A developing low pressure system in the Gulf Of Mexico will move up the East Coast on Wednesday bringing a wind-swept rain to Long Island. The storm has been brewing in the Gulf over the past several days and has gathered plenty of tropical moisture. The available moisture will result in locally heavy rain across all of Long Island, especially Wednesday afternoon and Wednesday evening. 2"-3" of rain will be possible with up to 4" falling in some areas.
It seems lately on Long Island that when we see rainy weather, it lasts for days. This has certainly been the case since the end of summer because of a blocking pattern in the atmosphere. This blocking pattern does not allow much east to west motion of weather systems causing us to sit under the same weather systems for long stretches of time. The past week or so, we lucked out under the nice part of the blocking pattern with high pressure. Sunny skies, comfortably cool nights, and warm days all made for a classic run of fall weather.
Saturday morning starts on the chilly side with temperatures in the lower 50s. With plenty of sunshine throughout the day, highs will likely reach the upper 70s. This pattern continues through Monday as high pressure holds steady over the northeast. A bit warmer for Sunday and Monday with highs in the lower 80s under sunny skies.
The unsettled pattern exits the region today leaving way for a beautiful stretch of autumn weather leading into the weekend. Brilliant sunshine paired with dry conditions and mild afternoon temperatures will round out the next few days. So whether it be pumpkin picking, raking leaves, or just some good old outdoor exercise I think we are in for a treat.
Overnight temperatures may be cool so do keep an eye on any sensitive vegetation and if necessary move it inside! Keeping up with our almanac it is worthy to note 2011 has been the 7th wettest year on record so far in the NYC area.
Several lines of strong thunderstorms affected Long Island today. The first band hit eastern Suffolk County with torrential downpours and high wind gusts during the early afternoon. That line of storms caused localized flash flooding across the east end. The second line of storms moved in along a cold front just in time for the evening rush hour. That line of storms wreaked havoc on the evening rush by causing flooding that snarled traffic on the LIE and Grand Central Parkway. A lightning strike also knocked out LIRR service between Penn Station and Jamaica.
A large ridge in the jetstream is allowing unusually warm air northward into Long Island. Today, Islip tied a record high of 79 degrees. But not only was it warm, but it was humid as well. The humidity made it feel more like the low to mid 80's, especially across the north shore. The one side effect to the humid conditions will be dense fog in spots tonight, so watch out for low visibility late tonight and early tomorrow morning. And if you like the warm weather, you are in luck. Expect a similar day on Tuesday with highs in the upper 70's.
You wouldn't know it by today's warm and humid weather, but we have some much cooler temperatures approaching the region for the upcoming weekend. A cold front will pass through on Thursday bringing with it a few scattered showers, and ushering in a taste of autumn by Friday. Highs will struggle to reach the upper 60s and nightime lows will drop into the 40s! A spectacular weekend for all festivals that will be going on. Sunshine and dry conditions will be the icing on the cake!
Hurricane Irene dropped an average of 5-10 inches of rain across the region. Now nearly a week and a half later we are once again dealing with large amounts of rain. Although it has not come down as fast or as heavy it still continues to cause issues. Northern New Jersey once again will see river flooding, and here at home on the island we can expect flooding in poor drainage areas, low lying surfaces, and basements. The rain will slowly come to an end and dry out by Friday. We expect a fairly nice weekend with partly cloudy skies.
High pressure continues to hold strong over Long Island into the overnight hours. Partly cloudy skies are expected with lows near 60. Tomorrow starts out nice with increasing clouds in the afternoon. Slight chance for an isolated storm later in the day with highs in the upper 70's.
Labor Day weekend looks a bit stormy for Sunday and Monday as a cold front approaches from the west. Temperatures likely to reach the lower 80's.
From the FiOS1 Weather Center....Be safe, and enjoy your weekend!!!!