Friday, April 19, 2013

Muggy With Late Day Thunder Threat

A warm, muggy day in the Delaware Valley also includes a threat for rain and thunder later on. It looks like the threat increases from the west after 6 PM and gets into the city towards 8 PM, perhaps later.  The higher resolution NAM (above) shows the threat moving into the western suburbs around 8 PM or so...the main threat will be this evening, with the majority of the day generally dry although muggy and murky.

Expect a mostly cloudy sky on the whole for the day, with some breaks in the clouds from time to time ahead of the frontal boundary and the thunderstorm activity that will move through tomorrow night.  There could be a few rogue showers or storms that pop ahead of the main action in the afternoon hours as the airmass is unstable and humid but the odds are any activity will be isolated and generally north and northwest of the city.

Highs tomorrow warm into the 70's away from the ocean, warmest along I-95 and down Route 13 through Dover and Sussex County in Delaware, with cooler temperatures along the Shore where 60's are likely.  There could be some localized fog along the boardwalks at times through the day as moist air pushes in off of the cooler ocean.   Winds will also be a factor as southerly winds increase to between 12 and 22 mph, gusting perhaps to over 30 at times.

We'll have more on this evening's storms later on this morning.