As hot and humid air continues to flow up the Eastern Seaboard into the Maritimes, it has produced a fog monster just off our coast.
Fog occurs as humid air sits and cools over ocean waters. As it cools, it can no longer hold as much moisture in the form of water vapour and the rest condenses into fog.
From space, this extensive fog bank can look like cloud — but there are some observations that give it away as mostly fog and mist.
For starters, the area of fog doesn't move with other clouds in the vicinity — indicating it is at a much lower level in the atmosphere. It also has a much smoother appearance from the top compared to most other cloud types.
Additionally, several weather observation stations — from Saint John to Yarmouth, out to Sable Island and up to the Burin and southern Avalon peninsulas in Newfoundland — have reported fog while under this area on satellite.
Of course, the continuing flow of southerly air is producing another scorcher for Nova Scotia today.
Most highs away from onshore winds on the Atlantic coast will reach the low 30s. There were several record-breaking temperatures yesterday and more are expected today.
A few station-specific records from yesterday include:
- Caribou Point, 30.6 C — previous record was 28.0 C in 2001.
- Cheticamp, 28.5 C — previous record was 28.3 C in 2010.
- Malay Falls, 30.0 C — previous record was 29.0 C in 1991.
- Port Hawkesbury, 31.9 C — previous record was 31.0 C in 2002.
- Tracadie, 30.3 C — previous record was 27.4 C in 2009.
Environment Canada defines a heat wave as three or more days with a high of at least 32 C.
I believe at least parts of Nova Scotia may have a chance of reaching that criterion as the hot weather remains in place again tomorrow.