Alert archive / New York / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 25, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Aug 20, 1993, 4:30 PM EDT for Erie County, New York. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1993, 4:30 PM EDT (20:30 UTC)
- Expired
- Aug 20, 1993, 5:30 PM EDT
- In force
- 60 min
- Issued by
- NWS Buffalo, NY
- Area
- Whole counties
County Erie County, NY
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.5 hours before the alert went out and 20 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
- 311 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBUF 202037 RRA SVRBUF NYC029-202130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BUFFALO NY 430 PM EDT FRI AUG 20 1993 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN NEW YORK ...ERIE COUNTY AND ADJACENT WATERS OF THE GREAT LAKES AT 435PM A SEVERE THUNDERSTORM WAS OVER LAKE ERIE ABOUT 10 MILES NORTHWEST OF BUFFALO. IT WILL MOVE SOUTHEAST ACROSS CENTRAL AND SOUTHERN ERIE COUNTY BETWEEN 445PM AND 530PM. THIS STORM WILL PRODUCE TORRENTIAL RAIN...STRONG WINDS AND POSSIBLE HAIL. THE STORM MAY MOVE OVER THE ERIE COUNTY FAIRGROUNDS...AND FAIRGOERS SHOULD GET INSIDE A STURDY BUILDING AND STAY AWAY FROM METAL RIDES AND EXHIBITS UNTIL THE STORM HAS PASSED. BE ON THE ALERT FOR THUNDERSTORMS ACCOMPANIED BY FREQUENT LIGHTNING...STRONG DAMAGING WINDS AND LARGE HAIL. LOCALLY HEAVY RAIN MAY ALSO CAUSE DRAINAGE FLOODING. RDM
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, Aug 20, 3:25 PM EDT, 1 hour 5 minutes before
NYZ002-202030- SPECIAL WEATHER STATEMENT...THUNDERSTORM NATIONAL WEATHER SERVICE ROCHESTER NY 324 PM EDT FRI AUG 20 1993 ...A LINE OF STRONG THUNDERSTORMS IS MOVING ACROSS MONROE AND WAYNE COUNTIES... AT 323 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN...GUSTY WINDS...AND POSSIBLY SOME SMALL HAIL FROM NEAR NINE MILE POINT IN NORTHEAST MONROE COUNTY BACK TO THE WEST AND SOUTHWEST ACROSS ROCHESTER ON BACK TO THE CHURCHVILLE AREA IN WESTERN MONROE COUNTY. THIS LINE OF STORMS PRODUCED NEARLY HALF AN INCH OF RAIN WITHIN 10 MINUTES IN IRONDEQUIOT AS WELL AS 35 MPH WINDS AT THE ROCHESTER INTERNATIONAL AIRPORT. THESE THUNDERSTORMS ARE MOVING TO THE EAST AND SOUTHEAST AT F35 MPH AND WILL AFFECT MONROE... WAYNE...NORTHERN LIVINGSTON...AND NORTHERN ONTARIO COUNTIES DURING THE NEXT HOUR. BASIL
Special weather statement, Aug 20, 3:39 PM EDT, 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 339 PM EDT FRI AUG 20 1993 DO NOT USE AFTER 5PM... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8PM... AT 335 PM...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER WESTERN AND CENTRAL NEW YORK...SOUTHERN ONTARIO...AND ADJOINING PARTS OF LAKES ERIE AND ONTARIO. STRONG THUNDERSTORMS COVERED MUCH OF WAYNE...MONROE... GENESEE AND NORTHERN NIAGARA COUNTIES OF NEW YORK. THESE STORMS WILL PRODUCE STRONG WINDS...TORRENTIAL RAINS AND POSSIBLY HAIL AS THEY MOVE TO THE SOUTHEAST AT 30 MILES AN HOUR. HEAVY RAINS MAY PRODUCE LOCALIZED URBAN FLOODING AS THESE THUNDERSTORMS MOVE ACROSS THE AREA THIS AFTERNOON. IF YOU SEE A FLOODED ROAD...DO NOT ATTEMPT TO DRIVE THROUGH IT. SLOW DOWN IF YOU ARE ON THE HIGHWAY... WATER ON THE ROADWAY CAN CAUSE HYDROPLANING. DEG/RDM
Special weather statement, Aug 20, 3:40 PM EDT, 50 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 339 PM EDT FRI AUG 20 1993 DO NOT USE AFTER 5PM... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8PM... AT 335 PM...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER WESTERN AND CENTRAL NEW YORK...SOUTHERN ONTARIO...AND ADJOINING PARTS OF LAKES ERIE AND ONTARIO. STRONG THUNDERSTORMS COVERED MUCH OF WAYNE...MONROE... GENESEE AND NORTHERN NIAGARA COUNTIES OF NEW YORK. THESE STORMS WILL PRODUCE STRONG WINDS...TORRENTIAL RAINS AND POSSIBLY HAIL AS THEY MOVE TO THE SOUTHEAST AT 30 MILES AN HOUR. HEAVY RAINS MAY PRODUCE LOCALIZED URBAN FLOODING AS THESE THUNDERSTORMS MOVE ACROSS THE AREA THIS AFTERNOON. IF YOU SEE A FLOODED ROAD...DO NOT ATTEMPT TO DRIVE THROUGH IT. SLOW DOWN IF YOU ARE ON THE HIGHWAY... WATER ON THE ROADWAY CAN CAUSE HYDROPLANING. DEG/RDM
