Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 7, NWS Buffalo, NY

May 11, 2015Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 11, 2015, 8:26 PM EDT for Chautauqua County, 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: May 11, 2015, 8:26 PM EDT (00:26 UTC)
Expired: May 11, 2015, 9:30 PM EDT
In force: 64 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 91 km from the middle of the area, began a volume at 00:28 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 11, 8:18 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.4 hours before the alert went out and 92 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: 14 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1723 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

386 
WUUS51 KBUF 120026
SVRBUF
NYC013-120130-
/O.NEW.KBUF.SV.W.0007.150512T0026Z-150512T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
826 PM EDT MON MAY 11 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHAUTAUQUA COUNTY IN WESTERN NEW YORK...

* UNTIL 930 PM EDT

* AT 825 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR FINDLEY LAKE...OR 30 MILES WEST OF
  JAMESTOWN...AND MOVING EAST AT 40 MPH. PENNY SIZE HAIL MAY ALSO
  ACCOMPANY THE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  JAMESTOWN...DUNKIRK...FREDONIA...WESTFIELD...LAKEWOOD...FALCONER...
  MAYVILLE AND CLYMER.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 90 BETWEEN EXITS 61 AND 59.
 INTERSTATE 86 BETWEEN EXITS 4 AND 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE. THIS IS A VERY
DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.

&&

LAT...LON 4227 7976 4236 7954 4241 7945 4245 7942
      4249 7935 4249 7933 4252 7926 4209 7906
      4200 7906 4200 7976
TIME...MOT...LOC 0025Z 256DEG 33KT 4212 7984 

$$

CHURCH

2 follow-up statements

082 
WWUS51 KBUF 120108
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
908 PM EDT MON MAY 11 2015

NYC013-120130-
/O.CON.KBUF.SV.W.0007.000000T0000Z-150512T0130Z/
CHAUTAUQUA NY-
908 PM EDT MON MAY 11 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR CHAUTAUQUA COUNTY...

AT 907 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED 12 MILES SOUTHEAST OF FREDONIA...MOVING EAST AT 50 MPH. PENNY
SIZE HAIL MAY ALSO ACCOMPANY THE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
JAMESTOWN...DUNKIRK...FREDONIA...WESTFIELD...LAKEWOOD...FALCONER...
MAYVILLE AND CLYMER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4227 7976 4236 7954 4241 7945 4245 7942
      4249 7935 4249 7933 4252 7926 4209 7906
      4200 7906 4200 7976
TIME...MOT...LOC 0107Z 248DEG 44KT 4230 7920 

$$

THOMAS

618 
WWUS51 KBUF 120133
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
933 PM EDT MON MAY 11 2015

NYC013-120142-
/O.EXP.KBUF.SV.W.0007.000000T0000Z-150512T0130Z/
CHAUTAUQUA NY-
933 PM EDT MON MAY 11 2015

...THE SEVERE THUNDERSTORM WARNING FOR CHAUTAUQUA COUNTY HAS
EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS
ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
NORTHERN CHAUTAUQUA COUNTY UNTIL 945PM.

LAT...LON 4227 7976 4236 7954 4241 7945 4245 7942
      4249 7935 4249 7933 4252 7926 4209 7906
      4200 7906 4200 7976
TIME...MOT...LOC 0130Z 256DEG 33KT 4230 7920 

$$

CHURCH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 8:53 PM EDT	Special Marine Warning	BUF		2 hr
May 11, 8:59 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	46 min
May 11, 9:20 PM EDT	Special Weather Statement	BUF	Niagara	40 min
May 11, 9:35 PM EDT	Special Weather Statement	BUF	Cattaraugus	40 min
May 11, 9:45 PM EDT	Special Weather Statement	BUF	Erie, Genesee	45 min
May 11, 9:57 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Orleans, Wyoming	48 min
May 11, 10:28 PM EDT	Special Marine Warning	BUF		62 min
May 11, 10:40 PM EDT	Special Weather Statement	BUF	Monroe	35 min
May 11, 11:21 PM EDT	Special Marine Warning	BUF		114 min
May 12, 3:51 PM EDT	Freeze Watch	BUF	Allegany, Cattaraugus, Lewis	12 hr

Nearby

Severe Thunderstorm Warnings in New York, 2015 Every severe thunderstorm warning in 2015

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.