The Weather Network's traditional definition is "the third Full Moon in a season with four Full Moons," which is what we will see on August 22.
While seasons typically have three full moons, some seasons, like summer 2021, have four: June 24, July 24, August 22 and September 20.
The moon won't actually appear blue — that's just the name used to describe its rarity since the moon doesn't often appear blue.
When we see the moon change colour, The Weather Network says it's usually orange or red due to a lunar eclipse or when there are smoke and ash particles in the air.
According to NASA, the moon can look blue when the air has lots of "particles slightly wider than the wavelength of red light (0.7 micron)--and no other sizes present. This is rare, but volcanoes sometimes spit out such clouds, as do forest fires."
Regardless of its colour, this weekend's full blue moon is going to be beautiful so don't miss it!
This article’s cover image was used for illustrative purposes only.
Now that Labour Day's come and gone, and nights are beginning to feel cooler, many Montrealers have weather on the brain: Will we have a long summer? Will winter come early? The Weather Network aka MétéoMédia just released its three-month long-range fall forecast for Quebec and, let's just say, there's good news and bad news.
The good news is that The Weather Network predicts "extended periods of fair weather and warmer than normal temperatures" during late September and throughout October.
"This will provide excellent opportunities to get out and enjoy the fall foliage," according to meteorologist Dr. Doug Gillham.
The bad news is the transition to winter is expected to happen rapidly with winter weather coming earlier than usual, compared to what we've seen over the past 20 years.
"We have become accustomed to very mild Decembers, but this year should bring more typical amounts of winter weather during the weeks leading up to and through the holidays," said Dr. Gillham.
"A pattern change during late fall is expected to bring an earlier arrival to winter weather, and more winter weather leading up to the holidays than we have often seen over the past 20 years."
...and not just any Supermoon, this will be the biggest Supermoon in the last 70 years!
On November 14th the moon will be at its closest point from Earth which will make it appear up to 15% bigger and 30% brighter than it normally does.
Coincidentally, the moon will also be full, making it a Super Full Moon which is even rarer.
Plus, the moon will appear lower in the horizon, and when that happens, your eyes compares the size of the moon to the objects in the distance which creates an optical illusion that makes it seem even bigger.
Finally, the reason why this will be the biggest moon in 70 years is because it's also winter. Winter moons are closer because Earth is closer to the sun causing the sun’s gravity to pull the moon even closer.
When you combine all of these factors together it will make for one giant moon and one spectacular show.
This will be the time of year when the moon is almost at it's closet distance from earth.
Combine that with a phenomenon called "Moon Illusion" and the it will appear gigantic!
Moon Illusion occurs when the moon appears lower on the horizon.
Your brain struggles to make sense of the size and distance between the objects your eyes are seeing. The opposite effect happens when the moon is high up in the sky. Since there are no objects nearby, it appears smaller.
This Supermoon is also supposed to change colors. That's because on the other side of the planet, there will be a "penumbral lunar eclipse". This means that from our side of the planet the moon may have a slight crimson hue.
This will be the last time until 2029 that you'll be able to see the Harvest Moon coinciding with the autumn equinox.