Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 23, NWS Buffalo, NY

June 18, 2018Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2018, 8:30 PM EDT for Allegany County, New York. It was in force for 45 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: Jun 18, 2018, 8:30 PM EDT (00:30 UTC)
Expired: Jun 18, 2018, 9:15 PM EDT
In force: 45 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 109 km from the middle of the area, began a volume at 00:33 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, 8:41 PM EDT	TSTM WND DMG	3 W Alma, NY	DELAYED REPORT. TREE DOWN ACROSS ROUTE 18. TIME ESTIMATED FROM RADAR.
Jun 18, 8:46 PM EDT	TSTM WND DMG	Wellsville, NY	DELAYED REPORT. TREE DOWN IN WELLSVILLE. TIME ESTIAMTED FROM RADAR.

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, 0.5 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 958 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

009 
WUUS51 KBUF 190030
SVRBUF
NYC003-190115-
/O.NEW.KBUF.SV.W.0023.180619T0030Z-180619T0115Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southern Allegany County in western New York...

* Until 915 PM EDT..

* At 829 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles southeast of Belfast to near Shinglehouse, 
  moving east at 50 mph. This replaces the previous warning in 
  effect for Allegany County.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wellsville, Alfred, Whitesville, Friendship, Scio, Bolivar, Andover
  and Belmont.

# 

This includes Interstate 86 between exits 30 and 31.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7831 4232 7803 4228 7774 4200 7775
TIME...MOT...LOC 0029Z 278DEG 41KT 4229 7799 4198 7824 

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

Church

2 follow-up statements

237 
WWUS51 KBUF 190056
SVSBUF

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

NYC003-190115-
/O.CON.KBUF.SV.W.0023.000000T0000Z-180619T0115Z/
Allegany NY-
856 PM EDT MON JUN 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHEASTERN ALLEGANY COUNTY...

At 856 PM EDT, severe thunderstorms were located along a line
extending from near Hartsville to near Genesee, moving east at 40
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Whitesville, Andover, Paynesville and Stannards. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7794 4217 7783 4217 7774 4200 7775
TIME...MOT...LOC 0056Z 279DEG 36KT 4224 7765 4194 7790 

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

Church

754 
WWUS51 KBUF 190105
SVSBUF

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

NYC003-190115-
/O.EXP.KBUF.SV.W.0023.000000T0000Z-180619T0115Z/
Allegany NY-
905 PM EDT MON JUN 18 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALLEGANY COUNTY
WILL EXPIRE AT 915 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4200 7794 4217 7783 4217 7774 4200 7775
TIME...MOT...LOC 0105Z 278DEG 41KT 4223 7753 4193 7778 

$$

Church

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.