Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 86, NWS Buffalo, NY

August 3, 2007Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 3, 2007, 4:22 PM EDT for Niagara County, New York. It was in force for 68 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 3, 2007, 4:22 PM EDT (20:22 UTC)
Expired
Aug 3, 2007, 5:30 PM EDT
In force
68 min
Issued by
NWS Buffalo, NY
Area
Counties, with a storm outline in the text

County Niagara County, NY

The radar

The Buffalo radar (KBUF), 25 km from the middle of the area, began a volume at 20:24 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 3, 4:33 PM EDTHAIL 0.754 W Sanborn, NY
Aug 3, 4:40 PM EDTHAIL 0.885 E Niagara Falls, NY
Aug 3, 4:58 PM EDTHAIL 0.88Niagara Falls, NY

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, 8.4 hours before the alert went out and 29 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 2007-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1777 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 2007-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.193958Sfc1 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
1777 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1089 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 032025
SVRBUF
NYC063-032130-
/O.NEW.KBUF.SV.W.0086.070803T2022Z-070803T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
422 PM EDT FRI AUG 3 2007

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 530 PM EDT

* AT 420 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 NEAR
  NIAGARA FALLS...AND MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NIAGARA FALLS BY 425 PM EDT...
  LOCKPORT BY 515 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4317 7906 4308 7905 4308 7861 4324 7866

$$

HITCHCOCK
2 follow-up statements
000 
WWUS51 KBUF 032045
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
443 PM EDT FRI AUG 3 2007

NYC063-032130-
/O.CON.KBUF.SV.W.0086.000000T0000Z-070803T2130Z/
NIAGARA NY-
443 PM EDT FRI AUG 3 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NIAGARA COUNTY...

AT 439 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR NIAGARA FALLS...MOVING EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NIAGARA FALLS THROUGH 500 PM EDT...
  SANBORN BY 455 PM EDT...
  PENDLETON BY 510 PM EDT...
  RAPIDS BY 530 PM EDT...

THOSE OUTDOORS IN NIAGARA FALLS...INCLUDING NIAGARA FALLS STATE PARK 
SHOULD SEEK SHELTER IMMEDIATELY AND REMAIN INDOORS UNTIL THIS STORM 
PASSES. SEVERAL REPORTS OF PENNY TO NICKEL SIZED HAIL HAVE BEEN 
RECEIVED FROM THIS STORM.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4314 7902 4308 7905 4308 7861 4324 7866

$$

HITCHCOCK
000 
WWUS51 KBUF 032125
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
525 PM EDT FRI AUG 3 2007

NYC063-032135-
/O.EXP.KBUF.SV.W.0086.000000T0000Z-070803T2130Z/
NIAGARA NY-
525 PM EDT FRI AUG 3 2007

...THE SEVERE THUNDERSTORM WARNING FOR NIAGARA COUNTY EXPIRES AT 530
PM EDT...

AT 525 PM EDT 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 ALLOWED TO EXPIRE.

THIS STORM WILL CONTINUE TO PRODUCE VERY HEAVY RAINFALL ALONG WITH 
DANGEROUS CLOUD TO GROUND LIGHTNING.

LAT...LON 4314 7902 4308 7905 4308 7861 4324 7866

$$

HITCHCOCK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:28 PM EDTSevere Thunderstorm WarningBUFLewis49 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.