Showing posts with label Patriots. Show all posts
Showing posts with label Patriots. Show all posts

Sunday, January 18, 2015

Northern Vermont Still In The Bulleye For Snow

Here's the latest snowfall projections through
Monday from the National Weather Service
in South Burlington, Vermont. Click
on the map to make it bigger and easier to see.  
It still looks like it's going to snow quite a bit over a good chunk of Vermont and parts of northern New Hampshire tonight and Monday.

Given the highly iffy state of affairs in the northern New England atmosphere as a storm approaches, forecasts for snowfall are remarkably the same as they were last evening.

Northern Vermont looks to be in the sweet spot for snow with this one.

Go a little to the west, and precipitation won't be all that heavy. Go a little east into New Hampshire and you get into the mixed precipitation.

If forecasts hold, it looks like the heaviest snow in Vermont will fall north of a V-shaped line from St. Albans, down to a little below Montpelier then back up to the St. Johnsbury area.

That's the zone covered under a winter storm warning, meaning a snowstorm is pretty much considered imminent. That's an upgrade from the winter storm watch of last evening. A watch means "maybe, but we're not really all that sure yet."

The spine of the Green Mountains south of Barre all the way down to the Mount Snow Ski Area in southern Vermont looks like they'll get a good five to ten inches of snow as well.

Most other areas of Vermont are under a winter weather advisory for wet, heavy snow, but accumulations will only be in the 2 to 6 inch category. This somewhat lighter zone includes Burlington, Middlebury, Rutland, and White River Junction, Vermont and Plattsburgh, N.Y.

The areas around Bennington and Brattleboro in far southern Vermont will only get a dusting to an inch or two of slush. But watch out east of the Green Mountains in the lower Connecticut River valley. Freezing rain will fall or a time today.

Even though watches have been upgrades to winter storm warnings and advisories, I still caution there is a high potential for forecasts to be wrong.

It'll get warm enough this afternoon for precipitation to start as rain in most of Vermont. The question is, at what point tonight will it get cold enough for the precipitation to change to snow? If the changeover comes later than expected, obviously less snow than forecast would accumulate.

Far northern New Hampshire is under a winter weather advisory for three to five inches of snow, mixed with sleet, freezing rain and rain. Kinda yucky there.

Deeper valleys haven't seen the south winds that have been scouring out warm air.  That means some of the deeper valleys, especially across the Northeast Kingdom of Vermont, much of New Hampshire and the northwestern half of Maine, could see freezing rain this afternoon when precipitation arrives.

As of 7 a.m this morning, with calm winds, it was minus 2 in Berlin, N.H., so it would take a lot for warm air to scour down to that valley. Meanwhile, Burlington, Vermont, where a south wind has been blowing all night, gusting to 40 mph at times, it was 25 degrees as of 7 a.m.

The precipitation will change to plain rain in much of New Hampshire and most of Maine tonight, but the rain might still freeze on contact with the ground even if the air temperature is above freezing. Road and other surfaces are cold from the stretch of subzero weather we've had, so things could stay icy overnight.

I'd also note that any rain that falls in Vermont before a changeover to snow could also freeze on roads and sidewalks, even if temperatures are above freezing.

By the way, some of those overnight Champlain Valley winds have been quite strong, gusting over 40 mph in many places, including around my house in St. Albans, Vermont. Quite a few small branches blew off the trees around my house overnight. Those winds should lighten up later today.

Freezing rain is falling across much of New Jersey, eastern Pennsylvania, Westchester County, N.Y and Connecticut this morning, and there have been lots of accidents reported. It'll go over to plain rain there later, but meanwhile, if you're in that area, stay off the roads until Sunday afternoon.

All hell is breaking loose down there this morning. Parts of the New Jersey Turnpike, and most of the bridges over the Delaware River were closed as of 8 a.m. this morning due to ice and many car crashes.

The freezing rain is moving into Massachusetts this morning. So if you're approaching Boston from the west for the New England Patriots game later today, delay your trip a bit or be very, very careful.

