Thank the Great Lake weather bomb for producing widespread gales, flooding rainfall, category 2 hurricane-force gusts on top of Mount Washington and one heck of a temperature swing up the East Coast between Friday morning and this morning.

The storm which cut power to hundreds of thousands through the Ohio Valley across the Great Lakes, Northeast and particularly Ontario, Quebec and Atlantic Canada continued to deepen on it’s northeastward journey and winds on it’s southeast flank blew powerfully out of the SSW driving early morning temperatures into the 60s, even low 70s before sunrise Friday which for Nov 1 was between 25-30F above normal from West Virginia to New England. Winds of 40-55 mph blew through the main I-95 urban corridor causing a commuting headache, causing many trees and power lines to come down, it also caused scaffolding in Manhattan to collapse which injured 4.

Once the system’s front pushed through with heavy rain and wind, much colder air wrapping around the backside of the low was pulled into the Northeast from Hudson Bay and within 12-24 hours of the front passing, snow flakes were flying over the higher elevations of the interior Northeast.

Here’s the culprit for the Northeast and Mid-Atlantic going from steam to between Friday and this morning.

This storm generated low level winds of 45-55 mph across the Ohio Valley and throughout the lower elevations of the Mid-Atlantic and Northeast but 70+ over the higher elevations of the Appalachians and Northeast with a gust to 130 mph recorded on top of Mount Washington, NH while 70 mph winds generated 14 foot waves on Lake Ontario.

60+mph winds caused big issues throughout the St Lawrence Valley including the city of Montreal.

Here are some top win speeds recorded over Ontario and Quebec Friday according to The Weather Network

Atlantic Canada

Yesterday morning turned cold with lows dipping to 10 degrees on top of Mount Washington, NH while there were widespread 30s throughout the wider region but as a cold high slide south and east, so the cold air aloft, clear skies and relatively light inland winds, did their work in the lengthening nights.

This morning hands down wins as the coldest throughout the Northeast and East since last spring with widespread 20s outwith the main urban centers with pockets of teens showing up too.

Check out this graphic showing the temperature difference between 4pm Fri and this morning at 7am. Produced by Ralph Fato (@WeatherNut27)

Another great comparison graphic below shows the pressure difference between Friday and this morning with the passing of the low followed by a cold and impressive 1040mb surface low which dropped down in the storm’s wake.

The temperature has fallen to at least 7 degrees at Saranac Lake, NY and at least 9 degrees on top of Mount Washington, NH. A few spots within sheltered valleys of Vermont, New Hampshire and western Maine, may well have seen single digits this morning.

As well as the widespread frost, freeze and chill, there was also a perfect sunrise, check out this splendid view of Manhattan this morning via Camnet.

Another shows the sun rising over Lower Manhattan.

Here’s a stunning view pre-sunrise over Washington DC with an aircraft taking off from Reagan National.

Here’s a look at those cold numbers captured around 7am ET.

Note the teens around Bradford, PA and southern New York state as well as widely over interior New England.

Check out this chart for around the same time of day (7am, ET) back on Friday morning. Temperatures were some 50-55F WARMER than this morning! Some spots that dipped in the teens at 5-7am this morning were in the mid to upper 60s Friday.

It won’t warm much through today despite the sunny skies throughout the region.

The GFS shows mid to late afternoon temperatures for most below 45 degrees with likely some pockets of 30s in prone cold spots over Pennsylvania, western Maryland and the Virginias. Expect widespread 30s over Northern New York and New England away from the coast.

Another cold night tonight before moderation takes place.

If you haven’t already, be sure to read my Official US Winter Forecast 2013-14 and also yesterday post for a detailed look at SST’s ENSO and other important factors which tie into my long range ideas for the US.

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