Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 17, NWS Buffalo, NY

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

NWS Buffalo, NY issued this severe thunderstorm warning at May 18, 2017, 1:38 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 52 min. 2 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, 1:38 PM EDT (17:38 UTC)
Expired: May 18, 2017, 2:30 PM EDT
In force: 52 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 69 km from the middle of the area, began a volume at 17:38 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
May 18, 1:52 PM EDT	HAIL 0.5	2 Sw Forestville, NY
May 18, 1:54 PM EDT	HAIL 0.5	1 Sse Forestville, 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, 5.6 hours before the alert went out and 69 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.

622 
WUUS51 KBUF 181738
SVRBUF
NYC009-013-029-181830-
/O.NEW.KBUF.SV.W.0017.170518T1738Z-170518T1830Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cattaraugus County in western New York...
  Southwestern Erie County in western New York...
  Northeastern Chautauqua County in western New York...

* Until 230 PM EDT.

* At 137 PM EDT, a severe thunderstorm was located near Lake Erie
  State Park, or 7 miles southwest of Fredonia, 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...
  Dunkirk, Fredonia, Evans, Eden, Gowanda, Silver Creek, Angola and
  North Collins.

This includes Interstate 90 between exits 59 and 57A.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 7941 4238 7952 4270 7900 4252 7873
TIME...MOT...LOC 1737Z 236DEG 38KT 4237 7943 

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

Apffel

3 follow-up statements

490 
WWUS51 KBUF 181753
SVSBUF

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

NYC009-013-029-181830-
/O.CON.KBUF.SV.W.0017.000000T0000Z-170518T1830Z/
Cattaraugus NY-Erie NY-Chautauqua NY-
153 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR NORTHWESTERN CATTARAUGUS...SOUTHWESTERN ERIE AND NORTHEASTERN
CHAUTAUQUA COUNTIES...

At 153 PM EDT, a severe thunderstorm was located near Fredonia,
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...
Eden, Gowanda, Silver Creek, Angola, North Collins, Evangola State
Park, Collins and Sheridan.

This includes Interstate 90 between exits 58 and 57A.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4237 7920 4248 7931 4268 7897 4252 7873
TIME...MOT...LOC 1753Z 242DEG 39KT 4246 7922 

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

Apffel

415 
WWUS51 KBUF 181815
SVSBUF

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

NYC013-181824-
/O.CAN.KBUF.SV.W.0017.000000T0000Z-170518T1830Z/
Chautauqua NY-
215 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHAUTAUQUA 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 4245 7896 4258 7905 4264 7892 4252 7873
TIME...MOT...LOC 1814Z 236DEG 38KT 4259 7896 

$$

NYC009-029-181830-
/O.CON.KBUF.SV.W.0017.000000T0000Z-170518T1830Z/
Cattaraugus NY-Erie NY-
215 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR NORTHWESTERN CATTARAUGUS AND SOUTHWESTERN ERIE COUNTIES...

At 214 PM EDT, a severe thunderstorm was located over North Collins,
or 11 miles southwest 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...
Eden, Gowanda, North Collins, Collins, Versailles and Langford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4245 7896 4258 7905 4264 7892 4252 7873
TIME...MOT...LOC 1814Z 236DEG 38KT 4259 7896 

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

Church

582 
WWUS51 KBUF 181823
SVSBUF

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

NYC009-029-181833-
/O.EXP.KBUF.SV.W.0017.000000T0000Z-170518T1830Z/
Cattaraugus NY-Erie NY-
223 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CATTARAUGUS AND
SOUTHWESTERN ERIE COUNTIES WILL EXPIRE AT 230 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore the warning will be
allowed to expire.

LAT...LON 4245 7896 4258 7905 4264 7892 4252 7873
TIME...MOT...LOC 1823Z 236DEG 38KT 4263 7887 

$$

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, 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, 3:17 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	43 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.