Alert archive / New York / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 53, NWS Buffalo, NY

July 16, 2020Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 16, 2020, 3:52 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 53 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: Jul 16, 2020, 3:52 PM EDT (19:52 UTC)
Expired: Jul 16, 2020, 4:45 PM EDT
In force: 53 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 45 km from the middle of the area, began a volume at 19:56 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
Jul 16, 4:16 PM EDT	TSTM WND DMG	Irving, NY	MULTIPLE TREES DOWN.
Jul 16, 4:16 PM EDT	TSTM WND DMG	Irving, NY	MULTIPLE TREES DOWN.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 16, 1:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.9 hours before the alert went out and 46 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: 12 J/kg
Mixed-layer CIN: -260 J/kg
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

776 
WUUS51 KBUF 161952
SVRBUF
NYC009-013-029-162045-
/O.NEW.KBUF.SV.W.0053.200716T1952Z-200716T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
352 PM EDT Thu Jul 16 2020

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cattaraugus County in western New York...
  Southwestern Erie County in western New York...
  Northeastern Chautauqua County in western New York...

* Until 445 PM EDT..

* At 351 PM EDT, a severe thunderstorm was located over Dunkirk,
  moving northeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lackawanna, Dunkirk, Fredonia, Hamburg, Evans, Boston, Eden,
  Colden, Silver Creek and Blasdell.

 This includes Interstate 90 between exits 59 and 57.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes can develop quickly from severe thunderstorms. Although a 
tornado is not immediately likely, if one is spotted, act quickly 
and move to a place of safety inside a sturdy structure such as a 
basement or small interior room.

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

&&

LAT...LON 4247 7937 4259 7922 4260 7918 4263 7917
      4275 7900 4280 7892 4282 7892 4284 7889
      4264 7868 4233 7924
TIME...MOT...LOC 1951Z 229DEG 31KT 4250 7929 

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

RSH

1 follow-up statement

169 
WWUS51 KBUF 162016
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
416 PM EDT Thu Jul 16 2020

NYC009-013-029-162045-
/O.CON.KBUF.SV.W.0053.000000T0000Z-200716T2045Z/
Cattaraugus NY-Erie NY-Chautauqua NY-
416 PM EDT Thu Jul 16 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHWESTERN CATTARAUGUS...SOUTHWESTERN ERIE AND NORTHEASTERN
CHAUTAUQUA COUNTIES...

At 415 PM EDT, a severe thunderstorm was located over Angola on the
Lake and moving northeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lackawanna, Hamburg, Evans, Boston, Eden, Colden, Silver Creek,
Blasdell, Angola and North Collins.

 This includes Interstate 90 between exits 58 and 57.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

&&

LAT...LON 4258 7923 4260 7918 4263 7916 4275 7900
      4280 7892 4282 7892 4284 7889 4264 7868
      4244 7906
TIME...MOT...LOC 2015Z 229DEG 31KT 4264 7907 

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

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 4:11 AM EDT	Small Craft Advisory	BUF		28 hr
Jul 16, 11:28 AM EDT	Special Weather Statement	BUF	Genesee	32 min
Jul 16, 11:57 AM EDT	Special Weather Statement	BUF	Genesee	33 min
Jul 16, 12:09 PM EDT	Special Marine Warning	BUF		66 min
Jul 16, 12:33 PM EDT	Special Weather Statement	BUF	Monroe	27 min
Jul 16, 12:37 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	38 min
Jul 16, 1:42 PM EDT	Special Marine Warning	BUF		93 min
Jul 16, 2:12 PM EDT	Special Marine Warning	BUF		22 min
Jul 16, 2:39 PM EDT	Special Weather Statement	BUF	Oswego	36 min
Jul 16, 3:04 PM EDT	Special Marine Warning	BUF		41 min
Jul 16, 3:48 PM EDT	Special Marine Warning	BUF		57 min
Jul 16, 3:53 PM EDT	Special Marine Warning	BUF		67 min
Jul 16, 4:07 PM EDT	Tornado Warning	BUF	Cattaraugus, Chautauqua, Erie	38 min
Jul 16, 4:08 PM EDT	Special Marine Warning	BUF		53 min
Jul 16, 4:13 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	62 min
Jul 16, 4:23 PM EDT	Special Weather Statement	BUF	Monroe	67 min
Jul 16, 4:44 PM EDT	Special Weather Statement	BUF	Erie	46 min
Jul 16, 5:02 PM EDT	Special Weather Statement	BUF	Genesee	43 min
Jul 16, 5:12 PM EDT	Special Weather Statement	BUF	Cattaraugus, Erie	63 min
Jul 16, 5:14 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	46 min
Jul 16, 5:36 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	24 min
Jul 16, 5:49 PM EDT	Areal Flood Warning	BUF	Chautauqua, Erie, Genesee, Wyoming	3 hr
Jul 16, 5:50 PM EDT	Special Weather Statement	BUF	Genesee, Livingston, Ontario, Wayne	55 min
Jul 16, 5:50 PM EDT	Tornado Warning	BUF	Cattaraugus, Chautauqua	40 min
Jul 16, 5:58 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	47 min
Jul 16, 6:32 PM EDT	Tornado Warning	BUF	Cattaraugus	28 min
Jul 16, 6:42 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	3 hr
Jul 16, 6:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	40 min
Jul 16, 6:59 PM EDT	Tornado Warning	BUF	Cattaraugus	31 min
Jul 16, 7:15 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus	4 hr
Jul 16, 7:17 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	43 min
Jul 16, 7:42 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.