Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Buffalo, NY

May 2, 2012Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 2, 2012, 7:38 PM EDT for Chautauqua County, Erie County, New York. It was in force for 37 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 2, 2012, 7:38 PM EDT (23:38 UTC)
Expired
May 2, 2012, 8:15 PM EDT
In force
37 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 41 km from the middle of the area, began a volume at 23:37 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

TimeReportWhereRemark
May 2, 7:42 PM EDTHAIL 0.5Lake Erie Beach, NY
May 2, 7:51 PM EDTHAIL 1North Collins, NY

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 40 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2012-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2012-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
98 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.

280 
WUUS51 KBUF 022338
SVRBUF
NYC013-029-030015-
/O.NEW.KBUF.SV.W.0009.120502T2338Z-120503T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
738 PM EDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 815 PM EDT

* AT 733 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
  ANGOLA ON THE LAKE...OR 11 MILES SOUTHWEST OF HAMBURG...AND MOVING
  EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  EDEN...
  NORTH BOSTON...
  BOSTON...
  COLDEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4269 7906 4277 7888 4280 7849 4278 7846
      4253 7847 4251 7860 4247 7870 4248 7874
      4247 7876 4250 7898 4253 7899 4254 7903
      4251 7906 4253 7918
TIME...MOT...LOC 2337Z 269DEG 35KT 4266 7898

$$

THOMAS
2 follow-up statements
108 
WWUS51 KBUF 030003
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
803 PM EDT WED MAY 2 2012

NYC013-030012-
/O.CAN.KBUF.SV.W.0009.000000T0000Z-120503T0015Z/
CHAUTAUQUA NY-
803 PM EDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN
CHAUTAUQUA COUNTY IS CANCELLED...

LAT...LON 4250 7898 4260 7898 4270 7887 4263 7848
      4253 7847 4251 7860 4249 7867 4247 7870
      4248 7870 4247 7876
TIME...MOT...LOC 0002Z 290DEG 28KT 4257 7880

$$

NYC029-030015-
/O.CON.KBUF.SV.W.0009.000000T0000Z-120503T0015Z/
ERIE NY-
803 PM EDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHERN ERIE COUNTY...

AT 756 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 NORTH COLLINS...OR 10 MILES SOUTH OF HAMBURG...MOVING
EAST AT 30 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SOUTH BOSTON...
  SPRINGVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4250 7898 4260 7898 4270 7887 4263 7848
      4253 7847 4251 7860 4249 7867 4247 7870
      4248 7870 4247 7876
TIME...MOT...LOC 0002Z 290DEG 28KT 4257 7880

$$

THOMAS
178 
WWUS51 KBUF 030015
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
815 PM EDT WED MAY 2 2012

NYC029-030025-
/O.EXP.KBUF.SV.W.0009.000000T0000Z-120503T0015Z/
ERIE NY-
815 PM EDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ERIE COUNTY HAS
EXPIRED...

AT 815 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4250 7898 4260 7898 4270 7887 4263 7848
      4253 7847 4251 7860 4249 7867 4247 7870
      4248 7870 4247 7876
TIME...MOT...LOC 0015Z 290DEG 28KT 4253 7867

$$

THOMAS

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 7:09 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua66 min
May 2, 7:17 PM EDTSpecial Weather StatementBUFGenesee43 min
May 2, 7:20 PM EDTSpecial Marine WarningBUF34 min

Nearby

Severe Thunderstorm Warnings in New York, 2012Every severe thunderstorm warning in 2012

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.