Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 97, NWS Buffalo, NY

September 28, 2009Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 28, 2009, 10:59 AM EDT for Erie County, Niagara County, New York. It was in force for 61 min. 8 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 28, 2009, 10:59 AM EDT (14:59 UTC)
Expired
Sep 28, 2009, 12:00 PM EDT
In force
61 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 24 km from the middle of the area, began a volume at 14:59 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.

What was reported inside it

TimeReportWhereRemark
Sep 28, 11:07 AM EDTTSTM WND DMG1 N Niagara Falls, NYTREE AND WIRES DOWN ON SENECA AVE.
Sep 28, 11:31 AM EDTTSTM WND DMG3 N Buffalo, NYTREES AND WIRES DOWN OXFORD AVE
Sep 28, 11:32 AM EDTTSTM WND DMGTonawanda, NYTREE AND WIRES DOWN ON TREMONT AVE
Sep 28, 11:33 AM EDTTSTM WND DMG4 Ne Buffalo, NYTREE AND DEBRIS ON ROUTE 33
Sep 28, 11:36 AM EDTTSTM WND DMG1 S Newfane, NYMULTIPLE REPORTS OF TREES AND WIRES DOWN ON EWINGS ROAD
Sep 28, 11:37 AM EDTTSTM WND DMGLockport, NYTREE AND WIRES DOWN NEAR CHESTNUT STREET AND MCCOLLUM STREET
Sep 28, 11:38 AM EDTTSTM WND DMG2 E Williamsville, NYTREE DOWN NEAR TRANSIT RD
Sep 28, 11:41 AM EDTTSTM WND GST 58Pendleton, NYAT STAR POINT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.0 hours before the alert went out and 27 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.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2009-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2009-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
765 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
269 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KBUF 281459
SVRBUF
NYC029-063-281600-
/O.NEW.KBUF.SV.W.0097.090928T1459Z-090928T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1059 AM EDT MON SEP 28 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ERIE COUNTY IN WESTERN NEW YORK
  NIAGARA COUNTY IN WESTERN NEW YORK

* UNTIL NOON EDT

* AT 1057 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 5 MILES EAST OF YOUNGSTOWN TO 14 MILES SOUTHWEST OF KENMORE...
  AND MOVING NORTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SANBORN AND NORTH TONAWANDA BY 1110 AM EDT...
  TONAWANDA AND KENMORE BY 1115 AM EDT...
  PENDLETON AND NEWFANE BY 1120 AM EDT...
  WILLIAMSVILLE...NEWFANE AND LOCKPORT BY 1125 AM EDT...
  AMHERST BY 1130 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4334 7874 4336 7873 4335 7868 4337 7863
      4337 7846 4291 7846 4292 7892 4296 7893
      4295 7895 4297 7902 4302 7904 4307 7899
      4308 7906 4327 7907
TIME...MOT...LOC 1459Z 234DEG 36KT 4327 7893 4284 7905

$$

TMA
2 follow-up statements
000 
WWUS51 KBUF 281536
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1136 AM EDT MON SEP 28 2009

NYC029-063-281600-
/O.CON.KBUF.SV.W.0097.000000T0000Z-090928T1600Z/
NIAGARA NY-ERIE NY-
1136 AM EDT MON SEP 28 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
NORTHERN ERIE AND NIAGARA COUNTIES...

AT 1135 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR NEWFANE...OR 6 MILES 
NORTH OF LOCKPORT...MOVING NORTHEAST AT 50 MPH. ADDITIONAL STORMS 
WERE LOCATED OVER THE NIAGARA PENINSULA.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BARKER BY 1145 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT MONDAY
AFTERNOON FOR WESTERN NEW YORK.

&&

LAT...LON 4334 7874 4336 7873 4335 7868 4337 7863
      4337 7846 4291 7846 4292 7892 4296 7893
      4295 7895 4297 7902 4302 7904 4307 7899
      4308 7906 4327 7907
TIME...MOT...LOC 1535Z 232DEG 44KT 4326 7867

$$

TMA
000 
WWUS51 KBUF 281601
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1201 PM EDT MON SEP 28 2009

NYC029-063-281612-
/O.EXP.KBUF.SV.W.0097.000000T0000Z-090928T1600Z/
NIAGARA NY-ERIE NY-
1201 PM EDT MON SEP 28 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ERIE AND NIAGARA
COUNTIES HAS EXPIRED...

AT 1202 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT MONDAY
AFTERNOON FOR WESTERN NEW YORK.

LAT...LON 4334 7874 4336 7873 4335 7868 4337 7863
      4337 7846 4291 7846 4292 7892 4296 7893
      4295 7895 4297 7902 4302 7904 4307 7899
      4308 7906 4327 7907
TIME...MOT...LOC 1536Z 232DEG 44KT 4326 7866

$$

TMA

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 10:07 AM EDTSpecial Marine WarningBUF83 min
Sep 28, 10:37 AM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie68 min
Sep 28, 11:09 AM EDTLakeshore Flood WarningBUFErie5 hr
Sep 28, 11:26 AM EDTSpecial Marine WarningBUF64 min
Sep 28, 12:10 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Ontario, Orleans, Wayne and 1 more65 min
Sep 28, 12:25 PM EDTSpecial Marine WarningBUF65 min
Sep 28, 1:08 PM EDTSevere Thunderstorm WarningBUFMonroe, Ontario, Wayne52 min
Sep 28, 1:18 PM EDTSpecial Marine WarningBUF57 min
Sep 28, 1:23 PM EDTSevere Thunderstorm WarningBUFErie, Genesee37 min
Sep 28, 1:47 PM EDTSevere Thunderstorm WarningBUFCayuga, Jefferson, Oswego, Wayne58 min
Sep 28, 1:58 PM EDTSpecial Marine WarningBUF2 hr
Sep 28, 2:01 PM EDTSpecial Marine WarningBUF59 min
Sep 28, 2:08 PM EDTSpecial Marine WarningBUF37 min
Sep 28, 2:19 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Niagara, Orleans41 min
Sep 28, 4:06 PM EDTLakeshore Flood StatementBUFErie10 hr
Sep 28, 5:06 PM EDTAreal Flood AdvisoryBUFErie, Niagara3 hr
Sep 28, 5:24 PM EDTSevere Thunderstorm WarningBUFErie51 min
Sep 28, 5:57 PM EDTSevere Thunderstorm WarningBUFErie33 min
Sep 28, 6:26 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Orleans49 min
Sep 28, 7:43 PM EDTAreal Flood WarningBUFCattaraugus, Chautauqua, Erie, Genesee, Wyoming6 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.