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Snow Threats Next Week Could Be Anything or Nothing!

We are enjoying a rather cold afternoon in South Central Pennsylvania with some sunshine and temperatures in the 30s. Tonight will be a cold night with lows in the teens under clear skies. Temperatures will begin to moderate on Friday with highs back into the 40s and Saturday looks like sun and arriving clouds with highs into the 50s as a cold front approaches. This brings a chance for showers later Saturday night into Sunday. That is the easy part.

As if forecasting snow isn't difficult enough we have two situations next week that bear some watching but they are the sorts of systems that are almost impossible to forecast especially the first one for Tuesday. We have a wave coming out of the Northeastern Gulf of Mexico that moves up the coast offshore. We will have rain showers on a frontal boundary Sunday as it moves through. That is a no brainer. Then we will watch the wave of low pressure develop as it moves northeastward. The low might skim the coast with some rain on Monday but will be primarily offshore. The snow comes from the upper air trough that is swinging around to the coast from the Great Lakes.

The cold air to support snow with the surface low is too far west to make snow. Unless the upper trough is stronger this should not be a worry. However once the upper trough swings around Snow will develop and swing into coastal areas. This is what is known as a Norlun trough...READ MORE ON THE SNOW THREATS FOR NEXT WEEK AT METEOROLOGISTJOECIOFFI.COM


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