wxsniss

18z-22z was always progged to be peak for eastern MA and it's not disappointing

Yep, might be back to heaviest of event as that band expands west and pivots Logan farther east must be close to 20 at this point

Keep em coming @DotRat_Wx! Wish I could post more Boston metro southeast getting crushed from this 700 fronto band since this morning. No doubt 30" will be reach somewhere southeast MA TWC reported 17.6" Logan at 2pm, didn't see on PNS Before/1pm photos from Brookline Village just outside of Boston during some of the heaviest of the event so far:

Was hanging out in here... I see it now, time to transfer over Get sleep man... I think the most critical nowcast is early Saturday AM

Yep Should be a fun Saturday afternoon

Agree Guidance just yanks it east chasing that further low. 9z-15z this morning is when that further low makes it presence... will be a good nowcast

Euro/RAP have settled around 1.5" for us... let's hope that stabilizes. With banding and 13-15:1 ratios, that would still give us a shot at 20+

No worries! Was anticipating the 12z-18z improvement would continue, but not to be. Still a tug of war of lows and not sure we've stabilized. This run tugs the low almost northwest as it gets captured, but that occurs later.

Tracks somewhere between 12z and 18z, ie not as good as 18z

One critical nowcast period looks to be 9z-15z Saturday (4-10am) when that convection driven runaway low farther northeast really stretches out from our main low. If we can mitigate that stretch, we crush.

CCB is slightly better for southeast MA

NAM unquestionably west thru hr15 12z was a burp cycle

I don't think this is done trending back west on guidance... NAM should tic west with a more consolidated low thru 12hr I posted earlier: relative to 12z guidance stretched out by that overweighted vorticity far east, we will watch this LBSW where SW = SNE If I didn't have very dependent dependents keeping me away from the computer, I'd be nowcasting the heck out of this... someone should! https://www.spc.noaa.gov/exper/mesoanalysis/new/viewsector.php?sector=16#

Lol thanks that's what I assumed but didn't know if I had missed something

I didn't realize that... is that just observation or their actual protocol?

HREF 12z fwiw (sorry if posted earlier), looks almost identical to NWS map Like a trail print of a dumbbelling low

What's clear is this is still in flux We watch for a LBSW, where SW = SNE... as is, very close to consolidating around the western low faster, more consistent with what we're seeing at mid/upper levels, and we're back to the 0z solutions

Yep captures then stalls east of Cape... I think surface looks same or slightly better than 12z

18z NAM still with the dual low at 18h but looks a tic north... this may hold or even be slightly better when captured

Just catching up, seems I was blissfully away from guidance all morning. At quick glance, don't have any grand insights except to say that the circled vorticity associated with the runaway SLP was even more prominent at 0z Euro. Weird, and suggests this is a highly sensitive and close pivot in outcome. Maybe an issue of how much the energy rounding trough can dominate. H5 maps tell us this should track closer, but all guidance trends tell us otherwise. Stressful forecast for the periphery. Sounds cliche, but we nowcast.

Blizzard warning up for all east coastal Mass including Boston

Yeah I'd be surprised if blizzard warning is limited to southeast MA... winds >30 knots for hours seem likely for much of coastal eastern MA

Not worth much at this point, but will be interesting to trend... 0z HREF:

Exactly how I feel. The 0z NAM (and continuing that trend) was not completely unrealistic, so glad Euro held.

Definitely is, and from the best guidance We're in a great spot Jerry 0z NAM showing its usual spasticity Harvey's confidence was great to see