Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 84, NWS Buffalo, NY

August 16, 2019Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 16, 2019, 5:15 PM EDT for Niagara County, New York. It was in force for 60 min. 3 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 16, 2019, 5:15 PM EDT (21:15 UTC)
Expired: Aug 16, 2019, 6:15 PM EDT
In force: 60 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Niagara County, NY

The radar

The Buffalo radar (KBUF), 22 km from the middle of the area, began a volume at 21:14 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, 5:43 PM EDT	TSTM WND DMG	Cambria Center, NY	MULTIPLE TREES DOWN AND POWERLINES.
Aug 16, 5:45 PM EDT	HAIL 1.5	1 Nw Lockport, NY	QUARTER TO PING PONG SIZE HAIL REPORTED.
Aug 16, 5:52 PM EDT	HAIL 1	Lockport, NY

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, 9.3 hours before the alert went out and 24 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.

295 
WUUS51 KBUF 162115
SVRBUF
NYC063-162215-
/O.NEW.KBUF.SV.W.0084.190816T2115Z-190816T2215Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Central Niagara County in western New York...

* Until 615 PM EDT..

* At 514 PM EDT, a severe thunderstorm was located over Lewiston, or
  near Niagara Falls, moving east at 10 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...
  Lockport, Newfane, Lewiston, Sanborn, Cambria Center, Pendleton
  Center, Ransomville, Model City and Rapids.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

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

&&

LAT...LON 4329 7862 4308 7861 4310 7864 4309 7864
      4308 7865 4309 7866 4308 7868 4309 7869
      4309 7905 4313 7905 4315 7904 4317 7906
      4323 7905
TIME...MOT...LOC 2114Z 267DEG 11KT 4315 7899 

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

Mitchell

2 follow-up statements

215 
WWUS51 KBUF 162129
SVSBUF

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

NYC063-162215-
/O.CON.KBUF.SV.W.0084.000000T0000Z-190816T2215Z/
Niagara NY-
529 PM EDT Fri Aug 16 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CENTRAL NIAGARA COUNTY...

At 528 PM EDT, a severe thunderstorm was located over Sanborn, or 7
miles northeast of Niagara Falls, moving east at 15 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Lockport, Newfane, Sanborn, Cambria Center, Pendleton Center,
Ransomville and Rapids.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail, strong winds, and deadly cloud 
to ground lightning. Seek shelter inside a well-built structure. 
Stay away from windows.

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

&&

LAT...LON 4329 7862 4308 7861 4310 7864 4309 7864
      4308 7865 4309 7866 4308 7868 4309 7869
      4309 7893 4324 7895
TIME...MOT...LOC 2128Z 267DEG 11KT 4315 7893 

HAIL...1.75IN
WIND...60MPH
 
$$

Mitchell

341 
WWUS51 KBUF 162208
SVSBUF

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

NYC063-162216-
/O.EXP.KBUF.SV.W.0084.000000T0000Z-190816T2215Z/
Niagara NY-
608 PM EDT Fri Aug 16 2019

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NIAGARA COUNTY WILL
EXPIRE AT 615 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
northeastern Niagara County until 645 PM EDT.

LAT...LON 4329 7862 4308 7861 4310 7864 4309 7864
      4308 7865 4309 7866 4308 7868 4309 7869
      4309 7893 4324 7895
TIME...MOT...LOC 2206Z 267DEG 11KT 4316 7878 

$$

JJR

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, 5:37 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Wyoming	53 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.