Alert archive / Connecticut / Flash Flood Warnings in 2026
Flash Flood Warning 36, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 3, 2026, 9:57 AM EDT for Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut. It was in force for 3 hr. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 3, 2026, 9:57 AM EDT (13:57 UTC)
- Expired
- Aug 3, 2026, 12:54 PM EDT
- In force
- 3 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lower Connecticut River Valley Planning Region, CT, Naugatuck Valley Planning Region, CT, Southeastern Connecticut Planning Region, CT
The radar
The Brookhaven radar (KOKX), 83 km from the middle of the area, began a volume at 13:57 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 3, 11:30 AM EDT | FLASH FLOOD | 1 Ne Saybrook Manor, CT | Old Saybrook Fire Dept responded to a report of a vehicle stranded in flood waters in the Indiantown Section, photos verify the car in flood waters. |
| Aug 3, 12:10 PM EDT | FLASH FLOOD | 3 W Niantic, CT | Rising creek resulted in water going into a business in East Lyme with public works on scene. |
| Aug 3, 12:20 PM EDT | FLASH FLOOD | 1 Sw Niantic, CT | Several roads reported with over 2 ft of water, including Atlantic Street. |
| Aug 3, 12:21 PM EDT | FLASH FLOOD | 1 Wsw Niantic, CT | Over 2 feet of water on Black Point Road in Niantic making one direction impassable. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this flash flood warning; the first came 93 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 2.0 hours before the alert went out and 83 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1129 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 250 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.7
The text
As transmitted.
766
WGUS51 KOKX 031357
FFWOKX
CTC007-009-011-031700-
/O.NEW.KOKX.FF.W.0036.260803T1357Z-260803T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
957 AM EDT Mon Aug 3 2026
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Middlesex County in southern Connecticut...
Southeastern New Haven County in southern Connecticut...
New London County in southern Connecticut...
* Until 100 PM EDT.
* At 957 AM EDT, Doppler radar indicated heavy downpours and
thunderstorms producing heavy rain across the warned area. Between
1 and 2.5 inches of rain have fallen over the last 6 hours.
Rainfall rate of 1 to 2 inches in 1 hour are likely. Additional
rainfall amounts of 1 to 3 inches are possible in the warned area
through 1pm. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Jewett City, Middletown, Norwich, New London, Guilford,
Colchester, Clinton, East Hampton, Groton, Old Saybrook, Durham,
Salem, Chester, Mystic, Branford, Waterford, East Lyme, Ledyard,
North Branford and Griswold.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 4165 7251 4158 7247 4159 7239 4161 7233
4164 7233 4171 7224 4166 7216 4164 7179
4142 7180 4141 7184 4134 7183 4132 7185
4129 7201 4130 7216 4124 7239 4126 7241
4124 7254 4126 7259 4123 7283 4164 7254
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
NV1 follow-up statement
650
WGUS71 KOKX 031654
FFSOKX
Flash Flood Statement
National Weather Service New York NY
1254 PM EDT Mon Aug 3 2026
CTC007-009-011-031704-
/O.CAN.KOKX.FF.W.0036.000000T0000Z-260803T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex CT-New Haven CT-New London CT-
1254 PM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING IS CANCELLED FOR MIDDLESEX, SOUTHEASTERN NEW
HAVEN AND NEW LONDON COUNTIES...
The heavy rain has ended. Flash flooding is no longer expected to
pose a threat, however isolated minor poor drainage flooding is
possible until 300 PM EDT. Please continue to heed any remaining
road closures.
&&
LAT...LON 4165 7251 4158 7247 4159 7239 4161 7233
4164 7233 4171 7224 4166 7216 4164 7179
4142 7180 4141 7184 4134 7183 4132 7185
4129 7201 4130 7216 4124 7239 4126 7241
4124 7254 4126 7259 4123 7283 4164 7254
$$
JCWhat forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New York, NY wrote its last area forecast discussion before this flash flood warning went out at Aug 3, 7:52 AM EDT, 2 hours 5 minutes earlier. Its key messages:
- 1) Periods of showers with embedded thunderstorms through late this afternoon into early this evening. Rainfall will be heavy at times. A Flood Watch is in effect for northern New Jersey and NYC through early this evening. 2) High surf and high rip current risk expected for the ocean beaches through this evening. 3) Unsettled weather at times once again Wednesday and Thursday this week.
