The HRRR has done very well since we flipped to the milder pattern. Has hit on just about every warmer day thus far around here. So I’d say ride it... .
Down to 4” snow depth at RFD and 5” at ORD, with outlying areas across N IL still in the 6-9” range. That should all vanish the next two days, with temps into the 50’s, and also DP’s into the 40’s today and even the 50’s for a time tomorrow. .
With no additional snowfall accumulation expected in the final days of the month, February 2021 will finish as the 9th snowiest February on record for Chicago...
Top 10 snowiest February's...
1. 29.0" - 2011
2. 27.8" - 1896
3. 26.8" - 2015
4. 26.2" - 1994
5. 22.6" - 1900
6. 22.5" - 2010
6. 22.5" - 1967
8. 21.8" - 2008
9. 21.6" - 2021
10. 21.1" - 1901
The -AO has been around since the start of Dec.
The main driver in the flip to cold sustained cold was the NAO, and then the PNA not being well + helped keep the active storm pattern going at the same time.