June 7-8, 2013 Storm Updates

Occasional updates will be posted below on the heavy rain event from the remnants of Tropical Storm Andrea through today and tonight. Updates will also be posted on Twitter.

Links:

Yesterday’s forecast discussion
Twitter updates
5-Day Forecast

 


Final storm rain totals in NYC: (Updated 8 AM)

Central Park – 4.77″
JFK Airport – 4.42″
LaGuardia – 4.22″

 


Blog Updates: (Regional radar from the National Weather Service)

12:15 AM Storm Update

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As of 12 AM, post-tropical storm Andrea was located just SE of southern New Jersey. Intensity has not changed much since the last update, and the low continues to quickly move to the northeast.

Rain totals so far since the storm started on Thursday afternoon range from 1.5 to 3 inches in northern NJ and SE NY, and 3 to 4 inches in NYC, Long Island and southern CT. The highest total so far is in Bridgeport, CT with 4.39 inches; Central Park is currently at 4.02″.

Over the last hour, the heaviest rain moved out of most of the area except for eastern Long Island and southern CT, which are still under moderate to heavy rain at this time but will also see rainfall rates lightening up over the next hour. Light to moderate showers will continue until 2-4 AM, when the low pressure moves through the area with possible enhancements to the rainfall rate.

This is the last storm update for tonight. The next forecast discussion will be posted on Saturday evening, covering the additional showers and thunderstorms expected for Monday and Tuesday and the lack of heat showing up in the longer range pattern.


11:20 PM Storm Update

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As of 11 PM, according to the NHC, post-tropical storm Andrea was located over SE Delaware. Sustained winds are near 45 mph with a minimum pressure of 997 mb, and the storm is moving to the NE at 35 mph.

According to the latest radar posted to the left, rain is lightening up over NYC, northern NJ and SE NY; more showers are in the process of developing over New Jersey, and light to moderate rain, locally heavy, will continue until 2-4 AM, with another 1/4 to 1/2 inch, locally higher, expected until then. Meanwhile, heavy rain and thunder continue in Long Island and southern CT with a band of heavy storms training over Suffolk county, producing rainfall rates up to 1-2″/hour. Rain will also begin to lighten up in Long Island within the next hour and southern CT in 1-2 hours, with light to moderate rain, locally heavy, continuing until 4 AM.

10:10 PM: Rain To Start Ending Soon

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As of 10 PM, post-tropical storm Andrea was located over SE Maryland. Intensity has not changed much since the last update, and the low continues to quickly move to the northeast.

Heavy rain continued to fall across the area over the last hour, with flooding reported in parts of the area, especially in Long Island and southern CT where the heaviest rain rates of the storm were observed this evening. Isolated totals near to locally over 4 inches have been reported in Long Island so far, with totals otherwise generally between 2 and 3.5 inches.

The latest radar to the left shows rain still covering the area, with some reports of thunder in NE NJ, NYC and Long Island. The heaviest rain is expected to end after 11 PM in northern NJ and NYC, continuing for another 1-2 hours in Long Island, SE NY and southern CT; lighter rain will fall afterwards, although rain is likely to intensify again after at least 12-2 AM as the low pressure and the surrounding rain bands, currently in Maryland, reach the area. Most of the rain will end by 2-4 AM, with dry conditions returning for Saturday with much warmer temperatures, back into the mid 70s to low 80s, a significant change from today’s unseasonably cold high temperatures in the low 60s due to the rain.

9:10 PM: More Rain Tonight

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As of 8 PM, the low pressure associated with post-tropical storm Andrea was located over SE Virginia. Sustained winds are near 45 mph with a minimum pressure of 996 mb, and the low is quickly moving to the northeast at 35 mph.

As of 9 PM, rain totals across the area range from 1.5 to 2 inches in NW NJ and SE NY, 2 to 3 inches in NYC and northern NJ, and 2.75 to 3.5 inches in Long Island and southern CT. The highest total in the area so far is Bridgeport, CT with 3.67″, followed by Shirley, NY with 3.52″.

The initial round of heavy rain over Long Island and CT has moved out, although additional heavy rain is developing and expanding over NYC, northern NJ and SE NY, with rates up to 1/2 inch per hour. Meanwhile, another band of heavy rain is located over the Long Island Sound, and will spread into southern CT within the next 1/2 hour. Moderate to heavy rain will continue over the area until at least 11 PM, with temporarily lighter rain afterwards until the low pressure moves through the area around 12-4 AM, when another round of rain, possibly heavy, is expected. Afterwards, conditions will become drier as the low pressure quickly moves out of the region. From now until the end of the storm, another 3/4 to 1.5 inch of rain is expected, locally higher.

6:00 PM: Rain, Flooding Continue

**Storm updates were paused earlier today due to technical difficulties. As these issues have been fixed, storm updates will now be resumed through tonight.**

radar2As of 5 PM, Andrea is now a post-tropical cyclone, meaning it has lost its tropical characteristics. The low pressure is located near NE North Carolina with sustained winds of 45 mph, minimum pressure of 996 mb, and is moving northeast at 28 mph.

Over the last few hours, moderate to heavy rain fell across the area, with radar estimates and surface based observations showing rain totals so far generally between 1 and 2 inches across most of the area. The heaviest rain is currently located over Long Island and southern CT, with rain temporarily lighter over NYC and northern NJ. In Long Island and CT, heavy rain will continue for the next few hours, potentially becoming lighter over Long Island within an hour or two. In NYC, northern NJ and SE NY, additional periods of moderate to heavy rain will continue through the late evening as thunderstorms currently over Delaware make their way NNE into the area. Rain will continue until the center of the low pressure reaches the area around 12-4 am, with rain then expected to gradually become lighter until ending in the mid overnight hours.

9:30 AM: Heavy Rain Approaching

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As of 8 AM, Tropical Storm Andrea was located over South Carolina. Andrea has sustained winds of 45 mph, minimum pressure of 996 mb, and is moving northeast at 28 mph. Andrea is expected to lose tropical characteristics late this morning into the early afternoon, with its remnants continuing to track up the East Coast just offshore. Rain initially spread into the area last night, starting west of NYC during the late afternoon hours and east of NYC later overnight. Latest radar estimates show rain totals so far generally under 1/4 inch in Long Island and southern CT, 1/4 to 1/2 inch in SE NY, and 1/2 to 1 inch in NYC and northern NJ.

Forecast Update: As the latest radar above shows, a band of moderate rain is currently focused over NYC, northern NJ, SE NY and Connecticut, with steady light to moderate rain to continue through at least 12-2 PM. After that point, heavy rain currently located south of Pennsylvania will reach the area, producing moderate to heavy rain for the rest of the afternoon and evening, including Long Island as well which so far has not seen much rain. Between 8 PM and 2-4 AM, Andrea’s remnant low pressure will reach the area; there is the possibility of a brief break in the rain around the late evening hours, although additional heavy rain is expected to continue through at least 2-4 AM, gradually ending from south to north. Rain totals are generally expected to end up between 2 and 3 inches across the area, locally as high as 4 inches. Wind will mostly remain light, out of the east at 5-15 mph.

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