EXPIRED------------------UPDATE: Much stronger and more defined rotation couplet!-------------Signs of rotation on the Thunderstorm east of Bancroft, moving northeast towards Eganville, etc.Please be on alert with this storm as it is likely very intense.What are you experiencing out there?Please let us know and only when it's safe to do so.- OBW
Timeline Photos EXPIRED
Almost a low-end hurricane tomorrow (beginning overnight tonight) with a moderate risk of damaging wind gusts and the low risk of a Tornado in eastern Ontario.
There's an incredibly low (almost not worth mentioning) risk of a weak Tornado across Southern Ontario but the impressive (for this time of year) risk is eastern Ontario.
After 42 Tornadoes in Ontario over the past two years including an EF1 Snownado last year _today_ at 0c temperatures and an EF1 this past October at 10:30pm with temperatures at 10c, all bets are off.
The one thing you can bet on is, we'll be watching radar.
More details a.s.a.p.
P.S. Our sympathies to all those with weather related migraines. This is one of the strongest low pressures we've seen in years. :/
EF1 SNOWNADO: 1 year anniversary today.Last year on November 23 Ontario saw its 22nd tornado of the year, rated EF1 in North Augusta near Prescott.The tornado (Charleville to be precise) was accompanied by a burst of snow, hail and 0c or just below temperatures. The tornado lifted 60% of a concrete silo into the air before toppling it. Damage was extremely localized but witness Sheena G. described a hail storm, which cleared and then a funnel cloud with a burst of snow.A storm window was blown out (intact) in her house and they couldn't even close the door the winds were so strong.:OIs this unusual?Yes! Winter Tornadoes are incredibly rare. But we must remember that twisters can happen any time of year, in many parts of the country, and even at night.Although, we posted the other night (Thursday) about creep rotation inside a snow squall near Hanover and north of Goderich. (Thx to Chris M. for the heads up!)Here's an animated radar of the multiple rotation couplets that developed that night:https://www.youtube.com/watch?v=UMrEUng7-MQSquallnadoes%3FImage 1: Damage from the event (Thanks to Sheena G. for the photos and details on the event. Glad everyone was okay!)Image 2: Full size silo for comparisonImage 3: Supercell structure with hook echo on radar. Very low-topped supercell (5 km) with no lightning apparent.Image 4: Velocity had weak rotation but Canadian Radar had defined coupletImage 5: Hook echo visible in 3D radarImage 6: ML CIN, a product that normally demonstrates Tornado inhibition actually nailed this TornadoImage 7: MUCAPE + Bulk Shear nailed it tooIt's also interesting that it warmed up just as the Tornado happened and then sharply dropped to -3c afterwords.Also, the only other historical near 0c Tornado we can find was an F2 in Altus, Oklahoma on Feb 22, 1975 at 12:30am and it tragically killed 2 people, injured 12. :/There have been three other late-season tornadoes reported in Ontario: in Leamington on Nov. 29, 1919; Exeter on Dec. 12, 1946; Hamilton on Nov. 9, 2005.Welcome to Ontario. :O- OBW