Alert archive / New York / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 16, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at May 23, 2011, 10:05 PM EDT for Allegany County, Cattaraugus County, New York. It was in force for 25 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
- May 23, 2011, 10:05 PM EDT (02:05 UTC)
- Expired
- May 23, 2011, 10:30 PM EDT
- In force
- 25 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
Counties Allegany County, NY, Cattaraugus County, NY
The radar
The Buffalo radar (KBUF), 95 km from the middle of the area, began a volume at 02:05 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, 2.1 hours before the alert went out and 93 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
- 191 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
574 WUUS51 KBUF 240205 SVRBUF NYC003-009-240230- /O.NEW.KBUF.SV.W.0016.110524T0205Z-110524T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BUFFALO NY 1005 PM EDT MON MAY 23 2011 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK SOUTHERN CATTARAUGUS COUNTY IN WESTERN NEW YORK * UNTIL 1030 PM EDT * AT 1001 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ALLEGANY PARK...OR 8 MILES SOUTHWEST OF SALAMANCA...AND MOVING EAST AT 45 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE... ALLEGANY STATE PARK... SALAMANCA... WESTON MILLS... LIMESTONE... OLEAN... PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! && LAT...LON 4215 7889 4222 7820 4199 7818 4199 7887 TIME...MOT...LOC 0204Z 265DEG 38KT 4207 7876 $$ HIBBERT
2 follow-up statements
367 WWUS51 KBUF 240223 SVSBUF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 1023 PM EDT MON MAY 23 2011 NYC003-009-240230- /O.CON.KBUF.SV.W.0016.000000T0000Z-110524T0230Z/ ALLEGANY NY-CATTARAUGUS NY- 1023 PM EDT MON MAY 23 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT FOR SOUTHEASTERN CATTARAUGUS AND SOUTHWESTERN ALLEGANY COUNTIES... AT 1020 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR THE EASTERN EDGE OF ALLEGANY STATE PARK...MOVING EAST AT 45 MPH. SOME LOCATIONS IN THE WARNING INCLUDE... ALLEGANY STATE PARK... OLEAN... PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE ACROSS SOUTHERN CHAUTAUQUA COUNTY. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! && LAT...LON 4218 7861 4222 7820 4199 7818 4199 7873 TIME...MOT...LOC 0222Z 265DEG 38KT 4209 7850 $$ HIBBERT
048 WWUS51 KBUF 240236 SVSBUF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 1036 PM EDT MON MAY 23 2011 NYC003-009-240245- /O.EXP.KBUF.SV.W.0016.000000T0000Z-110524T0230Z/ ALLEGANY NY-CATTARAUGUS NY- 1036 PM EDT MON MAY 23 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CATTARAUGUS AND SOUTHWESTERN ALLEGANY COUNTIES HAS BEEN REPLACED BY ANOTHER SEVERE THUNDERSTORM WARNING... LAT...LON 4218 7861 4222 7820 4199 7818 4199 7873 TIME...MOT...LOC 0223Z 265DEG 38KT 4209 7849 $$ RSH
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:23 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 37 min |
| May 23, 8:45 PM EDT | Special Marine Warning | BUF | 30 min | |
| May 23, 8:54 PM EDT | Tornado Warning | BUF | Chautauqua | 36 min |
| May 23, 9:14 PM EDT | Severe Thunderstorm Warning | BUF | Erie | 17 min |
| May 23, 9:24 PM EDT | Flash Flood Warning | BUF | Chautauqua | 3 hr |
| May 23, 9:59 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 3 hr |
| May 23, 10:30 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 45 min |
| May 23, 10:56 PM EDT | Areal Flood Advisory | BUF | Cattaraugus, Chautauqua, Erie, Wyoming | 3 hr |
| May 23, 11:09 PM EDT | Flash Flood Warning | BUF | Allegany, Cattaraugus, Wyoming | 3 hr |
| May 23, 11:13 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 17 min |
| May 24, 9:27 AM EDT | Small Craft Advisory | BUF | 4 hr |
Nearby
Severe Thunderstorm Warnings in New York, 2011Every severe thunderstorm warning in 2011
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.