Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 21, NWS Buffalo, NY

June 26, 2009Allegany County, Livingston County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 26, 2009, 12:17 PM EDT for Allegany County, Livingston County, New York. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 26, 2009, 12:17 PM EDT (16:17 UTC)
Expired: Jun 26, 2009, 12:54 PM EDT
In force: 37 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Livingston County, NY

The radar

The Buffalo radar (KBUF), 86 km from the middle of the area, began a volume at 16:16 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.3 hours before the alert went out and 83 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: 974 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 717 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 261617
SVRBUF
NYC003-051-261715-
/O.NEW.KBUF.SV.W.0021.090626T1617Z-090626T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1217 PM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 115 PM EDT

* AT 1216 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 12
  MILES NORTH OF BELFAST...OR 18 MILES WEST OF DANSVILLE...AND MOVING
  EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DANSVILLE BY 1255 PM EDT...

LAT...LON 4230 7816 4253 7816 4253 7804 4259 7804
      4259 7801 4261 7800 4260 7749 4258 7750
      4258 7765 4254 7765 4253 7771 4229 7773
TIME...MOT...LOC 1617Z 274DEG 23KT 4251 7804

$$

ZAFF

2 follow-up statements

000 
WWUS51 KBUF 261636
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1236 PM EDT FRI JUN 26 2009

NYC003-051-261715-
/O.CON.KBUF.SV.W.0021.000000T0000Z-090626T1715Z/
ALLEGANY NY-LIVINGSTON NY-
1236 PM EDT FRI JUN 26 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR SOUTHERN LIVINGSTON AND NORTHEASTERN ALLEGANY COUNTIES...

AT 1235 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 OSSIAN CENTER...OR 9 MILES SOUTHWEST OF DANSVILLE...
MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  DANSVILLE BY 1250 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FRIDAY
EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4229 7773 4230 7794 4256 7796 4260 7749
      4258 7750 4258 7765 4254 7765 4253 7771
TIME...MOT...LOC 1637Z 269DEG 29KT 4251 7783

$$

ZAFF

000 
WWUS51 KBUF 261654
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1254 PM EDT FRI JUN 26 2009

NYC003-051-261704-
/O.CAN.KBUF.SV.W.0021.000000T0000Z-090626T1715Z/
ALLEGANY NY-LIVINGSTON NY-
1254 PM EDT FRI JUN 26 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LIVINGSTON AND
NORTHEASTERN ALLEGANY COUNTIES IS CANCELLED...

AT 1254 PM 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 700 PM EDT FRIDAY
EVENING FOR WESTERN NEW YORK.

LAT...LON 4229 7773 4230 7794 4256 7796 4260 7749
      4258 7750 4258 7765 4254 7765 4253 7771
TIME...MOT...LOC 1654Z 269DEG 29KT 4243 7765

$$

ZAFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:01 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Wyoming	31 min
Jun 25, 8:10 PM EDT	Special Marine Warning	BUF		37 min
Jun 25, 8:14 PM EDT	Special Marine Warning	BUF		31 min
Jun 26, 5:43 AM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	62 min
Jun 26, 12:10 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe	65 min
Jun 26, 12:28 PM EDT	Special Marine Warning	BUF		44 min
Jun 26, 12:41 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Orleans, Wayne	64 min
Jun 26, 12:50 PM EDT	Special Marine Warning	BUF		55 min
Jun 26, 1:06 PM EDT	Special Marine Warning	BUF		84 min
Jun 26, 1:09 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	66 min
Jun 26, 1:32 PM EDT	Flash Flood Warning	BUF	Monroe, Ontario, Wayne	3 hr
Jun 26, 1:34 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Monroe, Ontario, Wayne	56 min
Jun 26, 1:34 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	29 min
Jun 26, 1:47 PM EDT	Flash Flood Warning	BUF	Allegany	3 hr
Jun 26, 2:23 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario	67 min
Jun 26, 2:47 PM EDT	Special Marine Warning	BUF		88 min
Jun 26, 3:11 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	49 min
Jun 26, 3:46 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	31 min
Jun 26, 4:13 PM EDT	Special Marine Warning	BUF		30 min
Jun 26, 4:39 PM EDT	Flash Flood Warning	BUF	Wyoming	87 min
Jun 26, 5:27 PM EDT	Special Marine Warning	BUF		32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.