9 C
P.E.I.
Charlottetown Airport: -0.9 C
Several other sites in the region came close to matching record lows. In general, morning temperatures were several degrees below early October averages, which range from about 2 to 6 degrees Celsius. Patchy frost and even some ice was spotted around the region to start the day.
Recorded low temperatures were reported on Oct. 3, 2022. Some of the sites set new record lows for the date.
The combination of being on the eastern side of a high-pressure system set us up for the fall frost. The atmosphere circulates clockwise around high-pressure systems in the northern hemisphere. That circulation brought a northerly wind to the Maritimes that tapped into colder air in place in northern Quebec and Labrador. Additionally, the high pressure kept the night sky clear and the wind light, allowing for more radiational cooling (loss of heat due to emission of longwave radiation from the Earth’s surface).
High pressure has brought a chillier northerly flow of air, clear sky, and light wind -- a perfect recipe for frost.
Given it’s a very similar weather pattern for Monday night, expect another chilly, even frosty, start to the day Tuesday.
Frost advisories remain in effect for large parts of the Maritimes for Monday night. Note that frost advisories are only issued during determined “growing seasons,” and since northern New Brunswick is past that part of the season, no advisories are in effect there despite the fact that there will almost assuredly be some frost development Monday night. Frost advisories will no longer be issued for other parts of the Maritimes after October 15.
Another chilly early October night is ahead with more frost advisories issued.
The average first frost in the Maritimes ranges from early September in northwestern New Brunswick to late September/early October for much of the rest of the region.
Some coastal areas of Nova Scotia and eastern P.E.I. sometimes don’t see frost until mid-October. A turn to southerly winds will bring the overnight low temperatures up after Tuesday. That will last until Saturday night, when a northwest wind takes back over following the passage of a cold front on Saturday.
A general map on when parts of the region typically experience a first fall frost. Some areas, like the Cape Breton Highlands, lack data.
CTVNews.ca Top Stories
'Anything to win': Trudeau says as Poilievre defends meeting protesters
Prime Minister Justin Trudeau is accusing Conservative Leader Pierre Poilievre of welcoming 'the support of conspiracy theorists and extremists,' after the Conservative leader was photographed meeting with protesters, which his office has defended.
'My stomach dropped': Winnipeg man speaks out after being criminally harassed following single online date
A Winnipeg man said a single date gone wrong led to years of criminal harassment, false arrests, stress and depression.
Ukraine uses long-range missiles secretly provided by U.S. to hit Russian-held areas, officials say
Ukraine for the first time has begun using long-range ballistic missiles provided secretly by the United States, bombing a Russian military airfield in Crimea last week and Russian forces in another occupied area overnight, American officials said Wednesday.
'One of the single most terrifying things ever': Ontario couple among passengers on sinking tour boat in Dominican Republic
A Toronto couple are speaking out about their 'extremely dangerous' experience on board a sinking tour boat in the Dominican Republic last week.
All Alberta wildfires to date in 2024 believed to be human-caused: province
There are 63 wildfires burning in Alberta's forest protection area as of Wednesday morning and seven mutual aid fires, including one in the Municipal District of Peace.
7 surveillance videos linked to extortions of South Asian home builders in Edmonton released
The Edmonton Police Service has released a number of surveillance videos related to a series of extortion cases in the city now dubbed 'Project Gaslight.'
Suspects waving weapons, smashing glass in Toronto jewelry store robbery caught on video
Arrests have been made after five men were captured on video rampaging through a jewelry store in Toronto, waving weapons and smashing glass display cases.
Bank of Canada officials split on when to start cutting interest rates
Members of the Bank of Canada's governing council were split on how long the central bank should wait before it starts cutting interest rates when they met earlier this month.
New evidence challenges the Pentagon's account of a horrific attack as the U.S. withdrew from Afghanistan: CNN exclusive
New video evidence uncovered by CNN significantly undermines two Pentagon investigations into an ISIS-K suicide attack outside Kabul airport, during the American withdrawal from Afghanistan in 2021.