Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 11, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Jul 16, 2021, 2:13 PM EDT for Chautauqua County, New York. It was in force for 5 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 16, 2021, 2:13 PM EDT (18:13 UTC)
- Expired
- Jul 16, 2021, 7:15 PM EDT
- In force
- 5 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 94 km from the middle of the area, began a volume at 18:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 16, 2:45 PM EDT | HEAVY RAIN 2.4 | 1 N Gerry, NY | TOTAL RAINFALL OVER A 2 HOUR PERIOD THROUGH 2:45 PM. |
| Jul 16, 4:30 PM EDT | FLASH FLOOD | 2 E Ellington, NY | WATERBORO HILL ROAD CLOSED WITH EXCESSIVE WATER FLOWING OVER THE ROAD. |
| Jul 16, 5:30 PM EDT | FLASH FLOOD | 1 Sse Bemus Point, NY | FLASH FLOODING FROM BEMUS CREEK AND WATER BACKING UP ACROSS BEMUS POINT FROM CHAUTAUQUA LAKE. VOLUNTARY EVACUATIONS OF AREA HOMES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.2 hours before the alert went out and 94 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
381
WGUS51 KBUF 161813
FFWBUF
NYC013-162115-
/O.NEW.KBUF.FF.W.0011.210716T1813Z-210716T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
213 PM EDT Fri Jul 16 2021
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
Southern Chautauqua County in western New York...
* Until 515 PM EDT.
* At 213 PM EDT, Doppler radar indicated showers and thunderstorms
producing heavy rain across the warned area. Between 1 and 2
inches of rain has already fallen. Additional rainfall amounts of
1 to 1.5 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...
Mayville, Long Point State Park, Chautauqua Institution,
Chautauqua, Gerry, Ellington, Sherman, Sinclairville, Cherry
Creek, Bemus Point, Ellery Center, Stow, Dewittville, Stedman
Corners and Kennedy.
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 4221 7963 4229 7944 4230 7906 4225 7906
4224 7906 4221 7906 4217 7906 4216 7906
4209 7953 4210 7954
FLASH FLOOD...RADAR INDICATED
$$
AR3 follow-up statements
124
WGUS71 KBUF 162017
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
417 PM EDT Fri Jul 16 2021
NYC013-162115-
/O.CON.KBUF.FF.W.0011.000000T0000Z-210716T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
417 PM EDT Fri Jul 16 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM EDT THIS
AFTERNOON FOR SOUTHERN CHAUTAUQUA COUNTY...
At 417 PM EDT, The heavy rainfall has moved out of the warned area.
Reports of 2 and 3 inches of rain has fallen, with isolated areas up
to 4 inches. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Mayville, Long Point State Park, Chautauqua Institution,
Chautauqua, Gerry, Ellington, Sherman, Sinclairville, Cherry
Creek, Bemus Point, Ellery Center, Stow, Dewittville, Stedman
Corners and Kennedy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4221 7963 4229 7944 4230 7906 4225 7906
4224 7906 4221 7906 4217 7906 4216 7906
4209 7953 4210 7954
FLASH FLOOD...RADAR INDICATED
$$
AR792
WGUS51 KBUF 162112
FFWBUF
NYC013-162315-
/O.EXT.KBUF.FF.W.0011.000000T0000Z-210716T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
512 PM EDT Fri Jul 16 2021
The National Weather Service in Buffalo has extended the
* Flash Flood Warning for...
Southern Chautauqua County in western New York...
* Until 715 PM EDT.
* At 512 PM EDT, Doppler radar indicated moderate to heavy showers
moving through the warned area. Additional rainfall of up to half
an inch can be anticipated. Between 2 and 3 inches of rain has
already fallen over 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...
Mayville, Long Point State Park, Chautauqua Institution,
Chautauqua, Gerry, Ellington, Sherman, Sinclairville, Cherry
Creek, Bemus Point, Ellery Center, Stow, Dewittville, Stedman
Corners and Kennedy.
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 4221 7963 4229 7944 4230 7906 4225 7906
4224 7906 4221 7906 4217 7906 4216 7906
4209 7953 4210 7954
FLASH FLOOD...RADAR INDICATED
$$
AR153
WGUS71 KBUF 162317
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
717 PM EDT Fri Jul 16 2021
NYC013-162327-
/O.EXP.KBUF.FF.W.0011.000000T0000Z-210716T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
717 PM EDT Fri Jul 16 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN CHAUTAUQUA COUNTY...
The Flash Flood Warning has been replaced by a new Areal Flood
Warning. Please continue to heed any road closures.
LAT...LON 4221 7963 4229 7944 4230 7906 4225 7906
4224 7906 4221 7906 4217 7906 4216 7906
4209 7953 4210 7954
$$
JJRThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:06 PM EDT | Special Weather Statement | BUF | Erie | 24 min |
| Jul 15, 8:12 PM EDT | Special Weather Statement | BUF | Chautauqua | 63 min |
| Jul 15, 8:18 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 57 min |
| Jul 15, 9:21 PM EDT | Special Weather Statement | BUF | Cattaraugus | 54 min |
| Jul 15, 10:48 PM EDT | Special Marine Warning | BUF | 57 min | |
| Jul 15, 11:09 PM EDT | Special Weather Statement | BUF | Jefferson | 36 min |
| Jul 16, 2:41 PM EDT | Flash Flood Watch | BUF | Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more | 32 hr |
| Jul 16, 2:59 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 4 hr |
| Jul 16, 4:45 PM EDT | Small Craft Advisory | BUF | 44 hr | |
| Jul 16, 4:49 PM EDT | Areal Flood Warning | BUF | Chautauqua | 6 hr |
| Jul 16, 7:14 PM EDT | Areal Flood Warning | BUF | Chautauqua | 6 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.