Alert archive / New York / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 30, NWS Buffalo, NY

October 4, 1990Genesee County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 4, 1990, 9:05 PM EDT for Genesee County, Wyoming County, New York. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Oct 4, 1990, 9:05 PM EDT (01:05 UTC)
Expired
Oct 4, 1990, 10:00 PM EDT
In force
55 min
Issued by
NWS Buffalo, NY
Area
Whole counties

Counties Genesee County, NY, Wyoming County, NY

The radar

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.1 hours before the alert went out and 41 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, Buffalo Intl Airport, NY at 00:00Z on 1990-10-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 443 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 1990-10-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.1939587897117136Sfc1 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
443 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
968 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Oct 4, 6:42 PM EDT, 2 hours 23 minutes before
NYZ001-021-042330-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BUFFALO NY
635 PM EDT THU OCT 4 1990

DO NOT USE AFTER 8PM...

AT 630 PM... BUFFALO RADAR INDICATED A 20 MILE WIDE LINE OF SHOWERS
AND THUNDERSTORMS...SOME WITH BRIEF HEAVY RAINS...OVER ONTARIO FROM
LAKE SIMCOE...SOUTHWARD ACROSS METRO TORONTO...THE WESTERN END OF
LAKE ONTARIO...HAMILTON...AND THE WESTERN PORTION OF THE NIAGARA
PENINSULA. THE STRONGEST STORM WAS JUST WEST OF GRIMSBY.

THIS LINE OF SHOWERS IS RACING EASTWARD AT 60 MILES AN HOUR AND HAS
A HISTORY OF VERY STRONG WINDS OVER ONTARIO DURING THE PAST HOUR.
A MARINE WARNING REMAINS IN EFFECT UNTIL 8PM ALONG THE NEW YORK
SHORELINE OF LAKE ONTARIO FROM THE NIAGARA RIVER TO THIRTY MILE POINT.

SFM
Special weather statement, Oct 4, 7:43 PM EDT, 1 hour 22 minutes before
NYZ001-021-050030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BUFFALO NY
735 PM EDT THU OCT 4 1990

DO NOT USE AFTER 9PM...

AT 730 PM... SHOWERS AND A FEW THUNDERSTORMS WERE OVER NIAGARA COUNTY
OF NEW YORK AND THE ADJACENT COASTAL WATERS OF LAKE ONTARIO. THESE
SHOWERS EXTENDED NORTHWARD ACROSS LAKE ONTARIO TO PORT HOPE. THIS
SYSTEM HAS A HISTORY OF BRIEF VERY STRONG WINDS OVER ONTARIO DURING THE
PAST FEW HOURS. THIS AREA CONTINUES TO RACE EASTWARD AT 50 MILES AN HOUR
WITH A SLIGHT DECREASE IN INTENSITY AND COVERAGE DURING THE PAST HOUR.
A MARINE WARNING REMAINS IN EFFECT ALONG THE NEW YORK SHORELINE OF
LAKE ONTARIO FROM THE NIAGARA RIVER TO THIRTY MILE POINT UNTIL7 8PM.

ELSEWHERE...SHOWERS WERE NEAR LONG POINT AND ALSO ABOUT 30 MILES NORTH
OF LONDON. THESE SHOWERS WERE MOVING EAST AT ABOUT 40 MILES AN HOUR.

SFM
Special weather statement, Oct 4, 8:41 PM EDT, 24 minutes before
NYZ001-021-022-050130-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BUFFALO NY
835 PM EDT THU OCT 4 1990

DO NOT USE AFTER 10PM...

A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR ERIE COUNTY UNTIL 930 PM.

AT 830 PM... BUFFALO RADAR INDICATED A LINE OF THUNDERSTORMS...SOME WITH
HEAVY RAIN AND VERY STRONG WINDS...MOVING INTO THE GREATER BUFFALO AREA.
THE STORMS COVERED WESTERN ERIE...WESTERN NIAGARA... AND NORTHERN
CHAUTAUQUA COUNTIES OF NEW YORK...EASTERN LAKE ERIE AND THE EASTERN PORTION
OF THE NIAGARA PENINSULA OF ONTARIO. THE STORMS ARE MOVING EAST AT 50
MILES AN HOUR AND SHOULD CROSS THE ENTIRE METRO AREA DURING THE NEXT HOUR.

ELSEWHERE...LIGHT SHOWERS WERE OVfER ONTARIO JUST NORTHWEST OF TORONTO...
AND OVER LAKE ONTARIO NORTH OF ROCHESTER. THESE SHOWERS ARE ALSO MOVING
EAST AT 50 MILES AN HOUR.
SFM

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 4, 8:35 PM EDTSevere Thunderstorm WarningBUFErie55 min
Oct 4, 10:50 PM EDTSevere Thunderstorm WarningBUFErie70 min

Nearby

Severe Thunderstorm Warnings in New York, 1990Every 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; the sounding from the Mesonet's radiosonde archive.