MU's Current Conditions: (at 19:53) Temp: 46 F | Dew Point: 29 | Wind: - calm mph
SPECIAL WEATHER DISCUSSION (Updated twice weekly, but more often when storms threaten.)

* Warm & Cold Battle for Early March Dominance *

2:30pm Monday, February 27:
February will conclude as the warmest on record in Lancaster with an incredible departure from normal of around 9 degrees. Despite a cool Sunday and Monday, yet another impressive push of warm air will arrive Tuesday into Wednesday (March 1st). High temps on Tuesday will return to the 60s, and on Wednesday we will rise into the within a few degrees of the record (77 in 1972). While a few sprinkles or brief showers are possible later Tuesday into very early Wednesday as the warm front moves through, it's later Wednesday afternoon into the evening hours that another round of gusty showers/storms (perhaps isolated severe) will move through. Wednesday from around 3:00pm or 4:00pm until about 9:00pm is the window of concern for round of fast-moving strong storms.

The period Thursday through Saturday will then turn colder as two cold fronts move through. Thursday will begin windy and cool, but end partly sunny and seasonable. A small clipper system looks on track to cross the Commonwealth early Friday, likely dropping a couple inches of snow over parts of western PA...and perhaps a period of light snow or rain-snow mix here during the morning hours. A shot of Canadian air will then take hold into Saturday with highs Friday and Saturday only in the upper 30s to low 40s--this would actually be a few degrees below normal, for a change!

Next week looks like yet another temperature roller coaster with warm air surging back in with highs in the 50s on Sunday afternoon and the low 60s on Monday, before another cold front drops through Monday night or Tuesday. Beyond that, a significant pattern change--ridging in the Western US and a blocking high near Greenland--will likely make for several days (perhaps more) of seasonably cold conditions...and just maybe a final chance of snow. (Or not!) --Horst

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