Alert archive / New York / Tornado Warnings in 1999

Tornado Warning 1, NWS Buffalo, NY

July 9, 1999Chautauqua County, New York

NWS Buffalo, NY issued this tornado warning at Jul 9, 1999, 6:34 PM EDT for Chautauqua County, New York. It was in force for 36 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: Jul 9, 1999, 6:34 PM EDT (22:34 UTC)
Expired: Jul 9, 1999, 7:10 PM EDT
In force: 36 min
Issued by: NWS Buffalo, NY
Area: Whole counties

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 22:37 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 9, 6:40 PM EDT	Thunderstorm Wind	Stockton, NY
Jul 9, 7:00 PM EDT	Thunderstorm Wind	Ellington, 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 12:00Z, 10.6 hours before the alert went out and 91 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1155 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 519 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBUF 092236 RRA
TORBUF
NYC013-092310-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
634 PM EDT FRI JUL 9 1999

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* TORNADO WARNING FOR...
  CHAUTAUQUA COUNTY IN WESTERN NEW YORK

* UNTIL 710 PM EDT

* AT 6:30 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 5 MILES EAST OF MAYVILLE... MOVING EAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  ELLINGTON BY 6:55 PM EDT

IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.


THIS IS A DANGEROUS STORM.  ACT QUICKLY. TAKE COVER BELOW GROUND IF
AVAILABLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM...SUCH AS A
BATHROOM OR CLOSET...ON THE LOWEST FLOOR POSSIBLE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 6:54 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie	46 min
Jul 9, 7:24 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	51 min
Jul 9, 7:42 PM EDT	Tornado Warning	BUF	Cattaraugus	48 min

Nearby

Tornado Warnings in New York, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.