Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 22, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Aug 29, 2021, 12:47 PM EDT for Niagara County, New York. It was in force for 3 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 29, 2021, 12:47 PM EDT (16:47 UTC)
- Expired
- Aug 29, 2021, 3:46 PM EDT
- In force
- 3 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Niagara County, NY
The radar
The Buffalo radar (KBUF), 35 km from the middle of the area, began a volume at 16:52 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, 4.8 hours before the alert went out and 38 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
- 580 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
305
WGUS51 KBUF 291647
FFWBUF
NYC063-292045-
/O.NEW.KBUF.FF.W.0022.210829T1647Z-210829T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
1247 PM EDT Sun Aug 29 2021
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
Northwestern Niagara County in western New York...
* Until 445 PM EDT.
* At 1247 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...
Lockport, Newfane, Lewiston, Youngstown, Fort Niagara State Park,
Wilson, Ransomville, Cambria Center, Model City and Olcott.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4310 7906 4311 7906 4312 7907 4313 7906
4314 7904 4317 7905 4320 7905 4321 7906
4322 7905 4325 7906 4326 7907 4328 7908
4336 7868 4320 7861
FLASH FLOOD...RADAR INDICATED
$$
Apffel2 follow-up statements
421
WGUS71 KBUF 291843
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
243 PM EDT Sun Aug 29 2021
NYC063-292045-
/O.CON.KBUF.FF.W.0022.000000T0000Z-210829T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Niagara NY-
243 PM EDT Sun Aug 29 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM EDT THIS
AFTERNOON FOR NORTHWESTERN NIAGARA COUNTY...
At 243 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3 inches of rain have
fallen. Additional rainfall amounts up to 1 inch are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Lewiston, Youngstown, Sanborn, Fort Niagara State Park, Wilson,
Ransomville, Model City and Cambria Center.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4311 7906 4312 7907 4314 7904 4317 7905
4320 7905 4321 7906 4322 7905 4325 7906
4326 7907 4328 7908 4333 7882 4327 7881
4324 7879 4316 7878 4310 7906
FLASH FLOOD...RADAR INDICATED
$$
Apffel142
WGUS71 KBUF 291946
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
346 PM EDT Sun Aug 29 2021
NYC063-291956-
/O.CAN.KBUF.FF.W.0022.000000T0000Z-210829T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Niagara NY-
346 PM EDT Sun Aug 29 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN NIAGARA
COUNTY...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4311 7906 4312 7907 4314 7904 4317 7905
4320 7905 4321 7906 4322 7905 4325 7906
4326 7907 4328 7908 4333 7882 4327 7881
4324 7879 4316 7878 4310 7906
$$
ApffelThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 9:06 PM EDT | Special Weather Statement | BUF | Livingston | 54 min |
| Aug 29, 12:04 AM EDT | Special Weather Statement | BUF | Jefferson | 56 min |
| Aug 29, 1:02 AM EDT | Special Weather Statement | BUF | Jefferson, Lewis | 58 min |
| Aug 29, 2:04 AM EDT | Special Weather Statement | BUF | Jefferson | 3 hr |
| Aug 29, 12:03 PM EDT | Special Marine Warning | BUF | 57 min | |
| Aug 29, 12:07 PM EDT | Special Weather Statement | BUF | Niagara | 53 min |
| Aug 29, 12:24 PM EDT | Special Weather Statement | BUF | Chautauqua | 66 min |
| Aug 29, 1:55 PM EDT | Special Weather Statement | BUF | Seneca | 35 min |
| Aug 29, 2:04 PM EDT | Special Weather Statement | BUF | Ontario | 41 min |
| Aug 29, 2:11 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Monroe, Ontario, Wayne | 64 min |
| Aug 29, 2:30 PM EDT | Special Weather Statement | BUF | Ontario, Wayne | 60 min |
| Aug 29, 3:25 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 20 min |
| Aug 29, 3:38 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 10 min |
| Aug 29, 3:57 PM EDT | Special Marine Warning | BUF | 62 min | |
| Aug 29, 5:29 PM EDT | Special Weather Statement | BUF | Ontario | 31 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.