Chinook

storm name "Marco" is on this year's list for the Atlantic. It would have been a huge coincidence if Marco and Polo were named storms at the same time.

looking upwards to Long's earlier today

Recent passes of Hurricane Polo show flight-level winds around 150kt and pressure values of 909mb or a bit less. The TropicalTidbits satellite view now has a 914mb pressure shown. (not sure if this is the official value)

I got to give you props for pulling up this old satellite image!

This is like a once-in-a-lifetime view of Pacific systems

The jet stream has broken down in to some strange patterns today, with a north flow over the Great Lakes, south flow over the Rocky Mountains, blocking high over Quebec

I guess these temps were like mid-July

Polo

Marco

I'll trade you 2" of rain for a low dew point. I've got extra. I just want a dew point of like 30 or something, really.

The NAM was not that accurate with a lot of precipitation for a long time. But you gotta love the severe weather soundings when it said 3000 J/kg when the GFS said 1500 J/kg.

On October 6, say goodbye to the NAM, HREF, and SREF, and say hello (?) to some or all of these things replaced with RRFS/ensemble RRFS. I don't know what that's going to look like and I don't know how various web sites will deal the new data feed. I would imagine that the SREF was not really preferred for various reasons. However, it is definitely going to feel strange going to the Pivotalweather or College of Dupage web sites, and not see the NAM, at all, ever.

a tornado went over a mountaintop at Kaysville, Utah today

Fort Collins has had 2.78" (roughly 2.50" on CoCoRAHS) vs an average of 3.05" in 60 days

Today seems to be one of the bigger monsoon (southwesterly) rainstorms for Arizona, associated with the trough on the West Coast.