Alert archive / New York / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 86, NWS Buffalo, NY

August 25, 2020Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 25, 2020, 1:59 AM EDT for Erie County, Niagara County, New York. It was in force for 61 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 25, 2020, 1:59 AM EDT (05:59 UTC)
Expired: Aug 25, 2020, 3:00 AM EDT
In force: 61 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 18 km from the middle of the area, began a volume at 06:01 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 00:00Z, 6.0 hours before the alert went out and 21 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: 364 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1291 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

896 
WUUS51 KBUF 250559
SVRBUF
NYC029-063-250700-
/O.NEW.KBUF.SV.W.0086.200825T0559Z-200825T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
159 AM EDT Tue Aug 25 2020

The National Weather Service in Buffalo has issued a

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

* Until 300 AM EDT..

* At 158 AM EDT, a severe thunderstorm was located near Niagara
  Falls, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Buffalo, Cheektowaga, Niagara Falls, West Seneca, North Tonawanda,
  Clarence, Lockport, Lackawanna, Kenmore and Depew.

 This includes Interstate 90 between exits 56 and 49.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4311 7906 4312 7907 4314 7904 4328 7907
      4321 7846 4273 7849 4280 7892 4284 7893
      4289 7891 4293 7891 4296 7893 4296 7896
      4299 7901 4302 7902 4306 7900 4308 7908
TIME...MOT...LOC 0558Z 281DEG 29KT 4307 7912 

HAIL...<.75IN
WIND...60MPH
 
$$

Welch

1 follow-up statement

034 
WWUS51 KBUF 250654
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
254 AM EDT Tue Aug 25 2020

NYC029-063-250703-
/O.EXP.KBUF.SV.W.0086.000000T0000Z-200825T0700Z/
Erie NY-Niagara NY-
254 AM EDT Tue Aug 25 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE AND NIAGARA
COUNTIES WILL EXPIRE AT 300 AM EDT...
        
The storm which prompted the warning has weakened below severe 
limits, and continues to exit the warned area. Therefore, the 
warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Buffalo.

LAT...LON 4311 7906 4312 7907 4314 7904 4328 7907
      4321 7846 4273 7849 4280 7892 4284 7893
      4289 7891 4293 7891 4296 7893 4296 7896
      4299 7901 4302 7902 4306 7900 4308 7908
TIME...MOT...LOC 0653Z 281DEG 29KT 4299 7856 

$$

JLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 1:28 AM EDT	Special Marine Warning	BUF		92 min
Aug 25, 1:52 AM EDT	Special Marine Warning	BUF		53 min
Aug 25, 2:27 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Niagara, Orleans	63 min
Aug 25, 2:40 AM EDT	Special Weather Statement	BUF	Erie	50 min
Aug 25, 2:46 AM EDT	Special Marine Warning	BUF		59 min
Aug 25, 3:14 AM EDT	Special Weather Statement	BUF	Jefferson, Monroe, Ontario, Oswego, Wayne	91 min
Aug 25, 3:18 AM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Chautauqua, Livingston, Wyoming	87 min
Aug 25, 3:45 AM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	60 min
Aug 25, 4:25 AM EDT	Small Craft Advisory	BUF		24 hr
Aug 25, 4:26 AM EDT	Beach Hazards Statement	BUF	Cayuga, Jefferson, Monroe, Oswego, Wayne	24 hr
Aug 25, 11:54 AM EDT	Special Weather Statement	BUF	Ontario	51 min

Nearby

Severe Thunderstorm Warnings in New York, 2020 Every severe thunderstorm warning in 2020

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.