Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 103, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Aug 29, 2021, 2:11 PM EDT for 4 counties in New York. It was in force for 64 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
- Aug 29, 2021, 2:11 PM EDT (18:11 UTC)
- Expired
- Aug 29, 2021, 3:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Livingston County, NY, Monroe County, NY, Ontario County, NY, Wayne County, NY
The radar
The Buffalo radar (KBUF), 98 km from the middle of the area, began a volume at 18:11 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, 6.2 hours before the alert went out and 95 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
- 580 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
296 WUUS51 KBUF 291811 SVRBUF NYC051-055-069-117-291915- /O.NEW.KBUF.SV.W.0103.210829T1811Z-210829T1915Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Buffalo NY 211 PM EDT Sun Aug 29 2021 The National Weather Service in Buffalo has issued a * Severe Thunderstorm Warning for... Southwestern Wayne County in western New York... Northeastern Livingston County in western New York... South central Monroe County in western New York... Northern Ontario County in western New York... * Until 315 PM EDT. * At 211 PM EDT, a severe thunderstorm was located near Hemlock, or near Geneseo, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. * Locations impacted include... Canandaigua, Palmyra, Avon, Victor, Honeoye Falls, Bristol, Lima, Bloomfield, Honeoye and Hemlock. This includes the following highways... Interstate 390 between exits 8 and 10. Interstate 90 between exits 45 and 43. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4275 7778 4293 7779 4307 7723 4281 7710 TIME...MOT...LOC 1811Z 255DEG 22KT 4284 7769 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Apffel
2 follow-up statements
861 WWUS51 KBUF 291832 SVSBUF Severe Weather Statement National Weather Service Buffalo NY 232 PM EDT Sun Aug 29 2021 NYC051-055-069-117-291915- /O.CON.KBUF.SV.W.0103.000000T0000Z-210829T1915Z/ Wayne NY-Livingston NY-Monroe NY-Ontario NY- 232 PM EDT Sun Aug 29 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR SOUTHERN WAYNE...NORTHEASTERN LIVINGSTON...SOUTH CENTRAL MONROE AND NORTHERN ONTARIO COUNTIES... At 232 PM EDT, a severe thunderstorm was located near Bloomfield, or 12 miles west of Canandaigua, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. Locations impacted include... Canandaigua, Palmyra, Victor, Honeoye Falls, Bristol, Lima, Bloomfield, Honeoye, Hemlock and Farmington. This includes Interstate 90 between exits 44 and 43. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4276 7761 4293 7765 4307 7723 4281 7710 TIME...MOT...LOC 1832Z 255DEG 22KT 4287 7752 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Apffel
088
WWUS51 KBUF 291906
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
306 PM EDT Sun Aug 29 2021
NYC051-055-069-117-291915-
/O.EXP.KBUF.SV.W.0103.000000T0000Z-210829T1915Z/
Wayne NY-Livingston NY-Monroe NY-Ontario NY-
306 PM EDT Sun Aug 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WAYNE...NORTHEASTERN
LIVINGSTON...SOUTH CENTRAL MONROE AND NORTHERN ONTARIO COUNTIES WILL
EXPIRE AT 315 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 4276 7761 4293 7765 4307 7723 4281 7710
TIME...MOT...LOC 1905Z 255DEG 22KT 4292 7725
$$
ApffelThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 9:06 PM EDT | Special Weather Statement | BUF | Livingston | 54 min |
| Aug 29, 12:04 AM EDT | Special Weather Statement | BUF | Jefferson | 56 min |
| Aug 29, 1:02 AM EDT | Special Weather Statement | BUF | Jefferson, Lewis | 58 min |
| Aug 29, 2:04 AM EDT | Special Weather Statement | BUF | Jefferson | 3 hr |
| Aug 29, 12:03 PM EDT | Special Marine Warning | BUF | 57 min | |
| Aug 29, 12:07 PM EDT | Special Weather Statement | BUF | Niagara | 53 min |
| Aug 29, 12:24 PM EDT | Special Weather Statement | BUF | Chautauqua | 66 min |
| Aug 29, 12:47 PM EDT | Flash Flood Warning | BUF | Niagara | 3 hr |
| Aug 29, 1:55 PM EDT | Special Weather Statement | BUF | Seneca | 35 min |
| Aug 29, 2:04 PM EDT | Special Weather Statement | BUF | Ontario | 41 min |
| Aug 29, 2:30 PM EDT | Special Weather Statement | BUF | Ontario, Wayne | 60 min |
| Aug 29, 3:25 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 20 min |
| Aug 29, 3:38 PM EDT | Severe Thunderstorm Warning | BUF | Ontario | 10 min |
| Aug 29, 3:57 PM EDT | Special Marine Warning | BUF | 62 min | |
| Aug 29, 5:29 PM EDT | Special Weather Statement | BUF | Ontario | 31 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.