Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 85, NWS Buffalo, NY

August 16, 20194 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 16, 2019, 5:37 PM EDT for 4 counties in New York. It was in force for 53 min. 1 report 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 16, 2019, 5:37 PM EDT (21:37 UTC)
Expired: Aug 16, 2019, 6:30 PM EDT
In force: 53 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 75 km from the middle of the area, began a volume at 21:38 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
Aug 16, 6:00 PM EDT	TSTM WND DMG	Avon, NY	TREE DOWN WHICH TOOK OUT ELECTRICAL WIRES AND THEN CAUGHT ON FIRE.

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, 9.6 hours before the alert went out and 72 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: 121 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

751 
WUUS51 KBUF 162137
SVRBUF
NYC037-051-055-121-162230-
/O.NEW.KBUF.SV.W.0085.190816T2137Z-190816T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
537 PM EDT Fri Aug 16 2019

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Wyoming County in western New York...
  Northern Livingston County in western New York...
  Southwestern Monroe County in western New York...
  Southeastern Genesee County in western New York...

* Until 630 PM EDT..

* At 537 PM EDT, a severe thunderstorm was located over Pavilion 
  and 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...
  Geneseo, Brighton, Henrietta, Le Roy, Avon, Honeoye Falls,
  Pavilion, Caledonia, Lima and Scottsville.

 This includes the following highways...
 Interstate 390 between exits 8 and 12.
 Interstate 90 between exits 47 and 46.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4281 7812 4305 7813 4310 7760 4285 7758
      4285 7759 4280 7759
TIME...MOT...LOC 2137Z 262DEG 19KT 4289 7798 

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

Reynolds

2 follow-up statements

055 
WWUS51 KBUF 162202
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
602 PM EDT Fri Aug 16 2019

NYC037-051-055-121-162230-
/O.CON.KBUF.SV.W.0085.000000T0000Z-190816T2230Z/
Wyoming NY-Livingston NY-Monroe NY-Genesee NY-
602 PM EDT Fri Aug 16 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHEASTERN WYOMING...NORTHERN LIVINGSTON...SOUTHWESTERN MONROE
AND SOUTHEASTERN GENESEE COUNTIES...

At 601 PM EDT, a severe thunderstorm was located near Avon and 
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...
Geneseo, Le Roy, Avon, Honeoye Falls, Caledonia, Lima, Scottsville,
Rush, York and Livonia.

 This includes Interstate 390 between exits 8 and 11.
 
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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4281 7799 4301 7800 4304 7760 4285 7758
      4285 7759 4280 7759
TIME...MOT...LOC 2201Z 262DEG 19KT 4291 7781 

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

Reynolds

235 
WWUS51 KBUF 162231
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
631 PM EDT Fri Aug 16 2019

NYC037-051-055-121-162241-
/O.EXP.KBUF.SV.W.0085.000000T0000Z-190816T2230Z/
Wyoming NY-Livingston NY-Monroe NY-Genesee NY-
631 PM EDT Fri Aug 16 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING...
NORTHERN LIVINGSTON...SOUTHWESTERN MONROE AND SOUTHEASTERN GENESEE
COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

LAT...LON 4281 7799 4301 7800 4304 7760 4285 7758
      4285 7759 4280 7759
TIME...MOT...LOC 2231Z 262DEG 19KT 4293 7762 

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 8:55 PM EDT	Special Weather Statement	BUF	Wyoming	35 min
Aug 15, 9:00 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	25 min
Aug 15, 9:20 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	55 min
Aug 15, 10:13 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	31 min
Aug 16, 12:37 PM EDT	Special Weather Statement	BUF	Wyoming	38 min
Aug 16, 2:01 PM EDT	Special Weather Statement	BUF	Ontario	44 min
Aug 16, 2:49 PM EDT	Special Weather Statement	BUF	Ontario	26 min
Aug 16, 4:42 PM EDT	Special Weather Statement	BUF	Genesee	63 min
Aug 16, 5:03 PM EDT	Special Weather Statement	BUF	Genesee	57 min
Aug 16, 5:13 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	62 min
Aug 16, 5:15 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	60 min
Aug 16, 5:52 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Orleans	53 min
Aug 16, 5:58 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	47 min
Aug 16, 6:07 PM EDT	Special Marine Warning	BUF		53 min
Aug 16, 6:41 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	64 min
Aug 16, 7:21 PM EDT	Special Weather Statement	BUF	Wayne	54 min
Aug 16, 7:55 PM EDT	Special Weather Statement	BUF	Cayuga	35 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.