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Another big Sept rain event between roughly midnight Friday morning and midnight Sunday morning (bulk 9/29-30/2023)


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2 minutes ago, EWRNJ said:


Maybe not. Strong band moving west into NJ. FFW just extended until 3 pm for Union City, NJ 506fd0d2f5e769064031342dd2b7f085.jpg


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The flooding in the city is being caused by an inverted trough (IVT).  In this setup the winds are coming from different (opposing) directions on either side of the trough in the lower levels of the atmosphere.  The result is moisture present in the atmosphere is being forced to rise where the trough is setup resulting in the downpours that are being experienced.  These features are known for being prolific rain producers and as long as this one remains where it is the problems will continue.  

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14 minutes ago, Tatamy said:

The flooding in the city is being caused by an inverted trough (IVT).  In this setup the winds are coming from different (opposing) directions on either side of the trough in the lower levels of the atmosphere.  The result is moisture present in the atmosphere is being forced to rise where the trough is setup resulting in the downpours that are being experienced.  These features are known for being prolific rain producers and as long as this one remains where it is the problems will continue.  

is this the first time that a inverted trough actually produced for the city? they never seem to do...

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25 minutes ago, Maureen said:

My garage flooded, neighbors have some in their basements. 

That's terrible anytime that happens. But at least someone who experienced a flooded basement. Sort of knows what to expect. And can take preventative measures somewhat. Versus a roof leak which is hard to predict

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30 minutes ago, GaWx said:

-Note that all were between 7/3 and 10/1.

-9/1/2021: post Ida interacting with front

-9/4/1913: not directly from TC that moved W into SE US 9/3-4

-7/28/1913: frontal

-7/3/1930: offshore frontal low

-7/12/1937: frontal low

-10/1/1913: frontal low that moved offshore and later became H that hit SC 10/8

-8/10/2006: frontal

-8/21/2021: from nontropical event well ahead of Henri/not directly from it

-9/8/2004: post Frances interacting with front

-So, none directly from TC but some indirect or post TC

Below is the distribution of all 1" or greater hourly amounts by month:

image.png.e3884b3458600454942de260b4798834.png

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4 minutes ago, Rtd208 said:

It does look like the rain is trying to expand back west of the Hudson River now so places in NE NJ may start to get back into some rainfall.

Yeah for NE NJ, but our area is probably done. HRRR keeps it well north and east of Middlesex County now. We were fortunate to avoid the very heavy stuff. 

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1 minute ago, jm1220 said:

The main firehose band looks to be pivoting east very slowly. Nassau might be screwed pretty soon and my area needs to keep an eye on it too. Already 3-5” in western Nassau. 

yeah I am starting to get into it here-rain has picked up but so far it's been manageable with a steady moderate rain

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3 minutes ago, NJwx85 said:

It's not. Rain is intensifying near Paramus and filling in.

 

2 minutes ago, jm1220 said:

The main firehose band looks to be pivoting east very slowly. Nassau might be screwed pretty soon and my area needs to keep an eye on it too. Already 3-5” in western Nassau. 

 

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The jfk area is going to end up the jackpot. Not that you really want to be in this type of situation. Luckily for me I live on the first floor of a house in lynbrook, the basement which is almost the same size as my apartment was also available at the time for half what I pay, I looked at it, and thought, yeah no floods. Having lived in Long Beach during my 20s that’s an important lesson. 

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