Alert archive / New York / Flash Flood Watches in 2021
Flash Flood Watch 5, NWS New York, NY
NWS New York, NY issued this flash flood watch at Jul 16, 2021, 2:43 PM EDT for 5 counties in New Jersey; 10 counties in New York; Greater Bridgeport Planning Region, Connecticut. It took effect at Jul 17, 2021, 2:00 PM EDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Jul 16, 2021, 2:43 PM EDT (18:43 UTC)
- In effect from
- Jul 17, 2021, 2:00 PM EDT
- Expired
- Jul 18, 2021, 3:18 AM EDT
- In force
- 13 hr
- Issued by
- NWS New York, NY
- Flood severity
- None
Counties Greater Bridgeport Planning Region, CT, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Union County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 93 km from the middle of the area, began a volume at 18:43 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, 6.7 hours before the alert went out and 93 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
- 1044 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 994 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
945 WGUS61 KOKX 161843 FFAOKX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service New York NY 243 PM EDT Fri Jul 16 2021 CTZ005-009-NJZ002-004-006-103>108-NYZ067>075-176>179-171000- /O.NEW.KOKX.FF.A.0005.210717T1800Z-210718T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Fairfield-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Northern Nassau- Southern Queens-Southern Nassau- 243 PM EDT Fri Jul 16 2021 ...FLASH FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SATURDAY NIGHT... The National Weather Service in Upton has issued a * Flash Flood Watch for portions of southern Connecticut, northeast New Jersey and southeast New York, including the following areas, in southern Connecticut, Northern Fairfield and Southern Fairfield. In northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northern Westchester, Orange, Putnam, Richmond (Staten Island), Rockland, Southern Nassau, Southern Queens and Southern Westchester. * From Saturday afternoon through late Saturday night. * Showers and thunderstorms are expected to impact the area ahead of a slow moving cold front. The rain will fall across areas with abnormally wet antecedent conditions due to recent heavy rain, leading to an increased potential for flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MD
4 follow-up statements
051 WGUS61 KOKX 170729 FFAOKX Flood Watch National Weather Service New York NY 329 AM EDT Sat Jul 17 2021 CTZ005-009-NJZ002-004-006-103>108-NYZ067>075-176>179-172030- /O.CON.KOKX.FF.A.0005.210717T1800Z-210718T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Fairfield-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Northern Nassau- Southern Queens-Southern Nassau- 329 AM EDT Sat Jul 17 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of southern Connecticut, northeast New Jersey and southeast New York, including the following areas, in southern Connecticut, Northern Fairfield and Southern Fairfield. In northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northern Westchester, Orange, Putnam, Richmond (Staten Island), Rockland, Southern Nassau, Southern Queens and Southern Westchester. * From 2 PM EDT this afternoon through late tonight. * Showers and thunderstorms are expected to impact the area ahead of a slow moving cold front. The rain will fall across areas with abnormally wet antecedent conditions due to recent heavy rain, leading to an increased potential for flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
695 WGUS61 KOKX 172004 FFAOKX Flood Watch National Weather Service New York NY 404 PM EDT Sat Jul 17 2021 CTZ005-009-NJZ002-004-006-103>108-NYZ067>075-176>179-180415- /O.CON.KOKX.FF.A.0005.000000T0000Z-210718T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Fairfield-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Northern Nassau- Southern Queens-Southern Nassau- 404 PM EDT Sat Jul 17 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of southern Connecticut, northeast New Jersey and southeast New York, including the following areas, in southern Connecticut, Northern Fairfield and Southern Fairfield. In northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northern Westchester, Orange, Putnam, Richmond (Staten Island), Rockland, Southern Nassau, Southern Queens and Southern Westchester. * Through late tonight. * Showers and thunderstorms are expected to impact the area ahead of a slow moving cold front. The rain will fall across areas with abnormally wet antecedent conditions due to recent heavy rain, leading to an increased potential for flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JM
386 WGUS61 KOKX 180331 FFAOKX Flood Watch National Weather Service New York NY 1131 PM EDT Sat Jul 17 2021 CTZ005-009-NJZ002-004-006-103>108-NYZ067>075-176>179-181000- /O.CON.KOKX.FF.A.0005.000000T0000Z-210718T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Fairfield-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Northern Nassau- Southern Queens-Southern Nassau- 1131 PM EDT Sat Jul 17 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM EDT SUNDAY... The Flash Flood Watch continues for * Portions of southern Connecticut, northeast New Jersey and southeast New York, including the following areas, in southern Connecticut, Northern Fairfield and Southern Fairfield. In northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northern Westchester, Orange, Putnam, Richmond (Staten Island), Rockland, Southern Nassau, Southern Queens and Southern Westchester. * Until 6 AM EDT Sunday. * Showers and thunderstorms are expected to impact the area ahead of a slow moving cold front. The rain will fall across areas with abnormally wet antecedent conditions due to recent heavy rain, leading to an increased potential for flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
295 WGUS61 KOKX 180718 FFAOKX Flood Watch National Weather Service New York NY 318 AM EDT Sun Jul 18 2021 CTZ005-009-NJZ002-004-006-103>108-NYZ067>075-176>179-180830- /O.CAN.KOKX.FF.A.0005.000000T0000Z-210718T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Fairfield-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Northern Nassau- Southern Queens-Southern Nassau- 318 AM EDT Sun Jul 18 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southern Connecticut, northeast New Jersey and southeast New York, including the following areas, in southern Connecticut, Northern Fairfield and Southern Fairfield. In northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northern Westchester, Orange, Putnam, Richmond (Staten Island), Rockland, Southern Nassau, Southern Queens and Southern Westchester has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. $$
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 3:08 PM EDT | Areal Flood Advisory | OKX | Orange | 112 min |
| Jul 16, 3:48 PM EDT | Special Weather Statement | OKX | Orange | 42 min |
| Jul 16, 4:24 PM EDT | Special Weather Statement | OKX | Orange | 51 min |
| Jul 16, 4:34 PM EDT | Areal Flood Advisory | OKX | Orange | 116 min |
| Jul 16, 5:26 PM EDT | Severe Thunderstorm Warning | OKX | Southeastern Connecticut Planning Region | 49 min |
| Jul 16, 5:32 PM EDT | Special Weather Statement | OKX | 43 min | |
| Jul 16, 6:04 PM EDT | Special Weather Statement | OKX | 41 min |
Nearby
Flash Flood Watches in New York, 2021Flash Flood Watches in New Jersey, 2021Flash Flood Watches in Connecticut, 2021Every flash flood watch in 2021
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.