Sunday, October 12, 2014

Pushing towards winter...

Winter is approaching quickly and while we have some general ideas about how it will play out, October has some key data that needs to e considered before my winte outlook (Yes, the snow cover in Eurasia).

Update for Keith Allen who does a DC centered outlook, but I extrapolate what he does locally and he's had some good sucess in the past but he has some very off years too(Like we do)

This is a direct snip from a friend of his that knows his outlook. A DC radio station use to do a big deal when he released his outlook...

Temperatures:Above Average
Snowfall:Average
Rainfall:Above Average

Seasonal Temps:+1.3 to +1.7
Monthly: Dec:0 to +1
Jan:0
Feb:+4
Snowfall DCA:15"

Analog years:1974(5),1984(5), 1992(3)1997(8),2001(2)

Believes there will be a major ice storm around 1/15/15

Some friends in the met world think he does well the conditions are neutral- this year the El Nino is close to low end but the issues I see is that he has a STRONG El NINO, strongest on record and some La Nina too.

Other factors:

The El Nino has not gotten up to low end level yet, but it should peak between .5 and 1 over the winter but it may not be a huge driver of the winter pattern.

The PDO (Warm and cold water pools in the pacific outside the El Nino region) looks to be positive for the winter. This is a good signal if you like colder weather.

Eurasian snow cover is the last factor and we need October to grow. Much of the data circulates around how much snow cover grows in Siberia region. So far, so good-- but we need to let the data fill out. The growth has been good and growth has a strong correlation to - AO. This is usually a sign of cooler winter in our region of the world.

So, my thoughts are leaning colder than normal winter, but not as cold as last winter. Snowfall we didn't really get above normal until that last snow on March 25, so as of now, near normal is a fair call-- which is 17 in LYH and about 20 in ROA (Give or take) As in any winter, a fluke big event could skew that strongly.

No comments:

Post a Comment