Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS Buffalo, NY

August 9, 2012Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 9, 2012, 4:29 PM EDT for Lewis County, New York. It was in force for 31 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 9, 2012, 4:29 PM EDT (20:29 UTC)
Expired
Aug 9, 2012, 5:00 PM EDT
In force
31 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

County Lewis County, NY

The radar

The Ft Drum radar (KTYX), 42 km from the middle of the area, began a volume at 20:31 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 152 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, Albany, NY at 12:00Z on 2012-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 780 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2012-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939Sfc1 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
780 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
965 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

865 
WUUS51 KBUF 092029
SVRBUF
NYC049-092100-
/O.NEW.KBUF.SV.W.0068.120809T2029Z-120809T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
429 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL LEWIS COUNTY IN CENTRAL NEW YORK

* UNTIL 500 PM EDT

* AT 427 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
  EAST OF PORT LEYDEN...OR 9 MILES NORTHEAST OF BOONVILLE...AND
  MOVING NORTHEAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  RURAL SOUTHEASTERN LEWIS COUNTY
  RURAL EASTERN LEWIS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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 4360 7513 4353 7528 4353 7530 4363 7538
      4374 7512 4374 7511 4362 7510
TIME...MOT...LOC 2028Z 242DEG 18KT 4359 7521

$$

TJP
2 follow-up statements
195 
WWUS51 KBUF 092044
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
444 PM EDT THU AUG 9 2012

NYC049-092100-
/O.CON.KBUF.SV.W.0068.000000T0000Z-120809T2100Z/
LEWIS NY-
444 PM EDT THU AUG 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR EAST CENTRAL LEWIS COUNTY...

AT 440 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 OVER EXTREME SOUTHEASTERN
LEWIS COUNTY...OR 11 MILES NORTHEAST OF BOONVILLE...MOVING NORTHEAST
AT 20 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  RURAL LEWIS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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 4356 7523 4365 7529 4372 7511 4362 7510
      4360 7513
TIME...MOT...LOC 2043Z 242DEG 18KT 4360 7515

$$

TJP
885 
WWUS51 KBUF 092057
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
457 PM EDT THU AUG 9 2012

NYC049-092107-
/O.EXP.KBUF.SV.W.0068.000000T0000Z-120809T2100Z/
LEWIS NY-
457 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LEWIS COUNTY WILL
EXPIRE AT 500 PM EDT...

AT 457 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 4356 7523 4365 7529 4372 7511 4362 7510
      4360 7513
TIME...MOT...LOC 2057Z 242DEG 18KT 4363 7506

$$

TJP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 3:31 PM EDTSpecial Marine WarningBUF44 min
Aug 9, 3:59 PM EDTSpecial Weather StatementBUFLewis61 min
Aug 9, 6:56 PM EDTSpecial Weather StatementBUFAllegany49 min
Aug 9, 7:07 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus53 min
Aug 9, 7:20 PM EDTFlash Flood WarningBUFAllegany, Cattaraugus3 hr

Nearby

Severe Thunderstorm Warnings in New York, 2012Every 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.