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Rank: F5 Superstorm
28 years old
Born July-1-1989
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Joined: 21-January 08
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Viewing Topic: Major Snowsquall Outbreak
Local Time: Nov 20 2017, 09:48 PM
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12 Nov 2017
The second lake effect snow outbreak it poised to hit this coming weekend, only this time expect bigger squalls, a longer event, with higher accumulations. I will continue to monitor this event as we head through the week including any changes I see.

Right now I'm expecting this to be a NW to SE orientation, at times being a WNW to ESE orientation. Many areas will see snow, some will see very impressive amounts. While it's too soon to start issuing a city by city snowfall amount I'm going to go out on a lim and put out my initial map where I think the heaviest snows will fall.

Remember, the dates may change. There's a chance we won't see any major activity until into Sunday (19th) as seen on the CMC. The GFS is aggressive and shows a long duration major event. By Wednesday we will have a much better idea.

Attached File  Nov_18_20th_2017_Squalls.jpg ( 203.17K ) Number of downloads: 15

Areas in the high risk zone have a good chance at over 30CM IMO at this point. More to come this week....
30 Jan 2017
Im liking the Thursday Feb 2nd to Saturday Feb 4th timeframe for some pretty intense squalls. There looks to be ample cold air in place which will allow for some fairly intense bands to develop.

We've seen some bands of heavy flurries develop across most of SW, S, C Ontario Wednesday Feb 1st which has put down 2-10cm in many locations. These bands of flurries will consolidate into more classic snowsqualls as we head towards Thursday and into Friday.

Right now its looking like a WNW to ESE event, at times veering into a more NW flow.

Areas to be on alert for 30cm+

-North Simcoe County
-Owen Sound
-Sauble Beach
-Bruce Peninsula
-Grey County

Attached File  Squalls_Feb_2nd_4th.jpg ( 234.6K ) Number of downloads: 8
16 Jan 2017
I'm creating a thread on this storm, as all the models are showing something for next week. Looks to move into SW Ontario on the 23rd and make its way east, the effects continuing to be felt into the 25th and 26th out east.

Models have been dancing around with tracks, and precipitation types.

Here's the 12z CMC model:

Jan 23rd morning
Attached File  gem_mslp_pcpn_frzn_neus_27.png ( 158.64K ) Number of downloads: 1

Attached File  gem_mslp_pcpn_frzn_neus_30.png ( 172.67K ) Number of downloads: 0

Attached File  gem_mslp_pcpn_frzn_neus_31.png ( 180.73K ) Number of downloads: 0

Heavy snow in Eastern Ontario by this point moving into Southern QB.
Attached File  gem_mslp_pcpn_frzn_neus_35.png ( 181.08K ) Number of downloads: 0

Here's the 18z GFS run from tonight

Attached File  gfs_mslp_pcpn_frzn_neus_28.png ( 162.56K ) Number of downloads: 0

Attached File  gfs_mslp_pcpn_frzn_neus_30.png ( 181.72K ) Number of downloads: 0

Attached File  gfs_mslp_pcpn_frzn_neus_32.png ( 175.58K ) Number of downloads: 0

Attached File  gfs_mslp_pcpn_frzn_neus_34.png ( 170.45K ) Number of downloads: 0

As you can see this run of the GFS isn't as bullish for big snowfall out east, but potential remains.

Mostly rain for Southern Ontario at this point but potential is there for some mixtures especially over higher terrain.
28 Dec 2016
I am creating this thread to highlight the potential for heavy lake effect squalls, expected to develop Thursday evening and continue into early Saturday. Right now I am looking at a primarily NW event.

Here's my map

Attached File  LES_Dec_29_30th.png ( 359.19K ) Number of downloads: 0

Right now it looks like the squalls will begin tomorrow early evening and strengthen overnight tomorrow. The bands will move around through Friday as winds will be oscillating but overall a primary NW flow, at times WNW off Huron and NNW off GB. However NW will be the primary direction.

This will take the heaviest Huron activity north of London in my opinion. I like the Kincardine down to Goderich corridor and in-land from there. Listowel down to Stratford will be dealing with squalls oscillating in and out of the area with areas closer to the lake getting hit hard (Wingham down through Mitchell and Exeter) where I feel 30-40cm is possible. London is a close call, the northeastern part of the city stands a better chance but from what I'm seeing the highest accumulations occur well north of the city. The actual city should not see anything significant.

Off Georgian Bay the highest accumulations will be felt from the Wasaga Beach to Barrie corridor and to the SW of that in areas like Angus, CFB Borden, New Lowell, Essa Township, Baxter, Cookstown/Innisfil, etc. Up to 40cm is possible in this region. Alliston will again be too SW for the heaviest accumulations, but stands a possibility of receiving 6-15cm if the squall can stall over this area. I think you'll see it cream areas just to the north and east, at times affecting the town. The east side of the town will likely fare better.
16 Nov 2014
Ok guys,

We are entering our second big LES event. I know many areas received heavy snowfall Thursday and Friday of last week, with a swath covering Parry Sound south to Barrie picked up 10-30cm of snow. I apologize I couldn't give any insight on that, as my computer was in getting repaired and it's very hard to give any updates on my phone. More snow is on the way. This thread is for discussion on the LES event beginning Tuesday and continuing into Saturday.

The winds will be changing frequently. The three primary directions will be WNW, W, and WSW. It will also be at times SW and NW. Due the changing directions, I am not expecting any epic accumulations, but I am picking up clues that some of these bands will be VERY heavy, at times delivering up to 10cm an hour to certain locations.

I will be updating this thread frequently this coming week with more details. As for the GTA, I am seeing a band coming off Lake Huron (a unique WNW flow) that could affect the area delivering a dusting to 5-6cm across many areas. There is potential for this band to even give higher amounts should it lock in for a few hours. I will be monitoring this.

Here's a preliminary map I just did up now indicating some accumulations this week. I do think that by Saturday most of Southern Ontario will be white as these bands will be moving around quite a bit.

Attached File  Squall_Event_Nov_17th_20th.jpg ( 238.96K ) Number of downloads: 10

Here's a map showing the main bands. Now they of course will not be this wide, however I wanted to show a visual of what will be happening. The areas in the #1 #2 and #3 zone will be seeing the highest chance of seeing accumulating snows as long bands develop, and will oscillate like a windshield wiper across a wide area. Band #3 will move even further south impacting the Kitchener area as well from time to time. So while it's possible one area may only get a few hours of squall activity, accumulations may be 3-5cm PER hour inland at times and even more closer to the lake. So it's extremely hard to pinpoint exact accumulations.

Attached File  Main_Bands_Squall_Event_Nov_2014.jpg ( 189.96K ) Number of downloads: 8
Last Visitors

13 Nov 2017 - 12:51

4 Nov 2017 - 9:57

16 Aug 2017 - 21:34

22 Mar 2017 - 8:32

10 Mar 2017 - 19:29

Happy Birthday Travis... you need to start updating your blog though
29 Jul 2010 - 23:02

hey there..
want to know more about you... hope you wont mind..
I found you interesting..
10 Dec 2009 - 18:33
hey travis i posted some pics in the febuary pattern disco for you. have a good day.
28 Jan 2009 - 12:16


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