Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS Buffalo, NY

September 7, 20124 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 7, 2012, 6:08 PM EDT for 4 counties in New York. It was in force for 67 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
Sep 7, 2012, 6:08 PM EDT (22:08 UTC)
Expired
Sep 7, 2012, 7:15 PM EDT
In force
67 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

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

The radar

The Buffalo radar (KBUF), 59 km from the middle of the area, began a volume at 22:10 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
Sep 7, 6:50 PM EDTTSTM WND DMGCastile, NYREPORT OF A COUPLE OF TREES 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, 10.1 hours before the alert went out and 56 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 2012-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 795 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 12:00Z on 2012-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.19395878Sfc1 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
795 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
884 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

877 
WUUS51 KBUF 072208
SVRBUF
NYC003-009-051-121-072315-
/O.NEW.KBUF.SV.W.0073.120907T2208Z-120907T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
608 PM EDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK
  NORTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK
  SOUTHWESTERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 715 PM EDT

* AT 606 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
  ARCADE...OR 22 MILES SOUTHEAST OF EAST AURORA...AND MOVING
  NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  BLISS...
  PORTAGEVILLE...
  MOUNT MORRIS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4239 7842 4253 7850 4253 7847 4258 7846
      4282 7785 4257 7770
TIME...MOT...LOC 2208Z 246DEG 20KT 4252 7834

$$

TJP
3 follow-up statements
349 
WWUS51 KBUF 072230
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
630 PM EDT FRI SEP 7 2012

NYC003-009-051-121-072315-
/O.CON.KBUF.SV.W.0073.000000T0000Z-120907T2315Z/
ALLEGANY NY-CATTARAUGUS NY-LIVINGSTON NY-WYOMING NY-
630 PM EDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHERN WYOMING...SOUTHWESTERN LIVINGSTON...NORTHEASTERN
CATTARAUGUS AND NORTHWESTERN ALLEGANY COUNTIES...

AT 627 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 BLISS...OR 25 MILES SOUTHEAST OF EAST AURORA...MOVING 
NORTHEAST AT 30 MPH. A SECOND STRONG TO SEVERE STORM WAS LOCATED 
JUST SOUTHEAST OF DELEVAN.  

SOME LOCATIONS IN THE WARNING INCLUDE...
  PIKE...
  GAINESVILLE...
  SILVER SPRINGS...
  CASTILE...
  PERRY...
  MOUNT MORRIS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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 4239 7842 4253 7850 4253 7847 4258 7846
      4282 7785 4257 7770
TIME...MOT...LOC 2229Z 239DEG 25KT 4256 7821

$$

TJP
331 
WWUS51 KBUF 072306
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
706 PM EDT FRI SEP 7 2012

NYC003-009-072316-
/O.CAN.KBUF.SV.W.0073.000000T0000Z-120907T2315Z/
ALLEGANY NY-CATTARAUGUS NY-
706 PM EDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CATTARAUGUS AND
NORTHWESTERN ALLEGANY COUNTIES IS CANCELLED...

LAT...LON 4258 7805 4270 7814 4282 7785 4257 7770
TIME...MOT...LOC 2306Z 239DEG 25KT 4269 7790

$$

NYC051-121-072315-
/O.CON.KBUF.SV.W.0073.000000T0000Z-120907T2315Z/
LIVINGSTON NY-WYOMING NY-
706 PM EDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EAST CENTRAL WYOMING AND CENTRAL LIVINGSTON COUNTIES...

AT 659 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR PERRY...OR 12 MILES SOUTHWEST OF
GENESEO...MOVING NORTHEAST AT 30 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SONYEA...LEICESTER AND NUNDA.

LAT...LON 4258 7805 4270 7814 4282 7785 4257 7770
TIME...MOT...LOC 2306Z 239DEG 25KT 4269 7790

$$

RSH
751 
WWUS51 KBUF 072314
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
714 PM EDT FRI SEP 7 2012

NYC051-121-072325-
/O.EXP.KBUF.SV.W.0073.000000T0000Z-120907T2315Z/
LIVINGSTON NY-WYOMING NY-
714 PM EDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WYOMING AND
CENTRAL LIVINGSTON COUNTIES HAS EXPIRED...

AT 715 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 4258 7805 4270 7814 4282 7785 4257 7770
TIME...MOT...LOC 2315Z 239DEG 25KT 4272 7783

$$

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 3:44 PM EDTGale WarningBUF24 hr
Sep 7, 3:44 PM EDTSmall Craft AdvisoryBUF36 hr
Sep 7, 6:03 PM EDTSpecial Weather StatementBUFWyoming57 min
Sep 7, 6:41 PM EDTSpecial Weather StatementBUFCattaraugus64 min
Sep 7, 6:50 PM EDTSpecial Weather StatementBUFLivingston55 min
Sep 7, 7:10 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario41 min
Sep 7, 7:33 PM EDTSevere Thunderstorm WarningBUFMonroe, Wayne27 min
Sep 7, 7:37 PM EDTSpecial Marine WarningBUF53 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.