Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 103, NWS Buffalo, NY

August 25, 2007Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 25, 2007, 5:56 PM EDT for Allegany County, New York. It was in force for 51 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: Aug 25, 2007, 5:56 PM EDT (21:56 UTC)
Expired: Aug 25, 2007, 6:47 PM EDT
In force: 51 min
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 108 km from the middle of the area, began a volume at 21:59 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

Time	Report	Where	Remark
Aug 25, 6:05 PM EDT	TSTM WND DMG	Bolivar, NY	NUMEROUS TREES DOWN.
Aug 25, 6:15 PM EDT	TSTM WND DMG	Scio, NY	NUMEROUS TREES DOWN.
Aug 25, 6:15 PM EDT	TSTM WND DMG	Wellsville, NY	NUMEROUS TREES DOWN.
Aug 25, 6:30 PM EDT	TSTM WND DMG	Alfred, NY	NUMEROUS TREES 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
Aug 25, 1:58 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.9 hours before the alert went out and 104 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: 239 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 252156
SVRBUF
NYC003-252300-
/O.NEW.KBUF.SV.W.0103.070825T2156Z-070825T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
556 PM EDT SAT AUG 25 2007

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGANY COUNTY IN WESTERN NEW YORK

* UNTIL 700 PM EDT

* AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 13
  MILES SOUTH OF CUBA...OR ABOUT NEAR OLEAN...AND MOVING EAST AT 45
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BOLIVAR BY 610 PM EDT...
  WELLSVILLE BY 620 PM EDT...

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.

LAT...LON 4200 7775 4200 7831 4217 7831 4225 7830
      4238 7773
TIME...MOT...LOC 2156Z 257DEG 43KT 4204 7835

$$

HITCHCOCK

2 follow-up statements

000 
WWUS51 KBUF 252223
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
622 PM EDT SAT AUG 25 2007

NYC003-252300-
/O.CON.KBUF.SV.W.0103.000000T0000Z-070825T2300Z/
ALLEGANY NY-
622 PM EDT SAT AUG 25 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR ALLEGANY COUNTY...

AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WELLSVILLE...MOVING EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ANDOVER BY 630 PM EDT...
  ALFRED BY 635 PM EDT...

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.

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.

LAT...LON 4201 7776 4200 7778 4201 7809 4216 7812
      4231 7801 4238 7773 4231 7774 4230 7773
TIME...MOT...LOC 2222Z 257DEG 43KT 4210 7794

$$

HITCHCOCK

000 
WWUS51 KBUF 252247
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
647 PM EDT SAT AUG 25 2007

NYC003-252257-
/O.CAN.KBUF.SV.W.0103.000000T0000Z-070825T2300Z/
ALLEGANY NY-
647 PM EDT SAT AUG 25 2007

...THE SEVERE THUNDERSTORM WARNING FOR ALLEGANY COUNTY IS
CANCELLED...

AT 647 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE 
THUNDERSTORM HAD EXITED THE WARNED AREA...THUS THE WARNING HAS BEEN 
CANCELLED.

PLEASE REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT FOR RELAY TO 
THE NATIONAL WEATHER SERVICE IN BUFFALO.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT 
SATURDAY EVENING FOR PORTIONS OF WESTERN NEW YORK.

LAT...LON 4201 7776 4200 7778 4201 7809 4216 7812
      4231 7801 4238 7773 4231 7774 4230 7773
TIME...MOT...LOC 2247Z 257DEG 43KT 4216 7755

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 9:16 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	59 min
Aug 24, 9:30 PM EDT	Severe Thunderstorm Warning	BUF	Livingston	35 min
Aug 24, 11:01 PM EDT	Special Marine Warning	BUF		89 min
Aug 24, 11:08 PM EDT	Special Marine Warning	BUF		42 min
Aug 24, 11:13 PM EDT	Special Marine Warning	BUF		64 min
Aug 24, 11:52 PM EDT	Special Marine Warning	BUF		83 min
Aug 25, 2:17 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	58 min
Aug 25, 2:39 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	66 min
Aug 25, 5:39 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus	36 min

Nearby

Severe Thunderstorm Warnings in New York, 2007 Every severe thunderstorm warning in 2007

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.