Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 50, NWS Buffalo, NY

July 31, 2012Jefferson County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 31, 2012, 6:29 PM EDT for Jefferson County, Oswego County, New York. It was in force for 61 min. 2 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 31, 2012, 6:29 PM EDT (22:29 UTC)
Expired: Jul 31, 2012, 7:30 PM EDT
In force: 61 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Jefferson County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 35 km from the middle of the area, began a volume at 22:32 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 31, 6:42 PM EDT	TSTM WND DMG	Sandy Creek, NY	TREE DOWN
Jul 31, 6:45 PM EDT	TSTM WND DMG	Ellisburg, NY	TREES DOWN

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.5 hours before the alert went out and 225 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: 43 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 69 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.

537 
WUUS51 KBUF 312229
SVRBUF
NYC045-075-312330-
/O.NEW.KBUF.SV.W.0050.120731T2229Z-120731T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
629 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN JEFFERSON COUNTY IN CENTRAL NEW YORK
  NORTHEASTERN OSWEGO COUNTY IN CENTRAL NEW YORK

* UNTIL 730 PM EDT

* AT 628 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 STONY POINT TO 8 MILES SOUTH OF
  SELKIRK BEACH...AND MOVING EAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  SANDY CREEK...
  HENDERSON HARBOR...
  PULASKI...
  ADAMS CENTER...
  MANNSVILLE...
  WATERTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS THAT HAVE A HISTORY OF PRODUCING WIND 
DAMAGE. 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 4380 7585 4360 7576 4356 7577 4354 7584
      4357 7622 4378 7623 4384 7631 4391 7622
      4387 7621 4390 7614 4395 7616 4398 7622
      4395 7628 4398 7629 4399 7628 4401 7616
      4402 7617 4412 7594
TIME...MOT...LOC 2229Z 270DEG 18KT 4384 7626 4346 7621

$$

HITCHCOCK

2 follow-up statements

877 
WWUS51 KBUF 312252
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
652 PM EDT TUE JUL 31 2012

NYC045-075-312330-
/O.CON.KBUF.SV.W.0050.000000T0000Z-120731T2330Z/
JEFFERSON NY-OSWEGO NY-
652 PM EDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHEASTERN OSWEGO AND SOUTHWESTERN JEFFERSON COUNTIES...

AT 646 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 SACKETS HARBOR TO 7 MILES 
SOUTHEAST OF LACONA...MOVING EAST AT 25 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  BROWNVILLE...
  WATERTOWN...
  MANNSVILLE...
  ADAMS...
  WORTH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS THAT HAVE A HISTORY OF PRODUCING 
WIDESPREAD WIND DAMAGE. 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 4380 7585 4360 7576 4356 7577 4354 7584
      4357 7622 4378 7623 4384 7631 4391 7622
      4387 7621 4390 7614 4395 7616 4398 7622
      4395 7628 4398 7629 4399 7628 4401 7616
      4402 7617 4412 7594
TIME...MOT...LOC 2251Z 263DEG 21KT 4391 7603 4358 7594

$$

HITCHCOCK

304 
WWUS51 KBUF 312326
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
726 PM EDT TUE JUL 31 2012

NYC045-075-312336-
/O.EXP.KBUF.SV.W.0050.000000T0000Z-120731T2330Z/
JEFFERSON NY-OSWEGO NY-
726 PM EDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OSWEGO AND
SOUTHWESTERN JEFFERSON COUNTIES WILL EXPIRE AT 730 PM EDT...

AT 726 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4380 7585 4360 7576 4356 7577 4354 7584
      4357 7622 4378 7623 4384 7631 4391 7622
      4387 7621 4390 7614 4395 7616 4398 7622
      4395 7628 4398 7629 4399 7628 4401 7616
      4402 7617 4412 7594
TIME...MOT...LOC 2326Z 263DEG 21KT 4393 7575 4360 7566

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:28 PM EDT	Severe Thunderstorm Warning	BUF	Livingston	32 min
Jul 31, 4:50 PM EDT	Areal Flood Advisory	BUF	Genesee, Livingston, Monroe, Wyoming	3 hr
Jul 31, 5:05 PM EDT	Special Weather Statement	BUF	Allegany	55 min
Jul 31, 5:13 PM EDT	Special Marine Warning	BUF		2 hr
Jul 31, 5:22 PM EDT	Flash Flood Warning	BUF	Genesee, Livingston, Monroe	3 hr
Jul 31, 5:31 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	59 min
Jul 31, 5:38 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	52 min
Jul 31, 6:03 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	57 min
Jul 31, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	17 min
Jul 31, 6:10 PM EDT	Special Marine Warning	BUF		88 min
Jul 31, 6:48 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	72 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.