Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 106, NWS Buffalo, NY

September 11, 2007Genesee County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 11, 2007, 9:19 PM EDT for Genesee County, New York. It was in force for 41 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: Sep 11, 2007, 9:19 PM EDT (01:19 UTC)
Expired: Sep 11, 2007, 10:00 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

County Genesee County, NY

The radar

The Buffalo radar (KBUF), 47 km from the middle of the area, began a volume at 01:18 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 11, 9:46 PM EDT	TSTM WND DMG	Batavia, NY	LIMB DOWN

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 00:00Z, 1.3 hours before the alert went out and 45 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: 215 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1068 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 50 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.

000 
WUUS51 KBUF 120119
SVRBUF
NYC037-120200-
/O.NEW.KBUF.SV.W.0106.070912T0119Z-070912T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
919 PM EDT TUE SEP 11 2007

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 1000 PM EDT

* AT 910 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 OAKFIELD TO 30 MILES SOUTHWEST OF
  BATAVIA...OR ALONG A LINE EXTENDING FROM 5 MILES NORTHEAST OF
  LOCKPORT TO 5 MILES SOUTH OF EAST AURORA...AND MOVING EAST AT 50
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  OAKFIELD BY 925 PM EDT...
  BATAVIA BY 930 PM EDT...
  BYRON BY 935 PM EDT...
  LE ROY BY 940 PM EDT...

THESE STORMS HAVE A HISTORY OF PRODUCING MEASURED WIND GUSTS TO 60 
MPH ALONG WITH PEA SIZED HAIL AND DOWNPOURS OF A HALF INCH IN UNDER 
AN HOURS TIME.

LAT...LON 4310 7798 4289 7797 4291 7845 4310 7845
TIME...MOT...LOC 0119Z 263DEG 59KT 4326 7842 4271 7842

$$

RSH

2 follow-up statements

000 
WWUS51 KBUF 120144
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
943 PM EDT TUE SEP 11 2007

NYC037-120200-
/O.CON.KBUF.SV.W.0106.000000T0000Z-070912T0200Z/
GENESEE NY-
943 PM EDT TUE SEP 11 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR GENESEE COUNTY...

AT 940 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 ELBA TO 8 MILES SOUTHWEST OF BETHANY CENTER AND 
MOVING EAST AT 60 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  LE ROY AND PAVILLION BY 950 PM EDT...

THESE ARE DANGEROUS STORMS THAT HAVE A HISTORY OF PRODUCING 
WIDESPREAD WIND DAMAGE ACROSS THE BUFFALO METRO AREA. IF YOU ARE IN 
THE PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...AND DEADLY CLOUD 
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4289 7797 4289 7802 4290 7803 4290 7825
      4291 7826 4291 7836 4307 7829 4310 7798
TIME...MOT...LOC 0143Z 263DEG 54KT 4305 7808 4284 7821

$$

HITCHCOCK

000 
WWUS51 KBUF 120158
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
958 PM EDT TUE SEP 11 2007

NYC037-120208-
/O.EXP.KBUF.SV.W.0106.000000T0000Z-070912T0200Z/
GENESEE NY-
958 PM EDT TUE SEP 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR GENESEE COUNTY EXPIRES AT 1000
PM EDT...

AT 958 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.

WHILE THE SEVERE THUNDERSTORM WARNING WILL EXPIRE...THERE WILL STILL 
BE SOME HEAVY RAIN OVER THE EASTERN HALF OF THE COUNTY THROUGH 10:30 
PM EDT.

LAT...LON 4289 7797 4289 7802 4290 7803 4290 7825
      4291 7826 4291 7836 4307 7829 4310 7798
TIME...MOT...LOC 0158Z 263DEG 54KT 4308 7777 4287 7791

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 8:25 PM EDT	Special Marine Warning	BUF		103 min
Sep 11, 8:31 PM EDT	Special Marine Warning	BUF		71 min
Sep 11, 8:39 PM EDT	Special Marine Warning	BUF		2 hr
Sep 11, 8:56 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	64 min
Sep 11, 9:26 PM EDT	Severe Thunderstorm Warning	BUF	Wyoming	47 min
Sep 11, 9:30 PM EDT	Special Marine Warning	BUF		90 min
Sep 11, 9:47 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe	58 min
Sep 11, 10:24 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	49 min
Sep 11, 10:33 PM EDT	Special Marine Warning	BUF		87 min
Sep 11, 11:21 PM EDT	Special Marine Warning	BUF		46 min
Sep 11, 11:26 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	53 min
Sep 11, 11:55 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	54 min

Nearby

Severe Thunderstorm Warnings in New York, 2007 Every severe thunderstorm warning in 2007

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.