Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 105, NWS Buffalo, NY

November 14, 2011Allegany County, Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Nov 14, 2011, 6:40 PM EST for Allegany County, Livingston County, Ontario County, New York. It was in force for 20 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: Nov 14, 2011, 6:40 PM EST (23:40 UTC)
Expired: Nov 14, 2011, 7:00 PM EST
In force: 20 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 97 km from the middle of the area, began a volume at 23:40 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, 11.7 hours before the alert went out and 94 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 19 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 294 m²/s²
0-3 km storm-relative helicity: 289 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

162 
WUUS51 KBUF 142340
SVRBUF
NYC003-051-069-150015-
/O.NEW.KBUF.SV.W.0105.111114T2340Z-111115T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
640 PM EST MON NOV 14 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ALLEGANY COUNTY IN WESTERN NEW YORK
  SOUTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK

* UNTIL 715 PM EST

* AT 635 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM GROVELAND TO 16 MILES SOUTHWEST OF DANSVILLE...AND MOVING 
EAST AT 50 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  DANSVILLE...
  CANASERAGA...

LAT...LON 4239 7815 4267 7784 4267 7736 4258 7736
      4257 7737 4257 7765 4254 7765 4253 7767
      4253 7771 4235 7773
TIME...MOT...LOC 2339Z 277DEG 43KT 4261 7773 4243 7790

$$

ZAFF

1 follow-up statement

324 
WWUS51 KBUF 150000
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
700 PM EST MON NOV 14 2011

NYC003-051-069-150011-
/O.CAN.KBUF.SV.W.0105.000000T0000Z-111115T0015Z/
ALLEGANY NY-LIVINGSTON NY-ONTARIO NY-
700 PM EST MON NOV 14 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ONTARIO...
SOUTHERN LIVINGSTON AND NORTHEASTERN ALLEGANY COUNTIES IS
CANCELLED...

AT 701 PM EST NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM WITH THE POSSIBLE TORNADO HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN CANCELLED.

LAT...LON 4239 7815 4267 7784 4267 7736 4258 7736
      4257 7737 4257 7765 4254 7765 4253 7767
      4253 7771 4235 7773
TIME...MOT...LOC 0001Z 277DEG 43KT 4257 7738 4239 7755

$$

ZAFF

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 14, 4:17 PM EST	Special Marine Warning	BUF		88 min
Nov 14, 4:41 PM EST	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	64 min
Nov 14, 4:47 PM EST	Tornado Warning	BUF	Cattaraugus, Chautauqua, Erie	43 min
Nov 14, 4:54 PM EST	Tornado Warning	BUF	Chautauqua	36 min
Nov 14, 5:27 PM EST	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	36 min
Nov 14, 5:30 PM EST	Tornado Warning	BUF	Cattaraugus, Chautauqua	30 min
Nov 14, 5:46 PM EST	Severe Thunderstorm Warning	BUF	Chautauqua	59 min
Nov 14, 5:59 PM EST	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua	61 min
Nov 14, 6:06 PM EST	Tornado Warning	BUF	Cattaraugus	24 min
Nov 14, 6:38 PM EST	Tornado Warning	BUF	Cattaraugus, Chautauqua	37 min
Nov 14, 6:57 PM EST	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	63 min

Nearby

Severe Thunderstorm Warnings in New York, 2011 Every 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.