The Haves and the Have Nots

A storm like this is always a pain. A phenomenal band of snow is producing 1″-2″ per hour rates across a large chunk of Connecticut. On the northwest side of that band it’s barely flurrying!

snow1

We’ve bumped up totals for those in the band and bumped down totals outside of the band. The band is behaving pretty much as expected. Strong frontogenesis is really the focus for the heavier snow and the circulation is producing upward motion through a very cold part of the cloud (around -15C) which is ideal for producing big and fluffy dendrites. You’ll be able to sweep this stuff with a broom!

Note heavier snow lines up with 850-700 mb frontogenesis

Note heavier snow lines up with 850-700 mb frontogenesis

The thermally direct circulation created as a response to frontogenesis occurs on the warm side of the strongest frontogenesis which is exactly where it’s occurring. Eventually this frontogenesis will pivot and move north and east. Anyone under that pivot point will get croaked with snow!

In the Connecticut River Valley from Hartford on north a northerly drain of dry air is literally eating up some of the snow. It’s been a long process moistening the boundary layer with dry air draining south but it appears that the snow is finally picking up in my backyard. The RAP model shows good snow growth continuing from the surface up through 600mb through tomorrow morning with pockets of lift near in the dendritic growth zone.

22z RAP time/height cross section for HFD

22z RAP time/height cross section for HFD

Here’s the bottom line before I get ready for bed (2 a.m. alarm clock tomorrow)!

chart_3 (6)

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s