Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 108, NWS Buffalo, NY

September 11, 2007Livingston County, Monroe County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 11, 2007, 9:47 PM EDT for Livingston County, Monroe County, New York. It was in force for 58 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, 9:47 PM EDT (01:47 UTC)
Expired: Sep 11, 2007, 10:45 PM EDT
In force: 58 min
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

Counties Livingston County, NY, Monroe County, NY

The radar

The Buffalo radar (KBUF), 88 km from the middle of the area, began a volume at 01:49 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, 10:15 PM EDT	TSTM WND DMG	Geneseo, NY	TREES AND POWER LINES DOWN IN NUMEROUS LOCATIONS ACROSS THE NORTHERN HALF OF THE COUNTY

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, 1.8 hours before the alert went out and 85 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 120148
SVRBUF
NYC051-055-120245-
/O.NEW.KBUF.SV.W.0108.070912T0147Z-070912T0245Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LIVINGSTON COUNTY IN WESTERN NEW YORK
  MONROE COUNTY IN WESTERN NEW YORK

* UNTIL 1045 PM EDT

* AT 945 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 NEAR BATAVIA TO 15 MILES SOUTHEAST OF EAST AURORA...AND
  MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CALEDONIA AND CHURCHVILLE BY 955 PM EDT...
  SCOTTSVILLE AND YORK BY 1000 PM EDT...
  MOUNT MORRIS...GENESEO AND AVON BY 1005 PM EDT...
  HENRIETTA AND BRIGHTON BY 1010 PM EDT...
  EAST ROCHESTER BY 1015 PM EDT...

THE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE AND PEA SIZED 
HAIL. SOME AREAS MAY ALSO RECEIVE UP TO THREE QUARTERS OF AN INCH OF 
RAIN IN ONE HALF HOURS TIME.

LAT...LON 4315 7743 4292 7763 4260 7764 4255 7795
      4316 7788
TIME...MOT...LOC 0147Z 270DEG 45KT 4295 7801 4256 7829

$$

RSH

1 follow-up statement

000 
WWUS51 KBUF 120240
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1040 PM EDT TUE SEP 11 2007

NYC051-055-120250-
/O.EXP.KBUF.SV.W.0108.000000T0000Z-070912T0245Z/
LIVINGSTON NY-MONROE NY-
1040 PM EDT TUE SEP 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR MONROE AND LIVINGSTON COUNTIES
EXPIRES AT 1045 PM EDT...

AT 1040 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.

PLEASE REPORT SEVERE WEATHER AND WIND DAMAGE TO LOCAL LAW 
ENFORCEMENT FOR RELAY TO THE NATIONAL WEATHER SERVICE IN BUFFALO.

LAT...LON 4315 7743 4292 7763 4260 7764 4255 7795
      4316 7788
TIME...MOT...LOC 0240Z 270DEG 45KT 4295 7711 4256 7739

$$

HITCHCOCK

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, 9:19 PM EDT	Severe Thunderstorm Warning	BUF	Genesee	41 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, 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.