Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 8, NWS Buffalo, NY

May 9, 2009Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 9, 2009, 2:12 PM EDT for Wayne County, New York. It was in force for 40 min. 2 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: May 9, 2009, 2:12 PM EDT (18:12 UTC)
Expired: May 9, 2009, 2:52 PM EDT
In force: 40 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Wayne County, NY

The radar

The Ft Drum radar (KTYX), 123 km from the middle of the area, began a volume at 18:12 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
May 9, 2:15 PM EDT	HAIL 1	Walworth, NY
May 9, 2:20 PM EDT	HAIL 1	Walworth, NY

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
May 9, 12:43 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.2 hours before the alert went out and 139 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: 201 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 697 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 091812
SVRBUF
NYC117-091915-
/O.NEW.KBUF.SV.W.0008.090509T1812Z-090509T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
212 PM EDT SAT MAY 9 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 315 PM EDT

* AT 209 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 7 MILES
  SOUTHWEST OF ONTARIO...AND MOVING EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MARION BY 220 PM EDT...
  SODUS BY 225 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.

&&

LAT...LON 4326 7738 4329 7730 4330 7715 4328 7704
      4329 7698 4328 7697 4329 7697 4331 7691
      4332 7679 4335 7673 4312 7670 4305 7736
TIME...MOT...LOC 1811Z 257DEG 54KT 4315 7733

$$

HITCHCOCK

3 follow-up statements

000 
WWUS51 KBUF 091824
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
224 PM EDT SAT MAY 9 2009

NYC117-091915-
/O.CON.KBUF.SV.W.0008.000000T0000Z-090509T1915Z/
WAYNE NY-
224 PM EDT SAT MAY 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHERN WAYNE COUNTY...

AT 223 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WALWORTH...OR 11 MILES EAST OF WEBSTER...MOVING EAST AT
50 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SODUS BY 235 PM EDT...
  SODUS POINT BY 240 PM EDT...
  NORTH ROSE BY 245 PM EDT...
  WOLCOTT BY 250 PM EDT...
  RED CREEK BY 255 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. 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.

AT 220 PM EDT...A TRAINED WEATHER SPOTTER REPORTED QUARTER SIZED 
HAIL IN WALWORTH.

&&

LAT...LON 4309 7726 4325 7730 4330 7715 4328 7704
      4329 7698 4328 7697 4329 7697 4331 7691
      4332 7679 4335 7673 4312 7670
TIME...MOT...LOC 1823Z 260DEG 42KT 4316 7722

$$

HITCHCOCK

000 
WWUS51 KBUF 091840
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
240 PM EDT SAT MAY 9 2009

NYC117-091915-
/O.CON.KBUF.SV.W.0008.000000T0000Z-090509T1915Z/
WAYNE NY-
240 PM EDT SAT MAY 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHEASTERN WAYNE COUNTY...

AT 238 PM EDT...A 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 NORTH ROSE...MOVING EAST AT 50 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOLCOTT BY 245 PM EDT...
  RED CREEK BY 250 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.

&&

LAT...LON 4315 7699 4327 7700 4328 7697 4331 7691
      4332 7679 4335 7673 4317 7671
TIME...MOT...LOC 1840Z 255DEG 42KT 4322 7690

$$

HITCHCOCK

000 
WWUS51 KBUF 091852
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
252 PM EDT SAT MAY 9 2009

NYC117-091902-
/O.CAN.KBUF.SV.W.0008.000000T0000Z-090509T1915Z/
WAYNE NY-
252 PM EDT SAT MAY 9 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WAYNE COUNTY IS
CANCELLED...

AT 252 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN CANCELLED.

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

LAT...LON 4315 7699 4327 7700 4328 7697 4331 7691
      4332 7679 4335 7673 4317 7671
TIME...MOT...LOC 1852Z 255DEG 42KT 4325 7671

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 10:22 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	38 min
May 9, 4:07 AM EDT	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	20 hr
May 9, 4:27 AM EDT	Gale Warning	BUF		24 hr
May 9, 12:30 PM EDT	Special Marine Warning	BUF		2 hr
May 9, 12:38 PM EDT	Special Marine Warning	BUF		40 min
May 9, 1:12 PM EDT	Special Marine Warning	BUF		25 min
May 9, 1:18 PM EDT	Special Marine Warning	BUF		87 min
May 9, 1:28 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	46 min
May 9, 1:48 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	57 min
May 9, 2:49 PM EDT	Special Marine Warning	BUF		56 min
May 9, 3:22 PM EDT	Special Marine Warning	BUF		53 min
May 9, 4:45 PM EDT	Small Craft Advisory	BUF		33 hr

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.