Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 90, NWS Buffalo, NY

September 4, 2011Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 4, 2011, 4:09 AM EDT for Erie County, Niagara County, New York. It was in force for 57 min. 5 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 4, 2011, 4:09 AM EDT (08:09 UTC)
Expired: Sep 4, 2011, 5:06 AM EDT
In force: 57 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 20 km from the middle of the area, began a volume at 08:08 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

Time	Report	Where	Remark
Sep 4, 4:25 AM EDT	TSTM WND DMG	North Tonawanda, NY	PUBLIC REPORTED SEVERAL APARTMENT WINDOWS BLOWN IN BY STORM
Sep 4, 4:26 AM EDT	TSTM WND GST 58	Niagara Falls Intl Arpt, NY
Sep 4, 4:27 AM EDT	TSTM WND DMG	1 Ne Lockport Junction, NY	POWER LINES DOWN ON UPPER MOUNTAIN ROAD
Sep 4, 4:31 AM EDT	TSTM WND DMG	South Lockport, NY	POWER LINES DOWN
Sep 4, 4:36 AM EDT	TSTM WND DMG	1 Sse Lancaster, NY	TREE DOWN ON LOMBARDY STREET

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 4, 3:26 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 8.2 hours before the alert went out and 22 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 889 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 86 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.

999 
WUUS51 KBUF 040809
SVRBUF
NYC029-063-040930-
/O.NEW.KBUF.SV.W.0090.110904T0809Z-110904T0930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
409 AM EDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 530 AM EDT

* AT 404 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE     
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS LINE OF       
  STORMS WAS LOCATED ABOUT 15 MILES WEST OF THE NIAGARA              
  RIVER...MOVING EAST AT 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
SUNDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4271 7904 4271 7899 4279 7886 4294 7892
      4299 7903 4306 7901 4307 7908 4313 7906
      4324 7907 4337 7848 4261 7848 4253 7905
      4254 7906 4259 7915
TIME...MOT...LOC 0808Z 245DEG 37KT 4318 7928 4259 7929

$$

APFFEL

2 follow-up statements

375 
WWUS51 KBUF 040837
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
437 AM EDT SUN SEP 4 2011

NYC029-063-040930-
/O.CON.KBUF.SV.W.0090.000000T0000Z-110904T0930Z/
NIAGARA NY-ERIE NY-
437 AM EDT SUN SEP 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM EDT
FOR NORTHERN ERIE AND NIAGARA COUNTIES...

AT 431 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS 
WERE LOCATED ALONG THE NIAGARA RIVER FROM BUFFALO TO 
YOUNGSTOWN...MOVING NORTHEAST AT 45 MPH. STRONG GUSTY WINDS EXTEND 
OUT AHEAD OF THIS LINE...BEFORE THE RAIN EVEN STARTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
SUNDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4313 7906 4324 7907 4337 7848 4272 7848
      4266 7869 4269 7904 4269 7905 4275 7894
      4274 7892 4279 7886 4294 7892 4299 7903
      4306 7901 4307 7908
TIME...MOT...LOC 0835Z 245DEG 37KT 4331 7890 4281 7888

$$

APFFEL

319 
WWUS51 KBUF 040906
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
506 AM EDT SUN SEP 4 2011

NYC029-063-040916-
/O.CAN.KBUF.SV.W.0090.000000T0000Z-110904T0930Z/
NIAGARA NY-ERIE NY-
506 AM EDT SUN SEP 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ERIE AND NIAGARA
COUNTIES IS CANCELLED...

AT 506 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
SUNDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4313 7906 4324 7907 4337 7848 4272 7848
      4266 7869 4269 7904 4269 7905 4275 7894
      4274 7892 4279 7886 4294 7892 4299 7903
      4306 7901 4307 7908
TIME...MOT...LOC 0906Z 245DEG 37KT 4342 7849 4292 7848

$$

APFFEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 8:59 PM EDT	Special Weather Statement	BUF	Allegany	46 min
Sep 3, 9:04 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	41 min
Sep 4, 3:00 AM EDT	Special Marine Warning	BUF		90 min
Sep 4, 3:21 AM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	54 min
Sep 4, 3:39 AM EDT	Special Marine Warning	BUF		81 min
Sep 4, 3:49 AM EDT	Special Marine Warning	BUF		56 min
Sep 4, 3:55 AM EDT	Special Weather Statement	BUF	Erie	65 min
Sep 4, 4:11 AM EDT	Special Marine Warning	BUF		61 min
Sep 4, 4:41 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Monroe, Niagara, Orleans	45 min
Sep 4, 4:46 AM EDT	Special Marine Warning	BUF		70 min
Sep 4, 5:20 AM EDT	Special Weather Statement	BUF	Chautauqua	40 min
Sep 4, 6:40 AM EDT	Special Marine Warning	BUF		80 min
Sep 4, 7:31 AM EDT	Special Weather Statement	BUF	Jefferson	44 min
Sep 4, 7:57 AM EDT	Special Marine Warning	BUF		63 min
Sep 4, 3:41 PM EDT	Special Marine Warning	BUF		64 min
Sep 4, 4:53 PM EDT	Special Weather Statement	BUF	Allegany, Livingston, Ontario, Wyoming	67 min

Nearby

Severe Thunderstorm Warnings in New York, 2011 Every severe thunderstorm warning in 2011

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.