Area forecast discussion, Aug 3, 7:52 AM EDT, 2 hours 5 minutes before
Area Forecast Discussion
National Weather Service New York NY
752 AM EDT Mon Aug 3 2026
.WHAT HAS CHANGED...
NYC added to flood watch.
&&
.KEY MESSAGES...
1) Periods of showers with embedded thunderstorms through late
this afternoon into early this evening. Rainfall will be heavy
at times. A Flood Watch is in effect for northern New Jersey and
NYC through early this evening.
2) High surf and high rip current risk expected for the ocean
beaches through this evening.
3) Unsettled weather at times once again Wednesday and Thursday
this week.
&&
.DISCUSSION...
.KEY MESSAGE 1...
No big changes in the forecast today as an upper trough and
associated surface frontal system interact with anomalously
high precipitable water (PW). Much of the guidance, as is
supported by latest mesoanalysis, support PW values falling
just short of 2.5". This will not be too far off from the all-
time high of 2.62" August 19, 1955.
00Z HREF and WPC Urban Rain Rate Dashboard (URRD) show the peak
rainfall window across the area this morning into early this
evening. Both show about a 30 percent membership of hourly
rainfall rates of 1"+. Once you go higher than that, the
probabilities fall off to almost 0. That being said, the
combination of a moisture-laden airmass along with large scale
synoptic lift, points to several hours of moderate to heavy
rainfall along with possible south to north training. As such,
NYC was added to the flood watch for NE NJ. Elsewhere, 1-hour
FFG is nearly 2 inches, so have held off. There could still be
isolated instances of flash flooding outside the watch area. WPC
still has most of the area under a slight risk of excessive
rainfall.
Coverage will likely decrease from west to east this afternoon
as the vertical wind profile begins to veer to the SW with
drier air moving in. A cold front will then pass through late
this afternoon into early this evening.
SPC also has the area under a marginal risk for severe weather
with a 5% for the wind threat. Mid level lapse rates are
generally less than 6c (weak), but there is moderate CAPE and
decent vertical wind shear to support something isolated.
High pressure and dry weather is on tap for Tuesday.
Scattered showers and thunderstorms return Wednesday through
Friday as the western Atlantic ridge retrogrades, sending the
dissipating frontal boundary into the area.
.KEY MESSAGE 2...
Both Wavewatch and NWPS guidance have long period southerly
swells of 8-11 ft 9s today which supports a high surf advisory
for the ocean beaches and dangerous rip currents in the surf
zone. Surf will range from 6 to 10 ft, highest across the
Suffolk County ocean beaches.
There could be another high risk of rip currents for Suffolk
ocean beaches Tuesday with otherwise a moderate risk of rip
currents for the ocean beaches. For Tuesday, the winds will be
decreasing to near 5-10 kt from northerly in the morning to more
southerly in the afternoon. Ocean southerly swells decrease
Tuesday to near 4 ft with near 7 second period.
.KEY MESSAGE 3...
Scattered showers and thunderstorms return Wednesday through
Thursday as the western Atlantic ridge retrogrades, sending the
dissipating frontal boundary into the area. PW values will close
in on 2 inches. Localized heavy rainfall will be possible.
&&
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
A slow moving frontal system will impact the terminals today.
A cold front will pass through late this afternoon into this
evening.
Showers/tstms with MVFR/IFR cond expected today. Coverage and
intensity may be more sparse than fcst north/west of the NYC
metros until late afternoon with the cold frontal passage.
S winds gusting to 20-25 kt mainly along the coast should shift
NW then N after cold fropa, with flight cat also quickly
improving to VFR after fropa.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
AMD likely for changing flight cat and tstm chances.
.OUTLOOK FOR 12Z TUESDAY THROUGH FRIDAY...
Tuesday: VFR.
Wednesday through Friday: MVFR or lower flight cat at times in
showers/tstms. S winds 15-20kt on Thu.
Detailed information, including hourly TAF wind component
forecasts, can be found at: https:/www.weather.gov/zny/n90
&&
.MARINE...
