July 10th, 2009 Forecast
Now: Skies are featuring a mix of sun and clouds and we're experiencing yet another pretty nice day in the Delaware Valley. Temperatures are generally in the mid and upper 70's, likely to top out around or just above 80. It's a very nice day and should generally continue to be one. However, there could be a couple of pop up showers north of Philadelphia that are worth mentioning on the chance that they do pop over the next few hours.Tonight: Any showers that do pop will fade away into the night as the sun sets. Skies will generally remain variably cloudy as we get a tiny bit of onshore flow and some moisture working in aloft. Temperatures will be cool but a couple of notches warmer than last night in outlying areas, with lows in the upper 50's to low 60's nearly everywhere.
Friday: Skies will feature a mix of sun and clouds through the day, with temperatures about where they have been for the last couple of days. Expect high temperatures around or just above 80 with winds becoming southerly in the afternoon. Humidity will be on a gradual increase as we go into Friday night.
Weekend Sneak Peek: Saturday will be warm(er)...how warm still remains to be seen as computer guidance continues to be stubborn with lowering temperatures (down from 90ish to low 80's on today's guidance) despite southwest winds at the surface and a pretty warm atmosphere ahead of a frontal boundary. I still think upper 80's is certainly do-able and will hold out to stubborn and optimistic hope for a warmer day. Storms will work through Saturday night, with a few storms lurking about on Sunday if the front lingers in the area like some computer guidance suggests. It won't be an all weekend washout but a few storms are certainly possible from time to time starting Saturday PM.
Nino Nudges In: NOAA says Nino conditions are going on in the Eastern Pacific, with the most recent indicator for Nino and Nina conditions showing a large jump in the MEI index from May to June. The newest MEI data reads .855, which is a jump of over .5 from May and puts the Pacific one month closer to an officially classified Nino (which can be classified as a three month period of reports of .5 or greater on the MEI).
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