Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 22, NWS Buffalo, NY

June 18, 2018Allegany County, Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2018, 7:27 PM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It was in force for 63 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: Jun 18, 2018, 7:27 PM EDT (23:27 UTC)
Expired: Jun 18, 2018, 8:30 PM EDT
In force: 63 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 76 km from the middle of the area, began a volume at 23:25 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
Jun 18, 7:40 PM EDT	TSTM WND DMG	Conewango, NY	1 TREE DOWN IN CONEWANGO
Jun 18, 7:51 PM EDT	TSTM WND DMG	Steamburg, NY	TREE LIMBS AND WIRES DOWN IN STEAMBURG
Jun 18, 8:20 PM EDT	TSTM WND DMG	Portville, NY	TREE DOWN ON WIRES IN PORTVILLE

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, 11.5 hours before the alert went out and 74 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: 776 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1134 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

169 
WUUS51 KBUF 182327
SVRBUF
NYC003-009-013-190030-
/O.NEW.KBUF.SV.W.0022.180618T2327Z-180619T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
727 PM EDT MON JUN 18 2018

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Cattaraugus County in western New York...
  Southeastern Chautauqua County in western New York...
  Allegany County in western New York...

* Until 830 PM EDT..

* At 727 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles south of Gowanda to Falconer to near Clymer,
  moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Olean, Salamanca, Wellsville, Allegany State Park, Alfred, Gowanda,
  Ashford and Allegany.

# 

This includes Interstate 86 between exits 14 and 32.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7946 4207 7920 4250 7902 4249 7896
      4244 7892 4246 7877 4246 7874 4229 7774
      4200 7775
TIME...MOT...LOC 2327Z 290DEG 50KT 4235 7888 4211 7918 4203 7958 

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

Church

4 follow-up statements

458 
WWUS51 KBUF 182344
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
744 PM EDT MON JUN 18 2018

NYC003-009-013-190030-
/O.CON.KBUF.SV.W.0022.000000T0000Z-180619T0030Z/
Cattaraugus NY-Chautauqua NY-Allegany NY-
744 PM EDT MON JUN 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR CATTARAUGUS...SOUTHEASTERN CHAUTAUQUA AND ALLEGANY COUNTIES...

At 743 PM EDT, severe thunderstorms were located along a line
extending from near Ashford to 8 miles west of Allegany State Park 
to near Lottsville, moving east at 60 mph. A brief tornado cannot be 
ruled out along the leading edge of the line of thunderstorms.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Olean, Salamanca, Wellsville, Allegany State Park, Alfred, Ashford,
Allegany and Franklinville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7946 4207 7920 4246 7874 4229 7774
      4200 7775
TIME...MOT...LOC 2343Z 290DEG 50KT 4228 7863 4204 7893 4196 7933 

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

Church

098 
WWUS51 KBUF 190000
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
800 PM EDT MON JUN 18 2018

NYC013-190009-
/O.CAN.KBUF.SV.W.0022.000000T0000Z-180619T0030Z/
Chautauqua NY-
800 PM EDT MON JUN 18 2018

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

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

LAT...LON 4200 7906 4217 7872 4242 7848 4229 7774
      4200 7775
TIME...MOT...LOC 2359Z 290DEG 50KT 4221 7837 4197 7867 4189 7907 

$$

NYC003-009-190030-
/O.CON.KBUF.SV.W.0022.000000T0000Z-180619T0030Z/
Cattaraugus NY-Allegany NY-
800 PM EDT MON JUN 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHERN CATTARAUGUS AND ALLEGANY COUNTIES...

At 759 PM EDT, severe thunderstorms were located along a line
extending from near Cuba to Bradford to near Scandia, moving east at 
60 mph. A brief tornado remains possible along the leading edge of 
the line of thunderstorms.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Olean, Salamanca, Wellsville, Allegany State Park, Alfred, Allegany,
Franklinville and Belfast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7906 4217 7872 4242 7848 4229 7774
      4200 7775
TIME...MOT...LOC 2359Z 290DEG 50KT 4221 7837 4197 7867 4189 7907 

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

Church

535 
WWUS51 KBUF 190017
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
817 PM EDT MON JUN 18 2018

NYC003-009-190030-
/O.CON.KBUF.SV.W.0022.000000T0000Z-180619T0030Z/
Cattaraugus NY-Allegany NY-
817 PM EDT MON JUN 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHEASTERN CATTARAUGUS AND ALLEGANY COUNTIES...

At 816 PM EDT, severe thunderstorms were located along a line
extending from near Cuba to near Rew to 6 miles northeast of Kinzua 
Dam, moving east at 45 mph. The earlier brief tornado potential has 
diminished.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Olean, Wellsville, Alfred, Allegany, Cuba, St. Bonaventure,
Whitesville and Weston Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7862 4214 7846 4235 7826 4228 7774
      4200 7775
TIME...MOT...LOC 0016Z 286DEG 39KT 4221 7820 4197 7850 4189 7890 

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

Church

166 
WWUS51 KBUF 190033
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
833 PM EDT MON JUN 18 2018

NYC003-009-190042-
/O.EXP.KBUF.SV.W.0022.000000T0000Z-180619T0030Z/
Cattaraugus NY-Allegany NY-
833 PM EDT MON JUN 18 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CATTARAUGUS AND
ALLEGANY COUNTIES HAS EXPIRED...
    
The storms which prompted the warning has moved out of Cattaraugus 
County, therefore the warning has been allowed to expire there.
 
Remember, a new Severe Thunderstorm Warning has replaced this 
warning for Allegany County.

LAT...LON 4200 7862 4214 7846 4235 7826 4228 7774
      4200 7775
TIME...MOT...LOC 0032Z 290DEG 50KT 4214 7795 4190 7825 4182 7865 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 12:59 PM EDT	Special Marine Warning	BUF		61 min
Jun 18, 1:19 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	41 min
Jun 18, 1:20 PM EDT	Special Marine Warning	BUF		40 min
Jun 18, 1:35 PM EDT	Special Marine Warning	BUF		55 min
Jun 18, 2:10 PM EDT	Special Weather Statement	BUF	Lewis	35 min
Jun 18, 2:14 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	46 min
Jun 18, 2:16 PM EDT	Special Marine Warning	BUF		59 min
Jun 18, 2:32 PM EDT	Special Marine Warning	BUF		18 min
Jun 18, 2:39 PM EDT	Small Craft Advisory	BUF		3 hr
Jun 18, 2:40 PM EDT	Special Weather Statement	BUF	Erie	35 min
Jun 18, 3:56 PM EDT	Special Marine Warning	BUF		94 min
Jun 18, 6:00 PM EDT	Special Weather Statement	BUF	Livingston, Wyoming	60 min
Jun 18, 6:24 PM EDT	Special Marine Warning	BUF		66 min
Jun 18, 6:33 PM EDT	Special Weather Statement	BUF	Erie, Wyoming	57 min
Jun 18, 6:39 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	66 min
Jun 18, 6:45 PM EDT	Special Marine Warning	BUF		45 min

Nearby

Severe Thunderstorm Warnings in New York, 2018 Every severe thunderstorm warning in 2018

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.