Small craft conditions are forecast for the ocean and some
eastern non-ocean zones today with south winds of 15 to 25 kt
and gusts up to 30 kt. Highest winds will be across the eastern
ocean waters. Challenge is how much of the winds aloft get down
to the surface. A few gusts to 35 kt on the eastern ocean
waters can't be ruled out. Small craft conditions will likely
continue for the ocean through tonight as the winds veer more to
the SW and seas remaining elevated around 5 to 7 ft. Sub
advisory conditions should develop thereafter.
&&
.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...Flood Watch through this evening for NYZ072>075-176-178.
High Risk for Rip Currents through this evening for NYZ075-080-081-
178-179.
High Surf Advisory until 9 PM EDT this evening for NYZ075-080-
081-178-179.
NJ...Flood Watch through this evening for NJZ002-004-006-103>108.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ331-
332-340-345.
Small Craft Advisory until 6 AM EDT Tuesday for ANZ350-353.
Small Craft Advisory until midnight EDT tonight for ANZ355.
&&
DISCUSSION...DW
AVIATION...BG
MARINE...DWHazardous weather outlook, Aug 3, 2:07 AM EDT, 7 hours 50 minutes before
Hazardous Weather Outlook National Weather Service New York NY 207 AM EDT Mon Aug 3 2026 NJZ002-004-006-103>108-NYZ072>074-176-040615- Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen- Western Essex-Eastern Essex-Western Union-Eastern Union- New York (Manhattan)-Bronx-Richmond (Staten Island)-Northern Queens- 207 AM EDT Mon Aug 3 2026 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... This Hazardous Weather Outlook is for northeast New Jersey and southeast New York. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && This Hazardous Weather Outlook provides a summary of potential widespread hazardous weather events that may reach NWS warning criteria. Most long fused NWS watches, warnings, and advisories in effect are highlighted. Please refer to the latest NWS forecasts for weather not meeting NWS warning criteria. NYZ075-178-040615- Kings (Brooklyn)-Southern Queens- 207 AM EDT Mon Aug 3 2026 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... ...HIGH SURF ADVISORY IN EFFECT FROM 6 AM THIS MORNING TO 9 PM EDT THIS EVENING... ...HIGH RIP CURRENT RISK IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH THIS EVENING... This Hazardous Weather Outlook is for southeast New York. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. High Rip Current Risk. High Surf Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. && This Hazardous Weather Outlook provides a summary of potential widespread hazardous weather events that may reach NWS warning criteria. Most long fused NWS watches, warnings, and advisories in effect are highlighted. Please refer to the latest NWS forecasts for weather not meeting NWS warning criteria. CTZ005>012-NYZ067>071-078-079-177-040615- Northern Fairfield-Northern New Haven-Northern Middlesex- Northern New London-Southern Fairfield-Southern New Haven- Southern Middlesex-Southern New London-Orange-Putnam-Rockland- Northern Westchester-Southern Westchester-Northwest Suffolk- Northeast Suffolk-Northern Nassau- 207 AM EDT Mon Aug 3 2026 This Hazardous Weather Outlook is for southern Connecticut and southeast New York. .DAY ONE...Today and tonight. There is a chance of localized to scattered instances of flash flooding into early this evening. There is a chance for flash flooding late tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && This Hazardous Weather Outlook provides a summary of potential widespread hazardous weather events that may reach NWS warning criteria. Most long fused NWS watches, warnings, and advisories in effect are highlighted. Please refer to the latest NWS forecasts for weather not meeting NWS warning criteria. NYZ080-081-179-040615- Southwest Suffolk-Southeast Suffolk-Southern Nassau- 207 AM EDT Mon Aug 3 2026 ...HIGH SURF ADVISORY IN EFFECT FROM 6 AM THIS MORNING TO 9 PM EDT THIS EVENING... ...HIGH RIP CURRENT RISK IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH THIS EVENING... This Hazardous Weather Outlook is for southeast New York. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Rip Current Risk. High Surf Advisory. There is a chance for flash flooding late tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && This Hazardous Weather Outlook provides a summary of potential widespread hazardous weather events that may reach NWS warning criteria. Most long fused NWS watches, warnings, and advisories in effect are highlighted. Please refer to the latest NWS forecasts for weather not meeting NWS warning criteria. ANZ331-332-335-338-340-345-350-353-355-380-383-385-040615- Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River- Long Island Sound East of the Mouth of the Connecticut River- Long Island Sound West of New Haven CT/Port Jefferson NY- New York Harbor-Peconic and Gardiners Bays- South Shore Bays from Jones Inlet through Shinnecock Bay- Moriches Inlet NY to Montauk Point NY out 20 NM- Fire Island Inlet NY to Moriches Inlet NY out 20 NM- Sandy Hook NJ to Fire Island Inlet NY out 20 NM- Waters from Moriches Inlet NY to Montauk Point NY from 20 to 60 nm- Waters from Fire Island Inlet NY to Moriches Inlet NY from 20 to 60 nm- Waters from Sandy Hook NJ to Fire Island Inlet NY from 20 to 60 nm- 207 AM EDT Mon Aug 3 2026 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && This Hazardous Weather Outlook provides a summary of potential widespread hazardous weather events that may reach NWS warning criteria. Most long fused NWS watches, warnings, and advisories in effect are highlighted. Please refer to the latest NWS forecasts for weather not meeting NWS warning criteria.
