Stormchaserchuck1

Whole pattern is changing pretty fast at that point though. It looks like they want to reload the cold given by -WPO block. With the block retrograding and not reloading at that point though, it may not verify as cold as they currently have.

Really gets going in NE MD. RAP has been showing this for several straight runs.. we'll see. 25F

Here's what they are showing for February.. and have been showing this for a while. since at least September. Other global models are showing the same thing in the PNA region

That storm could trend warmer. Cold air will be cutoff, with NAO going + and -WPO retrograding

Looks like about 1" so far in Fallston, MD. Coming down heavier now.

Really became a storm NW of Philly and NYC. I don't think the NW trend is over this year.. even the next weekend storm might end up pretty near freezing.

21z RAP keeps the precip around tomorrow.. and goes 4-6" in northern MD

18z GFS is a good 3-4" here.

As far as long range forecasting goes, this is probably the most data I have seen supporting a favored atmospheric state 1+ month out. The Euro weeklies, ECMWF seasonal forecasting model, and other seasonal models all have a big +PNA (N. Pacific 500mb low) developing and sustaining for the month of February. For the last few decades, ENSO has correlated to the Global pattern, of all months of the year, the most in February. In La Nina's, we have seen a lot of -PNA's, and El Ninos, +PNA's during this month. The El Nino right now is in a "Strong" state, with Nino 3.4 sitting at +2.0c: It is actually the 7th total greatest ENSO event (all el nino's and la nina's) since 1948. My issue with +PNA February is we have seen a global state take over in the last 6 years. For a 6 year period, there is no other 500mb anomaly stronger than the -PNA we have seen from 2018-2023: The 2nd place 6-year running anomaly total only hits 0.80 correlation to ^this max. Now we have had more La Nina's over that 6-year period, but even our Neutral-El Nino Winter's have had a mean -PNA in recent February's: Which would you predict for February, a continuation of the recent ongoing years anomaly spike in the N. Pacific Ocean, or an El Nino driven +PNA (breaking the trend completely)? The CPC is going with a break, on a soft +PNA signal: https://ibb.co/dL4P5nW And long range 12z GEFS also has us going +PNA right now around Feb 1st. I think the patterns we have seen in December and January so far do not point to a big +PNA developing like seasonal models say, unless the El Nino all of a sudden wakes up, but it may be hard to sustain this -PNA pattern a 7th consecutive year. Should be interesting to see what happens. Any thoughts/analysis? I think if we don't do a -PNA in February, we'll do it in March.

I've seen this plenty of time in the historical analysis - where a major 10mb warming occurs when the AO/NAO is ++. It still "downwells" to a strong -NAO correlation in 15-25 days! It's about 65-70% probability, which would put us at Feb 1-7. Current 15d models are already trying to shift the NAO back to Neutral.

Yeah, that's weird that I have to wear a label. Don't get it.. I should complain like zywts. It's a shame, I have a lot to offer OT lol.

New Euro gets DC up to 580dm Jan 23rd! 470'sdm over south Greenland, makes that a >100dm gradient/difference! CPC has the AO hitting +3 during that time. It doesn't look permanent though.

18z Hrr has 3" for NE MD.. this thing really trended north after us. storm is now suppose to snow to Toronto.

These strong -WPO patterns usually flip. Here's the Jan 500mb regression correlation to WP-index https://ibb.co/WKJnvb1 See how it reverses over Alaska the next month https://ibb.co/tCJW8KT That's what we are seeing on models.. it maxes out near +600dm Jan 17-19 https://ibb.co/L5Bz98K Then it flips over AK Jan 22-24 https://ibb.co/WDSGf8Q It could really get warm when that happens.. it also looks like the +NAO is pulling from the depths of the Atlantic tropics, as like 50% of the Hemisphere is above average Jan 25-27. Ensemble mean has the 576dm line in DC Jan 23-25.

I think the trend toward a stronger system is a good trend, but short term models are sneaking a warm tongue in there and dryslot. Ideally, I think the heaviest precip should occur NW of the surface low, so I don't mind it wrapping up.. The global models are keeping precip closer to the surface low than the short term models are right now.

3z RAP really upped the totals from TN to WV.. north trend on this model

It's shifting NW/stronger vs 21z https://ibb.co/4JWmnr7

02z RAP is shifting NW/stronger as well.

I like the maps just fine.. you can't see everything? They animate nicely. You can show me better maps if you want, but I like snow depth.

01z RAP is looking more impressive https://ibb.co/NK9x4N2 12" in TN

They will probably put WSWatches up north of Baltimore

It actually shows 2-4".. ratios have it changing over to ice briefly along I-95.

Stronger coastal https://ibb.co/SPJpBLm

Coastal low is further south on the NAM... keeps the precip going over the area

Shifted north a good bit https://ibb.co/F0pp2Kz