OBS-Discussion General" 1-2" rainfall 2PM today (7/30)-2PM Fri 8/1/25 with small pockets 4-7" possible but may be just off the edge of our NYC subforum

[donsutherland1]

For reference:

Central Park's daily rainfall record for July 31 is 2.29", which was set way back in 1889.

Central Park has seen 0.50" or above hourly amounts five times on July 31: 

0.88", 1925 and 1942
0.81", 2016
0.74", 1961
0.56", 1996

It remains to be seen whether Central Park will see 1.00" or more hourly rainfall today for the first time on July 31. July 28-30 and August 1-4 have all seen 1.00" or more hourly rainfall.

[JonClaw]

WPC now includes NYC in the moderate risk for excessive rainfall.

[Neblizzard]

Storms are exploding near Allentown and portions of WNJ.  Slow movers as well:  it’s going to be a long day for many locales.   6-7 inches of rain isn’t out of the question for areas just southwest of NYC. 

[winterwx21]

1 hour ago, Stormlover74 said:

yeah 13z still targeting us but who knows. it will bounce around for sure

 

Now 15z no longer targeting our area, but who the heck knows. Radar certain looks good with lots of action in eastern PA and a few small cells popping up in Hunterdon County. 

[Stormlover74]

4 minutes ago, winterwx21 said:

Now 15z no longer targeting our area, but who the heck knows. Radar certain looks good with lots of action in eastern PA and a few small cells popping up in Hunterdon County. 

Everything's shutting down like a blizzard or hurricane is coming

[steve392]

Bright blue clear skies starting to become cloudy to my west and northwest.  Radar popping off. 

[LibertyBell]

16 hours ago, donsutherland1 said:

Low pressure moving along a nearly stationary front produced heavy thunderstorms with flash flooding in parts of the region. A snippet from the NWS:

000 
TTAA00 KNYC 311600
FFWNYC
NYC047-059-081-103-NYZ501-311800-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1200 PM EDT WED JUL 31 1996
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
FLASH FLOOD WARNING AND SPECIAL MARINE WARNING EFFECTIVE UNTIL
200 PM EDT FOR THE PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST NEW YORK
 
   ...KINGS COUNTY...NASSAU COUNTY...QUEENS COUNTY
   ...WESTERN SUFFOLK COUNTY
   ...AND THE ADJACENT COASTAL WATERS
 
A FLASH FLOOD WARNING IS NOW IN EFFECT FOR WESTERN SUFFOLK...
NASSAU...QUEENS...AND KINGS COUNTIES UNTIL 2 PM.
 
A SPECIAL MARINE WARNING IS ALSO IN EFFECT FOR THE COASTAL
WATERS FROM SANDY HOOK TO MORICHES INLET UNTIL 2 PM.
 
A STRONG LINE OF THUNDERSTORMS CONTINUES TO EFFECT THE WARNING
AREA PRODUCING TORRENTIAL RAINS...AND DANGEROUS LIGHTNING. THESE
THUNDERSTORMS HAVE CAUSED WIDESPREAD STREET...ROADWAY...AND
BASEMENT FLOODING.
 
AT 1200 PM THE HEAVIEST RAINS ARE OCCURRING OVER NASSAU COUNTY AND
THE COASTAL WATERS SOUTH OF JONES BEACH. THE STORMS WILL EFFECT
WESTERN SUFFOLK COUNTY AND ADJACENT WATERS SHORTLY. CONDITIONS WILL
SLOWLY IMPROVE OVER QUEENS AND KINGS COUNTY BY 1 PM AS THE LINE OF
THUNDERSTORMS MOVES EAST.
 
THESE STORMS HAVE BEEN PRODUCING HEAVY FLOODING RAINS AND FREQUENT
DANGEROUS LIGHTNING AND COULD PRODUCE GUSTY WINDS AND SMALL HAIL.

Thanks Don, I was wondering how Central Park missed out on it.

This could be the event I remember when my area got 4-5 inches of rain and NYC got little or nothing.

The storms stalled over our area for 4 hours.  We got an inch per hour for 4 hours.

Do you have local PNS rainfall totals for this event Don?

