Alert archive / New York / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 22, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 7, 1991, 5:53 AM EDT for Chautauqua County, New York. It was in force for 67 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 7, 1991, 5:53 AM EDT (09:53 UTC)
- Expired
- Jul 7, 1991, 7:00 AM EDT
- In force
- 67 min
- Issued by
- NWS Buffalo, NY
- Area
- Whole counties
County Chautauqua County, NY
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 6:10 AM EDT | Thunderstorm Wind 0 | Chautauqua, 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, 9.9 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2191 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBUF 071000
SVRBUF
NYC013-071100-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
553 AM EDT SUN JUL 7 1991
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NEW YORK
...SOUTHERN CHAUTAUQUA
AT 550AM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM IN
SOUTHWESTERN CHAUTAUQUA COUNTY...NEAR FINDLEY LAKE. THE STORM WAS
MOVING TO THE 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 DRAINAGE FLOODING.
IF THREATEDNING WEATHER APPROACHES GO TO A SAFE PLACE IMMEDIATELY.
TANWhat 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 7, 3:30 AM EDT, 2 hours 23 minutes before
NYZ002-070900- SPECIAL WEATHER STATEMENT - THUNDERSTORMS NATIONAL WEATHER SERVICE ROCHESTER NY 330 AM EDT SUN JUL 7 1991 ...THUNDERSTORMS CONTAINING VERY HEAVY RAIN WERE APPROACHING THE WESTERN FINGER LAKES REGION AND GREATER ROCHESTER... AT 325 AM EDT...NATIONAL WEATHER SERVICE WEATHER RADAR INDICATED THAT AN AREA OF THUNDERSTORMS WAS JUST WEST OF THE ROCHESTER AREA. THESE THUNDERSTORMS WERE LOCATED ALONG THE SOUTH SHORE OF LAKE ONTARIO AND EXTEND WESTWARD INTO THE NIAGARA PENNISULA OF ONTARIO. THE STORMS ARE MOVING TO THE EAST AT AROUND 40 MPH AND SHOULD MOVE INTO THE ROCHESTER AREA...AND NORTHERN GENESEE RIVER VALLEY...BY 4AM. PERSONS IN THIS ABOVE AREA SHOULD BE ON THE LOOKOUT FOR THUNDERSTORMS CONTAINING GUSTY WINDS...DANGEROUS FREQUENT LIGHTNING...POSSIBLE HAIL... AND VERY HEAVY RAINS. HEAVY RAINS COULD CAUSE SOME DRAINAGE FLOODING. . YOU SHOULD KEEP LISTENING FOR LATER STATEMENTS AND POSSIBLE WARNINGS FROM YOUR LOCAL% NATIONAL WEATHER SERVICE OFFICE. IF THREATENING WEATHER APPROACHES SEEK SAFE SHELTER IMMEDIATELY. SCHWIBS
Special weather statement, Jul 7, 3:46 AM EDT, 2 hours 7 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 430 AM EDT SUN JUL 7 1991 DO NOT USE AFTER 6 AM ...SEVERE THUNDERSTORM WATCH 647 IS IN EFFECT UNTIL 9AM EDT FOR A LARGE PORTION OF WESTERN NEW YO
Special weather statement, Jul 7, 4:47 AM EDT, 1 hour 6 minutes before
