Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 76, NWS Buffalo, NY

August 15, 2019Cattaraugus County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 15, 2019, 3:55 PM EDT for Cattaraugus County, New York. It was in force for 50 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: Aug 15, 2019, 3:55 PM EDT (19:55 UTC)
Expired: Aug 15, 2019, 4:45 PM EDT
In force: 50 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 94 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 91 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: 1667 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

630 
WUUS51 KBUF 151955
SVRBUF
NYC009-152045-
/O.NEW.KBUF.SV.W.0076.190815T1955Z-190815T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
355 PM EDT Thu Aug 15 2019

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Cattaraugus County in western New York...

* Until 445 PM EDT..

* At 355 PM EDT, a severe thunderstorm was located near Salamanca,
  moving east at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Olean, Salamanca, Allegany State Park, Allegany, St. Bonaventure,
  Weston Mills, Hinsdale, Great Valley, Carrollton and Ischua.

 This includes Interstate 86 between exits 20 and 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4203 7875 4220 7876 4228 7838 4214 7831
      4201 7836
TIME...MOT...LOC 1955Z 267DEG 20KT 4210 7865 

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

Hitchcock

1 follow-up statement

635 
WWUS51 KBUF 152013
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
413 PM EDT Thu Aug 15 2019

NYC009-152045-
/O.CON.KBUF.SV.W.0076.000000T0000Z-190815T2045Z/
Cattaraugus NY-
413 PM EDT Thu Aug 15 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN CATTARAUGUS COUNTY...

At 413 PM EDT, a severe thunderstorm was located over Allegany, or
over Olean, moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Olean, Allegany State Park, Allegany, Weston Mills, St. Bonaventure,
Hinsdale, Carrollton, Vandalia, Haskell Flats and Rock City Park.

 This includes Interstate 86 between exits 23 and 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4203 7870 4217 7866 4225 7837 4214 7831
      4201 7836
TIME...MOT...LOC 2013Z 267DEG 24KT 4211 7847 

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

Hitchcock

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 2:48 PM EDT	Special Weather Statement	BUF	Cattaraugus	42 min
Aug 15, 3:18 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	57 min
Aug 15, 3:39 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Wyoming	51 min
Aug 15, 4:21 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	54 min
Aug 15, 4:33 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	57 min
Aug 15, 4:43 PM EDT	Special Weather Statement	BUF	Monroe	47 min
Aug 15, 4:45 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario	27 min

Nearby

Severe Thunderstorm Warnings in New York, 2019 Every severe thunderstorm warning in 2019

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.