Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 96, NWS Buffalo, NY

August 18, 2019Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 18, 2019, 3:36 PM EDT for Ontario County, New York. It was in force for 43 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: Aug 18, 2019, 3:36 PM EDT (19:36 UTC)
Expired: Aug 18, 2019, 4:19 PM EDT
In force: 43 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Ontario County, NY

The radar

The Binghamton radar (KBGM), 118 km from the middle of the area, began a volume at 19:40 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
Aug 18, 3:41 PM EDT	TSTM WND DMG	3 Sse Phelps, NY	MULTIPLE REPORTS OF TREES AND WIRES DOWN.
Aug 18, 3:56 PM EDT	TSTM WND DMG	Geneva, NY	MULTIPLE REPORTS OF TREES AND WIRES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.6 hours before the alert went out and 128 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: 1370 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

584 
WUUS51 KBUF 181936
SVRBUF
NYC069-182030-
/O.NEW.KBUF.SV.W.0096.190818T1936Z-190818T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
336 PM EDT Sun Aug 18 2019

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Ontario County in western New York...

* Until 430 PM EDT..

* At 336 PM EDT, a severe thunderstorm was located near Rushville, or
  near Canandaigua, moving east at 20 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...
  Geneva, Canandaigua, Phelps, Rushville, Gorham, Seneca Castle,
  Seneca Lake State Park, Cheshire, Cottage City and Hall.

 This includes Interstate 90 near exit 42.
 
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 4290 7733 4297 7697 4287 7696 4286 7698
      4284 7697 4276 7697 4276 7731 4273 7734
TIME...MOT...LOC 1936Z 259DEG 16KT 4284 7719 

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

Hitchcock

2 follow-up statements

715 
WWUS51 KBUF 181952
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
352 PM EDT Sun Aug 18 2019

NYC069-182030-
/O.CON.KBUF.SV.W.0096.000000T0000Z-190818T2030Z/
Ontario NY-
352 PM EDT Sun Aug 18 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN ONTARIO COUNTY...

At 350 PM EDT, a severe thunderstorm was located 5 miles west of 
Geneva, moving east at 20 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...
Geneva, Phelps, Gorham, Seneca Castle, Seneca Lake State Park, Hall 
and West Junius.

 This includes Interstate 90 near exit 42.
 
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 4292 7722 4297 7697 4287 7696 4286 7698
      4284 7697 4276 7697 4276 7723
TIME...MOT...LOC 1950Z 259DEG 16KT 4285 7710 

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

Hitchcock

557 
WWUS51 KBUF 182019
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
419 PM EDT Sun Aug 18 2019

NYC069-182029-
/O.CAN.KBUF.SV.W.0096.000000T0000Z-190818T2030Z/
Ontario NY-
419 PM EDT Sun Aug 18 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ONTARIO COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with additional storms moving across the area.

LAT...LON 4292 7722 4297 7697 4287 7696 4286 7698
      4284 7697 4276 7697 4276 7723
TIME...MOT...LOC 2016Z 259DEG 16KT 4287 7693 

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 5:49 AM EDT	Special Marine Warning	BUF		86 min
Aug 18, 6:13 AM EDT	Special Weather Statement	BUF	Erie	92 min
Aug 18, 7:15 AM EDT	Special Weather Statement	BUF	Genesee	30 min
Aug 18, 7:35 AM EDT	Special Weather Statement	BUF	Livingston, Wyoming	40 min
Aug 18, 8:04 AM EDT	Special Marine Warning	BUF		56 min
Aug 18, 8:04 AM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	41 min
Aug 18, 8:46 AM EDT	Special Weather Statement	BUF	Chautauqua	44 min
Aug 18, 3:02 PM EDT	Special Weather Statement	BUF	Cayuga	43 min
Aug 18, 3:14 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	46 min
Aug 18, 3:16 PM EDT	Special Weather Statement	BUF	Livingston, Ontario, Wayne, Wyoming	44 min
Aug 18, 4:16 PM EDT	Flash Flood Warning	BUF	Ontario	3 hr
Aug 18, 4:43 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	62 min
Aug 18, 5:54 PM EDT	Special Weather Statement	BUF	Lewis	51 min
Aug 18, 6:57 PM EDT	Special Weather Statement	BUF	Livingston	48 min
Aug 18, 7:03 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Ontario	42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.