Alert archive / New York / Areal Flood Warnings in 2021
Areal Flood Warning 12, NWS Buffalo, NY
NWS Buffalo, NY issued this areal flood warning at Jul 20, 2021, 8:07 PM EDT for 4 counties in New York. It was in force for 81 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2021, 8:07 PM EDT (00:07 UTC)
- Expired
- Jul 20, 2021, 9:28 PM EDT
- In force
- 81 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Livingston County, NY, Monroe County, NY, Ontario County, NY, Wayne County, NY
The radar
The Buffalo radar (KBUF), 101 km from the middle of the area, began a volume at 00:07 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 00:00Z, 0.1 hours before the alert went out and 98 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
- 1459 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -176 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
548
WGUS41 KBUF 210007
FLWBUF
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Buffalo NY
807 PM EDT Tue Jul 20 2021
NYC051-055-069-117-210315-
/O.NEW.KBUF.FA.W.0012.210721T0007Z-210721T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Livingston NY-Monroe NY-Ontario NY-Wayne NY-
807 PM EDT Tue Jul 20 2021
The National Weather Service in Buffalo has issued a
* Flood Warning for...
Northeastern Livingston County in western New York...
Southern Monroe County in western New York...
Ontario County in western New York...
Southwestern Wayne County in western New York...
* Until 1115 PM EDT.
* At 807 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. Flooding is ongoing or expected to begin shortly in
the warned area. Between 1 and 2 inches of rain have fallen.
* Some locations that will experience flooding include...
Canandaigua, Geneseo, Avon, Mount Morris, Victor, Honeoye Falls,
Conesus, Bristol, Caledonia, Lima, Clifton Springs, Scottsville,
Bloomfield, Honeoye, Hemlock, Farmington, Mendon, Gorham, East
Bloomfield and Rush.
Additional rainfall amounts up to 1 inch are possible in the warned
area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4304 7787 4304 7714 4276 7710 4276 7731
4272 7735 4269 7788
$$
SJW1 follow-up statement
643
WGUS81 KBUF 210128
FLSBUF
Flood Statement
National Weather Service Buffalo NY
928 PM EDT Tue Jul 20 2021
NYC051-055-069-117-210138-
/O.CAN.KBUF.FA.W.0012.000000T0000Z-210721T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Livingston NY-Monroe NY-Ontario NY-Wayne NY-
928 PM EDT Tue Jul 20 2021
...FLOOD WARNING IS CANCELLED FOR NORTHEASTERN LIVINGSTON, SOUTHERN
MONROE, ONTARIO AND SOUTHWESTERN WAYNE COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any road closures.
LAT...LON 4304 7787 4304 7714 4276 7710 4276 7731
4272 7735 4269 7788
$$
SJWThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:28 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 62 min |
| Jul 20, 8:39 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Erie, Livingston, Wyoming | 53 min |
| Jul 20, 9:16 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 36 min |
| Jul 20, 9:45 PM EDT | Special Marine Warning | BUF | 60 min | |
| Jul 20, 10:14 PM EDT | Areal Flood Warning | BUF | Niagara | 9 hr |
| Jul 20, 10:19 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 56 min |
| Jul 20, 11:10 PM EDT | Special Weather Statement | BUF | Cattaraugus | 35 min |
| Jul 20, 11:29 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Chautauqua | 61 min |
| Jul 21, 12:31 AM EDT | Special Weather Statement | BUF | Allegany | 44 min |
Nearby
Areal Flood Warnings in New York, 2021Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.