Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 19, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 17, 2021, 4:17 PM EDT for Cayuga County, Ontario County, Wayne County, New York. It was in force for 86 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
- Aug 17, 2021, 4:17 PM EDT (20:17 UTC)
- Expired
- Aug 17, 2021, 5:43 PM EDT
- In force
- 86 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cayuga County, NY, Ontario County, NY, Wayne County, NY
The radar
The Binghamton radar (KBGM), 122 km from the middle of the area, began a volume at 20:20 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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.3 hours before the alert went out and 144 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
- 418 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 603 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
608
WGUS51 KBUF 172017
FFWBUF
NYC011-069-117-180015-
/O.NEW.KBUF.FF.W.0019.210817T2017Z-210818T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
417 PM EDT Tue Aug 17 2021
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
Cayuga County in central New York...
Northeastern Ontario County in western New York...
Southern Wayne County in western New York...
* Until 815 PM EDT.
* At 417 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Canandaigua, Newark, Lyons, Palmyra, Clifton Springs, Clyde,
Phelps, Rose, Conquest, Savannah, Manchester, Wolcott,
Shortsville, Port Byron, Red Creek, Fairville, North Rose, Port
Gibson, South Butler and Willow Creek Estates.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4309 7725 4328 7665 4305 7659 4303 7671
4302 7671 4301 7696 4296 7696 4283 7735
FLASH FLOOD...RADAR INDICATED
$$
HSK2 follow-up statements
860
WGUS71 KBUF 172105
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
505 PM EDT Tue Aug 17 2021
NYC011-069-117-180015-
/O.CON.KBUF.FF.W.0019.000000T0000Z-210818T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cayuga NY-Ontario NY-Wayne NY-
505 PM EDT Tue Aug 17 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS
EVENING FOR CAYUGA, NORTHEASTERN ONTARIO AND SOUTHERN WAYNE
COUNTIES...
At 505 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. Heavy rain has subsided however up to 0.5 inch of additional
rainfall is expected in the warned area. Flash flooding is ongoing
or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Canandaigua, Newark, Lyons, Palmyra, Clifton Springs, Clyde,
Phelps, Rose, Conquest, Savannah, Manchester, Wolcott,
Shortsville, Port Byron, Red Creek, Fairville, North Rose, Port
Gibson, South Butler and Willow Creek Estates.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4309 7725 4328 7665 4305 7659 4303 7671
4302 7671 4301 7696 4296 7696 4283 7735
FLASH FLOOD...RADAR INDICATED
$$
HSK638
WGUS71 KBUF 172143
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
543 PM EDT Tue Aug 17 2021
NYC011-069-117-172153-
/O.CAN.KBUF.FF.W.0019.000000T0000Z-210818T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cayuga NY-Ontario NY-Wayne NY-
543 PM EDT Tue Aug 17 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CAYUGA, NORTHEASTERN ONTARIO
AND SOUTHERN WAYNE COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4309 7725 4328 7665 4305 7659 4303 7671
4302 7671 4301 7696 4296 7696 4283 7735
$$
HSKThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:01 AM EDT | Special Weather Statement | BUF | Jefferson | 74 min |
| Aug 17, 2:59 PM EDT | Flash Flood Watch | BUF | Allegany, Cattaraugus, Cayuga, Lewis, Livingston, Ontario and 2 more | 41 hr |
| Aug 17, 3:08 PM EDT | Special Weather Statement | BUF | Monroe | 37 min |
| Aug 17, 3:54 PM EDT | Special Weather Statement | BUF | Wayne | 66 min |
| Aug 17, 4:48 PM EDT | Special Weather Statement | BUF | Cayuga | 42 min |
Nearby
Flash Flood Warnings in New York, 2021Every flash flood warning 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.