Alert archive / New York / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 28, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 23, 1991, 2:19 AM EDT for Allegany County, Cattaraugus County, New York. It was in force for 56 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 23, 1991, 2:19 AM EDT (06:19 UTC)
- Expired
- Jul 23, 1991, 3:15 AM EDT
- In force
- 56 min
- Issued by
- NWS Buffalo, NY
- Area
- Whole counties
Counties Allegany County, NY, Cattaraugus County, NY
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 2:48 AM EDT | Thunderstorm Wind 0 | Cattaraugus, NY | |
| Jul 23, 2:50 AM EDT | Thunderstorm Wind 0 | Allegany, 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, 6.3 hours before the alert went out and 80 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.
- Mixed-layer CAPE
- 1173 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 944 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 9.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBUF 230620
SVRBUF
NYC003-009-230715-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
219 AM EDT TUE JUL 23 1991
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NEW YORK
...ALLEGANY AND CATTARAUGUS
AT 210 AM RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS OVER NORTHERN
PORTIONS OF CHUATAUQUA AND CATTARAUGUS COUNTIES. TREES AND POWER LINES
HAVE BEEN REPORTED DOWN IN FREDONIA AND THE TOWN OF SHERIDAN.
THE THUNDERSTORMS WERE MOVING EAST AT 40 MILES AN HOUR.
BE ON THE ALERT FOR THUNDERSTORMS ACCOMPANIED BY FREQUENT LIGHTNING
STRONG DAMAGING WINDS AND LARGE HAIL. LOCALLY HEAVY RAIN MAY ALSO
CAUSE POOR DRAINAGE FLOODING.
IF THREATENING WEATHER APPROACHES GO TO A SAFE PLACE IMMEDIATELY. IN
HOMES A BASEMENT OR INTERIOR ROOM IS THE SAFEST LOCATION.
WEBBERWhat 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, Jul 23, 1:55 AM EDT, 24 minutes before
NYZ001-022-230700- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 140 AM EDT TUE JUL 23 1991 DO NOT USE AFTER 3 AM... AT 140 AM...A GROWING AREA OF THUNDERSTORMS COVERED MUCH OF EASTERN LAKE ERIE...THE NORTHWEST CORNER OF PENNSYLVANIA...AND PORIONS OF SOUTHWEST NEW YORK. THE ACTIVITY WAS MOST CONCENTRATED IN A 20 MILE WIDE AREA WHICH STRETCHED FROM LONG POINT...EAST ACROSS THE LAKE INTO NORTHERN CHAUTAUQUA AND EXTREME SOUTHERN ERIE COUNTIES OF NEW YORK. STRONGEST STORMS WERE NEAR GOWANDA...DUNKIRK...AND 10 MILES NORTH OF WESTFIELD. THESE STORMS HAVE BEEN ACCOMPANIED BY FREQUENT LIGHTNING...HEAVY DOWNPOURS ...AND GUSTY WINDS. MOVEMENT WAS EAST AT 45 MILES AN HOUR. ELSEWHERE...THUNDERSTORMS WERE OVER EASTERN LAKE ONTARIO NEAR WATERTOWN...AND OVER CENTRAL NEW YORK EAST OF SYRACUSE. A NEW AREA OF THUNDERSTORMS WAS OVER SOUTHWESTERN ONTARIO FROM ST THOMAS BACK TO DETROIT. MOVEMENT OF THESE STORMS WAS EAST AT 40 MILES AN HOUR. SFM
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 5:00 AM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 60 min |
Nearby
Severe Thunderstorm Warnings in New York, 1991Every severe thunderstorm warning in 1991
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.