Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 96, NWS Buffalo, NY

September 28, 2009Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 28, 2009, 10:37 AM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 68 min. 4 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 28, 2009, 10:37 AM EDT (14:37 UTC)
Expired: Sep 28, 2009, 11:45 AM EDT
In force: 68 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 64 km from the middle of the area, began a volume at 14:29 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
Sep 28, 11:04 AM EDT	TSTM WND DMG	4 Sw Angola, NY	TREE DOWN ON LONG BEACH ROAD
Sep 28, 11:24 AM EDT	TSTM WND GST 59	Buffalo, NY	59 MPH WIND GUST AT BUFFALO COAST GUARD
Sep 28, 11:31 AM EDT	TSTM WND DMG	3 N Buffalo, NY	TREES AND WIRES DOWN OXFORD AVE
Sep 28, 11:33 AM EDT	TSTM WND DMG	4 Ne Buffalo, NY	TREE AND DEBRIS ON ROUTE 33

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 2.6 hours before the alert went out and 64 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 281437
SVRBUF
NYC009-013-029-281545-
/O.NEW.KBUF.SV.W.0096.090928T1437Z-090928T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1037 AM EDT MON SEP 28 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK
  CHAUTAUQUA COUNTY IN WESTERN NEW YORK
  ERIE COUNTY IN WESTERN NEW YORK

* UNTIL 1145 AM EDT

* AT 1032 AM 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 15 MILES NORTHWEST OF ANGOLA ON THE LAKE TO 8 MILES           
  NORTHWEST OF FINDLEY LAKE...AND MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WESTFIELD BY 1045 AM EDT...
  DUNKIRK...CHAUTAUQUA INSTITUTE AND MAYVILLE BY 1050 AM EDT...
  LAKEWOOD...JAMESTOWN WEST AND FREDONIA BY 1055 AM EDT...
  SILVER CREEK...LAKE ERIE BEACH AND JAMESTOWN BY 1100 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. 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 4227 7977 4240 7949 4250 7936 4257 7916
      4271 7904 4276 7891 4279 7887 4296 7891
      4294 7851 4199 7933 4200 7977
TIME...MOT...LOC 1437Z 248DEG 45KT 4286 7913 4225 7971

$$

TMA

2 follow-up statements

000 
WWUS51 KBUF 281519
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1119 AM EDT MON SEP 28 2009

NYC009-013-029-281545-
/O.CON.KBUF.SV.W.0096.000000T0000Z-090928T1545Z/
CHAUTAUQUA NY-CATTARAUGUS NY-ERIE NY-
1119 AM EDT MON SEP 28 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT
FOR ERIE...NORTHWESTERN CATTARAUGUS AND CHAUTAUQUA COUNTIES...

AT 1117 AM 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 CHEEKTOWAGA TO EDEN TO BEMUS POINT...MOVING EAST AT 
40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GERRY AND COLLINS AND PERRYSBURG BY 1125 AM EDT...
  SOUTH DAYTON AND ELMA AND GOWANDA BY 1130 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. 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 4227 7977 4240 7949 4250 7936 4257 7916
      4271 7904 4276 7891 4279 7887 4296 7891
      4294 7851 4199 7933 4200 7977
TIME...MOT...LOC 1519Z 264DEG 35KT 4294 7873 4266 7886
          4217 7934

$$

TMA

000 
WWUS51 KBUF 281545
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1145 AM EDT MON SEP 28 2009

NYC009-013-029-281555-
/O.EXP.KBUF.SV.W.0096.000000T0000Z-090928T1545Z/
CHAUTAUQUA NY-CATTARAUGUS NY-ERIE NY-
1145 AM EDT MON SEP 28 2009

...THE SEVERE THUNDERSTORM WARNING FOR ERIE...NORTHWESTERN
CATTARAUGUS AND CHAUTAUQUA COUNTIES HAS EXPIRED...

AT 1145 AM 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.

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

LAT...LON 4227 7977 4240 7949 4250 7936 4257 7916
      4271 7904 4276 7891 4279 7887 4296 7891
      4294 7851 4199 7933 4200 7977
TIME...MOT...LOC 1545Z 264DEG 35KT 4296 7838 4268 7851
          4219 7900

$$

TMA

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, 10:59 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, 1:47 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	58 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.