Alert archive / New York / Flash Flood Watches in 2021
Flash Flood Watch 1, NWS Buffalo, NY
NWS Buffalo, NY issued this flash flood watch at Jul 12, 2021, 9:02 AM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It took effect at Jul 12, 2021, 2:00 PM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 12, 2021, 9:02 AM EDT (13:02 UTC)
- In effect from
- Jul 12, 2021, 2:00 PM EDT
- Expired
- Jul 12, 2021, 9:12 PM EDT
- In force
- 7 hr
- Issued by
- NWS Buffalo, NY
- Flood severity
- None
Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY
The radar
The Buffalo radar (KBUF), 76 km from the middle of the area, began a volume at 13:05 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, 1.0 hours before the alert went out and 73 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
- 524 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
887 WGUS61 KBUF 121302 FFABUF URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Buffalo NY 902 AM EDT Mon Jul 12 2021 .A warm front will result in another round of showers and thunderstorms with heavy rain across the Southern Tier this afternoon into early this evening. Additional heavy rain combined with the recent heavy rainfall could produce flooding in some areas. NYZ019>021-122115- /O.NEW.KBUF.FF.A.0001.210712T1800Z-210713T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chautauqua-Cattaraugus-Allegany- Including the cities of Jamestown, Olean, and Wellsville 902 AM EDT Mon Jul 12 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... The National Weather Service in Buffalo has issued a * Flash Flood Watch for a portion of western New York, including the following counties, Allegany, Cattaraugus and Chautauqua. * From 2 PM EDT this afternoon through this evening. * Recent heavy rainfall of 1 to 2 inches since Sunday morning combined with heavy rain from additional showers and thunderstorms this afternoon into early this evening may result in flooding across the Southern Tier. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JLA
2 follow-up statements
659 WGUS61 KBUF 121942 FFABUF Flood Watch National Weather Service Buffalo NY 342 PM EDT Mon Jul 12 2021 NYZ019>021-130300- /O.CON.KBUF.FF.A.0001.000000T0000Z-210713T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chautauqua-Cattaraugus-Allegany- Including the cities of Jamestown, Olean, and Wellsville 342 PM EDT Mon Jul 12 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING... The Flash Flood Watch continues for * A portion of western New York, including the following counties, Allegany, Cattaraugus and Chautauqua. * Until 11 PM EDT this evening. * Recent heavy rainfall of 1 to 2 inches since Sunday morning combined with heavy rain from additional showers and thunderstorms into this evening may result in flash flooding across portions of the Southern Tier. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Apffel
143 WGUS61 KBUF 130112 FFABUF Flood Watch National Weather Service Buffalo NY 912 PM EDT Mon Jul 12 2021 NYZ019>021-130215- /O.CAN.KBUF.FF.A.0001.000000T0000Z-210713T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chautauqua-Cattaraugus-Allegany- Including the cities of Jamestown, Olean, and Wellsville 912 PM EDT Mon Jul 12 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of western New York, including the following areas, Allegany, Cattaraugus and Chautauqua has been cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Apffel
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:46 AM EDT | Special Weather Statement | BUF | Jefferson, Lewis, Oswego | 89 min |
| Jul 12, 6:26 PM EDT | Special Weather Statement | BUF | Chautauqua | 64 min |
Nearby
Flash Flood Watches in New York, 2021Every flash flood watch 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.