Last night’s showers that interrupted the Phillies game were forecast to occur, but the chances were low probability. Low probability clearly doesn’t mean no probability. The showers were the result of an upper air cyclonic flow and a cool pool of cold air aloft, resulting in instability and lift.
Today’s NAM model continues with the possibility of instability showers developing between 2 PM and 7PM. —- expected to be widely scattered and somewhat more numerous in central NJ.
In fact, the NAM lifted index is forecast to be somewhat more unstable today, so scattered showers are likely, although not every area will see them.
The non-meteorological start of the summer season begins this weekend, and by Monday, it should feel like summer. A lingering reminder of the spring is still with us in the form of an upper air cyclonic flow, and this upper air feature will move away by Sunday.
Before then, the pool of cold air in the upper atmosphere may cause instability showers to form Saturday afternoon, although the models keep the higher likelihood to our north.
Beautiful weather– plenty of sunshine– for Sunday and Monday.
A warm front will move through this evening, with showers and perhaps a thunderstorm.
Milder temperatures and higher dew points follow. A generally unstable pattern through Saturday as a developing upper air trough allows instability showers especially Saturday afternoon. Things should dry out on Sunday, but the upper air trough may allow clouds to form Sunday afternoon.
A new website for the weatherguy! Checkout theweatherguy.net/blog for the latest Philadelphia Weather Forecasts
This is my third incarnation of the weatherguy.net’s website. The original, posted in 1997 used a static html format. In 2004, I moved the format to blosxom, a free scripting blog format. Blosxom was a big advance for me, but updating the website with pictures was more difficult than I ever would have guessed. I’ve been interested in exploring WordPress, from WordPress.org. I thought using it would be difficult, but it’s really a piece of cake to install. I’m looking forward to broadcasting my forecasts on the web with this new format!