Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 2, NWS Buffalo, NY

May 4, 2018Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 4, 2018, 3:35 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 55 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 4, 2018, 3:35 PM EDT (19:35 UTC)
Expired: May 4, 2018, 4:30 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Buffalo radar (KBUF), 87 km from the middle of the area, began a volume at 19:37 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 4, 4:02 PM EDT	TSTM WND DMG	1 Sw Jamestown, NY	LARGE TREE DOWN ON GLASGOW AVE
May 4, 4:10 PM EDT	TSTM WND DMG	Frewsburg, NY	ROOF BLOWN OFF HOUSE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 4, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.6 hours before the alert went out and 87 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: 4 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 682 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

421 
WUUS51 KBUF 041935
SVRBUF
NYC009-013-029-042030-
/O.NEW.KBUF.SV.W.0002.180504T1935Z-180504T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
335 PM EDT FRI MAY 4 2018

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Cattaraugus County in western New York...
  Southern Erie County in western New York...
  Chautauqua County in western New York...

* Until 430 PM EDT.

* At 334 PM EDT, a severe thunderstorm was located near Findley Lake,
  or 14 miles east of Erie, moving east at 65 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect wind damage to trees and power lines. 

* Locations impacted include...
  Jamestown, Dunkirk, Fredonia, Salamanca, Allegany State Park,
  Boston, Springville and Westfield.

This includes the following highways...
 Interstate 90 between exits 61 and 59.
 Interstate 86 between exits 4 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4237 7966 4264 7876 4248 7841 4200 7855
      4200 7976 4227 7976 4228 7973 4231 7977
TIME...MOT...LOC 1934Z 252DEG 57KT 4209 7985 

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

Church

2 follow-up statements

731 
WWUS51 KBUF 042004
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
404 PM EDT FRI MAY 4 2018

NYC029-042013-
/O.CAN.KBUF.SV.W.0002.000000T0000Z-180504T2030Z/
Erie NY-
404 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN 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 900 PM EDT for
western New York.

LAT...LON 4221 7976 4229 7951 4252 7851 4248 7841
      4200 7855 4200 7976
TIME...MOT...LOC 2003Z 252DEG 57KT 4223 7925 

$$

NYC009-013-042030-
/O.CON.KBUF.SV.W.0002.000000T0000Z-180504T2030Z/
Cattaraugus NY-Chautauqua NY-
404 PM EDT FRI MAY 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CATTARAUGUS AND CHAUTAUQUA COUNTIES...

At 403 PM EDT, a severe thunderstorm was located 8 miles north of
Falconer, or 9 miles north of Jamestown, moving east at 65 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect wind damage to trees and power lines. 

Locations impacted include...
Jamestown, Salamanca, Allegany State Park, Lakewood, Falconer,
Ashford, Franklinville and Mayville.

This includes Interstate 86 between exits 4 and 23.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4221 7976 4229 7951 4252 7851 4248 7841
      4200 7855 4200 7976
TIME...MOT...LOC 2003Z 252DEG 57KT 4223 7925 

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

Church

741 
WWUS51 KBUF 042030
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
430 PM EDT FRI MAY 4 2018

NYC009-013-042039-
/O.EXP.KBUF.SV.W.0002.000000T0000Z-180504T2030Z/
Cattaraugus NY-Chautauqua NY-
430 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR CATTARAUGUS AND CHAUTAUQUA
COUNTIES WILL EXPIRE AT 430 PM EDT...
                
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 will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 900 PM EDT for
western New York.

LAT...LON 4221 7976 4229 7951 4252 7851 4248 7841
      4200 7855 4200 7976
TIME...MOT...LOC 2029Z 252DEG 57KT 4235 7873 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 12:20 AM EDT	Dense Fog Advisory	BUF	Erie, Jefferson, Niagara	5 hr
May 4, 3:58 AM EDT	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	19 hr
May 4, 4:02 AM EDT	Gale Warning	BUF		16 hr
May 4, 2:18 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	57 min
May 4, 4:04 PM EDT	High Wind Warning	BUF	Erie, Genesee, Jefferson, Lewis, Niagara, Orleans	7 hr
May 4, 4:05 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	40 min
May 4, 4:10 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans, Wayne	35 min
May 4, 4:27 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	33 min
May 4, 4:46 PM EDT	Special Marine Warning	BUF		59 min
May 4, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	22 min
May 4, 4:59 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Lewis, Oswego	61 min
May 4, 5:32 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	58 min
May 4, 5:44 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	61 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.