Alert archive / New York / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 49, NWS Buffalo, NY

July 13, 2020Genesee County, Livingston County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2020, 5:51 PM EDT for Genesee County, Livingston County, Wyoming County, New York. It was in force for 39 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: Jul 13, 2020, 5:51 PM EDT (21:51 UTC)
Expired: Jul 13, 2020, 6:30 PM EDT
In force: 39 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, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 53 km from the middle of the area, began a volume at 21:52 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, 9.9 hours before the alert went out and 49 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: 1035 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS51 KBUF 132151
SVRBUF
NYC037-051-121-132230-
/O.NEW.KBUF.SV.W.0049.200713T2151Z-200713T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
551 PM EDT Mon Jul 13 2020

The National Weather Service in Buffalo has issued a

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

* Until 630 PM EDT..

* At 550 PM EDT, a severe thunderstorm was located near Attica, or
  near Batavia, moving east at 25 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...
  Letchworth State Park, Mount Morris, Attica, Pavilion, York,
  Covington, Alexander, Leicester, Wyoming and East Bethany.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4285 7830 4297 7824 4294 7781 4270 7786
TIME...MOT...LOC 2150Z 285DEG 21KT 4290 7819 

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

Apffel

2 follow-up statements

660 
WWUS51 KBUF 132211
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
611 PM EDT Mon Jul 13 2020

NYC037-051-121-132230-
/O.CON.KBUF.SV.W.0049.000000T0000Z-200713T2230Z/
Wyoming NY-Livingston NY-Genesee NY-
611 PM EDT Mon Jul 13 2020

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

At 611 PM EDT, a severe thunderstorm was located near Pavilion, or 9
miles southeast of Batavia, moving east at 15 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...
Letchworth State Park, Mount Morris, Pavilion, York, Covington,
Leicester, Wyoming, East Bethany and Bethany Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4286 7822 4296 7818 4294 7788 4272 7788
TIME...MOT...LOC 2211Z 285DEG 13KT 4288 7809 

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

Apffel

441 
WWUS51 KBUF 132224
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
624 PM EDT Mon Jul 13 2020

NYC037-051-121-132234-
/O.EXP.KBUF.SV.W.0049.000000T0000Z-200713T2230Z/
Wyoming NY-Livingston NY-Genesee NY-
624 PM EDT Mon Jul 13 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING...
NORTHWESTERN LIVINGSTON AND SOUTHEASTERN GENESEE COUNTIES WILL EXPIRE
AT 630 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4286 7822 4296 7818 4294 7788 4272 7788
TIME...MOT...LOC 2224Z 285DEG 21KT 4286 7801 

$$

Apffel

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:31 AM EDT	Special Weather Statement	BUF	Jefferson	29 min
Jul 13, 3:54 AM EDT	Areal Flood Warning	BUF	Jefferson	3 hr
Jul 13, 4:07 AM EDT	Special Marine Warning	BUF		38 min
Jul 13, 4:09 AM EDT	Special Weather Statement	BUF	Jefferson	66 min
Jul 13, 2:22 PM EDT	Special Weather Statement	BUF	Lewis	53 min
Jul 13, 3:19 PM EDT	Special Weather Statement	BUF	Monroe	56 min
Jul 13, 3:46 PM EDT	Special Weather Statement	BUF	Lewis	59 min
Jul 13, 4:12 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	52 min
Jul 13, 4:42 PM EDT	Special Weather Statement	BUF	Genesee	33 min
Jul 13, 5:02 PM EDT	Special Weather Statement	BUF	Ontario	58 min
Jul 13, 5:05 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	55 min
Jul 13, 5:16 PM EDT	Severe Thunderstorm Warning	BUF	Wyoming	33 min
Jul 13, 5:38 PM EDT	Tornado Warning	BUF	Jefferson, Lewis	22 min
Jul 13, 6:00 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	35 min
Jul 13, 6:19 PM EDT	Special Weather Statement	BUF	Erie	56 min
Jul 13, 6:20 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	37 min
Jul 13, 6:33 PM EDT	Special Weather Statement	BUF	Jefferson	27 min
Jul 13, 6:35 PM EDT	Special Weather Statement	BUF	Ontario	40 min
Jul 13, 6:40 PM EDT	Special Weather Statement	BUF	Wyoming	50 min
Jul 13, 7:29 PM EDT	Special Weather Statement	BUF	Erie	31 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.