Alert archive / New York / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 20, NWS Buffalo, NY

June 17, 20146 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 17, 2014, 7:39 PM EDT for 6 counties in New York. It was in force for 66 min. 19 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
Jun 17, 2014, 7:39 PM EDT (23:39 UTC)
Expired
Jun 17, 2014, 8:45 PM EDT
In force
66 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

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

The radar

The Buffalo radar (KBUF), 23 km from the middle of the area, began a volume at 23:41 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
Jun 17, 7:41 PM EDTTSTM WND DMGRidgeway, NYPOLE DOWN
Jun 17, 7:43 PM EDTTSTM WND DMGLyndonville, NYTREE DOWN
Jun 17, 7:50 PM EDTTSTM WND DMGWaterport, NYMULTIPLE TREES AND WIRES DOWN ON PARK AVE.
Jun 17, 7:52 PM EDTTSTM WND DMG2 S Carlton, NYTREES AND WIRES DOWN ON ROUTE 104
Jun 17, 7:52 PM EDTTSTM WND DMGWilson, NYTREES AND POWER LINES DOWN ACROSS TOWNSHIP
Jun 17, 7:55 PM EDTTSTM WND DMGAlbion, NYTREE DOWN
Jun 17, 7:58 PM EDTTSTM WND DMGBarker, NYTREES AND WIRES DOWN
Jun 17, 7:58 PM EDTTSTM WND DMGNewfane, NYTREES AND WIRES DOWN ACROSS TOWN
Jun 17, 7:59 PM EDTTSTM WND DMGSomerset, NYTREES AND WIRES DOWN
Jun 17, 8:06 PM EDTTSTM WND DMG2 Nw Gasport, NYTREE DOWN
Jun 17, 8:09 PM EDTTSTM WND DMGHamlin, NY10 INCH DIAMETER TREE DOWN ON HUNTINGTON PKWY IN HAMLIN
Jun 17, 8:15 PM EDTTSTM WND DMGSpencerport, NY10 UTILITY POLES DOWN
Jun 17, 8:17 PM EDTTSTM WND DMGGates Center, NYTREES AND WIRES DOWN
Jun 17, 8:18 PM EDTTSTM WND DMGSaint Johnsburg, NYTREE DOWN ON NIAGARA FALLS BLVD
Jun 17, 8:20 PM EDTMARINE TSTM WIND 41Irondequoit, NY
Jun 17, 8:24 PM EDTTSTM WND DMGIrondequoit, NYTREES AND WIRES DOWN
Jun 17, 8:30 PM EDTTSTM WND DMGAlabama, NYTREES AND WIRES DOWN HAM RD
Jun 17, 8:37 PM EDTTSTM WND DMGBergen, NYA TREE AND WIRE DOWN ON WEST SWEDEN RD
Jun 17, 8:37 PM EDTTSTM WND DMGElba, NYTREES AND WIRES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 17, 6:51 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.7 hours before the alert went out and 23 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 2014-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 128 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, Buffalo Intl Airport, NY at 12:00Z on 2014-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
128 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1154 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

879 
WUUS51 KBUF 172339
SVRBUF
NYC029-037-055-063-073-121-180045-
/O.NEW.KBUF.SV.W.0020.140617T2339Z-140618T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
739 PM EDT TUE JUN 17 2014

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 845 PM EDT

* AT 737 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 21 MILES NORTH OF POINT BREEZE
  TO 24 MILES WEST OF LEWISTON...OR ALONG A LINE EXTENDING FROM 29
  MILES NORTH OF ALBION TO 19 MILES SOUTHEAST OF HAMILTON...AND
  MOVING SOUTHEAST AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  YOUNGSTOWN...
  LEWISTON...
  NEWFANE...
  SANBORN...
  POINT BREEZE...
  WATERPORT...
  AMHERST...
  KENDALL...
  SLOAN...
  OAKFIELD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING STRONG DAMAGING WINDS 
ACROSS SOUTHERN ONTARIO. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE 
AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4314 7906 4327 7907 4338 7855 4338 7796
      4335 7776 4324 7755 4328 7738 4325 7738
      4269 7866 4277 7887 4284 7887 4287 7890
      4293 7891 4299 7903 4306 7901 4307 7908
TIME...MOT...LOC 2339Z 297DEG 39KT 4365 7823 4310 7949

$$

JJR
2 follow-up statements
815 
WWUS51 KBUF 180019
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
819 PM EDT TUE JUN 17 2014

