Discover and read the best of Twitter Threads about #MTwx

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NEW: A NOTAM was placed with flight restrictions in north central Montana calling it a "National Defense Airspace." This is until further notice, issued at 00:20z (06:20 p.m. central time)
A USAF Stratotanker is in the area doing laps. #BalloonGate continued?
Read 9 tweets
Last week bitterly cold air developed over east central Siberia, the likes of which we haven't seen in 40 years this early in December. It was chronicled very well by @ThierryGooseBC on December 6.



1/
Ever since then the weather prediction models have been showing some crazy, downright silly numbers across Canada & the United States. I'm talking record high Mean Sea Level Pressure, both for December & ALL TIME. Here are those MSLP records from @NWSWPC researchers.

2/
For those not used to reading these maps, the values shown are the last three digits of the MSLP. For example, in #Missoula the all-time highest surface pressure observed was 1059.9mb on January 1, 1979. The record for December was 1054.5mb on #ChristmasEve, 1983.

/3
Read 14 tweets
You could write an entire meteorology textbook just based on the phenomena visible from this afternoon's wild satellite imagery looking down at the American West. (Thread) #CAwx #WAwx #ORwx #COwx #UTwx #MTwx #IDwx
Most prominent is incredibly strong early-season cold front plunging southward from Canada and currently stretching along a roughly east-west axis from Eastern Washington to North Dakota. Clouds are rapidly developing behind the front as cold air replaces a very hot airmass.
Next, there are numerous large wildfire smoke plumes visible in nearly every state not covered by clouds--including Washington, Oregon, California, Utah, Idaho, and Colorado. The total smoke volume is massive, and extends across most of the continental U.S.
Read 7 tweets

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