Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 76, NWS Buffalo, NY

August 13, 2011Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 13, 2011, 8:35 PM EDT for Ontario County, Wayne County, New York. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 13, 2011, 8:35 PM EDT (00:35 UTC)
Expired
Aug 13, 2011, 9:30 PM EDT
In force
55 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Ontario County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 119 km from the middle of the area, began a volume at 00:34 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.6 hours before the alert went out and 116 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 00:00Z on 2011-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 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 00:00Z on 2011-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
43 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1765 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

728 
WUUS51 KBUF 140035
SVRBUF
NYC069-117-140130-
/O.NEW.KBUF.SV.W.0076.110814T0035Z-110814T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
835 PM EDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ONTARIO COUNTY IN WESTERN NEW YORK
  EXTREME SOUTHWESTERN WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 930 PM EDT

* AT 830 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 8      
  MILES NORTHWEST OF CANANDAIGUA...AND MOVING EAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  CLIFTON SPRINGS...
  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 7743 4303 7739 4304 7737 4304 7699
      4288 7704
TIME...MOT...LOC 0035Z 275DEG 15KT 4298 7733

$$

HITCHCOCK
2 follow-up statements
657 
WWUS51 KBUF 140107
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
907 PM EDT SAT AUG 13 2011

NYC069-117-140130-
/O.CON.KBUF.SV.W.0076.000000T0000Z-110814T0130Z/
ONTARIO NY-WAYNE NY-
907 PM EDT SAT AUG 13 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR EXTREME SOUTH CENTRAL WAYNE AND NORTHEASTERN ONTARIO COUNTIES...

AT 902 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 CLIFTON SPRINGS...OR 7 MILES NORTHEAST OF CANANDAIGUA...
MOVING EAST AT 15 MPH.

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

LAT...LON 4294 7740 4304 7733 4304 7699 4288 7704
TIME...MOT...LOC 0106Z 275DEG 15KT 4296 7715

$$

HITCHCOCK
217 
WWUS51 KBUF 140122
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
922 PM EDT SAT AUG 13 2011

NYC069-117-140132-
/O.EXP.KBUF.SV.W.0076.000000T0000Z-110814T0130Z/
ONTARIO NY-WAYNE NY-
922 PM EDT SAT AUG 13 2011

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTH CENTRAL WAYNE
AND NORTHEASTERN ONTARIO COUNTIES WILL EXPIRE AT 930 PM EDT...

AT 922 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 4294 7740 4304 7733 4304 7699 4288 7704
TIME...MOT...LOC 0122Z 275DEG 15KT 4295 7706

$$

HITCHCOCK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:10 PM EDTSevere Thunderstorm WarningBUFWayne65 min
Aug 13, 9:16 PM EDTSpecial Weather StatementBUFOntario59 min
Aug 13, 9:56 PM EDTFlash Flood WarningBUFOntario3 hr
Aug 13, 11:06 PM EDTAreal Flood AdvisoryBUFLivingston118 min
Aug 13, 11:43 PM EDTFlash Flood WarningBUFLivingston75 min
Aug 14, 9:00 AM EDTSpecial Weather StatementBUFErie60 min
Aug 14, 9:28 AM EDTSpecial Weather StatementBUFErie47 min
Aug 14, 10:12 AM EDTAreal Flood AdvisoryBUFAllegany, Cattaraugus, Erie, Wyoming3 hr
Aug 14, 10:12 AM EDTSpecial Weather StatementBUFErie, Wyoming48 min
Aug 14, 10:59 AM EDTFlash Flood WarningBUFAllegany, Cattaraugus, Livingston, Wyoming3 hr
Aug 14, 11:10 AM EDTSpecial Weather StatementBUFErie50 min
Aug 14, 1:54 PM EDTFlash Flood WarningBUFLivingston, Ontario3 hr
Aug 14, 2:33 PM EDTSpecial Weather StatementBUFMonroe57 min
Aug 14, 2:40 PM EDTFlash Flood WarningBUFLivingston, Monroe, Ontario, Wayne5 hr
Aug 14, 5:53 PM EDTAreal Flood AdvisoryBUFJefferson, Lewis, Oswego3 hr

Nearby

Severe Thunderstorm Warnings in New York, 2011Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.