Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 18, NWS Buffalo, NY

May 18, 2017Cattaraugus County, Erie County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 18, 2017, 3:17 PM EDT for Cattaraugus County, Erie County, Wyoming County, New York. It was in force for 43 min. 4 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: May 18, 2017, 3:17 PM EDT (19:17 UTC)
Expired: May 18, 2017, 4:00 PM EDT
In force: 43 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 44 km from the middle of the area, began a volume at 19:16 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
May 18, 3:22 PM EDT	HAIL 1	Collins, NY
May 18, 3:33 PM EDT	HAIL 2	1 Nw Concord, NY
May 18, 3:34 PM EDT	HAIL 0.88	1 Nne Concord, NY
May 18, 3:38 PM EDT	HAIL 1	East Concord, NY

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, 7.3 hours before the alert went out and 42 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: 37 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1826 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

896 
WUUS51 KBUF 181917
SVRBUF
NYC009-029-121-182000-
/O.NEW.KBUF.SV.W.0018.170518T1917Z-170518T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
317 PM EDT THU MAY 18 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Western Wyoming County in western New York...
  Northern Cattaraugus County in western New York...
  Southern Erie County in western New York...

* Until 400 PM EDT.

* At 317 PM EDT, a severe thunderstorm was located over Gowanda, or
  16 miles south of Hamburg, moving northeast at 45 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...
  Boston, Springville, Colden, Gowanda, Arcade, North Collins,
  Chaffee and East Concord.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4240 7894 4255 7903 4286 7831 4256 7814
TIME...MOT...LOC 1917Z 244DEG 37KT 4250 7893 

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

Church

3 follow-up statements

104 
WWUS51 KBUF 181934
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
334 PM EDT THU MAY 18 2017

NYC009-181943-
/O.CAN.KBUF.SV.W.0018.000000T0000Z-170518T2000Z/
Cattaraugus NY-
334 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CATTARAUGUS 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 4260 7877 4284 7830 4256 7814 4252 7846
      4254 7847 4251 7857 4252 7858 4250 7862
      4249 7872
TIME...MOT...LOC 1933Z 244DEG 37KT 4258 7872 

$$

NYC029-121-182000-
/O.CON.KBUF.SV.W.0018.000000T0000Z-170518T2000Z/
Wyoming NY-Erie NY-
334 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR WESTERN WYOMING AND SOUTHEASTERN ERIE COUNTIES...

At 333 PM EDT, a severe thunderstorm was located near Boston, or 11
miles southeast of Hamburg, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Springville, Colden, Arcade, East Concord, Varysburg, Chaffee,
Concord and Yorkshire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4260 7877 4284 7830 4256 7814 4252 7846
      4254 7847 4251 7857 4252 7858 4250 7862
      4249 7872
TIME...MOT...LOC 1933Z 244DEG 37KT 4258 7872 

HAIL...1.25IN
WIND...60MPH
 
$$

Church

686 
WWUS51 KBUF 181952
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
352 PM EDT THU MAY 18 2017

NYC029-182002-
/O.CAN.KBUF.SV.W.0018.000000T0000Z-170518T2000Z/
Erie NY-
352 PM EDT THU MAY 18 2017

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

A severe thunderstorm watch remains in effect until 1100 PM EDT for
western New York.

LAT...LON 4252 7846 4253 7847 4276 7846 4284 7830
      4256 7814
TIME...MOT...LOC 1952Z 244DEG 37KT 4267 7848 

$$

NYC121-182000-
/O.CON.KBUF.SV.W.0018.000000T0000Z-170518T2000Z/
Wyoming NY-
352 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR WESTERN WYOMING COUNTY...

At 352 PM EDT, a severe thunderstorm was located near Chaffee, or 9
miles southeast of East Aurora, moving northeast at 45 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...
Arcade, Varysburg, Yorkshire, Sheldon, Eagle, Pike, Strykersville and
Hermitage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4252 7846 4253 7847 4276 7846 4284 7830
      4256 7814
TIME...MOT...LOC 1952Z 244DEG 37KT 4267 7848 

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

Church

877 
WWUS51 KBUF 181959
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
359 PM EDT THU MAY 18 2017

NYC121-182009-
/O.EXP.KBUF.SV.W.0018.000000T0000Z-170518T2000Z/
Wyoming NY-
359 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WYOMING COUNTY WILL
EXPIRE AT 400 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Wyoming, Livingston, and Ontario Counties.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
western New York.

LAT...LON 4252 7846 4253 7847 4276 7846 4284 7830
      4256 7814
TIME...MOT...LOC 1959Z 244DEG 37KT 4269 7843 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 1:35 PM EDT	Special Weather Statement	BUF	Chautauqua	25 min
May 18, 1:38 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	52 min
May 18, 2:36 PM EDT	Special Weather Statement	BUF	Wyoming	24 min
May 18, 2:41 PM EDT	Special Weather Statement	BUF	Ontario	34 min
May 18, 3:13 PM EDT	Special Weather Statement	BUF	Wyoming	32 min
May 18, 3:22 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	38 min
May 18, 3:51 PM EDT	Special Weather Statement	BUF	Livingston, Ontario	24 min
May 18, 3:57 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario, Wyoming	48 min
May 18, 4:05 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	40 min
May 18, 4:39 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	51 min
May 18, 5:25 PM EDT	Special Weather Statement	BUF	Cayuga	35 min
May 18, 5:28 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	47 min
May 18, 5:41 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	64 min
May 18, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	39 min
May 18, 6:17 PM EDT	Special Weather Statement	BUF	Allegany	28 min
May 18, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	28 min
May 18, 6:45 PM EDT	Special Weather Statement	BUF	Lewis	45 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.