Alert archive / New York / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 12, NWS Buffalo, NY

May 29, 20204 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2020, 12:44 PM EDT for 4 counties in New York. It was in force for 46 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: May 29, 2020, 12:44 PM EDT (16:44 UTC)
Expired: May 29, 2020, 1:30 PM EDT
In force: 46 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Erie County, NY, Genesee County, NY, Niagara County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 5 km from the middle of the area, began a volume at 16:47 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 12:00Z, 4.7 hours before the alert went out and 2 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: 1304 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

088 
WUUS51 KBUF 291644
SVRBUF
NYC029-037-063-121-291730-
/O.NEW.KBUF.SV.W.0012.200529T1644Z-200529T1730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1244 PM EDT Fri May 29 2020

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wyoming County in western New York...
  Northeastern Erie County in western New York...
  Southeastern Niagara County in western New York...
  Southern Genesee County in western New York...

* Until 130 PM EDT..

* At 1244 PM EDT, a severe thunderstorm was located near Orchard
  Park, or near West Seneca, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Buffalo, Cheektowaga, West Seneca, Clarence, Lackawanna, Batavia,
  Kenmore, Depew, Amherst and Tonawanda.

 This includes Interstate 90 between exits 56 and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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

&&

LAT...LON 4291 7890 4293 7891 4313 7856 4297 7796
      4266 7872 4286 7892
TIME...MOT...LOC 1644Z 229DEG 31KT 4279 7870 

HAIL...0.75IN
WIND...60MPH
 
$$

Fries

3 follow-up statements

509 
WWUS51 KBUF 291706
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
106 PM EDT Fri May 29 2020

NYC029-037-063-121-291730-
/O.CON.KBUF.SV.W.0012.000000T0000Z-200529T1730Z/
Wyoming NY-Erie NY-Niagara NY-Genesee NY-
106 PM EDT Fri May 29 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR NORTHWESTERN WYOMING...NORTHEASTERN ERIE...SOUTHEASTERN NIAGARA
AND SOUTHERN GENESEE COUNTIES...

At 106 PM EDT, a severe thunderstorm was located over Alden, or near
Darien Lakes State Park, moving northeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Clarence, Batavia, Darien Lakes State Park, Le Roy, Pembroke,
Bennington, Akron, Alden, Attica and Stafford.

 This includes Interstate 90 between exits 48A and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Buffalo.

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

&&

LAT...LON 4313 7856 4297 7796 4275 7850 4285 7855
      4309 7864
TIME...MOT...LOC 1706Z 234DEG 31KT 4288 7852 

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

Fries

133 
WWUS51 KBUF 291721
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
121 PM EDT Fri May 29 2020

NYC029-063-121-291730-
/O.CAN.KBUF.SV.W.0012.000000T0000Z-200529T1730Z/
Wyoming NY-Erie NY-Niagara NY-
121 PM EDT Fri May 29 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WYOMING...
NORTHEASTERN ERIE AND SOUTHEASTERN NIAGARA COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4310 7846 4297 7796 4287 7821 4287 7846
TIME...MOT...LOC 1720Z 234DEG 32KT 4296 7824 

$$

NYC037-291730-
/O.CON.KBUF.SV.W.0012.000000T0000Z-200529T1730Z/
Genesee NY-
121 PM EDT Fri May 29 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR SOUTHERN GENESEE COUNTY...

At 120 PM EDT, a severe thunderstorm was located near Batavia, moving
northeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Batavia, Darien Lakes State Park, Le Roy, Pembroke, Attica, Stafford,
Corfu, Alexander, East Bethany and East Pembroke.

 This includes Interstate 90 between exits 48A and 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Buffalo.

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

&&

LAT...LON 4310 7846 4297 7796 4287 7821 4287 7846
TIME...MOT...LOC 1720Z 234DEG 32KT 4296 7824 

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

Fries

764 
WWUS51 KBUF 291730
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
130 PM EDT Fri May 29 2020

NYC037-291740-
/O.EXP.KBUF.SV.W.0012.000000T0000Z-200529T1730Z/
Genesee NY-
130 PM EDT Fri May 29 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GENESEE COUNTY 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 4310 7846 4297 7796 4287 7821 4287 7846
TIME...MOT...LOC 1730Z 229DEG 31KT 4302 7815 

$$

Fries

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:03 AM EDT	Special Weather Statement	BUF	Lewis	27 min
May 29, 12:15 PM EDT	Special Marine Warning	BUF		42 min
May 29, 12:18 PM EDT	Special Marine Warning	BUF		27 min
May 29, 12:32 PM EDT	Special Weather Statement	BUF	Erie	43 min
May 29, 12:55 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	21 min
May 29, 1:27 PM EDT	Special Weather Statement	BUF	Genesee	33 min
May 29, 1:36 PM EDT	Special Marine Warning	BUF		24 min
May 29, 1:42 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	34 min
May 29, 1:43 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans, Wayne	47 min
May 29, 1:56 PM EDT	Beach Hazards Statement	BUF	Cayuga, Jefferson, Oswego	14 hr
May 29, 1:57 PM EDT	Small Craft Advisory	BUF		14 hr
May 29, 1:58 PM EDT	Special Weather Statement	BUF	Cattaraugus	32 min
May 29, 2:07 PM EDT	Special Marine Warning	BUF		53 min
May 29, 2:13 PM EDT	Special Weather Statement	BUF	Lewis	32 min
May 29, 2:14 PM EDT	Special Weather Statement	BUF	Cattaraugus, Wyoming	61 min
May 29, 2:22 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Livingston, Wyoming	53 min
May 29, 2:33 PM EDT	Special Weather Statement	BUF	Wayne	42 min
May 29, 2:39 PM EDT	Special Marine Warning	BUF		53 min
May 29, 3:03 PM EDT	Special Weather Statement	BUF	Oswego	42 min
May 29, 3:07 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	26 min
May 29, 3:23 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	47 min
May 29, 3:36 PM EDT	Special Marine Warning	BUF		54 min
May 29, 3:45 PM EDT	Special Weather Statement	BUF	Chautauqua	45 min
May 29, 4:20 PM EDT	Special Weather Statement	BUF	Lewis	25 min
May 29, 4:35 PM EDT	Special Weather Statement	BUF	Erie	40 min
May 29, 4:40 PM EDT	Special Weather Statement	BUF	Lewis	50 min
May 29, 4:51 PM EDT	Special Marine Warning	BUF		24 min
May 29, 4:51 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	40 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.