Alert archive / Connecticut / Flash Flood Warnings in 2026

Flash Flood Warning 21, NWS New York, NY

July 21, 2026Greater Bridgeport Planning Region, Connecticut; Westchester County, New York

NWS New York, NY issued this flash flood warning at Jul 21, 2026, 4:12 PM EDT for Greater Bridgeport Planning Region, Connecticut; Westchester County, New York. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 21, 2026, 4:12 PM EDT (20:12 UTC)
Expired
Jul 21, 2026, 6:53 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

Counties Greater Bridgeport Planning Region, CT, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 63 km from the middle of the area, began a volume at 20:13 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 63 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2026-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2026-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1211 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

319 
WGUS51 KOKX 212012
FFWOKX
CTC001-NYC119-212315-
/O.NEW.KOKX.FF.W.0021.260721T2012Z-260721T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
412 PM EDT Tue Jul 21 2026

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Southern Fairfield County in southern Connecticut...
  Central Westchester County in southeastern New York...

* Until 715 PM EDT.

* At 412 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Additional rainfall amounts of 1 to 2 inches are possible in 
  the warned area. 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...
  Stamford, Norwalk, New Canaan, Greenwich, Westport, Darien, 
  Wilton, Bedford, Pleasantville, Armonk and Thornwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

Excessive runoff from heavy rainfall will cause flooding of urban 
areas, highways, streets and underpasses as well as other drainage 
areas and low lying spots.

If you are in a basement, be prepared to move to a higher floor.

&&

LAT...LON 4127 7354 4111 7336 4109 7334 4100 7358
      4100 7359 4099 7359 4098 7360 4114 7381

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

DBR
1 follow-up statement
381 
WGUS71 KOKX 212253 RRA
FFSOKX

Flash Flood Statement
National Weather Service New York NY
653 PM EDT Tue Jul 21 2026

CTC001-NYC119-212303-
/O.CAN.KOKX.FF.W.0021.000000T0000Z-260721T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-Westchester NY-
653 PM EDT Tue Jul 21 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN FAIRFIELD AND 
CENTRAL WESTCHESTER COUNTIES...

Heavy rain has ended and flood waters are receding. Please continue 
to heed remaining road closures.

&&

LAT...LON 4127 7354 4111 7336 4109 7334 4100 7358
      4100 7359 4099 7359 4098 7360 4114 7381

$$

Goodman

The office that day

Everything else NWS New York, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 21, 10:47 AM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region58 min
Jul 21, 11:15 AM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region112 min
Jul 21, 11:34 AM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region100 min
Jul 21, 11:36 AM EDTSpecial Weather StatementOKX39 min
Jul 21, 11:42 AM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region48 min
Jul 21, 11:45 AM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region2 hr
Jul 21, 12:01 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region2 hr
Jul 21, 12:23 PM EDTFlash Flood Warning Considerable damage threatOKXGreater Bridgeport Planning Region116 min
Jul 21, 12:40 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region50 min
Jul 21, 12:57 PM EDTFlash Flood Warning Considerable damage threatOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region2 hr
Jul 21, 1:01 PM EDTSpecial Weather StatementOKX44 min
Jul 21, 1:22 PM EDTAreal Flood AdvisoryOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region2 hr
Jul 21, 2:07 PM EDTSpecial Weather StatementOKX53 min
Jul 21, 2:34 PM EDTFlash Flood WarningOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region102 min
Jul 21, 4:12 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region48 min
Jul 21, 8:34 AM EDTSpecial Weather StatementOKXRockland41 min
Jul 21, 10:19 AM EDTAreal Flood AdvisoryOKXOrange, Putnam, Rockland, Westchester115 min
Jul 21, 10:31 AM EDTSpecial Weather StatementOKXPutnam59 min
Jul 21, 10:52 AM EDTAreal Flood AdvisoryOKXBronx, New York, Westchester2 hr
Jul 21, 11:07 AM EDTSpecial Weather StatementOKXPutnam53 min
Jul 21, 12:44 PM EDTSpecial Marine WarningOKX46 min
Jul 21, 1:52 PM EDTSpecial Marine WarningOKX53 min
Jul 21, 3:38 PM EDTFlash Flood WarningOKXBronx, New York, Westchester3 hr
Jul 21, 3:55 PM EDTSpecial Marine WarningOKX65 min
Jul 21, 4:00 PM EDTSpecial Weather StatementOKXBronx, New York45 min
Jul 21, 4:04 PM EDTFlash Flood WarningOKXKings, New York, Queens3 hr
Jul 21, 4:07 PM EDTSpecial Marine WarningOKX38 min
Jul 21, 4:21 PM EDTFlash Flood WarningOKXBronx, Nassau, Queens, Suffolk3 hr
Jul 21, 4:48 PM EDTSpecial Marine WarningOKX42 min
Jul 21, 5:02 PM EDTSpecial Weather StatementOKXSuffolk43 min
Jul 21, 5:05 PM EDTSpecial Marine WarningOKX55 min
Jul 21, 7:12 PM EDTAreal Flood WarningOKXBronx, Westchester8 hr

Nearby

Flash Flood Warnings in Connecticut, 2026Flash Flood Warnings in New York, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.