Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 11, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jun 9, 2021, 3:18 PM EDT for Cattaraugus County, New York. It was in force for 57 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
- Jun 9, 2021, 3:18 PM EDT (19:18 UTC)
- Expired
- Jun 9, 2021, 4:15 PM EDT
- In force
- 57 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Cattaraugus County, NY
The radar
The Buffalo radar (KBUF), 93 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 91 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
- 68 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 905 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
831
WUUS51 KBUF 091918
SVRBUF
NYC009-092015-
/O.NEW.KBUF.SV.W.0011.210609T1918Z-210609T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
318 PM EDT Wed Jun 9 2021
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Southwestern Cattaraugus County in western New York...
* Until 415 PM EDT..
* At 317 PM EDT, a severe thunderstorm was located over Salamanca,
moving southwest at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Salamanca, Allegany State Park, Great Valley, Carrollton, Randolph,
Napoli, Little Valley, Humphrey, East Randolph and Ellicottville.
This includes Interstate 86 between exits 15 and 21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4200 7906 4217 7906 4232 7865 4220 7848
4200 7880
TIME...MOT...LOC 1917Z 058DEG 10KT 4219 7871
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Mitchell2 follow-up statements
314
WWUS51 KBUF 091951
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
351 PM EDT Wed Jun 9 2021
NYC009-092015-
/O.CON.KBUF.SV.W.0011.000000T0000Z-210609T2015Z/
Cattaraugus NY-
351 PM EDT Wed Jun 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN CATTARAUGUS COUNTY...
At 348 PM EDT, a severe thunderstorm was located near Ashford, or 9
miles northeast of Salamanca, moving southwest at 5 mph. Additional
severe thunderstorms were near Salamanca, moving southwest at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Salamanca, Allegany State Park, Great Valley, Carrollton, Randolph,
Napoli, Little Valley, Humphrey, East Randolph and Ellicottville.
This includes Interstate 86 between exits 15 and 21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall are occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4200 7906 4217 7906 4232 7865 4220 7848
4200 7880
TIME...MOT...LOC 1948Z 055DEG 5KT 4226 7858
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
JLA713
WWUS51 KBUF 092017
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
417 PM EDT Wed Jun 9 2021
NYC009-092025-
/O.EXP.KBUF.SV.W.0011.000000T0000Z-210609T2015Z/
Cattaraugus NY-
417 PM EDT Wed Jun 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CATTARAUGUS
COUNTY HAS EXPIRED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been allowed to expire. However small
hail and gusty winds remain possible.
Heavy rain is still possible with this thunderstorm. A flash flood
warning remains in effect for central Cattaraugus county through
early this evening.
LAT...LON 4200 7906 4217 7906 4232 7865 4220 7848
4200 7880
TIME...MOT...LOC 2015Z 058DEG 10KT 4223 7865
$$
JLAThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 1:28 PM EDT | Special Weather Statement | BUF | Cattaraugus | 92 min |
| Jun 9, 2:33 PM EDT | Special Weather Statement | BUF | Allegany | 27 min |
| Jun 9, 2:50 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 25 min |
| Jun 9, 3:02 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 43 min |
| Jun 9, 3:09 PM EDT | Special Weather Statement | BUF | Cattaraugus | 66 min |
| Jun 9, 3:32 PM EDT | Flash Flood Warning | BUF | Allegany | 3 hr |
| Jun 9, 4:00 PM EDT | Flash Flood Warning | BUF | Cattaraugus | 3 hr |
| Jun 9, 4:14 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 61 min |
| Jun 9, 4:35 PM EDT | Special Weather Statement | BUF | Chautauqua | 40 min |
| Jun 9, 5:04 PM EDT | Flash Flood Warning | BUF | Chautauqua | 3 hr |
| Jun 9, 5:13 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 47 min |
| Jun 9, 5:41 PM EDT | Special Weather Statement | BUF | Cattaraugus | 64 min |
| Jun 9, 5:56 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 33 min |
| Jun 9, 6:22 PM EDT | Flash Flood Warning | BUF | Cattaraugus | 116 min |
Nearby
Severe Thunderstorm Warnings in New York, 2021Every severe thunderstorm 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.