Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 77, NWS Buffalo, NY

September 8, 20124 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 8, 2012, 9:51 AM EDT for 4 counties in New York. It was in force for 54 min. 4 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
Sep 8, 2012, 9:51 AM EDT (13:51 UTC)
Expired
Sep 8, 2012, 10:45 AM EDT
In force
54 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Genesee County, NY, Monroe County, NY, Orleans County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 39 km from the middle of the area, began a volume at 13:54 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 8, 10:19 AM EDTTSTM WND DMGLyndonville, NYMULTIPLE TREES AND WIRES DOWN
Sep 8, 10:22 AM EDTTSTM WND DMGMedina, NYMULTIPLE TREES AND WIRES DOWN
Sep 8, 10:25 AM EDTTSTM WND DMGIndian Falls, NYTREES DOWN
Sep 8, 10:50 AM EDTTSTM WND DMGWarsaw, NYTREES 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

Pittsburgh, PA (KPIT), launched 12:00Z, 1.9 hours before the alert went out and 320 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, Pittsburgh, PA at 12:00Z on 2012-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 76 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
76 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
700 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

709 
WUUS51 KBUF 081351
SVRBUF
NYC037-055-073-121-081445-
/O.NEW.KBUF.SV.W.0077.120908T1351Z-120908T1445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
951 AM EDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GENESEE COUNTY IN WESTERN NEW YORK
  NORTHWESTERN MONROE COUNTY IN WESTERN NEW YORK
  ORLEANS COUNTY IN WESTERN NEW YORK
  WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 1045 AM EDT

* AT 945 AM EDT...THE PUBLIC REPORTED A LINE OF SEVERE THUNDERSTORMS
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 22 MILES NORTHWEST
  OF POINT BREEZE TO 21 MILES WEST OF BENNINGTON...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  MEDINA...
  WATERPORT...
  VARYSBURG...
  OAKFIELD...
  BATAVIA...
  KENDALL...
  BYRON...
  BROCKPORT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. 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 4278 7846 4279 7849 4286 7849 4287 7847
      4338 7846 4338 7807 4336 7788 4291 7794
      4290 7796 4268 7797 4260 7846
TIME...MOT...LOC 1350Z 257DEG 32KT 4362 7843 4280 7873

$$

THOMAS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 8:45 AM EDTSpecial Weather StatementBUFCattaraugus, Chautauqua, Erie, Niagara, Orleans90 min
Sep 8, 8:59 AM EDTSpecial Marine WarningBUF64 min
Sep 8, 9:10 AM EDTSpecial Marine WarningBUF95 min
Sep 8, 9:12 AM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie, Niagara63 min
Sep 8, 10:05 AM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus, Erie, Livingston, Wyoming55 min
Sep 8, 10:33 AM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Ontario, Orleans, Wayne and 1 more57 min
Sep 8, 10:40 AM EDTSpecial Marine WarningBUF65 min
Sep 8, 10:55 AM EDTSevere Thunderstorm WarningBUFAllegany, Livingston, Ontario, Wyoming80 min
Sep 8, 11:20 AM EDTSevere Thunderstorm WarningBUFCayuga, Livingston, Monroe, Ontario, Oswego, Wayne70 min
Sep 8, 11:49 AM EDTSpecial Marine WarningBUF86 min
Sep 8, 12:09 PM EDTSevere Thunderstorm WarningBUFCayuga, Jefferson, Oswego66 min
Sep 8, 12:47 PM EDTSpecial Marine WarningBUF118 min
Sep 8, 1:05 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego55 min
Sep 8, 1:47 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis58 min
Sep 8, 4:10 PM EDTSpecial Weather StatementBUFErie50 min
Sep 8, 5:15 PM EDTSpecial Marine WarningBUF50 min
Sep 8, 5:31 PM EDTSpecial Marine WarningBUF44 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.