Alert archive / New York / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 17, NWS Buffalo, NY

May 21, 2013Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 21, 2013, 12:32 PM EDT for Ontario County, Wayne County, New York. It was in force for 58 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
May 21, 2013, 12:32 PM EDT (16:32 UTC)
Expired
May 21, 2013, 1:30 PM EDT
In force
58 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Ontario County, NY, Wayne County, NY

The radar

The Binghamton radar (KBGM), 125 km from the middle of the area, began a volume at 16:35 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 21, 12:39 PM EDTTSTM WND DMGManchester Center, NY3-4 INCH DIAMETER TREE BRANCH DOWN IN ROAD...REPORTED BY POSTAL CARRIER.

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, 4.5 hours before the alert went out and 133 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 2013-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1788 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 2013-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 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
1788 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
804 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

287 
WUUS51 KBUF 211632
SVRBUF
NYC069-117-211730-
/O.NEW.KBUF.SV.W.0017.130521T1632Z-130521T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1232 PM EDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ONTARIO COUNTY IN WESTERN NEW YORK
  SOUTH CENTRAL WAYNE COUNTY IN WESTERN NEW YORK

THIS ALSO INCLUDES THE NEW YORK THRUWAY BETWEEN EXITS 42 AND 43.

* UNTIL 130 PM EDT

* AT 1228 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 7 MILES
  WEST OF CLIFTON SPRINGS...OR 7 MILES NORTH OF CANANDAIGUA...AND
  MOVING EAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  CLIFTON SPRINGS...
  NEWARK...
  LYONS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND 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 4295 7730 4302 7731 4314 7690 4301 7688
      4301 7696 4296 7695 4291 7696
TIME...MOT...LOC 1632Z 256DEG 16KT 4299 7725

$$

ZAFF
2 follow-up statements
492 
WWUS51 KBUF 211654
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1254 PM EDT TUE MAY 21 2013

NYC069-117-211730-
/O.CON.KBUF.SV.W.0017.000000T0000Z-130521T1730Z/
ONTARIO NY-WAYNE NY-
1254 PM EDT TUE MAY 21 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR SOUTH CENTRAL WAYNE AND NORTHEASTERN ONTARIO COUNTIES...

AT 1251 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 PHELPS...OR 10 MILES NORTHWEST OF GENEVA...MOVING EAST
AT 25 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  PHELPS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND 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 4294 7716 4302 7716 4305 7690 4301 7688
      4301 7696 4296 7695 4291 7696
TIME...MOT...LOC 1653Z 268DEG 20KT 4298 7707

$$

ZAFF
142 
WWUS51 KBUF 211713
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
113 PM EDT TUE MAY 21 2013

NYC069-117-211723-
/O.CAN.KBUF.SV.W.0017.000000T0000Z-130521T1730Z/
ONTARIO NY-WAYNE NY-
113 PM EDT TUE MAY 21 2013

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WAYNE AND
NORTHEASTERN ONTARIO COUNTIES IS CANCELLED...

AT 113 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 4294 7716 4302 7716 4305 7690 4301 7688
      4301 7696 4296 7695 4291 7696
TIME...MOT...LOC 1713Z 268DEG 20KT 4298 7692

$$

ZAFF

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 10:53 PM EDTSpecial Marine WarningBUF52 min
May 20, 11:02 PM EDTSpecial Weather StatementBUFNiagara43 min
May 21, 12:39 AM EDTSpecial Marine WarningBUF51 min
May 21, 12:50 AM EDTSpecial Marine WarningBUF55 min
May 21, 1:01 AM EDTSpecial Weather StatementBUFOswego59 min
May 21, 1:27 AM EDTSevere Thunderstorm WarningBUFJefferson, Lewis48 min
May 21, 1:40 AM EDTSpecial Marine WarningBUF50 min
May 21, 1:49 AM EDTSevere Thunderstorm WarningBUFJefferson, Lewis41 min
May 21, 1:59 AM EDTSpecial Weather StatementBUFLewis61 min
May 21, 2:13 AM EDTSevere Thunderstorm WarningBUFLewis32 min
May 21, 12:34 PM EDTSevere Thunderstorm WarningBUFOntario26 min
May 21, 3:02 PM EDTSevere Thunderstorm WarningBUFCayuga, Wayne58 min
May 21, 3:36 PM EDTSevere Thunderstorm WarningBUFWayne54 min
May 21, 3:57 PM EDTSpecial Weather StatementBUFWyoming33 min
May 21, 3:58 PM EDTSpecial Marine WarningBUF62 min
May 21, 3:58 PM EDTSevere Thunderstorm WarningBUFMonroe47 min
May 21, 4:11 PM EDTSevere Thunderstorm WarningBUFLivingston, Wyoming49 min
May 21, 4:47 PM EDTSpecial Weather StatementBUFOntario28 min
May 21, 4:58 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario47 min
May 21, 5:05 PM EDTSpecial Marine WarningBUF85 min
May 21, 5:14 PM EDTSpecial Marine WarningBUF61 min
May 21, 5:22 PM EDTSpecial Marine WarningBUF83 min
May 21, 5:34 PM EDTSevere Thunderstorm WarningBUFJefferson56 min
May 21, 5:45 PM EDTSevere Thunderstorm WarningBUFOntario15 min
May 21, 5:48 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego57 min
May 21, 7:14 PM EDTSpecial Weather StatementBUFLewis31 min
May 21, 7:40 PM EDTSpecial Marine WarningBUF35 min

Nearby

Severe Thunderstorm Warnings in New York, 2013Every severe thunderstorm warning in 2013

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.