I remember it happened in the afternoon after a sunny morning.

[winterwx21]

15 minutes ago, Stormlover74 said:

Everything's shutting down like a blizzard or hurricane is coming

Ridiculous, but I guess you can understand our area being extra nervous after having the incredibly bad luck of having 2 of our worst storms ever in a week and a half period earlier this month. 

[jm1220]

Meandering seabreeze boundary today, maybe some storms can fire along it. Otherwise we wait for how organized the NJ storms are as they come east from the city. 

[donsutherland1]

17 minutes ago, LibertyBell said:

Thanks Don, I was wondering how Central Park missed out on it.

This could be the event I remember when my area got 4-5 inches of rain and NYC got little or nothing.

The storms stalled over our area for 4 hours.  We got an inch per hour for 4 hours.

Do you have local PNS rainfall totals for this event Don?

I remember it happened in the afternoon after a sunny morning.

Unfortunately, I have no PNS data.

[MorristownWx]

Just south of me in Morristown going to get some crazy training storms. 

[Stormlover74]

8 minutes ago, MorristownWx said:

Just south of me in Morristown going to get some crazy training storms. 

Seems like 78 corridor could be in for the worst

[SnoSki14]

2 minutes ago, Stormlover74 said:

Seems like 78 corridor could be in for the worst

Maybe just south. Storms in PA look to target central NJ

[Stormlover74]

2 minutes ago, SnoSki14 said:

Maybe just south. Storms in PA look to target central NJ

Yeah the main batch but a line looks like it wants to form from Somerset to LI

[mgerb]

1 minute ago, SnoSki14 said:

Maybe just south. Storms in PA look to target central NJ

Agree. Can see a (differential heating/outflow) surface boundary extending ENE from into central Somerset. I suspect storms will form/travel along the boundary. My hunch is from there south has the highest threat. 

[weathermedic]

Suffolk County starting to light up on radar now

 

[jm1220]

28 minutes ago, jm1220 said:

Meandering seabreeze boundary today, maybe some storms can fire along it. Otherwise we wait for how organized the NJ storms are as they come east from the city. 

Storms firing now around Smithtown/Hauppauge area on the boundary. 

[Picard]

My area is set to be split again.  I've got a stiff breeze and cloudy skies but nada is heading this way at the moment, unless more pops along a favorable line.  I could play basketball on the front lawn right now.

[Stormlover74]

Severe Thunderstorm watch issued for much of the area

[RockawayRowdies]

5 minutes ago, Picard said:

My area is set to be split again.  I've got a stiff breeze and cloudy skies but nada is heading this way at the moment, unless more pops along a favorable line.  I could play basketball on the front lawn right now.

Yeah.. same here in Rockaway Mall/Borough area.

[jm1220]

6 minutes ago, Stormlover74 said:

Severe Thunderstorm watch issued for much of the area

Slight risk for South Jersey Alley. 

[Cyg]

Just had some random lightning strike here in New Providence from that storm near the Rt78/287 interchange. Was just out cleaning the gutters real quick and probably would have crapped myself if I was up on the ladder. lol

Edit: and a second one. No rain or anything to speak of yet.

[MorristownWx]

So close… going to slide just south of me 

[ForestHillWx]

Rumbling at the new office in Berkeley Heights. 

[Picard]

It almost feels like a front just crashed through here.  It's clearing up, breezy, and I'm down to 69 from a high of 81 and the dewpoint has also dropped from 72 to 64.  

[David-LI]

Severe thunderstorm warning just west of NYC

[steve392]

53 minutes ago, jm1220 said:

Meandering seabreeze boundary today, maybe some storms can fire along it. Otherwise we wait for how organized the NJ storms are as they come east from the city. 

Any maps showing where the sea breeze is? 

[JonClaw]

2 minutes ago, David-LI said:

Severe thunderstorm warning just west of NYC

Cell has a small hook too

[Stormlover74]

Lots of thunder

[jm1220]

2 minutes ago, steve392 said:

Any maps showing where the sea breeze is? 

If you happen to have RadarScope you can see the convergence line on radar across LI.