Sunday Thunder Threat

The heat will gradually be on this weekend, with 90 degree weather hitting the region on Saturday and perhaps lingering for as many as five days into the middle of next week.   Sunday originally looked like the hottest day of the stretch, with an outside chance of 95 degrees as soon as yesterday's computer guidance, in advance of a cool front that is poised to slide on through the region with a thunder threat.   The timing of the front looked originally to be late afternoon and early evening with thunderstorms popping up along and with the weak frontal boundary. Some hints are showing up that the timing could end up being a bit earlier on Sunday.

Most computer guidance from this afternoon is suggesting either a midday or afternoon thunder threat...some of which could be severe. It doesn't look like an all day event and thunderstorms could fire on a line (frontal boundary) and slide southeast.  Whether the storms fire at 12, 2, or 5 is always an exercise in "to be determinedness" but the odds of some thunder on Sunday are pretty good.

Regarding the weekend as a whole, it will be very warm as temperatures will be in the 90 degree range or the low 90's for the weekend.   Not the hottest on record (no 100 degree weather in sight) but it's still a "typical" summertime weekend around the Delaware Valley, with Sunday the one day with a thunder threat.