Long Island Weather Central

Jun 28
6:12pm, Jun. 28, 2011

This is the first week most Long Island schools have off for the summer, and the weather couldn't be nicer! We kicked off the week with a gorgeous Monday. Sunny skies and low humidity made it a great day for any outdoor activity. Today was more humid, but the thunderstorms held off making it another sunny, warm day. A few thunderstorms will be possible tonight, but those storms will exit by tomorrow morning leaving us in a gorgeous weather pattern for the rest of the week. Wednesday and Thursday will be in the low to mid 80's with plenty of sun and low humidity. More humidity returns Friday but we'll make it 5 for 5 with plenty of sunshine.
Of course, everyone is looking ahead to the holiday weekend, and it looks like the weather will cooperate. Saturday will be warm and humid with hazy sunshine. A Few scattered storms will be possible Saturday evening. Then we crank up the heat on Sunday and Monday, July 4th. Both days will see hazy sun and highs near 90 degrees. We'll watch for the possibility of a few scattered storms on Monday evening, but hopefully they will hold off until after all the fireworks shows.

Jun 23
7:18pm, Jun. 23, 2011

Another heavy band of showers and thunderstorms moved across Long Island today. The heaviest rain fell right across the north shore affecting communities such as Manhasset, Port Washington, Bayville, Oyster Bay, Huntington, Northport, Smithtown, Stony Brook, and Port Jefferson. The east end got in on the action as well with rain rates of 2-3" per hour. The ground is now saturated and we are expecting more thunderstorms tomorrow, so the National Weather Service has extended the flash flood watch through late tomorrow night.

Fortunately, by the weekend the weather will be much better. Just an isolated shower or thunderstorm will be possible Saturday. On Sunday, will will enjoy sunny skies and less humidity.

Jun 22
7:33pm, Jun. 22, 2011

A stubborn frontal system hung up over Long Island will team up with a slow-moving storm in the Great Lakes to bring locally heavy showers and thunderstorms to the area. The storms will be likely tonight through much of Thursday prompting the National Weather Service to issue a flash flood watch. The watch is posted in Nassau County through late tomorrow night.

The thunderstorms will be capable of producing frequent lightning, gusty wind, and small hail. The biggest threat, however, will be the heavy rain as we have a very humid airmass in place. Rain rates of 2-3" per hour will not be uncommon with these thunderstorms. By Friday, the storms will be a bit more scattered, but still a threat especially during the afternoon.

Jun 21
7:58pm, Jun. 21, 2011

Summer arrived today at 1:16PM when the sun's direct rays reached their northernmost point on the globe, 23.5 degrees north of the equator. That latitude line is also known as the Tropic Of Cancer. Because of that, we had our longest day and strongest sun rays of the year. The good news is, the warmest months of the year are still ahead. The bad news is, the days will now start to get shorter.
It certainly felt like summer with the increased humidity. That increased humidity will bring a good chance of thunderstorms to the forecast on Wednesday right through Friday. An isolated storm will even be possible on Saturday. Finally, we will see less humidity and better weather on Sunday.

Jun 15
4:56pm, Jun. 15, 2011

A northwesterly wind Tuesday night and Wednesday brought dry, Canadian air to Long Island. When there is very little moisture in the air, it is easy for the air to cool down at night and warm up during the day. The result was a gorgeous Wednesday! We woke up to comfortably cool temperatures in the lower 50's. The strong June sun went to work and temperatures this afternoon climbed about 25 degrees into the upper 70's to low 80's.

Jun 9
7:56pm, Jun. 09, 2011

High temperatures today varied greatly across Long Island. A seabreeze brought cooler temperatures in the upper 70's to low 80's to the south shore and east end. In northern Nassau County and northwestern Suffolk County, the breeze took a while to show allowing temperatures to soar into the mid 90's. Combined with the high humidity, it felt closer to 100 degrees in the north shore communities.
In addition to the heat, we also saw heavy thunderstorms as a cold front moved into the area earlier this evening. The worst of the storms hit the Hudson Valley and Connecticut with 60-70 MPH wind gusts and large hail. The storms were still strong enough to produce 40-50 MPH wind gusts and frequent lightning by the time they hit Long Island around 7:00PM this evening.

Jun 7
6:55pm, Jun. 07, 2011

The next 2 days will be the hottest Long Island has seen since early September. High temperatures will reach the low to mid 90's on average. The key to the hot weather, as is always the case on Long Island, will be the wind direction. A westerly wind will limit the afternoon seabreeze and allow the temperatures to soar.
But, will it be record heat for this time of year? The record high for Islip on both Wednesday and Thursday is 95 degrees. The forecast high for Wednesday is 92, and the forecast high for Thursday is 94. Those highs would put us within reach, but just short of the records. It all depends on how long the west wind holds off the afternoon seabreeze.

Jun 6
6:21pm, Jun. 06, 2011

Technically speaking, a heat wave is 3 days in a row with high temperatures of 90 degrees or higher. The last time Islip recorded a high temperature of 90 degrees or higher was September 1, 2010. On that date, the high temperature was 93 degrees. That also coincided with the end of the last official heat wave recorded at Islip. There was a four day stretch from August 29 - September 1 where the high temperature was at least 90 degrees.

We are certainly in for a hot, humid week on Long Island this week. Tomorrow, highs will reach the mid to perhaps upper 80's. The hottest temperatures will arrive on Wednesday and Thursday, when temperatures will likely reach the lower 90's. High humidity will drive the heat index numbers near 100 degrees during that time as well. Then on Friday, slightly cooler air will arrive behind a cold front. In order for an official heat wave, temperatures that day will have to reach 90 or higher.

Jun 2
7:01pm, Jun. 02, 2011

When we woke up this morning, the air felt crisp and dry for the first time in a long time. The sharp cold front that brought severe weather to the northeast yesterday also brought a big change in airmasses. Yesterday, we had dewpoints near 70 degrees. Any dewpoint above 65 is quite humid, so needless to say it was an uncomfortable day. Between midnight and 3:00AM last night, the dewpoint dropped from the upper 60's to the lower 50's, a huge drop in humidity!

With clear skies and dry air in place tonight, we are in for a nice, cool night. Lows will be mostly in the 50's, with parts of eastern Long Island dipping into the 40's.

May 31
9:07pm, May. 31, 2011

Hurricane season begins Wednesday, June 1 in the Atlantic basin. The NOAA Climate Prediction Center's official hurricane outlook is predicting another active hurricane season. In a normal year, there are 10 storms that reach tropical storm force, or have winds of 39 MPH or greater. Of those storms, 5-6 become hurricanes with winds of 74 MPH or greater. 1-3 of those hurricanes become major hurricanes with winds of 111 MPH or greater.

This year's prediction calls for nearly double those numbers with 12-18 named storms, 6-10 hurricanes, and 3-6 major hurricanes. The big question is, will any of those storms make landfall? It is impossible to say this early, as the exact steering currents of the atmosphere can't be forecast far in advance.

You already trust FiOS1 Meteorologists Brian Fitzgerald and John Heyman for your on-air forecasts. Now they’re bringing you more info on weather as it affects your day-to-day life in our new weather blog. Check back daily for storm updates, fun weather facts and more.


What's On Now & Next