The average high for today at Philly Int'l is 40 while the average low is 26; we were over twenty degrees BELOW average for both the high and low thanks to this Arctic air. The high today was just 13 degrees(set at 3:59pm) while the low was a new record at 4 above(at 8:59am) shattering the old record of 8 set back in 1988!
Granted that was the ambient temperature as a gusty west-northwest wind between 25-30mph with gusts over 40mph provided a wind chill between 10-15 below zero. It was definitely not a great day to be outdoors for any extended period of time, but if you tried to do the "boiling water in the air" trick or the "frozen bubble" deal I can understand if you wanted to see science come alive.
Overnight it will be clear and cold once again with lows in the middle and upper single digits with a west-northwest wind subsiding to around 10-15mph; now I don't think we'll reach record lows overnight as the low for Philly International is 2 set back in 1970. Some other local record lows for overnight are as follows:
Atlantic City Int'l(Pomona): 2(1981)
Wilmington, DE: 0(1970)
After a cold start Wednesday morning we'll have high pressure pushing eastward so we'll actually "warm" toward the middle 20s with a lighter west wind. Come Thursday we'll jump over the freezing mark with highs in the middle and upper 30s! Thursday night there will be a little impulse coming through at night with rain changing to some wet snowflakes(with little to no accumulation). Friday will be in the middle 40s after the weak piece of energy pushes away and then for the weekend we will flirt with 60 before a cold front comes through and provides some rain Saturday night into Sunday.
The rest of the seven day can be seen any time at www.scottderekwx.com/forecast.html.