Alert archive / New York / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 42, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 11, 2009, 8:27 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2009, 8:27 PM EDT (00:27 UTC)
- Expired
- Jul 11, 2009, 9:15 PM EDT
- In force
- 48 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY
The radar
The Buffalo radar (KBUF), 60 km from the middle of the area, began a volume at 00:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.5 hours before the alert went out and 59 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
- 1688 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 816 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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.
NWS Buffalo, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 7:46 PM EDT, 41 minutes earlier.
Area forecast discussion, Jul 11, 7:46 PM EDT, 41 minutes before
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</html>Hazardous weather outlook, Jul 11, 3:24 PM EDT, 5 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BUFFALO NY 324 PM EDT SAT JUL 11 2009 NYZ001>008-010>014-019>021-085-121500- NIAGARA-ORLEANS-MONROE-WAYNE-NORTHERN CAYUGA-OSWEGO-JEFFERSON-LEWIS- NORTHERN ERIE-GENESEE-WYOMING-LIVINGSTON-ONTARIO-CHAUTAUQUA- CATTARAUGUS-ALLEGANY-SOUTHERN ERIE- 324 PM EDT SAT JUL 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL NEW YORK. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF LEZ020-040-041-LOZ042>045-062>065-SLZ022-024-121500- UPPER NIAGARA RIVER AND BUFFALO HARBOR- LAKE ERIE NEARSHORE WATERS FROM RIPLEY TO DUNKIRK- LAKE ERIE NEARSHORE WATERS FROM DUNKIRK TO BUFFALO- LAKE ONTARIO NEARSHORE WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO NEARSHORE WATERS FROM HAMLIN BEACH TO SODUS BAY- LAKE ONTARIO NEARSHORE WATERS FROM SODUS BAY TO MEXICO BAY- LAKE ONTARIO NEARSHORE WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER- LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO SODUS BAY- LAKE ONTARIO OPEN WATERS FROM SODUS BAY TO MEXICO BAY- LAKE ONTARIO OPEN WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER- SAINT LAWRENCE RIVER FROM CAPE VINCENT TO OGDENSBURG- SAINT LAWRENCE RIVER FROM OGDENSBURG TO SAINT REGIS- 324 PM EDT SAT JUL 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE ONTARIO AND SAINT LAWRENCE RIVER. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF
In the hours before
Special weather statement, Jul 11, 2:30 PM EDT, 5 hours 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 230 PM EDT SAT JUL 11 2009 NYZ005-006-111930- CAYUGA NY-OSWEGO NY- 230 PM EDT SAT JUL 11 2009 ...LINE OF STRONG THUNDERSTORMS MOVING ACROSS NORTHERN CAYUGA AND OSWEGO COUNTIES... * AT 228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS PRODUCING VERY HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES NORTHWEST OF CATO TO 9 MILES SOUTH OF WEEDSPORT...AND MOVING EAST AT 30 MPH. * STRONG THUNDERSTORMS WILL BE NEAR... IRA AT 235 PM EDT... FULTON AT 250 PM EDT... PHOENIX AT 300 PM EDT... PALERMO AT 305 PM EDT... SAND RIDGE AT 310 PM EDT... CENTRAL SQUARE AT 315 PM EDT... FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY RSH
Special weather statement, Jul 11, 5:21 PM EDT, 3 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 521 PM EDT SAT JUL 11 2009 NYZ019-020-112215- CATTARAUGUS NY-CHAUTAUQUA NY- 521 PM EDT SAT JUL 11 2009 ...LINE OF STRONG THUNDERSTORMS MOVING ACROSS SOUTHERN CHAUTAUQUA AND CATTARAUGUS COUNTIES... * AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL AND HEAVY RAIN OVER SOUTHERN PARTS OF CHAUTAUQUA COUNTY. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES WEST OF CHAUTAUQUA INSTITUTE TO CLYMER...AND MOVING EAST AT 35 MPH. * STRONG THUNDERSTORMS WILL BE NEAR... CHAUTAUQUA INSTITUTE AT 530 PM EDT... BEMUS POINT AT 535 PM EDT... LAKEWOOD AT 545 PM EDT... GERRY AT 550 PM EDT... FALCONER AT 555 PM EDT... FREWSBURG AT 600 PM EDT... THESE STORMS HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL AND/OR DAMAGING WINDS. RSH
Special weather statement, Jul 11, 5:25 PM EDT, 3 hours 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 525 PM EDT SAT JUL 11 2009 NYZ012-013-020-021-112215- ALLEGANY NY-CATTARAUGUS NY-LIVINGSTON NY-WYOMING NY- 525 PM EDT SAT JUL 11 2009 ...STRONG THUNDERSTORM MOVING ACROSS SOUTHERN WYOMING AND NORTHERN ALLEGANY COUNTIES... * AT 520 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CAPABLE OF PRODUCING VERY HEAVY RAIN OVER NORTHERNMOST ALLEGANY COUNTY. THIS STORM WAS LOCATED NEAR BLISS...AND MOVING EAST AT 35 TO 40 MPH. * THE STRONG THUNDERSTORM WILL BE NEAR... PIKE AT 530 PM EDT... PORTAGEVILLE AT 535 PM EDT... NUNDA AT 545 PM EDT... OSSIAN CENTER AT 555 PM EDT... DANSVILLE AT 605 PM EDT... THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL AND/OR DAMAGING WINDS. RSH
Special weather statement, Jul 11, 6:09 PM EDT, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 609 PM EDT SAT JUL 11 2009 NYZ020-112300- CATTARAUGUS NY- 609 PM EDT SAT JUL 11 2009 ...STRONG THUNDERSTORM MOVING ACROSS CATTARAUGUS COUNTY... * AT 607 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL. THIS STORM WAS LOCATED 13 MILES WEST OF SALAMANCA...AND MOVING EAST AT 35 MPH. * THE STRONG THUNDERSTORM WILL BE NEAR... LITTLE VALLEY AT 625 PM EDT... ELLICOTTVILLE AT 635 PM EDT... ISCHUA AT 700 PM EDT... THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL AND/OR DAMAGING WINDS. THIS STORM HAS THE POTENTIAL TO PRODUCE VERY HEAVY RAIN...AND COULD CAUSE LOCALIZED FLOODING OF ROADS AND POOR DRAINAGE AREAS. THIS STORM PRODUCED A HALF TO ONE INCH OF RAIN ACROSS SOUTHERN CHAUTAUQUA COUNTY BETWEEN 5 AND 6 PM. RSH
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 8:05 PM EDT | Special Marine Warning | BUF | 31 min | |
| Jul 11, 8:15 PM EDT | Areal Flood Advisory | BUF | Allegany, Livingston | 3 hr |
| Jul 11, 8:18 PM EDT | Special Marine Warning | BUF | 27 min | |
| Jul 11, 8:56 PM EDT | Special Marine Warning | BUF | 64 min | |
| Jul 11, 9:17 PM EDT | Special Marine Warning | BUF | 58 min | |
| Jul 11, 10:05 PM EDT | Severe Thunderstorm Warning | BUF | Oswego | 17 min |
Nearby
Severe Thunderstorm Warnings in New York, 2009Every severe thunderstorm warning in 2009
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; radar from the NEXRAD Level II archive.