Alert archive / New York / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 6, NWS Buffalo, NY

June 18, 1990Genesee County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 1990, 7:52 AM EDT for Genesee County, Orleans County, New York. It was in force for 68 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 18, 1990, 7:52 AM EDT (11:52 UTC)
Expired: Jun 18, 1990, 9:00 AM EDT
In force: 68 min
Issued by: NWS Buffalo, NY
Area: Whole counties

Counties Genesee County, NY, Orleans County, NY

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 18, 8:00 AM EDT	Thunderstorm Wind 0	Genesee, NY
Jun 18, 8:15 AM EDT	Thunderstorm Wind 0	Orleans, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 11.9 hours before the alert went out and 47 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: 916 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1362 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KALB 181151
SVRBUF
NYC073-037-181300-

BULLETIN  IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY...ISSUED BY ALBANY
752 AM EDT MON JUN 18 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 900 AM EDT FOR PEOPLE IN THE FOLLOWING NEW YORK
COUNTIES...

ORLEANS AND GENESEE

BUFFALO WEATHER RADAR AT 745 AM INDICATED A LINE OF VERY HEAVY
THUNDERSTORMS OVER NIAGARA AND ERIE COUNTIES...MOVING EAST AT 45 MPH.
<
BE ON THE ALERT FOR THUNDERSTORMS ACCOMPANIED BY FREQUENT LIGHTNING..
STRONG DAMAGING WINDS AND LARGE HAIL.  LOCALLY HEAVY RAIN MAY ALSO CAUSE
DRAINAGE FLOODING.

IF THREATENING WEATHER APPROACHES GO TO A SAFE PLACE IMMEDIATELY.
IN HOMES A BASEMENT OR INTERIOR ROOM IS THE SAFEST LOCATION.

SAGE/LAPENTA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 6:25 AM EDT	Severe Thunderstorm Warning	BUF	Chautauqua, Erie	65 min
Jun 18, 6:55 AM EDT	Severe Thunderstorm Warning	BUF	Niagara	65 min
Jun 18, 7:25 AM EDT	Severe Thunderstorm Warning	BUF	Erie	35 min
Jun 18, 9:30 AM EDT	Severe Thunderstorm Warning	BUF	Allegany	50 min

Nearby

Severe Thunderstorm Warnings in New York, 1990 Every severe thunderstorm warning in 1990

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.