Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 21, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 25, 2021, 7:36 PM EDT for Allegany County, Livingston County, Wyoming County, New York. It was in force for 2 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
- Aug 25, 2021, 7:36 PM EDT (23:36 UTC)
- Expired
- Aug 25, 2021, 9:46 PM EDT
- In force
- 2 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegany County, NY, Livingston County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 68 km from the middle of the area, began a volume at 23:36 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, 11.6 hours before the alert went out and 64 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
- 446 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1134 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
267
WGUS51 KBUF 252336
FFWBUF
NYC003-051-121-260345-
/O.NEW.KBUF.FF.W.0021.210825T2336Z-210826T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
736 PM EDT Wed Aug 25 2021
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
Northern Allegany County in western New York...
Western Livingston County in western New York...
Southeastern Wyoming County in western New York...
* Until 1145 PM EDT.
* At 736 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 inches of
rain have fallen. Additional rainfall amounts up to 0.5 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...
Letchworth State Park, Portageville, Pike, Castile, Silver
Springs, Gainesville, Hunt and Rossburg.
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 4252 7816 4257 7815 4263 7814 4268 7810
4269 7803 4268 7794 4264 7794 4257 7797
4248 7805 4249 7814
FLASH FLOOD...RADAR INDICATED
$$
HSK2 follow-up statements
627
WGUS71 KBUF 260054
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
854 PM EDT Wed Aug 25 2021
NYC003-051-121-260345-
/O.CON.KBUF.FF.W.0021.000000T0000Z-210826T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegany NY-Livingston NY-Wyoming NY-
854 PM EDT Wed Aug 25 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT THIS
EVENING FOR NORTHERN ALLEGANY, WESTERN LIVINGSTON AND SOUTHEASTERN
WYOMING COUNTIES...
At 854 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Letchworth State Park, Portageville, Pike, Castile, Silver
Springs, Gainesville, Hunt and Rossburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4252 7816 4257 7815 4263 7814 4268 7810
4269 7803 4268 7794 4264 7794 4257 7797
4248 7805 4249 7814
FLASH FLOOD...RADAR INDICATED
$$
HSK144
WGUS71 KBUF 260146
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
946 PM EDT Wed Aug 25 2021
NYC003-051-121-260156-
/O.CAN.KBUF.FF.W.0021.000000T0000Z-210826T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegany NY-Livingston NY-Wyoming NY-
946 PM EDT Wed Aug 25 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN ALLEGANY, WESTERN
LIVINGSTON AND SOUTHEASTERN WYOMING 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 4252 7816 4257 7815 4263 7814 4268 7810
4269 7803 4268 7794 4264 7794 4257 7797
4248 7805 4249 7814
$$
HSKThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 5:00 PM EDT | Special Marine Warning | BUF | 60 min | |
| Aug 25, 6:56 PM EDT | Special Weather Statement | BUF | Livingston | 64 min |
| Aug 25, 7:15 PM EDT | Special Weather Statement | BUF | Wayne | 45 min |
| Aug 25, 7:50 PM EDT | Special Weather Statement | BUF | Livingston | 40 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.