NYC029-037-055-063-073-121-180045-
/O.CON.KBUF.SV.W.0020.000000T0000Z-140618T0045Z/
GENESEE NY-WYOMING NY-NIAGARA NY-ORLEANS NY-MONROE NY-ERIE NY-
819 PM EDT TUE JUN 17 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR NORTHERN ERIE...NORTHWESTERN MONROE...ORLEANS...NIAGARA...
NORTHWESTERN WYOMING AND GENESEE COUNTIES...

AT 815 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 IRONDEQUOIT TO CHURCHVILLE 
TO MEDINA TO GRAND ISLAND...MOVING SOUTHEAST AT 45 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  BROCKPORT...
  WILLIAMSVILLE...
  EAST PEMBROKE...
  CHURCHVILLE...
  ALDEN...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4314 7906 4327 7907 4338 7855 4338 7796
      4335 7776 4324 7755 4328 7738 4325 7738
      4269 7866 4277 7887 4284 7887 4287 7890
      4293 7891 4299 7903 4306 7901 4307 7908
TIME...MOT...LOC 0018Z 297DEG 39KT 4337 7772 4321 7759
          4308 7779 4327 7799 4315 7833 4299 7899

$$

JJR
112 
WWUS51 KBUF 180045
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
845 PM EDT TUE JUN 17 2014

NYC029-037-055-063-073-121-180051-
/O.EXP.KBUF.SV.W.0020.000000T0000Z-140618T0045Z/
GENESEE NY-WYOMING NY-NIAGARA NY-ORLEANS NY-MONROE NY-ERIE NY-
845 PM EDT TUE JUN 17 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ERIE...NORTHERN
MONROE...ORLEANS...NIAGARA...NORTHWESTERN WYOMING AND GENESEE
COUNTIES WILL EXPIRE AT 845 PM EDT...

AT 841 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE 
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED SLIGHTLY BUT IS 
STILL A STRONG LINE OF STORMS. THE WARNING HAS BEEN ALLOWED TO 
EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
WEDNESDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4314 7906 4327 7907 4338 7855 4338 7796
      4335 7776 4324 7755 4328 7738 4325 7738
      4269 7866 4277 7887 4284 7887 4287 7890
      4293 7891 4299 7903 4306 7901 4307 7908
TIME...MOT...LOC 0041Z 297DEG 39KT 4322 7743 4305 7731
          4293 7751 4312 7770 4301 7805 4286 7871

$$

APFFEL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 2:15 PM EDTSpecial Weather StatementBUFMonroe60 min
Jun 17, 2:20 PM EDTSpecial Weather StatementBUFLivingston55 min
Jun 17, 2:28 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario, Wyoming62 min
Jun 17, 2:40 PM EDTSevere Thunderstorm WarningBUFMonroe, Ontario, Wayne65 min
Jun 17, 2:41 PM EDTSpecial Marine WarningBUF64 min
Jun 17, 3:15 PM EDTSpecial Marine WarningBUF45 min
Jun 17, 3:58 PM EDTSpecial Marine WarningBUF62 min
Jun 17, 6:28 PM EDTSpecial Marine WarningBUF92 min
Jun 17, 6:33 PM EDTSpecial Marine WarningBUF57 min
Jun 17, 7:00 PM EDTSpecial Marine WarningBUF60 min
Jun 17, 7:08 PM EDTSevere Thunderstorm WarningBUFMonroe, Niagara, Orleans67 min
Jun 17, 7:27 PM EDTSpecial Marine WarningBUF33 min
Jun 17, 7:29 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis46 min
Jun 17, 7:56 PM EDTSpecial Marine WarningBUF64 min
Jun 17, 7:59 PM EDTSpecial Marine WarningBUF91 min

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.