Chinook

I'm seeing a 135kt maximum wind difference near Altoona IA

tornado moving northeast of Winterset, several minutes ago (552PM Eastern Time)

Hard to believe such nice 66-degree weather with sun will go away so quickly. Some rain and snow in on the radar out west, with a thunderstorm reported at Delta, CO (above freezing)

WPC predictions for both parts of the storm. The overall storm will be moderately helpful for the Western states. It's possible that not all of the 0.7" will be in the form of snow for Fort Collins.

I hope this isn't too far off topic. We have a La Nina winter, once again. Don't you think it is about time that a La Nina winter would bring about some springtime patterns favorable for greater than average tornadoes? I mean this possibly could be anywhere from the standard tornado alley all the way through "Ohio Valley Alley." The unusual part of this is that, this La Nina winter did bring about tornadoes, in WINTER, on December 10th and 15th. So you could argue that some of the Midwest is way above average for springtime tornadoes if you count December 1st as the beginning of springtime. on to the topic the 18z NAM has this in Iowa

NWS-Cheyenne posted that a few high temperature records were broken or tied yesterday in that area. The first part of the storm, most of Saturday, has a chance some snow with perhaps some rain and snow showers early in the storm, possibly some accumulation below 6000ft The second part of the storm from Sunday to Monday should give us a much better chance of accumulating snow over 3"

This represents Sunday Feb 20th to Saturday Feb 26th, which should be one of the coldest 1-week anomalies between now and next winter. As for the models tonight, the GFS/Canadian/UKMET have a short period of rain/snow for us next weekend, as I believe they are keeping a lot of the upper trough energy to the north. We may have to check back on these things in a couple of days. I think there may be snow at some point down the line.

100 hours below freezing? What is this? It's hard to do this so close to the Spring Equinox, really.

my observations from this annoying storm feb 21-22: 0.5" (0.04") record low maximum temp for Fort Collins feb 22-23: 1.2" (0.12") Loveland storm reports showed 1.5 to 4.0", record low maximum temp at Fort Collins feb 23-34: 1.6", (0.13") feb 24- still, just temperatures in the teens

A storm with everything, even TSSN in Oklahoma (seriously)

It's 2 degrees, with some unexpected light snow at 3:00 and 5:00PM. Just drove home at 8:00 with some very light snow rates and 1/4" on the road. Almost nothing was on the radar at 3:00 and 5:00. I guess that's just what happens at 5 degrees, snow just happens with nothing on radar. I think we have effectively started out storm #2, as the radar does show some 5 dBz - 10dBz snow across the area. We have a rare wind chill advisory, outside of Denver. See NWS-Boulder web page for further information (no winter weather advisory at this time.)

oh, you mean like this hail reported when below freezing?

My area went from maybe 55-60 degrees at 2:00 or 3:00PM yesterday to 12 degrees at 6:30PM tonight with a few snowflakes this evening so far.

I guess we will call this the Monday-Tuesday storm. Models vary on when the first snow bands will get into Larimer/Boulder counties. Tonight Canada has wind chills below -45F. I believe Environment Canada has some sort of different formula for wind chill, maybe?

NOWdata graph says 24.9" compared to record for 25.9" for January 1st to February 19th or 20th. The WPC prediction for one week (168hr) has up to 1.5" to 2.1"+ QPF for some of the mountains, especially west, like in the San Juans. This is the first time we have seen this for a while

We should get some snow with the arctic air mass on Monday night to possibly Tuesday, and then another, perhaps separate storm on Wednesday.

49mph wind gust and snow

We could back into another a mid-week deep freeze and snow

the new line of cells is producing a tornado

I guess this isn't getting a lot of discussion, but may very well be a dangerous tornado outbreak

My area did get 4.4" on Cocorahs reports, but honestly I couldn't measure barely even 3". Maybe some of it compacted, with the sunshine and all.

I got probably 3"-4", somewhat like expected at this point. The snow rate was probably not 1" per hour at any point.

Here is the GFS for later this week. The snow should start some time in the middle of the day on Wednesday, maybe 2:00PM or later. The models have been showing 0.5" to 0.7" QPF for the foothills up to 10000ft, and somewhat lower, possibly 0.3" QPF for the I-25 corridor. Gee, I'm not quite sure I believe the 31"-40" at the Iowa/Missouri border yet. As for Missouri, the NAM and GFS have a major snow for Kansas City, but the UKMET, Canadian, and Euro take it south of Kansas City. So, pretty interesting disagreement at this point in time. The NAM has kind of a nasty zone of sleet south of Kansas City.

As for me, I didn't get any one day over 0.42" in between August 19th-20th and December 31st-January 1st. The snow storm for this week will most likely be in the range of 06z Wednesday to 06z Thursday, and the models have lower snow amounts all across the board, basically, despite a nice location of the 500mb low. I guess we should still be on the lookout for the snow to be impactful.

Some information on Twitter says there has been more than 6" in some areas around Denver.