Alert archive / New York / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 23, NWS Buffalo, NY

July 11, 2001Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 11, 2001, 12:31 AM EDT for Livingston County, Ontario County, New York. It was in force for 59 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: Jul 11, 2001, 12:31 AM EDT (04:31 UTC)
Expired: Jul 11, 2001, 1:30 AM EDT
In force: 59 min
Issued by: NWS Buffalo, NY
Area: Whole counties

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 99 km from the middle of the area, began a volume at 04:34 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.

What was reported inside it

Time	Report	Where	Remark
Jul 11, 12:48 AM EDT	Thunderstorm Wind 50 E	Canandaigua, 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, 4.5 hours before the alert went out and 96 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: 686 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1415 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 39 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 110432
SVRBUF

NYC051-069-110530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1231 AM EDT WED JUL 11 2001

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LIVINGSTON AND ONTARIIO COUNTIES IN WESTERN NEW YORK  
  THIS INCLUDES THE CITY OF CANANDAIGUA

* UNTIL 130 AM EDT

* AT 1222 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES WEST OF LIMA...OR ABOUT 7 MILES
  NORTHEAST OF GENESEO...MOVING EAST AT 40 MPH.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 10:11 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	49 min
Jul 10, 10:40 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	65 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.