Statements that “this is how it goes in a Nina” are mostly incorrect. Precipitation has been more like a Nino , strong lows into the lakes with copious moisture is more like a Nino . The temperature profile has matched Nina
Weather forecasting is like medical practitioners-practice to try and get it done better. The Enso used to be very reliable and many other theories have been circulated but SSW and MJO and the Ever Increasing alphabet indexes are like medicine-in a state of development and practice. They are too often presented as assured when really it’s unproven yet May in time become proven.
As painfully as many react to this-models do Not predict a weather outcome; they give examples of possibilities. It’s a good thing my doctor does not say “try this one or try that one” which is what models project with each 6 hour run.
I dont know but some of you very adept do know what mechanism forces cold air down thru Canada and over western PA and NY. That’s the source for snow in DC area. Plunging cold air into central USA and then rolling eastward just does not work, phase jobs don’t work, Miller As are our money .