Sunday, May 15, 2011

Drenching Showers and Thunderstorms



Showers and thunderstorms are going to impact Western New Jersey for the overnight hours, with an isolated pop-up thunderstorm elsewhere. Otherwise, fog could develop due to the very moist atmosphere and previous rain today in many areas. There could be a few dense pockets of fog.

There is a chance of showers and thunderstorms on Monday. The chance of thunderstorms ranges between 40 and 50 percent, so less than today. It appears the most favorable area will be in the northern half of New Jersey. But a cell could develop virtually anywhere. Once any stratus burns off, some sunshine may develop. It will be warm and humid. A localized flood threat exists with slow moving thunderstorm development…but the coverage is not expected to be widespread. With sunshine, some thunderstorms may once again contain hail and strong wind gusts.

Drenching showers and thunderstorms are a certainty on Tuesday as the moisture train becomes enhanced with new surface low development. Flash flooding is quite possible in some portions of New Jersey. Some areas may see several inches of rain. The chance of rain is near 100%.

Wednesday is once again another day of drenching showers and thunderstorms. Several inches rain may once again occur. At this present time, some creeks and streams with some larger river basins may begin to see some significant flooding. The Raritan River basin is of great concern, but even some of our basins not affected as severely this spring may not be able to take on the amount of rain that is expected. The chance of rain is near 100%.

Two to four inches of rain may fall Tuesday and Wednesday over a widespread area. There could be localized pockets of 4 to 7 inches of rain if the best dynamics play out, especially near terrain influence.

Scattered showers and thunderstorms are forecast to linger for Thursday and Friday. These will be scattered, but with the amount of rain expected prior to Thursday, any additional half inch to an inch of rain in thunderstorms could be very problematic.

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