Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 91, NWS Buffalo, NY

August 16, 2007Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 16, 2007, 4:55 PM EDT for Ontario County, New York. It was in force for 54 min. 3 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
Aug 16, 2007, 4:55 PM EDT (20:55 UTC)
Expired
Aug 16, 2007, 5:49 PM EDT
In force
54 min
Issued by
NWS Buffalo, NY
Area
Counties, with a storm outline in the text

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 111 km from the middle of the area, began a volume at 20:57 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

TimeReportWhereRemark
Aug 16, 5:15 PM EDTTSTM WND DMGBristol, NYNUMEROUS TREES AND LINES DOWN
Aug 16, 5:20 PM EDTTSTM WND DMG2 S Canandaigua, NYNUMEROUS TREES AND WIRES DOWN
Aug 16, 5:30 PM EDTTSTM WND DMGGorham, NYNUMEROUS TREES AND LINES 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 12:00Z, 8.9 hours before the alert went out and 108 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 2007-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 571 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2007-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 square meters per square second.1939587897117Sfc1 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
571 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
893 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KBUF 162055
SVRBUF
NYC069-162200-
/O.NEW.KBUF.SV.W.0091.070816T2055Z-070816T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
455 PM EDT THU AUG 16 2007

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 453 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  NORTHWEST OF BRISTOL...OR ABOUT 13 MILES NORTHEAST OF GENESEO...AND
  MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRISTOL BY 510 PM EDT...
  CANANDAIGUA BY 525 PM EDT...
  GENEVA BY 550 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 4277 7698 4281 7759 4286 7758 4288 7755
      4289 7757 4294 7756 4294 7749 4303 7749
      4301 7697
TIME...MOT...LOC 2055Z 277DEG 28KT 4291 7758

$$

HITCHCOCK
2 follow-up statements
000 
WWUS51 KBUF 162123
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
523 PM EDT THU AUG 16 2007

NYC069-162200-
/O.CON.KBUF.SV.W.0091.000000T0000Z-070816T2200Z/
ONTARIO NY-
523 PM EDT THU AUG 16 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR ONTARIO COUNTY...

AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
LOCATED NEAR CANANDAIGUA...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GORHAM BY 540 PM EDT...
  GENEVA BY 550 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 4277 7698 4280 7738 4294 7733 4295 7697
TIME...MOT...LOC 2123Z 277DEG 28KT 4288 7729

$$

HITCHCOCK
000 
WWUS51 KBUF 162149
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
549 PM EDT THU AUG 16 2007

NYC069-162159-
/O.CAN.KBUF.SV.W.0091.000000T0000Z-070816T2200Z/
ONTARIO NY-
549 PM EDT THU AUG 16 2007

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

AT 549 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 CANCELLED.

THERE HAVE BEEN NUMEROUS REPORTS OF TREES AND POWERLINES DOWN FROM 
THIS STORM ACROSS THE SOUTHERN HALF OF ONTARIO COUNTY FROM BRISTOL 
TO GORHAM.

LAT...LON 4277 7698 4280 7738 4294 7733 4295 7697
TIME...MOT...LOC 2149Z 277DEG 28KT 4285 7702

$$

HITCHCOCK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 2:27 PM EDTSpecial Marine WarningBUF63 min
Aug 16, 2:49 PM EDTSpecial Marine WarningBUF41 min
Aug 16, 4:00 PM EDTSevere Thunderstorm WarningBUFGenesee45 min
Aug 16, 4:38 PM EDTSevere Thunderstorm WarningBUFLivingston37 min
Aug 16, 4:47 PM EDTSevere Thunderstorm WarningBUFMonroe28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.