Alert archive / New York / Flash Flood Warnings in 2017
Flash Flood Warning 11, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood warning at Sep 14, 2017, 3:45 AM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 3 hr. 2 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
- Sep 14, 2017, 3:45 AM EDT (07:45 UTC)
- Expired
- Sep 14, 2017, 6:45 AM 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), 88 km from the middle of the area, began a volume at 07:46 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 |
|---|---|---|---|
| Sep 14, 4:30 AM EDT | FLASH FLOOD | 1 Ne Kennedy, NY | ESTIMATED 4 INCHES OF WATER FLOWING OVER ROUTE 62 AND ROUTE 394 INTERSECTION. |
| Sep 14, 5:00 AM EDT | FLASH FLOOD | 2 Ne Kennedy, NY | FLOODING ON ROUTE 394 FROM LEACH HILL RD TO WATERBORO HILL RD...DEBRIS ON ROAD. |
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 00:00Z, 7.8 hours before the alert went out and 87 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
- 295 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1089 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
324 WGUS51 KBUF 140745 FFWBUF NYC009-013-141045- /O.NEW.KBUF.FF.W.0011.170914T0745Z-170914T1045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Buffalo NY 345 AM EDT THU SEP 14 2017 The National Weather Service in Buffalo has issued a * Flash Flood Warning for... Western Cattaraugus County in western New York... Southeastern Chautauqua County in western New York... * Until 645 AM EDT. * At 345 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Jamestown, Lakewood, Falconer, Jamestown West, Frewsburg, New Albion, Gerry and Dayton. This includes Interstate 86 between exits 11 and 17. LAT...LON 4206 7935 4244 7925 4243 7878 4206 7888 $$ Apffel
3 follow-up statements
824 WGUS71 KBUF 140849 FFSBUF Flash Flood Statement National Weather Service Buffalo NY 449 AM EDT THU SEP 14 2017 NYC009-013-141045- /O.CON.KBUF.FF.W.0011.000000T0000Z-170914T1045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cattaraugus NY-Chautauqua NY- 449 AM EDT THU SEP 14 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM EDT FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES... At 438 AM EDT, Doppler radar indicated heavy rain across the warned area. Up to two inches of rain have already fallen. Flash flooding is already occurring. The heaviest rain has fallen in the Conewango Valley from Waterboro to Conewango to Cherry Creek. This will first cause flash flooding in the headwaters of Conewango Creek and some of its feeder streams, with Conewango Creek expected to continue to rise over the next couple hours. There was also heavy rain in Jamestown as well as the rest of the warned area. Some locations that will experience flooding include... Jamestown, Falconer, Jamestown West, Frewsburg, New Albion, Gerry, Conewango and Ellington. This includes Interstate 86 between exits 11 and 17. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4206 7935 4237 7919 4238 7879 4206 7888 $$ Apffel
163 WGUS71 KBUF 140947 FFSBUF Flash Flood Statement National Weather Service Buffalo NY 547 AM EDT THU SEP 14 2017 NYC009-013-141045- /O.CON.KBUF.FF.W.0011.000000T0000Z-170914T1045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cattaraugus NY-Chautauqua NY- 547 AM EDT THU SEP 14 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM EDT FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES... At 539 AM EDT, Doppler radar and rain gauges indicate that between an inch and a half and three inches of rain has has fallen across the warned area. The heaviest rain has fallen in the Conewango Valley from Waterboro to Conewango to Cherry Creek. There is flash flooding along portions of Conewango Creek and some of its feeder streams. Although the heaviest rain has moved out of the area, some creeks may continue to rise in response to the recent heavy rain with additional flash flooding still possible in the warned area. Some locations that will experience flooding include... Jamestown, Falconer, Jamestown West, Frewsburg, New Albion, Gerry, Conewango and Ellington. This includes Interstate 86 between exits 11 and 17. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 4206 7935 4237 7919 4238 7879 4206 7888 $$ Apffel
285 WGUS71 KBUF 141039 FFSBUF Flash Flood Statement National Weather Service Buffalo NY 639 AM EDT THU SEP 14 2017 NYC009-013-141047- /O.EXP.KBUF.FF.W.0011.000000T0000Z-170914T1045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cattaraugus NY-Chautauqua NY- 639 AM EDT THU SEP 14 2017 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES WILL EXPIRE AT 645 AM EDT... Flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4206 7935 4237 7919 4238 7879 4206 7888 $$ Apffel
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 3:35 AM EDT | Special Weather Statement | BUF | Chautauqua | 40 min |
| Sep 14, 5:42 AM EDT | Special Weather Statement | BUF | Allegany, Cattaraugus | 78 min |
Nearby
Flash Flood Warnings in New York, 2017Every flash flood warning in 2017
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.