Alert archive / New York / Flash Flood Warnings in 2020
Flash Flood Warning 11, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Jul 16, 2020, 6:42 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 3 hr. 6 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, 2020, 6:42 PM EDT (22:42 UTC)
- Expired
- Jul 16, 2020, 9:33 PM EDT
- In force
- 3 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), 77 km from the middle of the area, began a volume at 22:45 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, 7:17 PM EDT | FLASH FLOOD | 1 Sw Little Valley, NY | ROAD CLOSED AT RT 242 AND DUTCH HILL ROAD |
| Jul 16, 7:22 PM EDT | FLASH FLOOD | Ellington, NY | ROUTE 62 NORTH CLOSED DUE TO FLOODING BETWEEN BRAINARD RD AND SOUTH HILL RD. |
| Jul 16, 7:30 PM EDT | FLASH FLOOD | 1 Sw Little Valley, NY | RTE 242 WESTBOUND CLOSED FROM DUTCH HILL RD TO KYLER HILL RD. |
| Jul 16, 7:43 PM EDT | FLASH FLOOD | Ellington, NY | RT62 BRAINARD RD TO SOUTH HILL ROAD CLOSED BECAUSE OF FLOODING. |
| Jul 16, 8:30 PM EDT | FLASH FLOOD | Conewango Valley, NY | ROUTE 62 CLOSED NEAR FLAT IRON ROAD IN CONEWANGO DUE TO FLOODING. |
| Jul 16, 8:30 PM EDT | FLASH FLOOD | New Albion, NY | MOSHER HOLLOW ROAD CLOSED IN NEW ALBION DUE TO FLOODING. |
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, 10.7 hours before the alert went out and 75 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
- 12 J/kg
- Mixed-layer CIN
- -260 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
685
WGUS51 KBUF 162242
FFWBUF
NYC009-013-170145-
/O.NEW.KBUF.FF.W.0011.200716T2242Z-200717T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
642 PM EDT Thu Jul 16 2020
The National Weather Service in Buffalo has issued a
* Flash Flood Warning for...
West central Cattaraugus County in western New York...
East central Chautauqua County in western New York...
* Until 945 PM EDT.
* At 642 PM EDT, Doppler radar and automated gauges indicated
thunderstorms producing very heavy rain across the warned area. Up
to one inch of rain has already fallen. Flash flooding is ongoing
or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
New Albion, Conewango, Ellington, Leon, Randolph, Napoli, Little
Valley, Cattaraugus, Otto and East Randolph.
This includes Interstate 86 between exits 14 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4238 7881 4213 7880 4213 7920 4238 7920
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Reynolds2 follow-up statements
202
WGUS71 KBUF 170039
FFSBUF
Flash Flood Statement
National Weather Service Buffalo NY
839 PM EDT Thu Jul 16 2020
NYC013-170046-
/O.CAN.KBUF.FF.W.0011.000000T0000Z-200717T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
839 PM EDT Thu Jul 16 2020
...THE FLASH FLOOD WARNING FOR EAST CENTRAL CHAUTAUQUA COUNTY IS
CANCELLED...
Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.
LAT...LON 4238 7881 4213 7880 4213 7905 4238 7905
$$
NYC009-170145-
/O.CON.KBUF.FF.W.0011.000000T0000Z-200717T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-
839 PM EDT Thu Jul 16 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR
WEST CENTRAL CATTARAUGUS COUNTY...
At 836 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to three inches of rain have already
fallen. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
New Albion, Conewango, Leon, Randolph, Napoli, Little Valley,
Cattaraugus, Otto, East Randolph and South Dayton.
Additional rainfall amounts of half inch are possible in the warned
area.
This includes Interstate 86 between exits 15 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4238 7881 4213 7880 4213 7905 4238 7905
FLASH FLOOD...RADAR INDICATED
$$
HSK192 WGUS71 KBUF 170133 FFSBUF Flash Flood Statement National Weather Service Buffalo NY 933 PM EDT Thu Jul 16 2020 NYC009-170142- /O.CAN.KBUF.FF.W.0011.000000T0000Z-200717T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cattaraugus NY- 933 PM EDT Thu Jul 16 2020 ...THE FLASH FLOOD WARNING FOR WEST CENTRAL CATTARAUGUS COUNTY IS CANCELLED... The heavy rain has ended however flooding may be occurring. Please continue to heed any remaining road closures. LAT...LON 4238 7881 4213 7880 4213 7905 4238 7905 $$ HSK
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 4:11 AM EDT | Small Craft Advisory | BUF | 28 hr | |
| Jul 16, 11:28 AM EDT | Special Weather Statement | BUF | Genesee | 32 min |
| Jul 16, 11:57 AM EDT | Special Weather Statement | BUF | Genesee | 33 min |
| Jul 16, 12:09 PM EDT | Special Marine Warning | BUF | 66 min | |
| Jul 16, 12:33 PM EDT | Special Weather Statement | BUF | Monroe | 27 min |
| Jul 16, 12:37 PM EDT | Severe Thunderstorm Warning | BUF | Monroe | 38 min |
| Jul 16, 1:42 PM EDT | Special Marine Warning | BUF | 93 min | |
| Jul 16, 2:12 PM EDT | Special Marine Warning | BUF | 22 min | |
| Jul 16, 2:39 PM EDT | Special Weather Statement | BUF | Oswego | 36 min |
| Jul 16, 3:04 PM EDT | Special Marine Warning | BUF | 41 min | |
| Jul 16, 3:48 PM EDT | Special Marine Warning | BUF | 57 min | |
| Jul 16, 3:52 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie | 53 min |
| Jul 16, 3:53 PM EDT | Special Marine Warning | BUF | 67 min | |
| Jul 16, 4:07 PM EDT | Tornado Warning | BUF | Cattaraugus, Chautauqua, Erie | 38 min |
| Jul 16, 4:08 PM EDT | Special Marine Warning | BUF | 53 min | |
| Jul 16, 4:13 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 62 min |
| Jul 16, 4:23 PM EDT | Special Weather Statement | BUF | Monroe | 67 min |
| Jul 16, 4:44 PM EDT | Special Weather Statement | BUF | Erie | 46 min |
| Jul 16, 5:02 PM EDT | Special Weather Statement | BUF | Genesee | 43 min |
| Jul 16, 5:12 PM EDT | Special Weather Statement | BUF | Cattaraugus, Erie | 63 min |
| Jul 16, 5:14 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie | 46 min |
| Jul 16, 5:36 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 24 min |
| Jul 16, 5:49 PM EDT | Areal Flood Warning | BUF | Chautauqua, Erie, Genesee, Wyoming | 3 hr |
| Jul 16, 5:50 PM EDT | Special Weather Statement | BUF | Genesee, Livingston, Ontario, Wayne | 55 min |
| Jul 16, 5:50 PM EDT | Tornado Warning | BUF | Cattaraugus, Chautauqua | 40 min |
| Jul 16, 5:58 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Erie, Wyoming | 47 min |
| Jul 16, 6:32 PM EDT | Tornado Warning | BUF | Cattaraugus | 28 min |
| Jul 16, 6:50 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 40 min |
| Jul 16, 6:59 PM EDT | Tornado Warning | BUF | Cattaraugus | 31 min |
| Jul 16, 7:15 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus | 4 hr |
| Jul 16, 7:17 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 43 min |
| Jul 16, 7:42 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 48 min |
Nearby
Flash Flood Warnings in New York, 2020Every flash flood warning in 2020
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.