Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jun 9, 2021, 4:14 PM EDT for Allegany County, New York. It was in force for 61 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, 4:14 PM EDT (20:14 UTC)
- Expired
- Jun 9, 2021, 5:15 PM EDT
- In force
- 61 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Allegany County, NY
The radar
The Buffalo radar (KBUF), 100 km from the middle of the area, began a volume at 20:17 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, 8.2 hours before the alert went out and 96 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.
395
WUUS51 KBUF 092014
SVRBUF
NYC003-092115-
/O.NEW.KBUF.SV.W.0012.210609T2014Z-210609T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
414 PM EDT Wed Jun 9 2021
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Southeastern Allegany County in western New York...
* Until 515 PM EDT..
* At 413 PM EDT, a severe thunderstorm was located near Alfred, or
near Hornell, moving southwest at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Wellsville, Alfred, Scio, Andover, Belmont, Angelica, Almond, West
Almond and Knight Creek.
This includes Interstate 86 between exits 30 and 33.
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 4230 7817 4242 7773 4240 7773 4219 7774
4206 7801
TIME...MOT...LOC 2013Z 064DEG 11KT 4231 7775
HAIL...0.75IN
WIND...60MPH
$$
Mitchell2 follow-up statements
962 WWUS51 KBUF 092057 SVSBUF Severe Weather Statement National Weather Service Buffalo NY 457 PM EDT Wed Jun 9 2021 NYC003-092115- /O.CON.KBUF.SV.W.0012.000000T0000Z-210609T2115Z/ Allegany NY- 457 PM EDT Wed Jun 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR CENTRAL ALLEGANY COUNTY... At 455 PM EDT, a severe thunderstorm was located near Alfred, or 9 miles north of Wellsville, moving southwest at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Wellsville, Scio, Belmont, Angelica and Knight Creek. This includes Interstate 86 between exits 30 and 31. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4235 7797 4216 7783 4209 7803 4230 7817 TIME...MOT...LOC 2055Z 064DEG 11KT 4225 7791 HAIL...0.75IN WIND...60MPH $$ Mitchell
737
WWUS51 KBUF 092118
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
518 PM EDT Wed Jun 9 2021
NYC003-092125-
/O.EXP.KBUF.SV.W.0012.000000T0000Z-210609T2115Z/
Allegany NY-
518 PM EDT Wed Jun 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ALLEGANY COUNTY HAS
EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire. However heavy rain is still occurring with
this thunderstorm as it moves into the Clarksville area where a
flash flood warning is currently in effect.
LAT...LON 4235 7797 4216 7783 4209 7803 4230 7817
TIME...MOT...LOC 2115Z 064DEG 11KT 4223 7796
$$
MitchellThe 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, 3:18 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus | 57 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, 4:35 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.