Frankly, you'd be better off watching the AFC Championship game between the Patriots vs. Indiana Colts this evening on television, rather than at Gillette Stadium in Foxborough. A drenching rain, with temperatures only in the low 40s is expected at game time. There might even be some thunder and lightning with this. Yikes!

The snow and/or rain should taper off across New England on Monday as the storm rolls pretty quickly up toward the Canadian Maritimes.

Then, for the rest of the week, we revert back to the quiet and cold weather pattern that we've seen for most of January.

Saturday, January 17, 2015

New England Storm Forecast Update: Damn Tricky Business Here

The National Weather Service in South Burlington,
Vermont has taken an initial stab at forecasting
how much snow is coming, but this map is
BIG Time subject to change. (Click on the image to
make it bigger and easier to read.)  
Up here in Vermont, the National Weather Service in South Burlington has this evening opted to hold off on upgrading a winter storm watch for Sunday night and Monday into a warning.

They have good reason to be hesitant. This storm has a super high forecast bust potential. Vermonters hoping for a good dump of snow better not start celebrating yet.

There's still a very good chance of four to 10 inches of snow in Vermont, but there are a lot of complicating factors.

The National Weather Service forecast discussion is illuminating as to why the entire staff in South Burlington will be bald by Monday because they're pulling their hair out over this one.

Here are the problems:

1. Temperatures will be margional for snow, especially during the first part of the storm. It looks like many areas will start off as rain. But will the precipitation change over to snow as soon as the heavier precipitation comes in?

If not, who gets rain, and which areas stay cold enough for snow?  The higher elevations, of course, would be more apt to get snow, but what about the Champlain Valley? The valleys around Rutland?
How far do you have to go east of the Green Mountains before you encounter mostly rain?

A degree or two off in the forecast for any layer of the atmosphere, not just the surface, and current forecasts would be wrong.

2. Where will the heaviest precipitation be? There's a sharp cutoff expected between heavy snow or rain to the east, and very light precipitation to the west. Right now, it looks like the heaviest precipitation will be from the Champlain Valley east.

Even if forecasters are off by as little as 20 miles as to how far west the heavy precipitation will get, some areas will miss out on the heavy snow, or, in the case of eastern New York, unexpectedly get dumped on.

By the way, a 20 mile error in this regard is practically inevitable at this point.

3. These kinds of storms often form what is called a deformation zone, which is an area of heavier precipitation on the western edge of a storm that stays put for a few hours. Will a deformation zone set up? If so where?

4. Will mountains block the moisture feed in some areas? That's especially a risk west of the Green Mountains and even more so in Vermonts Northeast Kingdom, where New Hampshire's White Mountains could block the moisture.

You can see why Vermont is still under an uncertain winter storm watch. Who the hell knows what this storm is going to do?

The going forecast now, definitely subject to change, calls for about a foot of snow in the high-ish elevations in far north central Vermont, especially around Jay Peak.

Northwestern Vermont, especially areas at least five miles east of Lake Champlain, are pegged to get 6 to 10 inches of snow.

The Champlain Valley south of Franklin County, and central Vermont are up for four to eight inches.

Southwestern Vermont would get 1 to 4 inches of snow, and only an inch or two will come down in the Connecticut River Valley south of St. Johnsbury

As I noted, this snow forecast is BIG TIME subject to change.

By the way, things are just as uncertain in northern New Hampshire. They might get a big snowstorm, they migh not.

Down in Massachusetts, the NFL Patriots vs. Indiana Colts game, scheduled to start at 6:40 p.m. Sunday, promises to be a really unpleasant slog in the weather department.

Rain could come down pretty hard, and temperatures will only be in the low 40s. There's even a chance of thunder. However, there's still a chance the heaviest weather could wait until after the Patriots game. We'll wait and see on that one.

After the storm, the weather looks very easy to forecast, at least by comparison. It'll be a little colder than normal through most of next week, with just chances of light snow here an there across northern New England