Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 101, NWS Buffalo, NY

September 28, 20094 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 28, 2009, 1:47 PM EDT for 4 counties in New York. It was in force for 58 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: Sep 28, 2009, 1:47 PM EDT (17:47 UTC)
Expired: Sep 28, 2009, 2:45 PM EDT
In force: 58 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cayuga County, NY, Jefferson County, NY, Oswego County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 44 km from the middle of the area, began a volume at 17:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 28, 11:35 AM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.8 hours before the alert went out and 217 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 269 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.

000 
WUUS51 KBUF 281747
SVRBUF
NYC011-045-075-117-281845-
/O.NEW.KBUF.SV.W.0101.090928T1747Z-090928T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
147 PM EDT MON SEP 28 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAYUGA COUNTY IN CENTRAL NEW YORK
  WESTERN JEFFERSON COUNTY IN CENTRAL NEW YORK
  OSWEGO COUNTY IN CENTRAL NEW YORK
  EASTERN WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 245 PM EDT

* AT 143 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 20 MILES NORTHWEST OF NINE MILE POINT TO 18 MILES SOUTHWEST OF
  OSWEGO TO 46 MILES SOUTHWEST OF WEEDSPORT...AND MOVING NORTHEAST   
AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  STONY POINT AND OSWEGO BY 210 PM EDT...
  NINE MILE POINT BY 215 PM EDT...
  SOUTHWICK BEACH AND HENDERSON HARBOR BY 220 PM EDT...
  SELKIRK BEACH AND CATO BY 230 PM EDT...
  FULTON...ADAMS CENTER AND ADAMS BY 235 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT MONDAY
AFTERNOON FOR WESTERN NEW YORK.

&&

LAT...LON 4424 7579 4388 7578 4380 7585 4347 7576
      4316 7587 4326 7620 4320 7622 4322 7648
      4303 7648 4301 7687 4334 7676 4356 7622
      4381 7625 4389 7637 4389 7646 4390 7646
      4387 7620 4399 7607 4396 7629 4399 7629
TIME...MOT...LOC 1746Z 246DEG 39KT 4373 7663 4337 7680
          4278 7735

$$

ZAFF

2 follow-up statements

000 
WWUS51 KBUF 281820
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
220 PM EDT MON SEP 28 2009

NYC011-045-075-117-281845-
/O.CON.KBUF.SV.W.0101.000000T0000Z-090928T1845Z/
WAYNE NY-OSWEGO NY-JEFFERSON NY-CAYUGA NY-
220 PM EDT MON SEP 28 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHWESTERN CAYUGA...WESTERN JEFFERSON...OSWEGO AND EASTERN
WAYNE COUNTIES...

AT 219 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 19 MILES WEST OF WATERTOWN TO OSWEGO TO 
MONTEZUMA...MOVING NORTHEAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SCRIBA BY 225 PM EDT...
  SOUTHWICK BEACH BY 230 PM EDT...
  CHAUMONT BY 235 PM EDT...
  PERCH RIVER BY 240 PM EDT...
  ADAMS CENTER BY 245 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT MONDAY
AFTERNOON FOR WESTERN NEW YORK.

&&

LAT...LON 4424 7579 4388 7578 4388 7584 4380 7585
      4347 7576 4334 7587 4316 7587 4326 7620
      4320 7622 4322 7648 4303 7648 4301 7686
      4334 7676 4356 7622 4381 7625 4390 7642
      4387 7620 4399 7607 4399 7629
TIME...MOT...LOC 1820Z 246DEG 39KT 4394 7627 4353 7643
          4302 7675

$$

ZAFF

000 
WWUS51 KBUF 281847
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
247 PM EDT MON SEP 28 2009

NYC011-045-075-117-281857-
/O.EXP.KBUF.SV.W.0101.000000T0000Z-090928T1845Z/
WAYNE NY-OSWEGO NY-JEFFERSON NY-CAYUGA NY-
247 PM EDT MON SEP 28 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAYUGA...WESTERN
JEFFERSON...OSWEGO AND EASTERN WAYNE COUNTIES HAS EXPIRED...

AT 247 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.

RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WERE
STILL POSSIBLE FROM THE THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT MONDAY
AFTERNOON FOR WESTERN NEW YORK.

LAT...LON 4424 7579 4388 7578 4388 7584 4380 7585
      4347 7576 4334 7587 4316 7587 4326 7620
      4320 7622 4322 7648 4303 7648 4301 7686
      4334 7676 4356 7622 4381 7625 4390 7642
      4387 7620 4399 7607 4399 7629
TIME...MOT...LOC 1820Z 246DEG 39KT 4393 7627 4353 7643
          4302 7675

$$

ZAFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 10:07 AM EDT	Special Marine Warning	BUF		83 min
Sep 28, 10:37 AM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	68 min
Sep 28, 10:59 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	61 min
Sep 28, 11:09 AM EDT	Lakeshore Flood Warning	BUF	Erie	5 hr
Sep 28, 11:26 AM EDT	Special Marine Warning	BUF		64 min
Sep 28, 12:10 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans, Wayne and 1 more	65 min
Sep 28, 12:25 PM EDT	Special Marine Warning	BUF		65 min
Sep 28, 1:08 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	52 min
Sep 28, 1:18 PM EDT	Special Marine Warning	BUF		57 min
Sep 28, 1:23 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee	37 min
Sep 28, 1:58 PM EDT	Special Marine Warning	BUF		2 hr
Sep 28, 2:01 PM EDT	Special Marine Warning	BUF		59 min
Sep 28, 2:08 PM EDT	Special Marine Warning	BUF		37 min
Sep 28, 2:19 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	41 min
Sep 28, 4:06 PM EDT	Lakeshore Flood Statement	BUF	Erie	10 hr
Sep 28, 5:06 PM EDT	Areal Flood Advisory	BUF	Erie, Niagara	3 hr
Sep 28, 5:24 PM EDT	Severe Thunderstorm Warning	BUF	Erie	51 min
Sep 28, 5:57 PM EDT	Severe Thunderstorm Warning	BUF	Erie	33 min
Sep 28, 6:26 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Orleans	49 min
Sep 28, 7:43 PM EDT	Areal Flood Warning	BUF	Cattaraugus, Chautauqua, Erie, Genesee, Wyoming	6 hr

Nearby

Severe Thunderstorm Warnings in New York, 2009 Every severe thunderstorm warning in 2009

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.