Special weather statement, Aug 20, 4:05 PM EDT, 25 minutes before
NYZ001-021-022-002-003-004-005-202100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 405 PM EDT FRI AUG 20 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF WESTERN AND CENTRAL NEW YORK UNTIL 8:00 PM... AT 400 PM...THUNDERSTORMS CONTINUED MOVING OVER PORTIONS OF WESTERN NEW YORK AND SOUTHERN ONTARIO. THE MOST CONCENTRATED ACTIVITY CONTINUED TRAINING ACROSS BUFFALO AND ITS NORTHERN SUBURBS AND WAS REDEVELOPING OVER THE NIAGARA PENINSULA. TORRENTIAL RAINS HAVE OCCURRED OVER PARTS OF THE BUFFALO AREA WITH WELL OVER AN INCH AND A HALF BEING REPORTED AT THE BUFFALO AIRPORT SINCE 1 PM. THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE OVER AMHERST IN ERIE COUNTY...OVER MEDINA IN ORLEANS COUNTY AND NEAR NEWARK IN WAYNE COUNTY. THE ACTIVITY WAS MOVING EAST SOUTHEAST AT 35 MILES AN HOUR. BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND BE PREPARED TO TAKE SHELTER IF CONDITIONS WARRANT. THE GREATEST HAZARD FROM THESE STORMS APPEARES TO BE THE TORRENTIAL RAINS...KEEP AN EYE OUT FOR FLOODED UNDERSPASSES AND POOR DRAINAGE FLOODING. THE POTENTIAL FOR ADDITIONAL STORMS WILL CONTINUE OVER THE BUFFALO METRO AREA FOR THE NEXT COUPLE OF HOURS. MCLAUGHLIN
Special weather statement, Aug 20, 4:13 PM EDT, 17 minutes before
NYZ001-021-022-002-003-004-005-202100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BUFFALO NY 405 PM EDT FRI AUG 20 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF WESTERN AND CENTRAL NEW YORK UNTIL 8:00 PM... AT 400 PM...THUNDERSTORMS CONTINUED MOVING OVER PORTIONS OF WESTERN NEW YORK AND SOUTHERN ONTARIO. THE MOST CONCENTRATED ACTIVITY CONTINUED TRAINING ACROSS BUFFALO AND ITS NORTHERN SUBURBS AND WAS REDEVELOPING OVER THE NIAGARA PENINSULA. TORRENTIAL RAINS HAVE OCCURRED OVER PARTS OF THE BUFFALO AREA WITH WELL OVER AN INCH AND A HALF BEING REPORTED AT THE BUFFALO AIRPORT SINCE 1 PM. THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE OVER AMHERST IN ERIE COUNTY...OVER MEDINA IN ORLEANS COUNTY AND NEAR NEWARK IN WAYNE COUNTY. THE ACTIVITY WAS MOVING EAST SOUTHEAST AT 35 MILES AN HOUR. BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND BE PREPARED TO TAKE SHELTER IF CONDITIONS WARRANT. THE GREATEST HAZARD FROM THESE STORMS APPEARES TO BE THE TORRENTIAL RAINS...KEEP AN EYE OUT FOR FLOODED UNDERSPASSES AND POOR DRAINAGE FLOODING. THE POTENTIAL FOR ADDITIONAL STORMS WILL CONTINUE OVER THE BUFFALO METRO AREA FOR THE NEXT COUPLE OF HOURS. MCLAUGHLIN
Special weather statement, Aug 20, 4:30 PM EDT, 0 minutes before
NYZ002-202130- SPECIAL WEATHER STATEMENT...THUNDERSTORM NATIONAL WEATHER SERVICE ROCHESTER NY 428 PM EDT FRI AUG 20 1993 ...STRONG THUNDERSTORMS ARE MOVING ACROSS THE WESTERN FINGER LAKES AREA... AT 417 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN...GUSTY WINDS...AND POSSIBLY SOME SMALL HAIL FROM EXTREME SOUTHEAST WAYNE COUNTY AND NORTHERN SENECA COUNTY BACK TO THE WEST AND SOUTHWEST OVER ONTARIO AND SOUTHERN LIVINGSTON COUNTIES. ANOTHER CLUSTER OF THUNDERSTORMS WAS OVER GENESSE COUNTY AND APPROACHING SOUTHWESTERN MONROE AND NORTHERN LIVINGSTON COUNTY. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 800 PM. SOME THUNDERSTORMS MAY PRODUCE WIND GUSTS OF OVER 55 MPH ALONG WITH DAMAGING HAIL. THESE THUNDERSTORMS WERE MOVING TO THE EAST AND SOUTHEAST AT 35 TO 40 MPH. BASIL
Nearby
Severe Thunderstorm Warnings in New York, 1993Every severe thunderstorm warning in 1993
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.