Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 31, NWS Buffalo, NY

July 7, 2012Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 7, 2012, 2:01 PM EDT for Allegany County, New York. It was in force for 44 min. 10 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: Jul 7, 2012, 2:01 PM EDT (18:01 UTC)
Expired: Jul 7, 2012, 2:45 PM EDT
In force: 44 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 106 km from the middle of the area, began a volume at 18:02 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
Jul 7, 2:10 PM EDT	HAIL 1	Belmont, NY	2.9 MILES WSW OF BELMONT... RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:10 PM EDT	HAIL 1.75	Belmont, NY	3.7 MILES SSW BELMONT...RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:15 PM EDT	HAIL 1	Belmont, NY	2.9 MILES WSW OF BELMONT... RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:18 PM EDT	HAIL 1	Scio, NY
Jul 7, 2:25 PM EDT	TSTM WND DMG	Wellsville, NY	TREES DOWN IN WELLSVILLE.
Jul 7, 2:25 PM EDT	HAIL 0.75	Wellsville, NY
Jul 7, 2:25 PM EDT	HAIL 1.75	Belmont, NY	3.7 MILES SSW BELMONT...RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:25 PM EDT	HAIL 2	Belmont, NY	3.7 MILES SSW BELMONT...RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:40 PM EDT	HAIL 1.75	Stannards, NY	5 MILES SE STANNARDS...RECIEVED A REPORT FROM NSSL SHAVE.
Jul 7, 2:45 PM EDT	HAIL 1.75	Stannards, NY	5 MILES SE STANNARDS...RECIEVED A REPORT FROM NSSL SHAVE.

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, 6.0 hours before the alert went out and 102 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: 294 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 149 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.

373 
WUUS51 KBUF 071801
SVRBUF
NYC003-071845-
/O.NEW.KBUF.SV.W.0031.120707T1801Z-120707T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
201 PM EDT SAT JUL 7 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ALLEGANY COUNTY IN WESTERN NEW YORK

* UNTIL 245 PM EDT

* AT 158 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 6 MILES
  SOUTHWEST OF BELFAST...OR 15 MILES NORTHWEST OF WELLSVILLE...AND
  MOVING SOUTHEAST AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WELLSVILLE...
  WHITESVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. 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.

&&

LAT...LON 4220 7831 4223 7831 4237 7818 4226 7773
      4200 7774 4199 7775 4199 7790
TIME...MOT...LOC 1801Z 297DEG 38KT 4225 7812

$$

JJR

2 follow-up statements

963 
WWUS51 KBUF 071822
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
222 PM EDT SAT JUL 7 2012

NYC003-071845-
/O.CON.KBUF.SV.W.0031.000000T0000Z-120707T1845Z/
ALLEGANY NY-
222 PM EDT SAT JUL 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR SOUTHERN ALLEGANY COUNTY...

AT 222 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WELLSVILLE...MOVING SOUTHEAST AT 45 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  WHITESVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. 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.

&&

LAT...LON 4220 7831 4223 7831 4237 7818 4226 7773
      4200 7774 4199 7775 4199 7790
TIME...MOT...LOC 1822Z 307DEG 39KT 4209 7787

$$

JJR

632 
WWUS51 KBUF 071845
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
245 PM EDT SAT JUL 7 2012

NYC003-071855-
/O.EXP.KBUF.SV.W.0031.000000T0000Z-120707T1845Z/
ALLEGANY NY-
245 PM EDT SAT JUL 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ALLEGANY COUNTY HAS 
EXPIRED AS OF 245 PM EDT...

AT 245 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE 
SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED 
AREA...THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4220 7831 4223 7831 4237 7818 4226 7773
      4200 7774 4199 7775 4199 7790
TIME...MOT...LOC 1844Z 307DEG 39KT 4194 7762

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:23 AM EDT	Special Weather Statement	BUF	Niagara	52 min
Jul 7, 10:06 AM EDT	Special Weather Statement	BUF	Livingston, Ontario	54 min
Jul 7, 1:41 PM EDT	Special Weather Statement	BUF	Allegany	64 min
Jul 7, 1:58 PM EDT	Special Weather Statement	BUF	Allegany	62 min
Jul 7, 2:00 PM EDT	Special Weather Statement	BUF	Allegany	60 min
Jul 7, 2:05 PM EDT	Special Weather Statement	BUF	Cattaraugus	55 min

Nearby

Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning in 2012

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.