October 2020 Forecasts and Discussions

[Weather101]

Good point. For example, in February the trees don't have any foliage so even a SW storm would do much less damage.

I'd also add that the rapid wind direction shift that occurs during wind events from lows crossing the island, is a big factor to wind damage. Outflow winds don't usually have that factor if I understand correctly.

That said, the foliage on the trees is probably one of the biggest factors. I recall that the December 2008 outflow windstorm caused widespread power outages. But there was probably more foliage on the trees at the time though less than perhaps October or November.

Also you have to take into condersation how saturated the ground is and how much rain has fallen on top of the foliage on the trees. In February we really aren't seeing a lot of heavy rain like we are in October to December and back to back storms that can keep the ground saturated and make the trees easier to blow over. Also in the middle of our storm season it really isn't uncommon to see back to back storms with strong winds in the same week that also adds stress to the trees compared to later in the winter.

[Weather101]

6.8c and raining here.

Looks like the mainland will have to wait till Saturday morning for the first frost of the season.

5.9 and cloudy, Last week has just been clouding over here at night impossible for the temp to drop.

[Weather101]

http://www.seattleweatherblog.com/cold- ... n-average/

[Typeing3]

http://www.seattleweatherblog.com/cold- ... n-average/

Didn't realize Seattle's snowfall averages were so low that a 6-10" prediction would be above average.

FWIW at this stage, I'm thinking 45-60cm (17-24") for YVR this winter which is about 120-160% of normal.

[Weather101]

Didn't realize Seattle's snowfall averages were so low that a 6-10" prediction would be above average.

FWIW at this stage, I'm thinking 45-60cm (17-24") for YVR this winter which is about 120-160% of normal.

I couldn't believe it when I read it lol

[Monty]

Dropped to 0.2C before the clouds rolled in. Currently 1.2C and overcast. First real ground frost of the season as the lawns are all white.

[Monty]

Didn't realize Seattle's snowfall averages were so low that a 6-10" prediction would be above average.

FWIW at this stage, I'm thinking 45-60cm (17-24") for YVR this winter which is about 120-160% of normal.

And Portland averages even a little less than Seattle. Of course areas outside of both cities get quite a bit more

[Weather101]

https://twitter.com/NEWS1130Weather/sta ... 0?s=20[url][/url]

[Weather101]

https://twitter.com/MMadryga/status/131 ... 23968?s=20

[Rubus_Leucodermis]

Didn't realize Seattle's snowfall averages were so low that a 6-10" prediction would be above average.

What do you think one* of the reasons for my moving north from Seattle was?

* Just one, hardly the main one, but I’d be lying to claim it was not one.

[Monty]

Hmm. 500m freezing level tomorrow = snow level down to 300m. Should see some white stuff up at Sfu and similar elevations. Also possibly out in the valley from chilliwack east

[Abby_wx]

It looks like YXX dropped to 0.1C this morning. They may have even dropped below freezing in between hours. It only got down to 1.6C at my place... a bit too much low cloud hanging around.

[Slytyguy]

Early season wet snow over higher terrain is possible Friday morning as a modified Arctic airmass arrives on the coast. Below seasonal temperatures will continue through the weekend.

A low pressure system will pass just off Vancouver Island Friday morning and move onto the Washington coast Friday evening. Meanwhile, Arctic air will advance southward through the B.C. interior. The onset of precipitation combined with falling temperatures will bring a risk of wet snow to neighbourhoods and roadways above 300 m.

The system will move out of the region Friday evening but a cold airmass settling in behind will ensure temperatures remain 5 to 8 degrees below seasonal normals.

[Hughc0rne]

SWS is up.

[Storm]

https://twitter.com/50ShadesofVan/statu ... 31429?s=19