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Fast forward to winter, extended spell of unseasonably cold air begins

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BIG DROP

Who turned off the heat?  Temps are in free-fall at 4 p.m., down 22 degrees since lunch. Throw in the wind chill and it feels 30 degrees colder! It's all part of a large-scale pattern change that resembles last winter's dominant cold. Warm air surges into Alaska and buckles the jet stream. The cold is dislodged and spills into the U.S.

last 60° day for awhile

last 60° day for awhile

4 PM Tuesday

4 PM Tuesday

RAIN MOVES OUT

Showers are ending quickly from west to east and before the Tuesday evening commute. Clearing will develop after 12 AM. Winds that are brisk will ease some overnight but plan on waking Wednesday to 20s and wind chills in the lower teens.

EXTENDED COLD SPELL

Call it a cold wave.  The cold takes hold - possible for up to two weeks - with afternoon high temperatures running as much as 20° below normal.

Reinforcing cold hits early next week - and while this first wave of cold is strong for the season it isn't record-breaking. In fact the average date of our first sub 40° afternoon in November 13th - right on cue and this year is exactly the same date as last year, November 12th.

buckling jet stream sends unseasonably cold air here

buckling jet stream sends unseasonably cold air here

Early next week  - more cold coming

Early next week - more cold coming

ANY SNOW?

A few flurries could show up here late Wednesday night and early Thursday morning but a sticking snow could emerge with an unorganized system Sunday.  Current snow projections look on the light side - but perhaps enough to stick.  We will firm up that snow potential as the week progresses.

System could bring a sticking snow by Sunday morning.

System could bring a sticking snow by Sunday morning.