Alert archive / New York / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 66, NWS Buffalo, NY

August 12, 2014Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 12, 2014, 4:49 PM EDT for Erie County, Niagara County, New York. It was in force for 44 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
Aug 12, 2014, 4:49 PM EDT (20:49 UTC)
Expired
Aug 12, 2014, 5:33 PM EDT
In force
44 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 12 km from the middle of the area, began a volume at 20:49 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
Aug 12, 4:57 PM EDTTSTM WND DMG2 Nw Buffalo, NYLARGE TREE DOWN ON THE WEST SIDE
Aug 12, 5:00 PM EDTTSTM WND DMG2 N Buffalo, NYLARGE TREE LIMB DOWN...IN CITY OF BUFFALO ON DELAWARE AVE BETWEEN UTICA AVE AND LEXINGTON

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, 8.8 hours before the alert went out and 15 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 2014-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 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 2014-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 339 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
38 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
748 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
339 m²/s²
0-3 km storm-relative helicity
370 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

837 
WUUS51 KBUF 122049
SVRBUF
NYC029-063-122145-
/O.NEW.KBUF.SV.W.0066.140812T2049Z-140812T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
449 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ERIE COUNTY IN WESTERN NEW YORK
  SOUTH CENTRAL NIAGARA COUNTY IN WESTERN NEW YORK

* UNTIL 545 PM EDT

* AT 445 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR BUFFALO...AND MOVING
  NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  BUFFALO...
  TONAWANDA...
  GRAND ISLAND...
  KENMORE...
  WILLIAMSVILLE...
  AMHERST...
  HARRIS HILL...
  AKRON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...AND DEADLY CLOUD TO 
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4306 7901 4328 7852 4292 7849 4280 7887
      4282 7888 4285 7887 4287 7891 4294 7892
      4296 7899 4300 7903 4302 7903
TIME...MOT...LOC 2049Z 246DEG 25KT 4291 7889

$$

REYNOLDS
2 follow-up statements
073 
WWUS51 KBUF 122119
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
519 PM EDT TUE AUG 12 2014

NYC029-063-122145-
/O.CON.KBUF.SV.W.0066.000000T0000Z-140812T2145Z/
NIAGARA NY-ERIE NY-
519 PM EDT TUE AUG 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN ERIE AND SOUTH CENTRAL NIAGARA COUNTIES...

AT 514 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR HARRIS HILL...OR NEAR
WILLIAMSVILLE...MOVING NORTHEAST AT 30 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
AMHERST...
CLARENCE...
WILLIAMSVILLE...
NORTH TONAWANDA...
PENDLETON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4284 7878 4306 7895 4328 7852 4292 7849
TIME...MOT...LOC 2117Z 246DEG 25KT 4299 7865

$$
REYNOLDS
711 
WWUS51 KBUF 122133
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
533 PM EDT TUE AUG 12 2014

NYC029-063-122143-
/O.CAN.KBUF.SV.W.0066.000000T0000Z-140812T2145Z/
NIAGARA NY-ERIE NY-
533 PM EDT TUE AUG 12 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE AND SOUTH
CENTRAL NIAGARA COUNTIES IS CANCELLED...

AT 533 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 CANCELLED.

LAT...LON 4284 7878 4306 7895 4328 7852 4292 7849
TIME...MOT...LOC 2133Z 246DEG 25KT 4303 7851

$$

REYNOLDS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 4:13 PM EDTSpecial Marine WarningBUF62 min
Aug 12, 4:33 PM EDTSpecial Weather StatementBUFErie57 min
Aug 12, 4:58 PM EDTSpecial Weather StatementBUFErie62 min
Aug 12, 5:08 PM EDTSpecial Weather StatementBUFCattaraugus52 min
Aug 12, 5:26 PM EDTSmall Craft AdvisoryBUF5 days
Aug 12, 5:37 PM EDTSpecial Weather StatementBUFNiagara53 min
Aug 12, 6:00 PM EDTSpecial Weather StatementBUFCattaraugus60 min
Aug 12, 6:35 PM EDTSpecial Weather StatementBUFGenesee, Orleans, Wyoming55 min
Aug 12, 7:00 PM EDTSpecial Weather StatementBUFCattaraugus60 min
Aug 12, 7:18 PM EDTFlash Flood WarningBUFAllegany, Cattaraugus, Wyoming4 hr

Nearby

Severe Thunderstorm Warnings in New York, 2014Every severe thunderstorm warning in 2014

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.