Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS Buffalo, NY

September 18, 2012Jefferson County, Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 18, 2012, 2:44 PM EDT for Jefferson County, Lewis 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
Sep 18, 2012, 2:44 PM EDT (18:44 UTC)
Expired
Sep 18, 2012, 3:45 PM EDT
In force
61 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Jefferson County, NY, Lewis County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 17 km from the middle of the area, began a volume at 18:44 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

TimeReportWhereRemark
Sep 18, 3:19 PM EDTTSTM WND DMGWatson, NYTREES AND WIRES DOWN
Sep 18, 3:36 PM EDTTSTM WND DMGWatson, NYTREES AND WIRES 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, 6.7 hours before the alert went out and 175 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 2012-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2012-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 251 square meters per square second.1939587897Sfc1 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
2 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
572 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
251 m²/s²
0-3 km storm-relative helicity
226 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.

496 
WUUS51 KBUF 181844
SVRBUF
NYC045-049-075-181945-
/O.NEW.KBUF.SV.W.0086.120918T1844Z-120918T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
244 PM EDT TUE SEP 18 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 345 PM EDT

* AT 238 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM CALCIUM TO REDFIELD...OR ALONG A LINE EXTENDING FROM 4 MILES
  SOUTHWEST OF FORT DRUM TO 16 MILES NORTHWEST OF CAMDEN...AND MOVING
  EAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WEST CARTHAGE...
  HIGHMARKET...
  INDIAN RIVER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THESE STORMS WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&
LAT...LON 4361 7511 4344 7548 4345 7571 4348 7580
      4345 7582 4346 7598 4409 7587 4407 7516
TIME...MOT...LOC 1844Z 272DEG 23KT 4400 7575 4354 7583

$$

TJP
2 follow-up statements
028 
WWUS51 KBUF 181905
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
305 PM EDT TUE SEP 18 2012

NYC045-049-075-181945-
/O.CON.KBUF.SV.W.0086.000000T0000Z-120918T1945Z/
LEWIS NY-JEFFERSON NY-OSWEGO NY-
305 PM EDT TUE SEP 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR EXTREME NORTHEASTERN OSWEGO...EAST CENTRAL JEFFERSON AND LEWIS
COUNTIES...

AT 300 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM CARTHAGE TO OSCEOLA...MOVING EAST AT 25 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  CASTORLAND...
  NATURAL BRIDGE...
  MARTINSBURG...
  CROGHAN...
  INDIAN RIVER...
  LYONS FALLS...
  PORT LEYDEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THESE STORMS MAY OCCUR WITH NO THUNDER OR 
LIGHTNING. THEREFORE...DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE 
TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND 
STAY AWAY FROM WINDOWS.

&&

LAT...LON 4361 7511 4344 7548 4345 7571 4348 7580
      4409 7572 4407 7516
TIME...MOT...LOC 1904Z 272DEG 23KT 4399 7557 4353 7566

$$

TJP
166 
WWUS51 KBUF 181947
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
347 PM EDT TUE SEP 18 2012

NYC045-049-075-181956-
/O.EXP.KBUF.SV.W.0086.000000T0000Z-120918T1945Z/
LEWIS NY-JEFFERSON NY-OSWEGO NY-
347 PM EDT TUE SEP 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN OSWEGO...
EAST CENTRAL JEFFERSON AND LEWIS COUNTIES HAS EXPIRED...

AT 346 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE STRONG 
WINDS THAT PROMPTED THE WARNING HAVE WEAKENED AND WERE NO LONGER 
SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

RADAR INDICATED THAT HEAVY RAIN AND GUSTY WINDS WERE STILL POSSIBLE 
FROM THE LINE OF SHOWERS THAT WILL BE PASSING THROUGH THE FAR 
EASTERN PART OF LEWIS COUNTY. 

LAT...LON 4361 7511 4344 7548 4345 7571 4348 7580
      4409 7572 4407 7516
TIME...MOT...LOC 1905Z 272DEG 23KT 4399 7556 4353 7565

$$

TJP

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 3:57 AM EDTWind AdvisoryBUFLewis12 hr
Sep 18, 12:50 PM EDTSpecial Weather StatementBUFOswego55 min
Sep 18, 1:47 PM EDTSpecial Weather StatementBUFOswego58 min
Sep 18, 6:35 PM EDTSpecial Weather StatementBUFJefferson, Oswego55 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.