Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 69, NWS Buffalo, NY

July 8, 2017Erie County, Genesee County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 8, 2017, 1:49 AM EDT for Erie County, Genesee County, Wyoming County, New York. It was in force for 41 min. 3 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 8, 2017, 1:49 AM EDT (05:49 UTC)
Expired: Jul 8, 2017, 2:30 AM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Buffalo radar (KBUF), 39 km from the middle of the area, began a volume at 05:51 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 8, 1:49 AM EDT	HAIL 1.75	East Pembroke, NY
Jul 8, 2:07 AM EDT	TSTM WND DMG	Batavia, NY	SEVERAL TREES DOWN ACROSS THE CITY
Jul 8, 2:12 AM EDT	TSTM WND DMG	Batavia, NY	TREE DOWN IN THE TOWN OF BATAVIA

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 00:00Z, 5.8 hours before the alert went out and 37 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: 490 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

621 
WUUS51 KBUF 080549
SVRBUF
NYC029-037-121-080630-
/O.NEW.KBUF.SV.W.0069.170708T0549Z-170708T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
149 AM EDT SAT JUL 8 2017

The National Weather Service in Buffalo has issued a

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

* Until 230 AM EDT.

* At 148 AM EDT, a severe thunderstorm was located over Pembroke, or
  near Darien Lakes State Park, moving east at 35 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, Bennington,
  Akron, Alden 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.

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

&&

LAT...LON 4283 7855 4310 7855 4309 7854 4309 7852
      4310 7851 4308 7850 4308 7847 4310 7846
      4313 7792 4309 7792 4304 7795 4304 7793
      4291 7794 4290 7796 4282 7796
TIME...MOT...LOC 0548Z 267DEG 30KT 4297 7839 

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

Thomas

2 follow-up statements

796 
WWUS51 KBUF 080614
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
214 AM EDT SAT JUL 8 2017

NYC029-080623-
/O.CAN.KBUF.SV.W.0069.000000T0000Z-170708T0630Z/
Erie NY-
214 AM EDT SAT JUL 8 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4287 7834 4310 7833 4313 7792 4309 7792
      4304 7795 4304 7793 4291 7794 4290 7796
      4282 7796
TIME...MOT...LOC 0613Z 267DEG 30KT 4298 7810 

$$

NYC037-121-080630-
/O.CON.KBUF.SV.W.0069.000000T0000Z-170708T0630Z/
Wyoming NY-Genesee NY-
214 AM EDT SAT JUL 8 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM EDT
FOR NORTHEASTERN WYOMING AND GENESEE COUNTIES...

At 213 AM EDT, a severe thunderstorm was located near Batavia, moving
east at 35 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, Byron, Oakfield, Stafford and
Covington.

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.

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

&&

LAT...LON 4287 7834 4310 7833 4313 7792 4309 7792
      4304 7795 4304 7793 4291 7794 4290 7796
      4282 7796
TIME...MOT...LOC 0613Z 267DEG 30KT 4298 7810 

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

Thomas

480 
WWUS51 KBUF 080629
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
229 AM EDT SAT JUL 8 2017

NYC037-121-080639-
/O.EXP.KBUF.SV.W.0069.000000T0000Z-170708T0630Z/
Wyoming NY-Genesee NY-
229 AM EDT SAT JUL 8 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING AND
GENESEE COUNTIES WILL EXPIRE AT 230 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.  However gusty winds
and heavy rain are still possible with this thunderstorm.

LAT...LON 4287 7834 4310 7833 4313 7792 4309 7792
      4304 7795 4304 7793 4291 7794 4290 7796
      4282 7796
TIME...MOT...LOC 0629Z 267DEG 30KT 4299 7793 

$$

Thomas

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:51 PM EDT	Special Marine Warning	BUF		54 min
Jul 8, 2:28 AM EDT	Special Weather Statement	BUF	Monroe	47 min
Jul 8, 3:33 AM EDT	Special Weather Statement	BUF	Jefferson	27 min
Jul 8, 3:42 AM EDT	Special Marine Warning	BUF		63 min
Jul 8, 4:11 AM EDT	Special Weather Statement	BUF	Oswego	49 min
Jul 8, 4:42 AM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	49 min
Jul 8, 4:51 AM EDT	Beach Hazards Statement	BUF	Cayuga, Oswego, Wayne	18 hr
Jul 8, 4:51 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	36 hr
Jul 8, 4:53 AM EDT	Small Craft Advisory	BUF		39 hr
Jul 8, 5:37 AM EDT	Special Weather Statement	BUF	St. Lawrence	23 min
Jul 8, 7:47 AM EDT	Special Weather Statement	BUF	Allegany	58 min
Jul 8, 7:58 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	47 min
Jul 8, 8:41 AM EDT	Special Weather Statement	BUF	Livingston	49 min
Jul 8, 2:51 PM EDT	Special Marine Warning	BUF		84 min
Jul 8, 3:12 PM EDT	Special Weather Statement	BUF	Jefferson	48 min
Jul 8, 3:59 PM EDT	Special Weather Statement	BUF	Jefferson	46 min
Jul 8, 4:43 PM EDT	Special Weather Statement	BUF	Lewis	32 min

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.