Several Snowfall Totals 11/27/12

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By Stephen Gode on November 27, 2012, 5:59pm Last modified: November 28, 2012, 12:28am

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The image above is the radar imagery at 5:48 pm. As of 11:46 pm, the snow has ended in most of Connecticut except some areas in Southeastern Connecticut (tapering off), but slick spots are present and developing. Drive extra cautiously for possible areas of snow covered roadways and developing black ice, which maybe hard to recognize with temperatures at or below freezing (fortunately, many temperature readings across the state are still above freezing, so there maybe limited icy spots, but some areas maybe slick all of a sudden) for the overnight and possibly into the morning commute.

Several higher snowfall totals of the 11/27 storm are:

6.0 inches in West Milford, New Jersey in Passaic County by a Skywarn Spotter at 4:38 pm 

5.0 inches in Lake Hopatcong, New Jersey in Morris County by a trained spotter at 4:00 pm 

4.7 inches in Elverson, Pennsylvania in Chester County by a trained spotter at 12:35 pm

3.5 inches in Tolland, Connecticut in Tolland County by a spotter (elev. 1000 ft) at 6:59 pm

3.5 inches in Coventry, Connecticut in Tolland County by the public (elev. 835 ft) at 6:35 pm

3.4 inches in Newtown, Connecticut in Fairfield County by the public at 5:48 pm

3.2 inches in North Foster, Rhode Island in Providence County by a NWS co-op observer at 9:05 pm

3.0 inches in Wolcott, Connecticut in New Haven County by a Skywarn Spotter at 8:00 pm

3.0 inches in Willimantic, Connecticut in Windham County by the general public at 9:33 pm

2.5 inches in Lisbon, Connecticut in New London County by a Skywarn Spotter at 4:08 pm

Note: Snowfall amounts are unofficial observations reported by the NWS and maybe rough estimates. 

Snowfall totals are not too impressive in Connecticut, because there was enough of a southerly and easterly flow initially to elevate wet-bulb temperatures, and the area of low pressure was developing rather slowly (not too significant precipitation and not really impressive mesoscale banding). There was enough warm advection in the low levels of the atmosphere to have limited snow accumulations. With this system, there is separate rather weak shortwaves in the upper levels with really no phasing taking place until the storm is out of our area. This storm could eventually strengthen potentially dramatically from digging energy around the trough when towards and into the Labrador Sea off the coast of Newfoundland and Labrador. A formable storm near the East Coast tends to be more favorable when the NAO (North Atlantic Oscillation) negative and the PNA (Pacific-North American Pattern) is positive. Currently, the NAO is slightly negative (about neutral) and the PNA is negative. So, there is limited Greenland blocking (for a rather progressive system) and there is not a great meridional flow over the contiguous United States.

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Stephen Gode

Town: North Haven, CT  

Reporting for WXedge since September 2012.

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