Alert archive / New York / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 10, NWS Buffalo, NY

June 20, 2001Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 20, 2001, 2:45 AM EDT for Erie County, Niagara County, New York. It was in force for 60 min. 2 reports 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: Jun 20, 2001, 2:45 AM EDT (06:45 UTC)
Expired: Jun 20, 2001, 3:45 AM EDT
In force: 60 min
Issued by: NWS Buffalo, NY
Area: Whole counties

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 2 km from the middle of the area, began a volume at 06:45 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
Jun 20, 3:20 AM EDT	Thunderstorm Wind 50 E	Kenmore, NY
Jun 20, 3:30 AM EDT	Thunderstorm Wind 52 E	North Tonawanda, 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 nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 6.8 hours before the alert went out and 5 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: 348 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 2025 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 200650
SVRBUF

NYC029-063-200745-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
245 AM EDT WED JUN 20 2001

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ERIE COUNTY IN WESTERN NEW YORK
  THIS INCLUDES THE CITIES OF...KENMORE...NORTH BUFFALO...
  TONAWANDA AND 
  NIAGARA COUNTY IN WESTERN NEW YORK
  THIS INCLUDES THE CITIES OF...LOCKPORT...NIAGARA FALLS...NORTH
  TONAWANDA

* UNTIL 345 AM EDT

* AT 240 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF SEVERE THUNDERSTORMS EXTENDING ACROSS EASTERN LAKE ERIE
  AND THE THE NIAGARA PENINSULA ... MOVING NORTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL CROSS...
  NIAGARA FALLS...LEWISTON...YOUNGSTOWN...GRAND ISLAND  
  NORTH BUFFALO...KENMORE...AND THE TONAWANDAS.

THESE ARE DANGEROUS STORMS WITH DAMAGING WINDS. STAY INDOORS AWAY 
FROM WINDOWS.

LEVAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:58 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	62 min
Jun 20, 6:44 AM EDT	Severe Thunderstorm Warning	BUF	Monroe	31 min

Nearby

Severe Thunderstorm Warnings in New York, 2001 Every severe thunderstorm warning in 2001

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; radar from the NEXRAD Level II archive.