Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 93, NWS Buffalo, NY

August 17, 2007Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 17, 2007, 6:33 PM EDT for Livingston County, Ontario County, New York. It was in force for 43 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
Aug 17, 2007, 6:33 PM EDT (22:33 UTC)
Expired
Aug 17, 2007, 7:16 PM EDT
In force
43 min
Issued by
NWS Buffalo, NY
Area
Counties, with a storm outline in the text

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 97 km from the middle of the area, began a volume at 22:34 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 nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.6 hours before the alert went out and 94 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2007-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2007-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2474 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
162 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 172233
SVRBUF
NYC051-069-172315-
/O.NEW.KBUF.SV.W.0093.070817T2233Z-070817T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
633 PM EDT FRI AUG 17 2007

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 715 PM EDT

* AT 630 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM HONEOYE TO 5 MILES NORTHWEST OF
  CONESUS...OR ALONG A LINE EXTENDING FROM 12 MILES SOUTHWEST OF
  CANANDAIGUA TO 4 MILES SOUTHEAST OF GENESEO...AND MOVING EAST AT 40
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CONESUS BY 640 PM EDT...
  NAPLES BY 700 PM EDT...

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 4279 7735 4259 7739 4273 7796 4274 7795
      4282 7746
TIME...MOT...LOC 2233Z 281DEG 38KT 4278 7744 4274 7774

$$

JJP
2 follow-up statements
000 
WWUS51 KBUF 172305
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
705 PM EDT FRI AUG 17 2007

NYC051-069-172315-
/O.CON.KBUF.SV.W.0093.000000T0000Z-070817T2315Z/
LIVINGSTON NY-ONTARIO NY-
705 PM EDT FRI AUG 17 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR ONTARIO AND LIVINGSTON COUNTIES...

AT 703 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR BRISTOL MOUNTAIN...OR ABOUT 7 MILES WEST OF MIDDLESEX...
MOVING SOUTHEAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NAPLES BY 715 PM EDT...

THIS IS A DANGEROUS STORM. 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 4279 7735 4259 7739 4273 7796 4274 7795
      4282 7746
TIME...MOT...LOC 2305Z 317DEG 9KT 4269 7740

$$

JJP
000 
WWUS51 KBUF 172316
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
715 PM EDT FRI AUG 17 2007

NYC051-069-172325-
/O.CAN.KBUF.SV.W.0093.000000T0000Z-070817T2315Z/
LIVINGSTON NY-ONTARIO NY-
715 PM EDT FRI AUG 17 2007

...THE SEVERE THUNDERSTORM WARNING FOR ONTARIO AND LIVINGSTON
COUNTIES IS CANCELLED...

THE STORMS HAVE MOVED OUT OF THE AREA SO THE WARNING HAS BEEN 
CANCELLED.

LAT...LON 4279 7735 4259 7739 4273 7796 4274 7795
      4282 7746
TIME...MOT...LOC 2315Z 281DEG 38KT 4269 7685 4265 7715

$$

JJP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 5:34 PM EDTSpecial Marine WarningBUF59 min
Aug 17, 6:21 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus54 min

Nearby

Severe Thunderstorm Warnings in New York, 2007Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.