RADAR SUMMARY (CORRECTED FOR CELL MOVEMENT) NATIONAL WEATHER SERVICE BUFFALO NY 430 AM EDT SUN JUL 7 1991 DO NOT USE AFTER 6 AM ...SEVERE THUNDERSTORM WATCH 647 IS IN EFFECT UNTIL 9AM EDT FOR A LARGE PORTION OF WESTERN NEW YORK... AT 430 AM...BUFFALO RADAR DETECTED A LINE OF THUNDERSTORMS WITH HEAVY RAINFALL AND NEARLY CONSTANT LIGHTNING THAT EXTENDED FROM NIAGARA COUNTY ...SOUTH THROUGH CHAUTAUQUA COUNTY AND NORTHWEST PENNSYLVANIA. THE STORMS ALSO EXTENDED BACK ACROSS THE NIAGARA PENINSULA OF ONTARIO. THE LINE OF THUNDERSTORMS WAS EMBEDDED IN A LARGER AREA OF SHOWERS THAT STRETCHED ACROSS ALL OF LAKE ONTARIO...WESTERN NEW YORK WEST OF THE GENESEE RIVER...LAKE ERIE AND SOUTHERN ONTARIO AS FAR WEST AS LONDON. THE ACTIVITY WAS MOVING EAST AT 40 MPH. MARBLE SIZE HAIL WAS REPORTED FROM THE VILLAGE OF KENMORE IN NORTHERN ERIE COUNTY DURING THE PAST HOUR. THE HEAVY DOWNPOURS ASSOCIATED WITH THESE STORMS COULD ALSO PRODUCE LOCALIZED FLOODING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. LISTEN FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS. TAN
Special weather statement, Jul 7, 4:49 AM EDT, 1 hour 4 minutes before
NYZ002-071000- SPECIAL WEATHER STATEMENT - THUNDERSTORMS NATIONAL WEATHER SERVICE ROCHESTER NY 445 AM EDT SUN JUL 7 1991 ...MORE THUNDERSTORMS CONTAINING VERY HEAVY RAIN WERE TO THE WEST OF ROCHESTER AND THE WESTERN FINGER LAKES REGION... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 AM EDT FOR THE GREATER ROCHESTER AREA... AT 440 AM EDT...NATIONAL WEATHER SERVICE WEATHER RADAR INDICATED THAT A THUNDERSTORM WITH VERY HEAVY RAIN WAS OVER WAYNE COUNTY. OTHER THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED FROM THE BUFFALO AREA SOUTHWARD INTO PENNSYLVANIA. THE STORMS ARE MOVING TO THE EAST AT AROUND 40 MPH AND SHOULD MOVE ACROSS OUR REGION DURING THE NEXT FEW HOURS. PERSONS IN THE WESTERN FINGER LAKES REGION AND GREATER ROCHESTER SHOULD BE ON THE LOOKOUT FOR THUNDERSTORMS WITH FREQUENT DANGEROUS LIGHTNING... HEAVY RAIN...GUSTY WINDS...AND POSSIBLE HAIL. HEAVY RAINS COULD CAUSE SOME DRAINAGE FLOODING. FREQUENT CLOUD TO GROUND LIGHTNING STRIKES ARE ASSOCIATED WITH THESE STORMS SO OBSERVE PROPER LIGHTNING SAFETY RULES TO HELP AVOID POSSIBLE INJURY OR DEATH. YOU SHOULD KEEP LISTENING FOR LATER STATEMENTS AND POSSIBLE WARNINGS FROM YOUR LOCAL NATIONAL WEATHER SERVICTE OFFICE. IF THREATENING WEATHER APPROACHES SEEK SAFE SHELTER IMMEDIATELY. SCHWIBS
Special weather statement, Jul 7, 5:50 AM EDT, 3 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY CORRECTED NATIONAL WEATHER SERVICE BUFFALO NY 530 AM EDT SUN JUL 7 1991 DO NOT USE AFTER 7 AM ...SEVERE THUNDERSTORM WATCH 647 IS IN EFFECT UNTIL 9AM EDT FOR A LARGE PORTION OF WESTERN NEW YORK... AT 530 AM...WEATHER RADAR INDICATED A LINE OF THUNDERSTOMS WITH HEAVY RAINFALL AND FREQUENT LIGHTNING THAT EXTENDED FROM ERIE PENNSYLVANIA ...EAST ACROSS CHAUTAUQUA AND CATTARAUGUS COUNTIES THEN SOUTH TO NEAR PHILLIPSBURG PENNSYLVANIA. THE STRONGEST STORM WAS LOCATED JUST EAST OF ERIE. SHOWERS CONTINUED OVER ALL OF LAKE ONTARIO WITH A STRONG THUNDERSTORM EMBEDDED IN THE AREA OVER LEWIS COUNTY...ABOUT 15 MILES SOUTH OF WATERTOWN. ANOTHER AREA OF SHOWERS AND THUNDERSTORMS ABOUT 40 MILES WIDE SOUTHERN ONTARIO FROM LONDON TO KITHCENER...AS WELL AS CENTRAL LAKE ERIE. THE ACTIVITY WAS MOVING EAST AT 40 MPH. TAN
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 6:15 AM EDT | Severe Thunderstorm Warning | BUF | 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.