Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 80, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 20, 2021, 4:23 PM EDT for 4 counties in New York. It was in force for 67 min. 12 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 20, 2021, 4:23 PM EDT (20:23 UTC)
- Expired
- Jul 20, 2021, 5:30 PM EDT
- In force
- 67 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Erie County, NY, Genesee County, NY, Niagara County, NY, Orleans County, NY
The radar
The Buffalo radar (KBUF), 24 km from the middle of the area, began a volume at 20:24 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 4:34 PM EDT | HAIL 1.5 | 1 S Lockport, NY | REPORT FROM MPING: PING PONG BALL (1.50 IN.). |
| Jul 20, 4:35 PM EDT | HAIL 1 | 1 Ne Lockport, NY | |
| Jul 20, 4:41 PM EDT | HAIL 1.25 | 2 Se Cambria Center, NY | HALF DOLLAR (1.25 IN) HAIL REPORTED IN CAMBRIA CENTER. |
| Jul 20, 4:43 PM EDT | HAIL 1.25 | 1 Ene Lockport, NY | HAIL REPORTED ON HOWARD AVENUE IN LOCKPORT. |
| Jul 20, 4:51 PM EDT | HAIL 0.75 | 4 Ne Lewiston, NY | DIME SIZED HAIL (0.75IN) REPORTED IN NORTHEAST LEWISTON. |
| Jul 20, 4:53 PM EDT | HAIL 0.5 | 1 Nnw Lockport, NY | 0.5IN HAIL REPORTED IN LOCKPORT. |
| Jul 20, 4:57 PM EDT | HAIL 1 | 2 W Lockport, NY | QUARTER SIZED (1.00IN) HAIL REPORTED WEST OF THE TOWN OF LOCKPORT. |
| Jul 20, 4:58 PM EDT | HAIL 1 | 2 Se Cambria Center, NY | QUARTER SIZED (1.00 IN) HAIL REPORTED IN CAMBRIA CENTER. |
| Jul 20, 5:07 PM EDT | HAIL 1 | 1 S Lockport, NY | QUARTER SIZED (1.00IN) HAIL REPORTED IN THE TOWN OF LOCKPORT. |
| Jul 20, 5:12 PM EDT | HAIL 0.5 | 1 Nnw Lockport, NY | HALF-INCH (0.50 IN) HAIL REPORTED IN THE TOWN OF LOCKPORT. |
| Jul 20, 5:13 PM EDT | HAIL 0.88 | 3 S Lockport, NY | NICKLE SIZED (0.88IN) SIZED HAIL REPORTED AT THE INTERSECTION OF TRANSIT RD AND ROBINSON RD IN SOUTH LOCKPORT. |
| Jul 20, 5:24 PM EDT | TSTM WND DMG | 3 Ne Rapids, NY | TREES DOWN IN ROYALTON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 20, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.4 hours before the alert went out and 26 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
- 574 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted.
520
WUUS51 KBUF 202023
SVRBUF
NYC029-037-063-073-202130-
/O.NEW.KBUF.SV.W.0080.210720T2023Z-210720T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
423 PM EDT Tue Jul 20 2021
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Northeastern Erie County in western New York...
Niagara County in western New York...
Southwestern Orleans County in western New York...
Northwestern Genesee County in western New York...
* Until 530 PM EDT..
* At 423 PM EDT, a severe thunderstorm was located near Lockport,
moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Lockport, Newfane, Pendleton, Pembroke, Akron, Middleport, Sanborn,
Cambria Center, Pendleton Center and Ransomville.
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 4312 7899 4328 7899 4330 7841 4298 7842
TIME...MOT...LOC 2023Z 273DEG 14KT 4318 7878
HAIL...1.00IN
WIND...60MPH
$$
Reynolds1 follow-up statement
883
WWUS51 KBUF 202057
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
457 PM EDT Tue Jul 20 2021
NYC029-037-063-073-202130-
/O.CON.KBUF.SV.W.0080.000000T0000Z-210720T2130Z/
Erie NY-Niagara NY-Orleans NY-Genesee NY-
457 PM EDT Tue Jul 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN ERIE...NIAGARA...SOUTHWESTERN ORLEANS AND
NORTHWESTERN GENESEE COUNTIES...
At 456 PM EDT, a severe thunderstorm was located near Lockport,
moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Lockport, Newfane, Pendleton, Pembroke, Akron, Middleport, Sanborn,
Cambria Center, Pendleton Center and Ransomville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4312 7899 4328 7899 4330 7841 4298 7842
TIME...MOT...LOC 2056Z 273DEG 14KT 4317 7860
HAIL...1.00IN
WIND...60MPH
$$
EAJThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:13 PM EDT | Special Marine Warning | BUF | 62 min | |
| Jul 20, 2:57 PM EDT | Special Weather Statement | BUF | Niagara | 48 min |
| Jul 20, 3:14 PM EDT | Special Marine Warning | BUF | 61 min | |
| Jul 20, 3:23 PM EDT | Severe Thunderstorm Warning | BUF | Niagara | 67 min |
| Jul 20, 3:39 PM EDT | Special Marine Warning | BUF | 81 min | |
| Jul 20, 3:48 PM EDT | Special Marine Warning | BUF | 87 min | |
| Jul 20, 4:08 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis | 67 min |
| Jul 20, 4:42 PM EDT | Severe Thunderstorm Warning | BUF | Niagara | 48 min |
| Jul 20, 4:46 PM EDT | Special Marine Warning | BUF | 59 min | |
| Jul 20, 4:49 PM EDT | Flash Flood Warning | BUF | Niagara | 6 hr |
| Jul 20, 4:55 PM EDT | Special Marine Warning | BUF | 48 min | |
| Jul 20, 4:58 PM EDT | Special Marine Warning | BUF | 92 min | |
| Jul 20, 5:00 PM EDT | Special Weather Statement | BUF | Genesee | 30 min |
| Jul 20, 5:10 PM EDT | Special Marine Warning | BUF | 2 hr | |
| Jul 20, 5:13 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis, Oswego | 62 min |
| Jul 20, 5:28 PM EDT | Special Weather Statement | BUF | Oswego | 47 min |
| Jul 20, 5:30 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara, Orleans | 60 min |
| Jul 20, 5:43 PM EDT | Special Marine Warning | BUF | 92 min | |
| Jul 20, 5:43 PM EDT | Severe Thunderstorm Warning | BUF | Oswego | 62 min |
| Jul 20, 5:56 PM EDT | Special Weather Statement | BUF | Genesee, Monroe, Ontario, Orleans | 34 min |
| Jul 20, 6:07 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Jefferson, Lewis, Oswego, Wayne | 38 min |
| Jul 20, 6:21 PM EDT | Flash Flood Warning | BUF | Erie, Niagara | 4 hr |
| Jul 20, 6:26 PM EDT | Special Marine Warning | BUF | 34 min | |
| Jul 20, 6:30 PM EDT | Special Weather Statement | BUF | Erie, Genesee | 30 min |
| Jul 20, 6:37 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara | 46 min |
| Jul 20, 6:46 PM EDT | Special Weather Statement | BUF | Lewis | 29 min |
| Jul 20, 6:52 PM EDT | Special Marine Warning | BUF | 67 min | |
| Jul 20, 7:24 PM EDT | Special Weather Statement | BUF | Erie, Genesee, Livingston, Ontario, Wyoming | 36 min |
| Jul 20, 7:38 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Monroe, Ontario, Wayne | 31 min |
| Jul 20, 7:58 PM EDT | Special Weather Statement | BUF | Livingston, Wyoming | 92 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.