Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 8, NWS Buffalo, NY

May 11, 2015Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 11, 2015, 8:59 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 46 min. 1 report 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: May 11, 2015, 8:59 PM EDT (00:59 UTC)
Expired: May 11, 2015, 9:45 PM EDT
In force: 46 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 49 km from the middle of the area, began a volume at 00:58 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
May 11, 9:40 PM EDT	TSTM WND DMG	East Aurora, NY	TREE DOWN MAPLE RD.

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
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, 1.0 hours before the alert went out and 49 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.

279 
WUUS51 KBUF 120059
SVRBUF
NYC009-013-029-120145-
/O.NEW.KBUF.SV.W.0008.150512T0059Z-150512T0145Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ERIE COUNTY IN WESTERN NEW YORK...
  NORTHWESTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  NORTHEASTERN CHAUTAUQUA COUNTY IN WESTERN NEW YORK...

* UNTIL 945 PM EDT

* AT 859 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR SILVER CREEK...OR 7 MILES EAST OF DUNKIRK...AND
  MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HAMBURG...EAST AURORA...EVANS...BOSTON...EDEN...SPRINGVILLE...
  COLDEN AND ORCHARD PARK.

THIS INCLUDES INTERSTATE 90 BETWEEN EXITS 58 AND 57.
 
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 4251 7930 4251 7928 4254 7923 4255 7915
      4261 7911 4265 7906 4269 7905 4270 7899
      4275 7889 4286 7857 4234 7849 4219 7919
TIME...MOT...LOC 0059Z 239DEG 40KT 4250 7919 

$$

CHURCH

2 follow-up statements

388 
WWUS51 KBUF 120125
SVSBUF

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

NYC009-013-029-120145-
/O.CON.KBUF.SV.W.0008.000000T0000Z-150512T0145Z/
ERIE NY-CATTARAUGUS NY-CHAUTAUQUA NY-
925 PM EDT MON MAY 11 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR SOUTHERN ERIE...NORTHWESTERN CATTARAUGUS AND NORTHEASTERN
CHAUTAUQUA COUNTIES...

AT 924 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER EDEN...OR NEAR HAMBURG...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
HAMBURG...EAST AURORA...EVANS...BOSTON...EDEN...SPRINGVILLE...COLDEN
AND ORCHARD PARK.

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 4251 7930 4251 7928 4254 7923 4255 7915
      4261 7911 4265 7906 4269 7905 4270 7899
      4275 7889 4286 7857 4234 7849 4219 7919
TIME...MOT...LOC 0124Z 239DEG 40KT 4265 7886 

$$

THOMAS

396 
WWUS51 KBUF 120146
SVSBUF

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

NYC009-013-029-120155-
/O.EXP.KBUF.SV.W.0008.000000T0000Z-150512T0145Z/
ERIE NY-CATTARAUGUS NY-CHAUTAUQUA NY-
946 PM EDT MON MAY 11 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ERIE...NORTHWESTERN
CATTARAUGUS AND NORTHEASTERN CHAUTAUQUA COUNTIES 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.

LAT...LON 4251 7930 4251 7928 4254 7923 4255 7915
      4261 7911 4265 7906 4269 7905 4270 7899
      4275 7889 4286 7857 4234 7849 4219 7919
TIME...MOT...LOC 0145Z 239DEG 40KT 4265 7886 

$$

CHURCH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 8:26 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	64 min
May 11, 8:53 PM EDT	Special Marine Warning	BUF		2 hr
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.