Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 34, NWS Buffalo, NY

May 30, 20175 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 30, 2017, 1:34 PM EDT for 5 counties in New York. It was in force for 30 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: May 30, 2017, 1:34 PM EDT (17:34 UTC)
Expired: May 30, 2017, 2:04 PM EDT
In force: 30 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, Erie County, NY, Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 65 km from the middle of the area, began a volume at 17:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 30, 12:39 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.6 hours before the alert went out and 61 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1274 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

400 
WUUS51 KBUF 301734
SVRBUF
NYC003-009-029-051-121-301815-
/O.NEW.KBUF.SV.W.0034.170530T1734Z-170530T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
134 PM EDT TUE MAY 30 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southern Wyoming County in western New York...
  Northeastern Cattaraugus County in western New York...
  Southeastern Erie County in western New York...
  Southwestern Livingston County in western New York...
  Northwestern Allegany County in western New York...

* Until 215 PM EDT.

* At 133 PM EDT, a severe thunderstorm was located near Springville,
  or 20 miles south of East Aurora, moving east at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Letchworth State Park, Springville, Perry, Mount Morris, Arcade,
  Houghton, Chaffee and East Concord.

This includes Interstate 390 between exits 6 and 7.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4235 7865 4256 7873 4278 7786 4251 7772
      4249 7772
TIME...MOT...LOC 1733Z 253DEG 36KT 4247 7857 

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

Mitchell

1 follow-up statement

828 
WWUS51 KBUF 301804
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
204 PM EDT TUE MAY 30 2017

NYC003-009-029-051-121-301814-
/O.CAN.KBUF.SV.W.0034.000000T0000Z-170530T1815Z/
Wyoming NY-Cattaraugus NY-Erie NY-Livingston NY-Allegany NY-
204 PM EDT TUE MAY 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WYOMING...
NORTHEASTERN CATTARAUGUS...SOUTHEASTERN ERIE...SOUTHWESTERN
LIVINGSTON AND NORTHWESTERN ALLEGANY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 800 PM EDT for
western New York.

LAT...LON 4235 7865 4256 7873 4278 7786 4251 7772
      4249 7772
TIME...MOT...LOC 1802Z 253DEG 36KT 4256 7817 

$$

Smith

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 1:14 AM EDT	Special Marine Warning	BUF		61 min
May 30, 1:52 AM EDT	Special Marine Warning	BUF		83 min
May 30, 1:05 PM EDT	Special Weather Statement	BUF	Allegany	25 min
May 30, 1:17 PM EDT	Special Weather Statement	BUF	Wayne	28 min
May 30, 1:18 PM EDT	Special Weather Statement	BUF	Ontario	27 min
May 30, 1:22 PM EDT	Special Weather Statement	BUF	Ontario	23 min
May 30, 1:32 PM EDT	Special Marine Warning	BUF		43 min
May 30, 1:41 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	49 min
May 30, 1:54 PM EDT	Special Weather Statement	BUF	Jefferson	36 min
May 30, 2:03 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	27 min
May 30, 2:10 PM EDT	Special Marine Warning	BUF		65 min
May 30, 2:10 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	50 min
May 30, 2:21 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	54 min
May 30, 3:13 PM EDT	Special Weather Statement	BUF	Ontario	32 min
May 30, 4:23 PM EDT	Special Weather Statement	BUF	Onondaga	22 min
May 30, 4:41 PM EDT	Special Weather Statement	BUF	Lewis	49 min

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every severe thunderstorm warning in 2017

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.