Alert archive / New York / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 18, NWS Buffalo, NY

June 20, 20164 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 20, 2016, 10:39 PM EDT for 4 counties in New York. It was in force for 51 min. 8 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: Jun 20, 2016, 10:39 PM EDT (02:39 UTC)
Expired: Jun 20, 2016, 11:30 PM EDT
In force: 51 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Allegany County, NY, Cattaraugus County, NY, Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 87 km from the middle of the area, began a volume at 02:38 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
Jun 20, 10:48 PM EDT	TSTM WND DMG	Groveland, NY	TREE DOWN
Jun 20, 10:58 PM EDT	TSTM WND DMG	Bliss, NY	TREES AND WIRES DOWN. TIME ESTIMATED FROM RADAR
Jun 20, 10:58 PM EDT	HAIL 1	Silver Springs, NY
Jun 20, 11:06 PM EDT	TSTM WND DMG	Pike, NY	TREES AND WIRES DOWN. TIME ESTIAMTED FROM RADAR
Jun 20, 11:11 PM EDT	TSTM WND DMG	Springwater, NY	TREE DOWN
Jun 20, 11:16 PM EDT	TSTM WND DMG	Gainesville, NY	TREES AND WIRES DOWN. TIME ESTIMATED FROM RADAR.
Jun 20, 11:25 PM EDT	TSTM WND DMG	Nunda, NY	TREES DOWN
Jun 20, 11:31 PM EDT	TSTM WND DMG	Eagle, NY	TREES AND WIRES DOWN. TIME ESTIMATED FROM RADAR

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
Jun 20, 8:06 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 2.7 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: 874 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1626 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

554 
WUUS51 KBUF 210239
SVRBUF
NYC003-009-051-121-210330-
/O.NEW.KBUF.SV.W.0018.160621T0239Z-160621T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1039 PM EDT MON JUN 20 2016

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  NORTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  NORTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
  SOUTHERN WYOMING COUNTY IN WESTERN NEW YORK...

* UNTIL 1130 PM EDT

* AT 1038 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LETCHWORTH
  STATE PARK...MOVING SOUTHEAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  GENESEO...DANSVILLE...LETCHWORTH STATE PARK...PERRY...MOUNT MORRIS...
  CONESUS...ARCADE AND PORTAGEVILLE.

THIS INCLUDES INTERSTATE 390 BETWEEN EXITS 4 AND 7.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4255 7844 4280 7782 4269 7760 4267 7760
      4267 7757 4263 7749 4259 7749 4258 7752
      4258 7766 4253 7766 4253 7772 4248 7772
      4245 7829
TIME...MOT...LOC 0238Z 292DEG 40KT 4266 7803 

HAIL...1.00IN
WIND...60MPH
 
$$

APFFEL

2 follow-up statements

247 
WWUS51 KBUF 210304
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1104 PM EDT MON JUN 20 2016

NYC003-009-051-121-210330-
/O.CON.KBUF.SV.W.0018.000000T0000Z-160621T0330Z/
LIVINGSTON NY-CATTARAUGUS NY-ALLEGANY NY-WYOMING NY-
1104 PM EDT MON JUN 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR SOUTHERN LIVINGSTON...NORTHEASTERN CATTARAUGUS...NORTHWESTERN
ALLEGANY AND SOUTHERN WYOMING COUNTIES...

AT 1104 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PORTAGEVILLE...
OR NEAR LETCHWORTH STATE PARK...MOVING SOUTHEAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
DANSVILLE...LETCHWORTH STATE PARK...ARCADE...PORTAGEVILLE...GROVELAND...
SPRINGWATER...NUNDA AND EAGLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4255 7844 4269 7802 4269 7760 4267 7760
      4267 7757 4263 7749 4259 7749 4258 7752
      4258 7766 4253 7766 4253 7772 4248 7772
      4245 7829
TIME...MOT...LOC 0304Z 293DEG 36KT 4260 7810 

HAIL...1.00IN
WIND...60MPH
 
$$

APFFEL

513 
WWUS51 KBUF 210329
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1129 PM EDT MON JUN 20 2016

NYC003-009-051-121-210338-
/O.EXP.KBUF.SV.W.0018.000000T0000Z-160621T0330Z/
LIVINGSTON NY-CATTARAUGUS NY-ALLEGANY NY-WYOMING NY-
1129 PM EDT MON JUN 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LIVINGSTON...
NORTHEASTERN CATTARAUGUS...NORTHWESTERN ALLEGANY AND SOUTHERN WYOMING
COUNTIES WILL EXPIRE AT 1130 PM EDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT FOR
WESTERN NEW YORK.

LAT...LON 4255 7844 4269 7802 4269 7760 4267 7760
      4267 7757 4263 7749 4259 7749 4258 7752
      4258 7766 4253 7766 4253 7772 4248 7772
      4245 7829
TIME...MOT...LOC 0327Z 292DEG 40KT 4260 7810 

$$

APFFEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:57 PM EDT	Special Marine Warning	BUF		93 min
Jun 20, 9:04 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	56 min
Jun 20, 9:20 PM EDT	Special Marine Warning	BUF		55 min
Jun 20, 9:26 PM EDT	Special Weather Statement	BUF	Erie	34 min
Jun 20, 9:30 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Wyoming	45 min
Jun 20, 9:43 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	62 min
Jun 20, 9:53 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	37 min
Jun 20, 10:11 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Wyoming	49 min
Jun 20, 10:26 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	64 min
Jun 20, 10:33 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	27 min
Jun 20, 10:36 PM EDT	Special Marine Warning	BUF		39 min
Jun 20, 10:53 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	52 min
Jun 20, 10:58 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Livingston, Wyoming	47 min
Jun 20, 11:13 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	37 min
Jun 20, 11:20 PM EDT	Flash Flood Warning	BUF	Erie, Wyoming	3 hr
Jun 20, 11:34 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston, Wyoming	41 min
Jun 20, 11:43 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	23 min
Jun 21, 12:15 AM EDT	Severe Thunderstorm Warning	BUF	Allegany	30 min

Nearby

Severe Thunderstorm Warnings in New York, 2016 Every severe thunderstorm warning in 2016

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.