February 1st-2nd Roidzilla, Part IV: Final Forecast

We finally reached the grand finale. I couldn't help myself in upgrading this historic storm to a Roidzilla. I am not going to go into specifics and details since I already did that in the Part III thread. But it is important to repeat the following:

1. -NAO, or high latitude blocking, is extending the duration of this event from our typical 18-24 hours to almost 48 hours. Snow has already begun falling in places. Although the main part of the storm will end tomorrow night, there will be bands of snow still sitting over portions of this area all the way into Tuesday afternoon. Additional upper air vorticity phases into the mean trough late tomorrow night which expands the precipitation field of the system, and allows banding to reemerge on Tuesday. That will also be high-ratio snow and could tack on anywhere from 2 to as much as 5 additional inches in spots.

2. I can't get over the track of our mid-level low's (500mb, 700mb, 850mb). They track due south and then east of our area and that is as good as you will ever see. This either eliminates or significantly reduces a changeover to rain or dry slotting. While that remains a possibility since nothing is set in stone, I do believe the EURO and other models that track these lows off our coast instead of inland. Lower 500mb heights and a 250mb jet streak due east of Maine calls for a track of the SLP more east than where the RGEM (for example) has it. Therefore, my forecast heavily leans toward that idea.

3. The dynamics at play are overwhelming to talk about without getting so giddy. A LLJ, low level jet, at 850mb is streamlining 100+ kt winds into the core of the storm. At the surface, this has potential to reach tropical storm force winds. I did create a wind map to give you an idea of where the strongest surface winds will be, and where blizzard conditions are likely. This LLJ will aid in fueling the eventual CCB that develops.

4. This could turn out to be a once every 5 year, or even decade, type of storm. It has been a blast tracking this one with all of you. As I type this and look out of my window, I can see my first flakes have began to fall. And that right there is perfect timing. Good luck everyone and please stay safe!!!!!!

A milestone worth celebrating.

The forum just hit 1,000 registered members. I know some folks have not posted in a long time, but this is a number worth celebrating considering we started out with like 20 of us back over at the Channel 7 Bill Evans board.

Thanks frank beautiful map I am happy for being in the boarder line of 20 to 25 inches of snow .stupid question will I have to worry about mixing in the Bronx and Yonkers

frank 638 wrote:Thanks frank beautiful map I am happy for being in the boarder line of 20 to 25 inches of snow .stupid question will I have to worry about mixing in the Bronx and Yonkers

No mixing

Frank_Wx wrote:

frank 638 wrote:Thanks frank beautiful map I am happy for being in the boarder line of 20 to 25 inches of snow .stupid question will I have to worry about mixing in the Bronx and Yonkers

No mixing

thank you

jmanley32 wrote:

frank 638 wrote:Thanks frank beautiful map I am happy for being in the boarder line of 20 to 25 inches of snow .stupid question will I have to worry about mixing in the Bronx and Yonkers

we be crushed in yellow or red. Win win.

my fingers are crossed

Rooster89 wrote:Yeah I’ll take that firmly planted in the 20-25+ zone. My almost 5 year old and my 3 year old have not seen a real snow yet and this is looking like it.

Hey where are you, I think we are close.