Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 27, NWS Buffalo, NY

July 2, 2018Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 2, 2018, 4:13 PM EDT for Allegany County, New York. It was in force for 47 min. 1 report 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: Jul 2, 2018, 4:13 PM EDT (20:13 UTC)
Expired: Jul 2, 2018, 5:00 PM EDT
In force: 47 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), 103 km from the middle of the area, began a volume at 20:13 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
Jul 2, 4:38 PM EDT	TSTM WND DMG	3 Sw Almond, NY	TREE BRANCH DOWN ON ROAD.

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, 8.2 hours before the alert went out and 100 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: 1185 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

766 
WUUS51 KBUF 022013
SVRBUF
NYC003-022115-
/O.NEW.KBUF.SV.W.0027.180702T2013Z-180702T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
413 PM EDT MON JUL 2 2018

The National Weather Service in Buffalo has issued a

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

* Until 515 PM EDT..

* At 412 PM EDT, a severe thunderstorm was located 8 miles west of
  Wellsville, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

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

# 

This includes Interstate 86 between exits 29 and 33.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4206 7817 4218 7819 4228 7807 4241 7773
      4215 7774
TIME...MOT...LOC 2012Z 244DEG 17KT 4214 7811 

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

Apffel

2 follow-up statements

116 
WWUS51 KBUF 022037
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
437 PM EDT MON JUL 2 2018

NYC003-022115-
/O.CON.KBUF.SV.W.0027.000000T0000Z-180702T2115Z/
Allegany NY-
437 PM EDT MON JUL 2 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN ALLEGANY COUNTY...

At 437 PM EDT, a severe thunderstorm was located near Wellsville,
moving northeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Wellsville, Alfred, Scio, Bolivar, Andover, Belmont, Almond and West
Almond.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4206 7817 4217 7808 4230 7800 4241 7773
      4215 7774
TIME...MOT...LOC 2037Z 244DEG 17KT 4219 7797 

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

Apffel

337 
WWUS51 KBUF 022100
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
500 PM EDT MON JUL 2 2018

NYC003-022107-
/O.CAN.KBUF.SV.W.0027.000000T0000Z-180702T2115Z/
Allegany NY-
500 PM EDT MON JUL 2 2018

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

LAT...LON 4206 7817 4217 7808 4230 7800 4241 7773
      4215 7774
TIME...MOT...LOC 2057Z 244DEG 17KT 4223 7785 

$$

Apffel

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 12:45 PM EDT	Special Weather Statement	BUF	Wayne	30 min
Jul 2, 12:54 PM EDT	Special Marine Warning	BUF		66 min
Jul 2, 12:59 PM EDT	Special Weather Statement	BUF	Chautauqua	31 min
Jul 2, 1:28 PM EDT	Special Weather Statement	BUF	Chautauqua	32 min
Jul 2, 1:35 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	2 hr
Jul 2, 1:57 PM EDT	Special Weather Statement	BUF	Wayne	48 min
Jul 2, 2:19 PM EDT	Special Weather Statement	BUF	Cayuga	41 min
Jul 2, 2:28 PM EDT	Special Marine Warning	BUF		49 min
Jul 2, 2:33 PM EDT	Special Weather Statement	BUF	Cattaraugus	27 min
Jul 2, 2:37 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	43 min
Jul 2, 2:55 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	117 min
Jul 2, 3:25 PM EDT	Flash Flood Warning	BUF	Cayuga	112 min
Jul 2, 3:30 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	60 min
Jul 2, 3:55 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	49 min
Jul 2, 6:09 PM EDT	Special Weather Statement	BUF	Wayne	51 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.