Alert archive / New York / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 29, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 23, 1991, 5:00 AM EDT for Allegany County, Cattaraugus County, New York. It was in force for 60 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 23, 1991, 5:00 AM EDT (09:00 UTC)
- Expired
- Jul 23, 1991, 6:00 AM EDT
- In force
- 60 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, 5:08 AM EDT | Thunderstorm Wind 0 | Cattaraugus, 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, 9.0 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 230900
SVRBUF
NYC003-009-231000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
500 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 500 AM RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS OVER CENTRAL
AND SOUTHERN PORTIONS OF CHAUTAUQUA AND CATTARAUGUS COUNTIES.
THE THUNDERSTORMS WERE MOVING EAST AT 50 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.
REMINGTONWhat 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, 3 hours 5 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
Special weather statement, Jul 23, 3:41 AM EDT, 1 hour 19 minutes before
NYZ001-003-022-230900- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 330 AM EDT TUE JUL 23 1991 DO NOT USE AFTER 5 AM... AT 330 AM...SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN... STRETCHED ALONG THE SOUTHERN TIER OF NEW YORK FROM JAMESTOWN EAST TO CORNING. STRONGEST STORMS WERE 10 MILES WEST OF CORNING AND ALONG THE NEW YORK-PENNSYLVANIA BORDER JUST SOUTH OF WELLSVILLE. SOME OF THESE STORMS HAVE A HISTORY OF STRONG DAMAGING WINDS...FREQUENT LIGHTNING...AND TORRENTIAL DOWNPOURS. MOVEMENT WAS EAST SOUTHEAST AT 50 MILES AN HOUR. ELSEWHERE...SEVERAL THUNDERSTORMS WERE OVER EASTERN LAKE ERIE FROM 10 MILES WEST OF DUNKIRK...SOUTHWEST TO 15 MILnES NORTH OF CONNEAUT OHIO. THESE STORMS WERE MOVING EAST AT 50 MILES AN HOUR AND SHOULD MOVE INTO CHAUTUAUQUA COUNTY AGAIN BY 4 AM. MCLAUGHLIN
Special weather statement, Jul 23, 4:42 AM EDT, 18 minutes before
NYZ001-003-022-231000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 430 AM EDT TUE JUL 23 1991 AT 430 AM...THUNDERSTORMS WITH VERY HEAVY RAIN WERE OVER JAMESTOWN AND ELLICOTTVILLE. THESE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND THUNDERSTORMS WHICH COVERED MOST OF CHAUTAUQUA AND CATTARAUGUS COUNTIES OF NEW YORK AND NORTHERN WARREN COUNTY PENNSYLVANIA. SOME OF THESE STORMS MAY CONTAIN STRONG GUSTY WINDS...FREQUENT LIGHTNING ...AND TORRENTIAL DOWNPOURS. ELSEWHERE...SHOWERS AND THUNDERSTORMS WERE OVER THE CENTRAL SOUTHERN TIER FROM WATKINS GLEN TO ELMIRA...AND SOUTH TO WILLIAMSPORT PENNSYLVANIA. A COUPLE OF SHOWERS HAVE ALSO APPEARED OVER ONTARIO BETWEEN LONDON AND PORT DOVER...OR ABOUT 80 MILES WEST OF BUFFALO. MOVEMENT OF ALL ACTIVITY WAS EAST AT 50 MILES AN HOUR. MCLAUGHLIN
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 2:19 AM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 56 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.