Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 12, NWS Buffalo, NY

May 3, 20124 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 3, 2012, 10:43 PM EDT for 4 counties in New York. It was in force for 62 min. 6 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 3, 2012, 10:43 PM EDT (02:43 UTC)
Expired
May 3, 2012, 11:45 PM EDT
In force
62 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Livingston County, NY, Monroe County, NY, Ontario County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 122 km from the middle of the area, began a volume at 02:43 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 3, 10:47 PM EDTTSTM WND DMGAvon, NYTREE DOWN IN AVON
May 3, 10:59 PM EDTTSTM WND DMGVictor, NYTREES DOWN
May 3, 11:03 PM EDTTSTM WND DMGEast Bloomfield, NYTREES DOWN
May 3, 11:05 PM EDTTSTM WND DMGFarmington, NYTREES DOWN
May 3, 11:08 PM EDTTSTM WND DMG2 N Geneseo, NYTREE DOWN
May 3, 11:33 PM EDTTSTM WND DMGBristol, NYTREES 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 00:00Z, 2.7 hours before the alert went out and 119 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 00:00Z on 2012-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 842 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2012-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 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
842 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1453 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

537 
WUUS51 KBUF 040243
SVRBUF
NYC051-055-069-117-040345-
/O.NEW.KBUF.SV.W.0012.120504T0243Z-120504T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1043 PM EDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHEASTERN MONROE COUNTY IN WESTERN NEW YORK
  NORTHERN ONTARIO COUNTY IN WESTERN NEW YORK
  WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 1145 PM EDT

* AT 1038 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS       
  WERE LOCATED ALONG A LINE EXTENDING FROM WEBSTER TO AVON...AND     
  MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  LIMA...
  WILLIAMSON...
  SODUS...
  MARION...
  CANANDAIGUA...
  NEWARK...
  LYONS...
  PHELPS...
  GENEVA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. 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 4281 7795 4293 7793 4325 7755 4329 7737
      4328 7695 4332 7679 4335 7672 4301 7689
      4300 7695 4290 7695 4281 7701
TIME...MOT...LOC 0242Z 270DEG 34KT 4323 7731 4294 7770

$$

HITCHCOCK
2 follow-up statements
593 
WWUS51 KBUF 040313
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1113 PM EDT THU MAY 3 2012

NYC055-040323-
/O.CAN.KBUF.SV.W.0012.000000T0000Z-120504T0345Z/
MONROE NY-
1113 PM EDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MONROE COUNTY IS
CANCELLED...

THE LINE OF THUNDERSTORMS HAS MOVED SOUTHEAST OF THE COUNTY.

LAT...LON 4282 7788 4290 7783 4295 7762 4294 7749
      4298 7748 4300 7740 4322 7719 4335 7672
      4301 7689 4300 7695 4290 7695 4281 7701
TIME...MOT...LOC 0313Z 270DEG 34KT 4316 7687 4283 7769

$$

NYC051-069-117-040345-
/O.CON.KBUF.SV.W.0012.000000T0000Z-120504T0345Z/
LIVINGSTON NY-ONTARIO NY-WAYNE NY-
1113 PM EDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR WAYNE...NORTHERN ONTARIO AND NORTHERN LIVINGSTON COUNTIES...

AT 1112 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS 
WERE LOCATED ALONG A LINE EXTENDING FROM NORTH ROSE TO 
LIVONIA...MOVING EAST AT 40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  WOLCOTT...
  SHORTSVILLE...
  BRISTOL...
  CANANDAIGUA...
  PHELPS...
  COTTAGE CITY...

LAT...LON 4282 7788 4290 7783 4295 7762 4294 7749
      4298 7748 4300 7740 4322 7719 4335 7672
      4301 7689 4300 7695 4290 7695 4281 7701
TIME...MOT...LOC 0313Z 270DEG 34KT 4316 7687 4283 7769

$$

HITCHCOCK
551 
WWUS51 KBUF 040347 RRA
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1147 PM EDT THU MAY 3 2012

NYC051-069-117-040355-
/O.EXP.KBUF.SV.W.0012.000000T0000Z-120504T0345Z/
LIVINGSTON NY-ONTARIO NY-WAYNE NY-
1147 PM EDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR WAYNE...NORTHERN ONTARIO AND
NORTHEASTERN LIVINGSTON COUNTIES HAS EXPIRED...

AT 1145 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THIS WARNING HAD EXITED THE WARNED AREA...
A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR PORTIONS OF 
SOUTHERN LIVINGSTON...SOUTHERN ONTARIO...AND SOUTHEASTERN WAYNE COUNTY. 

LAT...LON 4282 7788 4290 7783 4295 7762 4294 7749
      4298 7748 4300 7740 4322 7719 4335 7672
      4301 7689 4300 7695 4290 7695 4281 7701
TIME...MOT...LOC 0313Z 270DEG 34KT 4316 7687 4284 7753

$$

THOMAS

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 10:40 PM EDTSpecial Marine WarningBUF80 min
May 3, 11:22 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario37 min
May 3, 11:40 PM EDTSpecial Weather StatementBUFJefferson, Oswego65 min
May 3, 11:42 PM EDTSevere Thunderstorm WarningBUFCayuga, Wayne29 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.