Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 12, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Jul 16, 2021, 2:59 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 4 hr. 1 report 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, 2:59 PM EDT (18:59 UTC)
- Expired
- Jul 16, 2021, 7:18 PM EDT
- In force
- 4 hr
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cattaraugus County, NY, Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 110 km from the middle of the area, began a volume at 18:58 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, 3:18 PM EDT | HEAVY RAIN 1.25 | 1 Nne Jamestown, NY | FELL IN 20 MINUTES; FLOODING OCCURRING IN YARDS AND STREETS. |
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, 7.0 hours before the alert went out and 110 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.
146
WGUS51 KBUF 161859
FFWBUF
NYC009-013-162200-
/O.NEW.KBUF.FF.W.0012.210716T1859Z-210716T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
259 PM EDT Fri Jul 16 2021
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
Southwestern Cattaraugus County in western New York...
Southeastern Chautauqua County in western New York...
* Until 600 PM EDT.
* At 259 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 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...
Jamestown, Lakewood, Falconer, Jamestown West, Frewsburg, Busti,
Celoron, Panama, Ashville, Niobe 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 4209 7957 4217 7903 4200 7903 4200 7957
FLASH FLOOD...RADAR INDICATED
$$
AR2 follow-up statements
402
WGUS51 KBUF 162154
FFWBUF
NYC009-013-162330-
/O.EXT.KBUF.FF.W.0012.000000T0000Z-210716T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
554 PM EDT Fri Jul 16 2021
The National Weather Service in Buffalo has extended the
* Flash Flood Warning for...
Southwestern Cattaraugus County in western New York...
Southeastern Chautauqua County in western New York...
* Until 730 PM EDT.
* At 554 PM EDT, Doppler radar indicated another round of moderate
to heavy rain moving across the warned area. Between 1.5 and 3
inches of rain has already fallen across the area. Additional
rainfall amounts of 0.2 to 0.5 inches are possible. Flash flooding
is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Jamestown, Lakewood, Falconer, Jamestown West, Frewsburg, Busti,
Celoron, Panama, Ashville, Niobe and Kennedy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4209 7957 4217 7903 4200 7903 4200 7957
FLASH FLOOD...RADAR INDICATED
$$
AR296 WGUS71 KBUF 162318 FFSBUF Flash Flood Statement National Weather Service Buffalo NY 718 PM EDT Fri Jul 16 2021 NYC009-013-162328- /O.CAN.KBUF.FF.W.0012.000000T0000Z-210716T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cattaraugus NY-Chautauqua NY- 718 PM EDT Fri Jul 16 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES... The Flash Flood Warning has been replaced by a new Areal Flood Warning for southeastern Chautauqua County only. Please continue to heed any road closures. LAT...LON 4209 7957 4217 7903 4200 7903 4200 7957 $$ JJR
The 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, 2:13 PM EDT | Flash Flood Warning | BUF | Chautauqua | 5 hr |
| Jul 16, 2:41 PM EDT | Flash Flood Watch | BUF | Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more | 32 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.