Sunday, May 29, 2011

Hot and Humid, T-Storms to Break The Heat

A heat advisory has been issued starting Monday at 12:00 PM EDT for Camden, Gloucester, Mercer, and Northwestern Burlington Counties. An excessive heat watch has been issued from Tuesday at 12:00 PM for Camden, Gloucester, Mercer, and Northwestern Burlington Counties through Wednesday Night.

For the advised and warned counties, heat indices will top out around 100 degrees for several hours on Memorial Day and around 105 degrees on both Tuesday and Wednesday. Temperatures will likely be around 92 to 95 degrees each day. The coastline could be a few degrees cooler with the cool ocean still influencing the beaches, but with a more southwesterly wind component, this may not happen on at least one of these days of the interior heat wave. While it will be equally hot in some of the counties not under an alert for heat, one must keep in mind that the criteria is lower in the urbanized areas due to the census data suggesting lower income around Trenton and Camden. Unfortunately, many in the alerted counties do not have access to air conditioning. Also, the temperatures drop slower in this area at night due to the urbanized environment as pavement doesn’t allow for ideal cooling.

Thunderstorm chances:

A shallow cold front on Monday will bring the chance for isolated pop-up thunderstorm activity. The models have been decreasing the chance for a thunderstorm after ratcheting it up on Saturday. Any thunderstorm that can form will have plenty of access to strong instability due to strong warming. The storms will not only have a poor focus, but they will also have to fight a cap that will be in place. Chance is about 20 to 30 percent.

Tuesday, heat and humidity related isolated thunderstorm. Chance is about 10 to 20 percent.

Wednesday, a strong cold front arrives to break the heat. This is the best chance of a thunderstorm of the next seven days. These thunderstorms have a decent shot of producing hail and strong winds, perhaps to severe limits. The chance of a thunderstorm is about 60 percent.

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