If you saw our forecast earlier this evening, you'll see our prediction for the coming Memorial Day weekend (as of now) indicates the probability of highs around 90 degrees on Memorial Day. The Euro and GFS have both waffled on this possibility for the past couple of days, with the Euro in this afternoon's run showing the potential across portions of the region for Monday afternoon.
Over the coming Memorial Day weekend, we'll have the potential for thunderstorms as a frontal boundary slouches southward into the Delaware Valley from the north. This front will slow as it approaches the region, then stall out on Sunday across the region, before retreating northward on Monday. We should be able to get through most of Saturday in a pretty dry fashion although an isolated thunderstorm or two may pop over the Poconos or Central Pennsylvania.
Sunday may be the most thundery day of the weekend with the front nearby and a disturbance tracking east along the boundary. We could see scattered to more widespread thunderstorm activity. The best chances for this look to be north of town but it all depends on where the front sets up shop.
Monday looks to be the warmest of the three holiday weekend days -- high temperatures could exceed 90 in spots around the region (click the map below to see the Euro's thought for Monday at 5 PM). There could again be a few pop up thunderstorms but odds favor fewer storms than Sunday.
If we hit 90 this weekend, it would be the first 90 degree day of the year. Our first 90 each of the last two years was on May 26th and in 2009, it was on April 25th. It's the "unofficial" open to summer so what "better" way to get into summer with a first 90 of the year!