Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 1, NWS Buffalo, NY

February 11, 2009Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Feb 11, 2009, 8:53 PM EST for Chautauqua County, New York. It was in force for 36 min. 1 report 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: Feb 11, 2009, 8:53 PM EST (01:53 UTC)
Expired: Feb 11, 2009, 9:29 PM EST
In force: 36 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 105 km from the middle of the area, began a volume at 01:55 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
Feb 11, 9:20 PM EST	TSTM WND DMG	Westfield, NY	COUPLE OF TREES DOWN, POWER OUTAGES.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 11, 8:19 PM EST	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.9 hours before the alert went out and 105 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: 1017 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 228 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 120153
SVRBUF
NYC013-120245-
/O.NEW.KBUF.SV.W.0001.090212T0153Z-090212T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
853 PM EST WED FEB 11 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 945 PM EST

* AT 850 PM EST...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 FINDLEY LAKE TO 12 MILES SOUTHWEST OF LAKEWOOD...AND MOVING
  NORTHEAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CHAUTAUQUA INSTITUTE AND LAKEWOOD BY 900 PM EST...
  WESTFIELD...MAYVILLE AND JAMESTOWN WEST BY 905 PM EST...
  FALCONER BY 910 PM EST...
  FREDONIA BY 925 PM EST...
  SILVER CREEK BY 940 PM EST...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EST
THURSDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4200 7959 4216 7976 4233 7965 4257 7916
      4199 7907
TIME...MOT...LOC 0153Z 226DEG 39KT 4219 7964 4206 7944

$$

RSH

2 follow-up statements

000 
WWUS51 KBUF 120217
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
917 PM EST WED FEB 11 2009

NYC013-120245-
/O.CON.KBUF.SV.W.0001.000000T0000Z-090212T0245Z/
CHAUTAUQUA NY-
916 PM EST WED FEB 11 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EST
FOR CHAUTAUQUA COUNTY...

AT 915 PM EST...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 MAYVILLE TO GERRY...MOVING NORTHEAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FREDONIA AND ARKWRIGHT BY 925 PM EST...
  FORESTVILLE BY 935 PM EST...
  SILVER CREEK BY 940 PM EST...

WIND DAMAGE WITH THESE STORMS MAY OCCUR WITHOUT THE PRESENCE OF 
THUNDER AND LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE 
TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND 
STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EST
THURSDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4201 7938 4221 7953 4233 7965 4257 7916
      4199 7907
TIME...MOT...LOC 0216Z 226DEG 39KT 4236 7940 4223 7920

$$

RSH

000 
WWUS51 KBUF 120229
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
929 PM EST WED FEB 11 2009

NYC013-120239-
/O.CAN.KBUF.SV.W.0001.000000T0000Z-090212T0245Z/
CHAUTAUQUA NY-
929 PM EST WED FEB 11 2009

...THE SEVERE THUNDERSTORM WARNING FOR CHAUTAUQUA COUNTY IS
CANCELLED...

AT 929 PM EST 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 CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EST
THURSDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4201 7938 4221 7953 4233 7965 4257 7916
      4199 7907
TIME...MOT...LOC 0229Z 226DEG 39KT 4246 7926 4233 7906

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 11, 7:23 PM EST	Areal Flood Warning	BUF	Chautauqua, Erie	18 hr
Feb 12, 1:23 AM EST	River Flood Warning	BUF	Erie, Genesee, Niagara, Wyoming	39 hr
Feb 12, 9:03 AM EST	River Flood Warning	BUF	Erie, Genesee	29 hr
Feb 12, 9:03 AM EST	River Flood Warning	BUF	Erie, Genesee, Niagara	4 days
Feb 12, 11:39 AM EST	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more	6 hr
Feb 12, 2:38 PM EST	River Flood Warning	BUF	Genesee, Monroe	40 hr
Feb 12, 2:38 PM EST	River Flood Warning	BUF	Genesee, Monroe	55 hr
Feb 12, 3:11 PM EST	Small Craft Advisory	BUF		19 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.