Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 82, NWS Buffalo, NY

July 23, 2017Genesee County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 23, 2017, 3:38 PM EDT for Genesee County, Wyoming County, New York. It was in force for 41 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 23, 2017, 3:38 PM EDT (19:38 UTC)
Expired: Jul 23, 2017, 4:19 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Genesee County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 46 km from the middle of the area, began a volume at 19:36 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 23, 4:06 PM EDT	FUNNEL CLOUD	2 Nw Silver Lake, NY	PHOTO SHARED ON TWITTER OF A FUNNEL CLOUD LOOKING WEST FROM PERRY. RADAR VELOCITY SHOWS A VERY WEAK ROTATIONAL COUPLET IN THIS LOCATION AT 406PM. CALLS TO COUNTY OFFICIALS HAVE YIELDED NO DAMAGE REPORTS IN THE AREA.

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, 7.6 hours before the alert went out and 43 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: 1092 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

926 
WUUS51 KBUF 231938
SVRBUF
NYC037-121-232045-
/O.NEW.KBUF.SV.W.0082.170723T1938Z-170723T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
338 PM EDT SUN JUL 23 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northern Wyoming County in western New York...
  Southern Genesee County in western New York...

* Until 445 PM EDT.

* At 337 PM EDT, a severe thunderstorm was located over Darien Lakes
  State Park, 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 trees and power lines. 

* Locations impacted include...
  Batavia, Darien Lakes State Park, Le Roy, Pembroke, Perry, Warsaw,
  Bennington and Attica.

This includes Interstate 90 between exits 48A and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4283 7848 4287 7848 4287 7846 4301 7846
      4304 7791 4295 7792 4294 7793 4291 7794
      4290 7796 4269 7796
TIME...MOT...LOC 1937Z 276DEG 15KT 4292 7838 

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

Church

2 follow-up statements

831 
WWUS51 KBUF 232000
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
400 PM EDT SUN JUL 23 2017

NYC037-121-232045-
/O.CON.KBUF.SV.W.0082.000000T0000Z-170723T2045Z/
Wyoming NY-Genesee NY-
400 PM EDT SUN JUL 23 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHEASTERN WYOMING AND SOUTHEASTERN GENESEE COUNTIES...

At 359 PM EDT, a severe thunderstorm was located near Attica, or 7
miles southwest 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 
         trees and power lines. 

Locations impacted include...
Batavia, Le Roy, Attica, Pavilion, Stafford, Covington, Alexander and
Wyoming.

This includes Interstate 90 between exits 48 and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4302 7826 4304 7791 4295 7792 4294 7793
      4291 7794 4290 7796 4272 7796 4284 7829
TIME...MOT...LOC 1959Z 276DEG 15KT 4291 7825 

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

Church

013 
WWUS51 KBUF 232019
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
419 PM EDT SUN JUL 23 2017

NYC037-121-232028-
/O.CAN.KBUF.SV.W.0082.000000T0000Z-170723T2045Z/
Wyoming NY-Genesee NY-
419 PM EDT SUN JUL 23 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING AND
SOUTHEASTERN GENESEE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.  However heavy rain is 
still occuring with this thunderstorm. Remember, a Flash Flood 
Warning still remains in effect for Southeast Genesee and Northeast 
Wyoming County.

LAT...LON 4302 7826 4304 7791 4295 7792 4294 7793
      4291 7794 4290 7796 4272 7796 4284 7829
TIME...MOT...LOC 2016Z 276DEG 15KT 4290 7814 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:31 AM EDT	Beach Hazards Statement	BUF	Monroe, Niagara, Orleans	18 hr
Jul 23, 4:31 AM EDT	Lakeshore Flood Watch	BUF	Monroe, Niagara, Orleans	5 hr
Jul 23, 4:32 AM EDT	Small Craft Advisory	BUF		24 hr
Jul 23, 9:57 AM EDT	Lakeshore Flood Warning	BUF	Monroe, Orleans	19 hr
Jul 23, 1:34 PM EDT	Special Weather Statement	BUF	Allegany	56 min
Jul 23, 2:12 PM EDT	Special Weather Statement	BUF	Ontario	63 min
Jul 23, 2:22 PM EDT	Special Weather Statement	BUF	Allegany	53 min
Jul 23, 2:34 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	56 min
Jul 23, 2:59 PM EDT	Tornado Warning	BUF	Ontario	31 min
Jul 23, 3:28 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	62 min
Jul 23, 3:30 PM EDT	Special Weather Statement	BUF	Genesee	60 min
Jul 23, 3:57 PM EDT	Flash Flood Warning	BUF	Ontario	3 hr
Jul 23, 4:15 PM EDT	Flash Flood Warning	BUF	Genesee, Wyoming	3 hr
Jul 23, 4:38 PM EDT	Special Weather Statement	BUF	Livingston	67 min
Jul 23, 4:59 PM EDT	Flash Flood Warning	BUF	Livingston, Ontario	4 hr
Jul 23, 5:32 PM EDT	Special Weather Statement	BUF	Niagara	88 min
Jul 23, 6:13 PM EDT	Special Marine Warning	BUF		62 min
Jul 23, 6:53 PM EDT	Areal Flood Warning	BUF	Ontario	12 hr

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every severe thunderstorm warning in 2017

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.