Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 50, NWS Buffalo, NY

July 25, 2009Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 25, 2009, 3:32 PM EDT for Erie County, Niagara County, New York. It was in force for 58 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: Jul 25, 2009, 3:32 PM EDT (19:32 UTC)
Expired: Jul 25, 2009, 4:30 PM EDT
In force: 58 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 16 km from the middle of the area, began a volume at 19:32 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
Jul 25, 4:10 PM EDT	TSTM WND DMG	3 Ne North Tonawanda, NY	TREES DOWN
Jul 25, 4:16 PM EDT	HAIL 0.75	Cheektowaga, NY	ON OFFICIAL BUF METAR OB AT 2016Z
Jul 25, 4:17 PM EDT	HAIL 1	Cheektowaga, NY	1 INCH HAIL AT BUF NWS FORECAST OFFICE
Jul 25, 4:25 PM EDT	HAIL 0.88	Harris Hill, NY
Jul 25, 4:33 PM EDT	HAIL 0.88	Clarence Center, NY

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, 7.5 hours before the alert went out and 19 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1504 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 138 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 251932
SVRBUF
NYC029-063-252030-
/O.NEW.KBUF.SV.W.0050.090725T1932Z-090725T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
332 PM EDT SAT JUL 25 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 430 PM EDT

* AT 328 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12     
  MILES SOUTHWEST OF DOWNTOWN BUFFALO AND MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LACKAWANNA AND BUFFALO BY 400 PM EDT...
  CHEEKTOWAGA AND WILLIAMSVILLE BY 410 PM EDT...
  
LAT...LON 4271 7905 4275 7892 4279 7887 4285 7887
      4295 7893 4295 7895 4299 7903 4302 7904
      4307 7899 4308 7903 4325 7866 4278 7848
      4266 7906
TIME...MOT...LOC 1930Z 240DEG 31KT 4278 7917

$$

SFM

1 follow-up statement

000 
WWUS51 KBUF 252000
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
400 PM EDT SAT JUL 25 2009

NYC029-063-252030-
/O.CON.KBUF.SV.W.0050.000000T0000Z-090725T2030Z/
NIAGARA NY-ERIE NY-
400 PM EDT SAT JUL 25 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN ERIE AND SOUTH CENTRAL NIAGARA COUNTIES...

AT 359 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED OVER BUFFALO WITH ABNOTHER CELL OVER GRAND ISLAND...MOVING 
NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SLOAN BY 405 PM EDT...
  CHEEKTOWAGA BY 410 PM EDT...
  WILLIAMSVILLE BY 415 PM EDT...
  HARRIS HILL BY 420 PM EDT...
  CLARENCE CENTER BY 425 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 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 900 PM EDT
SATURDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4278 7848 4279 7887 4285 7887 4295 7893
      4295 7895 4299 7903 4302 7904 4307 7899
      4308 7903 4325 7866
TIME...MOT...LOC 2000Z 238DEG 29KT 4290 7886

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:05 PM EDT	Special Marine Warning	BUF		30 min
Jul 25, 3:21 PM EDT	Special Marine Warning	BUF		54 min
Jul 25, 4:11 PM EDT	Tornado Warning	BUF	Erie	18 min
Jul 25, 4:26 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	64 min
Jul 25, 4:40 PM EDT	Special Marine Warning	BUF		65 min
Jul 25, 5:03 PM EDT	Tornado Warning	BUF	Genesee, Monroe, Orleans	42 min
Jul 25, 5:14 PM EDT	Special Marine Warning	BUF		91 min
Jul 25, 5:25 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans	65 min
Jul 25, 5:46 PM EDT	Tornado Warning	BUF	Monroe	44 min
Jul 25, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans	43 min
Jul 25, 6:56 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	64 min
Jul 25, 6:58 PM EDT	Special Marine Warning	BUF		92 min

Nearby

Severe Thunderstorm Warnings in New York, 2009 Every 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.