Alert archive / New York / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 75, NWS Buffalo, NY

September 21, 2000Cattaraugus County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 21, 2000, 12:05 AM EDT for Cattaraugus County, New York. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Sep 21, 2000, 12:05 AM EDT (04:05 UTC)
Expired
Sep 21, 2000, 1:00 AM EDT
In force
55 min
Issued by
NWS Buffalo, NY
Area
Whole counties

County Cattaraugus County, NY

What was reported inside it

TimeReportWhereRemark
Sep 21, 12:25 AM EDTThunderstorm WindRandolph, NY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 20, 7:45 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 4.1 hours before the alert went out and 236 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, Pittsburgh, PA at 00:00Z on 2000-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 647 joules per kilogram.LCLLFCEL10008507005003002001001 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, Pittsburgh, PA at 00:00Z on 2000-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.19395878Sfc1 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
647 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1226 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
351 m²/s²
Significant tornado parameter
1.1
Supercell composite
11.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 210408
SVRBUF
NYC009-210500-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1205 AM EDT THU SEP 21 2000

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 100 AM EDT.

* AT MIDNIGHT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A   
  LINE OF STRONG TO SEVERE THUNDERSTORMS OVER EASTERN CHAUTAUQUA     
  COUNTY...MOVING EAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL CROSS THE ENTIRE COUNTY FROM WEST TO     
  EAST BY 100 AM EDT. THE STORMS WILL BE NEAR...

  ELLICOTTVILLE AND SALAMANCA BY 1220 AM EDT.
  DELEVAN AND OLEAN BY 1240 AM EDT.

THESE STORMS HAVE A HISTORY OF WIND DAMAGE IN NORTHWEST PENNSYLVANIA 
AND IN CHAUTAUQUA COUNTY. STAY INDOORS AWAY FROM WINDOWS.

MCLAUGHLIN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 11:16 PM EDTSevere Thunderstorm WarningBUFChautauqua59 min
Sep 20, 11:48 PM EDTSevere Thunderstorm WarningBUFErie57 min

Nearby

Severe Thunderstorm Warnings in New York, 2000Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.