The next snowstorm? 12-21-2017 update

in weather •  7 years ago 

Potential next snowstorm : 12-28-2017 to 12-30-2017
Magnitude : potential for >20in of snow

Scenario 1 : from Kansas to North Carolina to Cape Cod thru NJ

Maximum totals : up to 2 ft in Virginia, Maryland and Delaware

Scenario 2 : from Nebraska to Maine and as South as North Virginia

Maximum totals of over 2 ft in Central Pennsylvania

GFS Model, showing the scenario 1 storm

COMMENTS

Both GFS (American model) and ECMWF (European model) are converging toward a snowstorm scenario for Thursday/Friday/Saturday/Sunday next week
The storm will be generated from a clash between warm moist air from the Gulf of Mexico, meeting a cold and dry air from Canada
As this is a forecast beyond 1 week there is a relatively high degree of uncertainty

  • Chance of having a storm during that time frame : very high
  • Chance of having a storm bringing substential amount of snow : high
  • Chance of having a storm bringing major amount of snow (above a foot) : moderate
  • Chance of having snow in NYC : moderate

As the 2 scenarios can show, there is still uncertainty on the path of the storm

map credits :
Snowfall forecasts : courtesy of "instantweathermaps.com"
GFS forecast model : courtesy of "wunderground.com"

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