Sunday, December 18, 2011

Weather Rewind, December 11-17, 2011

Last week's temperatures ended up 3.9 degrees above average.    Even though it didn't seem too terribly warm on the whole, the power of a a warm Thursday (sixteen degrees above average) and a warm "midnight high" on Friday (twelve degrees above) was enough to provide the temperature departure for the week.  Both days featured highs in the upper 50's and lows in the 40's, enough to skew the fact that the balance of the week was actually 0.1 degrees below average and that both weekend days this week, Sunday and Saturday, were arguably the most winter-like of the week around here.

Rainfall for the week was modest...just 0.01" from showers with the front on Thursday.  Much of the region was dry on the whole as well.

That relative dearth of rainfall, of course, is in stark contrast to the year overall.  2011 is the wettest year on record in Philadelphia, Allentown, Harrisburg, and a few other locations through the Mid Atlantic.  Rainfall that has run 150%-200% of average since January 1st is commonplace in many locations.  You read that right...not just the month...the entire year....when average rainfall is 41.48" getting over 150% of that means a heckuva lot of rain on the whole.   The folks in Texas and Oklahoma wouldn't mind seeing some of our twenty inch surplus in rainfall -- rainfall year-to-date in Houston is running 44% of average and Amarillo, TX is running 29% of normal during 2011.