In the hours before
Local storm report, Aug 3, 7:33 AM EDT, 2 hours 24 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
733 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0519 AM Non-Tstm Wnd Dmg Hawthorne 41.10N 73.80W
08/03/2026 Westchester NY Dept of Highways
Tree Down on Taconic State Parkway
southbound south of Exit 2 - Sprain Brook
State Parkway (Mount Pleasant) left lane
blocked.
&&Local storm report, Aug 3, 7:34 AM EDT, 2 hours 23 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
734 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0638 AM Non-Tstm Wnd Dmg 2 NNW Armonk 41.15N 73.73W
08/03/2026 Westchester NY Dept of Highways
DOT Tree Down on NY 128 northbound at Hollow
Ridge Rd (New Castle) alternate lanes of 2
lanes blocked.
&&Local storm report, Aug 3, 7:39 AM EDT, 2 hours 18 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
739 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0519 AM Flash Flood Hawthorne 40.96N 74.16W
08/03/2026 Passaic NJ Broadcast Media
Hawthorne fire department reports numerous
water rescues in the area.
&&Local storm report, Aug 3, 7:46 AM EDT, 2 hours 11 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
746 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0741 AM Flash Flood 2 NNW Jersey City 40.74N 74.07W
08/03/2026 Hudson NJ Dept of Highways
Flooding on US 1&9 Truck Route southbound at
Charlotte Circle, all lanes closed.
&&Local storm report, Aug 3, 9:16 AM EDT, 41 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
916 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM Flash Flood 1 SE Highland Falls 41.35N 73.95W
08/03/2026 Putnam NY Dept of Highways
Flooding on NY 9D southbound between Old
Manitou Road (Garrison) and Kings Dock Road
(Garrison) alternate lanes of 2 lanes
blocked.
&&Local storm report, Aug 3, 9:44 AM EDT, 13 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
944 AM EDT Mon Aug 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 AM Flash Flood 1 SE Highland Falls 41.35N 73.95W
08/03/2026 Putnam NY Dept of Highways
Corrects previous flash flood report from 1
SE Highland Falls. Flooding on NY 9D
southbound between Old Manitou Road
(Garrison) and Kings Dock Road (Garrison)
alternate lanes of 2 lanes blocked.
&&The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 3:44 AM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region | 3 hr |
| Aug 3, 4:43 AM EDT | Flash Flood Warning | OKX | Greater Bridgeport Planning Region | 3 hr |
| Aug 3, 5:24 AM EDT | Special Weather Statement | OKX | 51 min | |
| Aug 3, 5:32 AM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 3 hr |
| Aug 3, 6:03 AM EDT | Areal Flood Advisory | OKX | Naugatuck Valley Planning Region | 3 hr |
| Aug 3, 6:31 AM EDT | Special Weather Statement | OKX | 44 min | |
| Aug 3, 8:25 AM EDT | Areal Flood Advisory | OKX | Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region | 2 hr |
| Aug 3, 12:48 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region | 2 hr |
Nearby
Flash Flood Warnings in Connecticut, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.