beavis1729

18" snow depth here, 4th highest seasonal max on record IMBY. Here's the Top 4, based on where I lived at the time: (1) 24" on 12/26/2000, Glen Ellyn IL (2) 22" on 2/5/2011, Carol Stream IL (3) 21" on 2/4/2015, Lake Zurich IL (4) 18" on 2/16/2021, Lake Zurich, IL I imagine yesterday's 28" depth in Evanston (?) is the 3rd highest IL seasonal peak on record. Antioch had a 38" depth in the 1978-79 winter, and I believe some places were around 30" in December 2000.

Thanks for the corrections...was going off hourly obs for the most part, so some places may have dropped a bit lower intra-hour. Looks like the -20 in Fayetteville is a new all-time record (old record -18).

Nearly historic cold in NE, KS, OK, TX, AR, LA, MS, AL (EDITED 2/17/21 to correct some temps and add some commentary) Lincoln NE -31 (49 degrees below normal, 2nd coldest temp since records began in 1887...-33 on 1/12/1974) Sioux City IA -28 Concordia KS -22 Manhattan KS -20 Fayetteville AR -20 Wichita KS -16 Topeka KS -16 Oklahoma City OK -14 (coldest since 2/12/1899) Tulsa OK -13 (close to all-time low of -17) Amarillo TX -11 Wichita Falls TX -8 Tyler TX -6 (new all-time low) Longview TX -5 (new all-time low) Dallas TX -2 Shreveport, LA 1 Memphis, TN 1 Austin TX 8 San Antonio TX 9 Houston TX 13 Baton Rouge LA 20 Galveston TX 20 Mobile AL 20 McAllen TX 22

Snow depth is as of 7am...so it was before the current storm started.

May need to double-check the #'s...but Dallas's high temp today (14) was colder than the old daily record low (15) set in 1909. Normals are 60/39. Even more impressive, OKC's high temp today was 4. Old record low was 7 set in 1909. Normals are 55/33. This is incredible for stations with a POR > 100 years.

Interesting NE-SW temp gradient as the relatively warmer air (plus warmer lake) wraps around the storm. Near 12F in NE IL, but only 3F in STL.

Some MN temps this morning: INL -39 (dropped from -9 at 4PM, to -31 by 9PM) Hibbing -38 Bemidji -37

Wow. Dropped to -3 here with 1-2” of fluff overnight. This overall set-up is fairly typical of arctic outbreaks. At the beginning of the outbreak, it’s more advection driven...then towards the end the radiators win out. A -35 temp at 45N in mid February is extremely impressive.

^ Wow, impressive cold in MN. The -50 could be close to the coldest MN temp on record so late in the season. And the -35 at Duluth is probably close to their all-time record, as they usually get some moderation from Lake Superior. Only hit -8 here this morning, even with a good radiational cooling set up. Cleared out right after sunset yesterday, 16” snow cover. We just don’t radiate well here, and it probably didn’t help to be on the far southern edge of the arctic air mass. This cold snap will be remembered for longevity here, not the extremes. Was hoping we could pull off a -15 or -20, but the coldest was -10 early on in the outbreak.

INL hit -42 this morning. I think this is the coldest temp in the US from this outbreak so far. Could be challenged the next couple of nights in the radiator spots like Tower or Embarrass MN.

Not necessarily; you’re assuming that OKC’s winter high temps are normally distributed...whereas the true distribution probably has some skew to it. Plus, there may be a “midnight high” which is what goes down in the record books, even if the afternoon high were only 2.

NWS is forecasting a high temp of 2 in OKC on Monday 2/15. Normal high is 55.

Even as the cold has moderated in recent days south of 45N, it continues to be brutally cold in ND and MN. Langdon, ND dropped to -35 this morning. Lowest wind chill was -60, at 4:55 AM (temp -33, W wind at 13 mph). Looks like the WC has been -30 or colder at every single hourly ob over the past 7 days.

Congrats! Still not a flake all day here in SW Lake County. Hopefully that changes tonight.

Point for Langdon ND, in the far northeast part of the state. Counting the past few days, it could be a 7-8 day streak with temps -10 or colder. Today Patchy blowing snow before 4pm. Mostly sunny and cold, with a high near -10. Wind chill values as low as -45. Breezy, with a west wind 16 to 21 mph, with gusts as high as 32 mph. Tonight Mostly clear, with a low around -23. Wind chill values as low as -44. West wind 11 to 14 mph, with gusts as high as 23 mph. Wednesday Sunny and cold, with a high near -11. Wind chill values as low as -47. West northwest wind 11 to 14 mph, with gusts as high as 22 mph. Wednesday Night Partly cloudy, with a low around -27. Wind chill values as low as -45. West northwest wind around 11 mph. Thursday Partly sunny and cold, with a high near -14. West northwest wind 10 to 13 mph, with gusts as high as 20 mph. Thursday Night Mostly cloudy, with a low around -29. West northwest wind around 11 mph. Friday Partly sunny and cold, with a high near -15. West wind around 11 mph, with gusts as high as 20 mph. Friday Night Partly cloudy, with a low around -31. Northwest wind 8 to 10 mph. Saturday Mostly sunny and cold, with a high near -13. Northwest wind around 11 mph, with gusts as high as 18 mph. Saturday Night Partly cloudy, with a low around -24. West northwest wind 11 to 13 mph, with gusts as high as 18 mph.

Wow, only -5 here. Looks like you cleared out right after sunset last night, perfect radiational cooling.

Notable cold this morning: Langdon, ND wind chill -57 at 6:35 AM (-29 with W wind 15 mph) International Falls, MN wind chill -53 at 7 AM (-36 with SW wind 5 mph)

Low of -10 here on Sunday morning, PM high of 2. Dropped to -3 this morning.

Yes x 1,000,000 to the hashtag

Let's shoot for #1...1899 or bust. Same time of year too.

Dropped to 1 this morning, coldest of the season. We may hit -10 tonight.

All things being equal, you're right that it's more difficult to get severe cold in mid-Feb...but in Chicago, record lows are still fairly cold (generally -10s) this time of year. The airmass has been building up north for awhile, and sun angle up there is still weak with relatively short daylight. Plus, there's extensive snow cover in the source region all the way down to here, which acts like a refrigerant.

This is a great blog on Alaska weather...here's an article about the extremely cold airmass in northern Alaska: http://ak-wx.blogspot.com/2021/02/frigid-in-north.html

^ Yeah, 18z GFS brings down the motherload. Some crazy cold, including H85 temps around -30C in N IL on 2/13...but of course it's an op run at Day 9-10. Regardless, it still shows 11 consecutive days with sub-zero lows here, from Feb 6-16.