Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 11, NWS Buffalo, NY

May 18, 2015Allegany County, Cattaraugus County, Livingston County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 18, 2015, 7:36 PM EDT for Allegany County, Cattaraugus County, Livingston County, New York. It was in force for 54 min. 2 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: May 18, 2015, 7:36 PM EDT (23:36 UTC)
Expired: May 18, 2015, 8:30 PM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Cattaraugus County, NY, Livingston County, NY

The radar

The Buffalo radar (KBUF), 86 km from the middle of the area, began a volume at 23:35 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 18, 7:41 PM EDT	TSTM WND DMG	1 Ne Rawson, NY	TREES AND POWER LINES DOWN
May 18, 7:41 PM EDT	TSTM WND DMG	1 N Rawson, NY	TREES AND POWER LINES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.6 hours before the alert went out and 83 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: 297 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 774 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

668 
WUUS51 KBUF 182336
SVRBUF
NYC003-009-051-190030-
/O.NEW.KBUF.SV.W.0011.150518T2336Z-150519T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
736 PM EDT MON MAY 18 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL LIVINGSTON COUNTY IN WESTERN NEW YORK...
  EAST CENTRAL CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  NORTHERN ALLEGANY COUNTY IN WESTERN NEW YORK...

* UNTIL 830 PM EDT

* AT 735 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS 
  STORM WAS LOCATED OVER FRANKLINVILLE...OR 15 MILES NORTH OF 
  OLEAN...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DANSVILLE...ALFRED...FRANKLINVILLE...BELFAST...RUSHFORD...
  HOUGHTON...CANEADEA AND ANGELICA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 390 BETWEEN EXITS 4 AND 5.
 INTERSTATE 86 BETWEEN EXITS 30 AND 33.

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. THE STORM IS ALSO PRODUCING VERY HEAVY RAIN 
WITH RAINFALL AMOUNTS OF AN INCH OR MORE IN LESS THAN AN HOURS TIME. 

&&

LAT...LON 4224 7847 4243 7846 4259 7764 4258 7764
      4258 7766 4253 7766 4253 7772 4223 7774
TIME...MOT...LOC 2335Z 252DEG 33KT 4232 7842 

$$

RSH

2 follow-up statements

393 
WWUS51 KBUF 190004
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
804 PM EDT MON MAY 18 2015

NYC009-190013-
/O.CAN.KBUF.SV.W.0011.000000T0000Z-150519T0030Z/
CATTARAUGUS NY-
804 PM EDT MON MAY 18 2015

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CATTARAUGUS
COUNTY IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4224 7819 4247 7825 4259 7764 4258 7764
      4258 7766 4253 7766 4253 7772 4223 7774
TIME...MOT...LOC 0003Z 252DEG 33KT 4240 7808 

$$

NYC003-051-190030-
/O.CON.KBUF.SV.W.0011.000000T0000Z-150519T0030Z/
LIVINGSTON NY-ALLEGANY NY-
804 PM EDT MON MAY 18 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTH CENTRAL LIVINGSTON AND NORTHERN ALLEGANY COUNTIES...

AT 803 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR BELFAST...OR 17 MILES SOUTH OF LETCHWORTH STATE PARK...
MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
DANSVILLE...ALFRED...BELFAST...HOUGHTON...CANEADEA...ANGELICA...
OSSIAN AND CANASERAGA.

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 4224 7819 4247 7825 4259 7764 4258 7764
      4258 7766 4253 7766 4253 7772 4223 7774
TIME...MOT...LOC 0003Z 252DEG 33KT 4240 7808 

$$

HIBBERT

760 
WWUS51 KBUF 190032
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
832 PM EDT MON MAY 18 2015

NYC003-051-190042-
/O.EXP.KBUF.SV.W.0011.000000T0000Z-150519T0030Z/
LIVINGSTON NY-ALLEGANY NY-
832 PM EDT MON MAY 18 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LIVINGSTON AND
NORTHERN ALLEGANY COUNTIES HAS EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER HEAVY RAIN
IS STILL POSSIBLE IN THE WAKE OF THIS THUNDERSTORM.

LAT...LON 4224 7819 4247 7825 4259 7764 4258 7764
      4258 7766 4253 7766 4253 7772 4223 7774
TIME...MOT...LOC 0029Z 252DEG 33KT 4240 7808 

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 4:39 AM EDT	Small Craft Advisory	BUF		63 hr
May 18, 1:38 PM EDT	Special Weather Statement	BUF	Cayuga	37 min
May 18, 2:22 PM EDT	Special Weather Statement	BUF	Oswego	38 min
May 18, 4:37 PM EDT	Special Weather Statement	BUF	Oswego	53 min
May 18, 4:54 PM EDT	Special Weather Statement	BUF	Wayne	36 min
May 18, 5:33 PM EDT	Special Weather Statement	BUF	Chautauqua	57 min
May 18, 6:27 PM EDT	Special Weather Statement	BUF	Cattaraugus	48 min
May 18, 6:54 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus	66 min

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.