wxsniss

2F 7:27pm 1F 7:40pm

2F 7:27pm

4F 6:50pm Close to 3/hr 0 by 8:30pm?

8F At least we can say we've reached rates of 1-2 / hr for something this winter

12F to 9F in past hour, we're plummeting Delayed arrival definitely helping Steepest 925 advection looks incoming over next 4 hours

14F to 12F in last 45 min

KMWN 1849Z 290 78G92KT –37/–37 ..."Winds will continue to increase through the rest of the day, with winds speeds reaching 80-100 mph by Friday afternoon. Model guidance is also indicating that the tropopause could dip below the summit Friday night. As a result, winds will become more compressed in the lowest levels of the atmosphere, leading wind speeds to increase even further overnight Friday. The highest wind speeds will occur sometime between Friday night into Saturday morning as wind speeds ramp up to 100-115 mph with gusts up to 135 mph. Higher gusts are not completely out of the question, with the possibility for winds to peak as high as 140 mph very early Saturday morning. Wind chills will be incredibly low and very dangerous, particularly above treeline. Wind chill values will start around 60 below to 70 below Friday morning and will continue to fall even further over the rest of the day. The coldest air from the center of the polar vortex will move through the region Friday night which will also coincide with the period of strongest winds. As a result, wind chill values will drop to a range of 100 to 110 degrees below zero Friday night. I want to emphasize the danger of this cold. In these brutally cold conditions, the risk of hypothermia and frostbite will be exponential. These frigid cold conditions will quickly rob you of body heat, with the possibility that frostbite could develop on exposed skin in under a minute. Even small mistakes can prove deadly, with a simple slip or fogged goggles leading to a potentially life-threatening situation. In this type of weather, rescue services will have a difficult time responding to any emergency effectively." https://www.mountwashington.org/experience-the-weather/mount-washington-weather.aspx

~12am-4am 1/27/2015? Consolidated into a more meridional megaband later that morning

Opening bid from Box… looks like a 70:30 GFS:NAM blend Almost a redux of today’s totals, with more of a latitude component and no CCB jack east

KBOS still holds futility record over 1936-37 As we anticipated, North Shore cleaned up with that band PNS excerpts: ...Suffolk County... Logan AP 2.1 in 0717 PM 01/23 ASOS ...Essex County... 2 ESE Peabody 6.5 in 0645 PM 01/23 Amateur Radio Gloucester 6.0 in 0654 PM 01/23 Trained Spotter 1 SE Lynn 6.0 in 0600 PM 01/23 Amateur Radio Newburyport 5.0 in 0535 PM 01/23 Trained Spotter ...Middlesex County... Ashby 6.3 in 0545 PM 01/23 Amateur Radio 1 WNW Pepperell 5.6 in 0505 PM 01/23 Trained Spotter Lexington 5.2 in 0545 PM 01/23 Public 1 ESE Framingham 5.0 in 0610 PM 01/23 Public 1 SW Lexington 4.7 in 0601 PM 01/23 Trained Spotter ...Plymouth County... 1 SE Cohasset 2.5 in 0640 PM 01/23 Public ...Worcester County... 4 NW Ashburnham 7.5 in 0638 PM 01/23 Amateur Radio Ashburnham 6.3 in 0621 PM 01/23 CO-OP Observer 2 ENE Fitchburg 6.1 in 0618 PM 01/23 Public 1 NE Lunenburg 6.0 in 0614 PM 01/23 Public ...Providence County... 2 ENE Burrillville 3.0 in 0542 PM 01/23 Trained Spotter 1 S Smithfield 2.5 in 0624 PM 01/23 Public ...Tolland County... 1 SSW Coventry 1.9 in 0635 PM 01/23 Public 5 E Rockville 1.8 in 0400 PM 01/23 Amateur Radio 2 NNW Bolton 1.5 in 0400 PM 01/23 Amateur Radio

Awaiting PNS, wonder if KBOS passed 1936-37 (all time ratter) total today… still ahead of 2011-12 in futility

Nice! Hoping that propagates downstream, visibilities currently > 1 mile closer to Boston The crappy BL temps are more apparent when snowgrowth and rates are poor Metro area might pull off another 0.5-1" as this last band rotates in

By far, the best report I just received related to this snowstorm: "he refuses to fall asleep for his nap, he is too excited about the snow" (referring to my 2.5-year-old son)

Agree I posted about that earlier... looks like best lift is now below DGZ vs. better crosshair earlier And correlated with KBOS ticking up to 33.8 (an effect, not a cause)... and streets clearing up quickly

I think North Shore has a shot at >4" Snowgrowth in Boston metro (now in between the best bands) not as good now and visibilities have increased... KBOS ticked up to 33.8/32 Anticipating at least another 0.5-1", band over ORH will rotate through

0.25 mile vis KBOS!!! Mesos ftw, the heavy rates overcame the crappy BL Roads are whitening Positive bust of yore to buck the season tenor

Best snowfall of season for Boston metro, 0.5-0.75 mile visibility Hours of this ahead

~0.75 mile visibility in Boston and in a first for the season for the city: roads are actually starting to whiten

32 / 30 KBOS, just in time for best rates entering for next few hours!

Mesos ftw 2-4pm window consistently advertised for metrowest / Boston area

30-35 dBZ entering 495 belt strong finish in the making

< 1 mile vis in Fenway area Roads still just wet obs + upstream radar consistent with a strong finish 2" seems very doable but even whitened roads would feel like a victory

We had a bit of white rain mix during that dry lull in Boston metro but back to snow with better returns I like what I see upstream and short term mesos, at least for snowfall rates 2-4pm

Complete changeover to snow in Brookline, seeing some wetbulbing at KBOS Ground is starting to whiten Heaviest 2-4pm per HRRR/RAP/HREF eastern SNE, will actually give a semblance of winter

12z HREF doubles down on finish for eastern SNE... Band of 0.5-1" / hr swings through ORH east ~2-4pm