Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 52, NWS Buffalo, NY

July 25, 2009Genesee County, Monroe County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 25, 2009, 5:25 PM EDT for Genesee County, Monroe County, Orleans County, New York. It was in force for 65 min. 4 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, 5:25 PM EDT (21:25 UTC)
Expired: Jul 25, 2009, 6:30 PM EDT
In force: 65 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Genesee County, NY, Monroe County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 82 km from the middle of the area, began a volume at 21:25 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, 5:55 PM EDT	TORNADO	Hilton, NY	EFO LENGTH 0.75MI / WIDTH 30 YDS
Jul 25, 6:00 PM EDT	TSTM WND DMG	Hilton, NY	TREE DOWN ON HOUSE...SEVERAL OTHER TREES DOWN...YARD FURNITURE DAMAGED.
Jul 25, 6:25 PM EDT	TSTM WND DMG	Hilton, NY	TREES AND WIRES DOWN
Jul 25, 6:29 PM EDT	TSTM WND DMG	Brockport, NY	TREES AND WIRES DOWN

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
Jul 25, 3:50 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.4 hours before the alert went out and 80 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 252125
SVRBUF
NYC037-055-073-252230-
/O.NEW.KBUF.SV.W.0052.090725T2125Z-090725T2230Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK
  NORTHWESTERN MONROE COUNTY IN WESTERN NEW YORK
  EASTERN ORLEANS COUNTY IN WESTERN NEW YORK

* UNTIL 630 PM EDT

* AT 524 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 6 MILES
  SOUTHWEST OF HOLLEY...OR 8 MILES SOUTHEAST OF ALBION...AND MOVING
  NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOLLEY BY 540 PM EDT...
  BROCKPORT BY 545 PM EDT...
  HILTON BY 605 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME 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 900 PM EDT
SATURDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4337 7794 4336 7784 4334 7781 4335 7776
      4334 7772 4324 7758 4307 7801 4331 7806
      4338 7799
TIME...MOT...LOC 2125Z 231DEG 23KT 4315 7809

$$

RSH

2 follow-up statements

000 
WWUS51 KBUF 252156
SVSBUF

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

NYC037-055-073-252230-
/O.CON.KBUF.SV.W.0052.000000T0000Z-090725T2230Z/
GENESEE NY-MONROE NY-ORLEANS NY-
556 PM EDT SAT JUL 25 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EASTERN ORLEANS...NORTHWESTERN MONROE AND NORTHEASTERN GENESEE
COUNTIES...

AT 555 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 NEAR HILTON...MOVING NORTHEAST AT 25 MPH. ANOTHER LINE OF 
STORMS EXTENDED FROM NEAR HOLLEY TO THE SOUTHEAST CORNER OF ORLEANS 
COUNTY. ALL OF THIS ACTIVITY IS MOVING TO THE NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRADDOCK BAY BY 605 PM 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 900 PM EDT
SATURDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4337 7794 4336 7784 4334 7781 4335 7776
      4334 7772 4324 7758 4307 7801 4331 7806
      4338 7799
TIME...MOT...LOC 2155Z 231DEG 23KT 4330 7782

$$

RSH

000 
WWUS51 KBUF 252208
SVSBUF

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

NYC037-055-073-252230-
/O.CON.KBUF.SV.W.0052.000000T0000Z-090725T2230Z/
GENESEE NY-MONROE NY-ORLEANS NY-
608 PM EDT SAT JUL 25 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EASTERN ORLEANS...NORTHWESTERN MONROE AND NORTHEASTERN GENESEE
COUNTIES...

AT 608 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
THIS STORM WAS LOCATED NEAR BROCKPORT...MOVING NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HILTON BY 625 PM EDT...
  BRADDOCK BAY BY 630 PM 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 900 PM EDT
SATURDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4337 7794 4336 7784 4334 7781 4335 7776
      4334 7772 4324 7758 4307 7801 4331 7806
      4338 7799
TIME...MOT...LOC 2209Z 232DEG 22KT 4324 7794

$$

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, 3:32 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	58 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, 5:46 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.