Alert archive / New York / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 89, NWS Buffalo, NY

September 2, 20135 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 2, 2013, 1:35 PM EDT for 5 counties in New York. It was in force for 55 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: Sep 2, 2013, 1:35 PM EDT (17:35 UTC)
Expired: Sep 2, 2013, 2:30 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 77 km from the middle of the area, began a volume at 17:35 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

Time	Report	Where	Remark
Sep 2, 1:44 PM EDT	HAIL 0.75	Caledonia, NY

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, 5.6 hours before the alert went out and 75 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1277 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

141 
WUUS51 KBUF 021735
SVRBUF
NYC037-051-055-069-121-021830-
/O.NEW.KBUF.SV.W.0089.130902T1735Z-130902T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
135 PM EDT MON SEP 2 2013

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHERN MONROE COUNTY IN WESTERN NEW YORK
  WEST CENTRAL ONTARIO COUNTY IN WESTERN NEW YORK
  NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 230 PM EDT

* AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR PAVILION...OR 8 MILES SOUTHEAST OF
  BATAVIA...AND MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  LE ROY...
  CALEDONIA...
  AVON...
  SCOTTSVILLE...
  HENRIETTA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH...PREPARE 
IMMEDIATELY FOR...LARGE 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 4314 7755 4291 7744 4280 7817 4294 7822
TIME...MOT...LOC 1734Z 253DEG 25KT 4292 7803

$$

REYNOLDS

2 follow-up statements

761 
WWUS51 KBUF 021754
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
154 PM EDT MON SEP 2 2013

NYC121-021803-
/O.CAN.KBUF.SV.W.0089.000000T0000Z-130902T1830Z/
WYOMING NY-
154 PM EDT MON SEP 2 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING COUNTY IS
CANCELLED...

LAT...LON 4286 7796 4287 7799 4297 7803 4314 7755
      4297 7746 4291 7744 4283 7795
TIME...MOT...LOC 1753Z 253DEG 25KT 4294 7785

$$

NYC037-051-055-069-021830-
/O.CON.KBUF.SV.W.0089.000000T0000Z-130902T1830Z/
GENESEE NY-LIVINGSTON NY-ONTARIO NY-MONROE NY-
154 PM EDT MON SEP 2 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTHERN MONROE...WEST CENTRAL ONTARIO...NORTHERN LIVINGSTON AND
SOUTHEASTERN GENESEE COUNTIES...

AT 149 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR CALEDONIA...OR 10 MILES NORTH OF
GENESEO...MOVING EAST AT 30 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  AVON...
  INDUSTRY...
  RUSH...
  HONEOYE FALLS...
  MENDON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH...PREPARE 
IMMEDIATELY FOR...LARGE 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 4286 7796 4287 7799 4297 7803 4314 7755
      4297 7746 4291 7744 4283 7795
TIME...MOT...LOC 1753Z 253DEG 25KT 4294 7785

$$

REYNOLDS

254 
WWUS51 KBUF 021815
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
215 PM EDT MON SEP 2 2013

NYC037-051-055-069-021825-
/O.CAN.KBUF.SV.W.0089.000000T0000Z-130902T1830Z/
GENESEE NY-LIVINGSTON NY-ONTARIO NY-MONROE NY-
215 PM EDT MON SEP 2 2013

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MONROE...WEST
CENTRAL ONTARIO...NORTHERN LIVINGSTON AND SOUTHEASTERN GENESEE
COUNTIES IS CANCELLED...

AT 215 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 4286 7796 4287 7799 4297 7803 4314 7755
      4297 7746 4291 7744 4283 7795
TIME...MOT...LOC 1815Z 253DEG 25KT 4296 7764

$$

REYNOLDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 8:03 PM EDT	Special Weather Statement	BUF	Allegany	57 min
Sep 1, 10:40 PM EDT	Special Weather Statement	BUF	Wayne	65 min
Sep 1, 11:43 PM EDT	Special Weather Statement	BUF	Oswego	77 min
Sep 2, 12:20 AM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	55 min
Sep 2, 11:06 AM EDT	Special Marine Warning	BUF		54 min
Sep 2, 11:31 AM EDT	Special Marine Warning	BUF		44 min
Sep 2, 11:52 AM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	23 min
Sep 2, 12:13 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	32 min
Sep 2, 12:39 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	36 min
Sep 2, 12:51 PM EDT	Special Weather Statement	BUF	Cayuga	39 min
Sep 2, 1:11 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	34 min
Sep 2, 1:28 PM EDT	Special Weather Statement	BUF	Genesee	62 min
Sep 2, 2:01 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga	29 min
Sep 2, 2:14 PM EDT	Special Weather Statement	BUF	Cattaraugus	61 min
Sep 2, 2:37 PM EDT	Special Marine Warning	BUF		38 min
Sep 2, 2:46 PM EDT	Special Weather Statement	BUF	Cayuga	29 min
Sep 2, 3:20 PM EDT	Special Marine Warning	BUF		85 min
Sep 2, 3:31 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	59 min
Sep 2, 3:45 PM EDT	Special Marine Warning	BUF		2 hr
Sep 2, 3:59 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	61 min
Sep 2, 4:15 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	60 min
Sep 2, 4:25 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	65 min
Sep 2, 4:31 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	59 min
Sep 2, 4:32 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	43 min
Sep 2, 4:36 PM EDT	Flash Flood Warning	BUF	Cayuga, Oswego	3 hr
Sep 2, 4:39 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	51 min
Sep 2, 4:57 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	33 min
Sep 2, 4:59 PM EDT	Special Marine Warning	BUF		61 min
Sep 2, 5:24 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	36 min
Sep 2, 5:35 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	25 min
Sep 2, 5:36 PM EDT	Areal Flood Advisory	BUF	Lewis	3 hr
Sep 2, 6:24 PM EDT	Small Craft Advisory	BUF		61 hr

Nearby

Severe Thunderstorm Warnings in New York, 2013 Every 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.