Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS Buffalo, NY

July 31, 2012Livingston County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 31, 2012, 4:28 PM EDT for Livingston County, New York. It was in force for 32 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: Jul 31, 2012, 4:28 PM EDT (20:28 UTC)
Expired: Jul 31, 2012, 5:00 PM EDT
In force: 32 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Livingston County, NY

The radar

The Buffalo radar (KBUF), 75 km from the middle of the area, began a volume at 20:28 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

Albany, NY (KALY), launched 12:00Z, 8.5 hours before the alert went out and 326 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.

390 
WUUS51 KBUF 312028
SVRBUF
NYC051-312100-
/O.NEW.KBUF.SV.W.0045.120731T2028Z-120731T2100Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK

* UNTIL 500 PM EDT

* AT 424 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 4 MILES
  SOUTHWEST OF YORK...OR 6 MILES WEST OF GENESEO...AND MOVING
  NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  YORK...
  AVON...
  CALEDONIA...

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 4274 7795 4290 7795 4299 7788 4296 7779
      4295 7776 4294 7776 4294 7773 4289 7760
TIME...MOT...LOC 2028Z 236DEG 20KT 4284 7789

$$

HITCHCOCK

2 follow-up statements

857 
WWUS51 KBUF 312038
SVSBUF

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

NYC051-312100-
/O.CON.KBUF.SV.W.0045.000000T0000Z-120731T2100Z/
LIVINGSTON NY-
438 PM EDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHERN LIVINGSTON COUNTY...

AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR YORK...MOVING 
NORTHEAST AT 25 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  YORK...
  AVON...

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 4278 7786 4290 7795 4299 7788 4299 7787
      4295 7776 4294 7776 4294 7772 4289 7760
TIME...MOT...LOC 2038Z 236DEG 20KT 4286 7783

$$

HITCHCOCK

140 
WWUS51 KBUF 312052
SVSBUF

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

NYC051-312102-
/O.EXP.KBUF.SV.W.0045.000000T0000Z-120731T2100Z/
LIVINGSTON NY-
452 PM EDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LIVINGSTON COUNTY
WILL EXPIRE AT 500 PM EDT...

AT 452 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 4278 7786 4290 7795 4299 7788 4299 7787
      4295 7776 4294 7776 4294 7772 4289 7760
TIME...MOT...LOC 2052Z 236DEG 20KT 4290 7774

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 6:29 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.