Alert archive / New York / Flash Flood Watches in 2021
Flash Flood Watch 7, NWS New York, NY
NWS New York, NY issued this flash flood watch at Aug 26, 2021, 3:35 PM EDT for 5 counties in New Jersey; 7 counties in New York. It took effect at Aug 27, 2021, 2:00 PM EDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Aug 26, 2021, 3:35 PM EDT (19:35 UTC)
- In effect from
- Aug 27, 2021, 2:00 PM EDT
- Expired
- Aug 28, 2021, 11:00 AM EDT
- In force
- 21 hr
- Issued by
- NWS New York, NY
- Flood severity
- None
Counties Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Union County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 100 km from the middle of the area, began a volume at 19:38 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, 7.6 hours before the alert went out and 100 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
- 844 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1230 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
125 WGUS61 KOKX 261935 FFAOKX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service New York NY 335 PM EDT Thu Aug 26 2021 NJZ002-004-006-103>108-270830- /O.NEW.KOKX.FF.A.0007.210827T1800Z-210829T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen- Western Essex-Eastern Essex-Western Union-Eastern Union- 335 PM EDT Thu Aug 26 2021 ...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT... The National Weather Service in Upton has issued a * Flash Flood Watch for a portion of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. * From Friday afternoon through late Saturday night. * A moist environment with slow moving convection may result in a quick 1 to 2 inches of rain from Friday afternoon through Saturday night. With recent heavy rainfall, it won't take much additional rain to result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MW
5 follow-up statements
647 WGUS61 KOKX 270952 FFAOKX Flood Watch National Weather Service New York NY 552 AM EDT Fri Aug 27 2021 NJZ002-004-006-103>108-272100- /O.CON.KOKX.FF.A.0007.210827T1800Z-210829T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen- Western Essex-Eastern Essex-Western Union-Eastern Union- 552 AM EDT Fri Aug 27 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE SATURDAY NIGHT... The Flash Flood Watch continues for * A portion of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. * From 2 PM EDT this afternoon through late Saturday night. * A moist environment with slow moving convection may result in a quick 1 to 2 inches of rain from Friday afternoon through Saturday night. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JP
592 WGUS61 KOKX 271551 FFAOKX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service New York NY 1151 AM EDT Fri Aug 27 2021 NYZ069-071>075-176-178-280500- /O.EXA.KOKX.FF.A.0007.210827T1800Z-210829T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rockland-Southern Westchester-New York (Manhattan)-Bronx- Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens- Southern Queens- 1151 AM EDT Fri Aug 27 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE SATURDAY NIGHT... The National Weather Service in Upton has expanded the * Flash Flood Watch to include a portion of southeast New York, including the following areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), Rockland, Southern Queens, and Southern Westchester. * Through late Saturday night * A moist environment could result in heavy rain producing thunderstorms this afternoon into Saturday night. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. The greatest risk looks to be this afternoon through Saturday afternoon. * Rainfall rates of 1 to 2 inches per hour could result in flash flooding, especially in low-lying and poor drainage areas such as highway underpasses. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ002-004-006-103>108-280500- /O.CON.KOKX.FF.A.0007.210827T1800Z-210829T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen- Eastern Bergen-Western Essex-Eastern Essex-Western Union- Eastern Union- 1151 AM EDT Fri Aug 27 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SATURDAY NIGHT... The Flash Flood Watch continues for * In northeast New Jersey: all areas of Bergen, Essex, Hudson, Passaic and Union Counties. * Through late Saturday night * A moist environment could result in heavy rain producing thunderstorms this afternoon into Saturday night. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. * Rainfall rates of 1 to 2 inches per hour could result in flash flooding, especially in low-lying and poor drainage areas such as highway underpasses as well as near creeks and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ STACHELSKI
828 WGUS61 KOKX 271928 FFAOKX Flood Watch National Weather Service New York NY 328 PM EDT Fri Aug 27 2021 NJZ002-004-006-103>108-NYZ069-071>075-176-178-280830- /O.CON.KOKX.FF.A.0007.000000T0000Z-210829T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen- Eastern Bergen-Western Essex-Eastern Essex-Western Union- Eastern Union-Rockland-Southern Westchester-New York (Manhattan)- Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens- Southern Queens- 328 PM EDT Fri Aug 27 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SATURDAY NIGHT... The Flash Flood Watch continues for * Portions of northeast New Jersey and southeast New York, including the following areas, 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 Queens, Richmond (Staten Island), Rockland, Southern Queens, and Southern Westchester. * Through late Saturday night * A moist environment could result in heavy rain producing thunderstorms this afternoon into Saturday night. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. The greatest risk looks to be this afternoon through Saturday afternoon. * Rainfall rates of 1 to 2 inches per hour could result in flash flooding, especially in low-lying and poor drainage areas such as highway underpasses. Areas along creeks and rivers are also vulnerable especially in northeast New Jersey and Rockland County, New York. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ STACHELSKI
081 WGUS61 KOKX 280811 FFAOKX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service New York NY 411 AM EDT Sat Aug 28 2021 NJZ002-004-006-103>108-281500- /O.EXT.KOKX.FF.A.0007.000000T0000Z-210828T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen- Western Essex-Eastern Essex-Western Union-Eastern Union- 411 AM EDT Sat Aug 28 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 11 AM EDT THIS MORNING... The Flash Flood Watch is now in effect for * A portion of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. * Until 11 AM EDT this morning. * A moist environment with slow moving convection may result in a quick 1 to 2 inches of rain through Saturday morning. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NYZ069-071>075-176-178-281500- /O.EXT.KOKX.FF.A.0007.000000T0000Z-210828T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rockland-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Southern Queens- 411 AM EDT Sat Aug 28 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 11 AM EDT THIS MORNING... The Flash Flood Watch is now in effect for * A portion of southeast New York, including the following areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), Rockland, Southern Queens and Southern Westchester. * Until 11 AM EDT this morning. * A moist environment with slow moving convection may result in a quick 1 to 2 inches of rain through Saturday morning. With recent heavy rainfall, it will not take much additional rain to result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JE
633 WGUS61 KOKX 281456 FFAOKX Flood Watch National Weather Service New York NY 1056 AM EDT Sat Aug 28 2021 NJZ002-004-006-103>108-NYZ069-071>075-176-178-281600- /O.EXP.KOKX.FF.A.0007.000000T0000Z-210828T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen- Western Essex-Eastern Essex-Western Union-Eastern Union-Rockland- Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-Southern Queens- 1056 AM EDT Sat Aug 28 2021 ...FLASH FLOOD WATCH WILL BE ALLOWED TO EXPIRE AT 11 AM EDT THIS MORNING... The Flash Flood Watch for portions of northeast New Jersey and southeast New York, including the following areas, in northeast New Jersey, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union. In southeast New York, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), Rockland, Southern Queens and Southern Westchester will be allowed to expire at 11 AM EDT this morning. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Fig
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 5:33 PM EDT | Special Weather Statement | OKX | Bergen | 42 min |
| Aug 26, 5:52 PM EDT | Areal Flood Advisory | OKX | Bergen | 53 min |
Nearby
Flash Flood Watches in New York, 2021Flash Flood Watches in New Jersey, 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.