Alert archive / Connecticut / Flash Flood Warnings in 2020
Flash Flood Warning 21, NWS New York, NY
NWS New York, NY issued this flash flood warning at Jul 23, 2020, 9:53 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 116 min. 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 23, 2020, 9:53 PM EDT (01:53 UTC)
- Expired
- Jul 23, 2020, 11:49 PM EDT
- In force
- 116 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT
The radar
The Brookhaven radar (KOKX), 60 km from the middle of the area, began a volume at 01:56 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 00:00Z, 1.9 hours before the alert went out and 60 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
- 1702 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 797 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.0
The text
As transmitted.
677
WGUS51 KOKX 240153
FFWOKX
CTC001-009-240445-
/O.NEW.KOKX.FF.W.0021.200724T0153Z-200724T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
953 PM EDT Thu Jul 23 2020
The National Weather Service in Upton NY has issued a
* Flash Flood Warning for...
Central Fairfield County in southern Connecticut...
Southwestern New Haven County in southern Connecticut...
* Until 1245 AM EDT.
* At 952 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Radar has indicated between 1
and 2 inches of rain have fallen. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Bridgeport, New Haven, Danbury, Milford, Shelton, Southbury,
Newtown, Fairfield, Hamden, Stratford, Trumbull, Ridgefield,
Monroe, Bethel and Wilton.
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.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4142 7290 4122 7301 4121 7306 4123 7335
4125 7351 4130 7355 4140 7354 4144 7339
FLASH FLOOD...RADAR INDICATED
$$
JM1 follow-up statement
115
WGUS71 KOKX 240349
FFSOKX
Flash Flood Statement
National Weather Service New York NY
1149 PM EDT Thu Jul 23 2020
CTC001-009-240359-
/O.CAN.KOKX.FF.W.0021.000000T0000Z-200724T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-New Haven CT-
1149 PM EDT Thu Jul 23 2020
...THE FLASH FLOOD WARNING FOR CENTRAL FAIRFIELD AND SOUTHWESTERN NEW
HAVEN COUNTIES IS CANCELLED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 4142 7290 4122 7301 4121 7306 4123 7335
4125 7351 4130 7355 4140 7354 4144 7339
$$
JMThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 8:14 PM EDT | Special Weather Statement | OKX | 46 min | |
| Jul 23, 8:39 PM EDT | Special Weather Statement | OKX | 36 min | |
| Jul 23, 9:04 PM EDT | Severe Thunderstorm Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region | 28 min |
| Jul 23, 9:07 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 38 min |
| Jul 23, 9:19 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 3 hr |
| Jul 23, 9:37 PM EDT | Special Weather Statement | OKX | 53 min | |
| Jul 23, 9:43 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 62 min |
Nearby
Flash Flood Warnings in Connecticut, 2020Every flash flood warning in 2020
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.