Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Buffalo, NY

July 6, 2021Monroe County, Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 6, 2021, 12:21 PM EDT for Monroe County, Ontario County, Wayne County, New York. It was in force for 54 min. 1 report 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 6, 2021, 12:21 PM EDT (16:21 UTC)
Expired: Jul 6, 2021, 1:15 PM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Monroe County, NY, Ontario County, NY, Wayne County, NY

The radar

The Binghamton radar (KBGM), 125 km from the middle of the area, began a volume at 16:24 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 6, 12:34 PM EDT	TSTM WND DMG	2 Sse East Bloomfield, NY	TREES DOWN.

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, 4.4 hours before the alert went out and 123 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: 997 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 868 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

262 
WUUS51 KBUF 061621
SVRBUF
NYC055-069-117-061715-
/O.NEW.KBUF.SV.W.0049.210706T1621Z-210706T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1221 PM EDT Tue Jul 6 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Wayne County in western New York...
  Southeastern Monroe County in western New York...
  Ontario County in western New York...

* Until 115 PM EDT..

* At 1221 PM EDT, severe thunderstorms were located along a line
  extending from near Fairport to near Bristol, moving east at 30
  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...
  Geneva, Canandaigua, Fairport, Newark, Lyons, Palmyra, Victor,
  Bristol, Clifton Springs and Phelps.

 This includes Interstate 90 between exits 45 and 42.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Canandaigua Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4309 7749 4312 7696 4287 7697 4286 7698
      4284 7697 4276 7697 4276 7731 4275 7732
      4275 7750
TIME...MOT...LOC 1621Z 257DEG 27KT 4306 7742 4279 7743 

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

Hitchcock

2 follow-up statements

071 
WWUS51 KBUF 061644
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1244 PM EDT Tue Jul 6 2021

NYC055-061654-
/O.CAN.KBUF.SV.W.0049.000000T0000Z-210706T1715Z/
Monroe NY-
1244 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONROE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4312 7696 4287 7697 4286 7698 4284 7697
      4276 7697 4276 7731 4275 7732 4275 7738
      4310 7725
TIME...MOT...LOC 1644Z 258DEG 30KT 4307 7713 4283 7725 

$$

NYC069-117-061715-
/O.CON.KBUF.SV.W.0049.000000T0000Z-210706T1715Z/
Wayne NY-Ontario NY-
1244 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR SOUTHWESTERN WAYNE AND NORTHEASTERN ONTARIO COUNTIES...

At 1244 PM EDT, severe thunderstorms were located along a line
extending from near Newark to near Canandaigua, moving east at 35
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Geneva, Canandaigua, Newark, Lyons, Palmyra, Clifton Springs, Phelps,
Rushville, Gorham and Manchester.

 This includes Interstate 90 between exits 43 and 42.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
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 4312 7696 4287 7697 4286 7698 4284 7697
      4276 7697 4276 7731 4275 7732 4275 7738
      4310 7725
TIME...MOT...LOC 1644Z 258DEG 30KT 4307 7713 4283 7725 

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

Hitchcock

605 
WWUS51 KBUF 061715
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
115 PM EDT Tue Jul 6 2021

NYC069-117-061725-
/O.EXP.KBUF.SV.W.0049.000000T0000Z-210706T1715Z/
Wayne NY-Ontario NY-
115 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WAYNE AND
NORTHEASTERN ONTARIO COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been 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 4312 7696 4287 7697 4286 7698 4284 7697
      4276 7697 4276 7731 4275 7732 4275 7738
      4310 7725
TIME...MOT...LOC 1715Z 257DEG 27KT 4312 7684 4288 7696 

$$

Hitchcock

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 9:12 PM EDT	Special Marine Warning	BUF		53 min
Jul 5, 9:25 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	65 min
Jul 6, 12:26 AM EDT	Special Marine Warning	BUF		94 min
Jul 6, 1:53 AM EDT	Special Marine Warning	BUF		52 min
Jul 6, 1:54 AM EDT	Special Weather Statement	BUF	Oswego	66 min
Jul 6, 2:42 AM EDT	Special Weather Statement	BUF	Oswego	48 min
Jul 6, 4:55 AM EDT	Small Craft Advisory	BUF		13 hr
Jul 6, 10:42 AM EDT	Special Weather Statement	BUF	Genesee	48 min
Jul 6, 10:51 AM EDT	Special Weather Statement	BUF	Chautauqua	39 min
Jul 6, 11:24 AM EDT	Special Weather Statement	BUF	Genesee	51 min
Jul 6, 11:32 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans	43 min
Jul 6, 11:55 AM EDT	Special Weather Statement	BUF	Monroe	35 min
Jul 6, 12:00 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Wayne	45 min
Jul 6, 12:03 PM EDT	Special Marine Warning	BUF		57 min
Jul 6, 12:29 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	32 min
Jul 6, 12:42 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	63 min
Jul 6, 12:48 PM EDT	Special Weather Statement	BUF	Niagara	57 min
Jul 6, 1:03 PM EDT	Special Weather Statement	BUF	Cayuga	27 min
Jul 6, 1:10 PM EDT	Special Weather Statement	BUF	Oswego	50 min
Jul 6, 1:36 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	27 min
Jul 6, 1:48 PM EDT	Special Weather Statement	BUF	Erie	57 min
Jul 6, 2:16 PM EDT	Flash Flood Warning	BUF	Erie	3 hr
Jul 6, 3:52 PM EDT	Special Weather Statement	BUF	Monroe	23 min
Jul 6, 4:26 PM EDT	Special Weather Statement	BUF	Wayne	34 min
Jul 6, 4:52 PM EDT	Special Weather Statement	BUF	Erie	38 min
Jul 6, 6:55 PM EDT	Special Weather Statement	BUF	Erie	35 min
Jul 6, 7:29 PM EDT	Special Weather Statement	BUF	Wyoming	46 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every severe thunderstorm warning in 2021

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.