Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 29, NWS Buffalo, NY

July 5, 2018Erie County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 5, 2018, 4:43 PM EDT for Erie County, Wyoming County, New York. It was in force for 43 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 5, 2018, 4:43 PM EDT (20:43 UTC)
Expired: Jul 5, 2018, 5:26 PM EDT
In force: 43 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 38 km from the middle of the area, began a volume at 20:45 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 5, 4:48 PM EDT	TSTM WND DMG	Strykersville, NY	RT 78 AND STRYKERSVILLE, TREES DOWN.

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, 8.7 hours before the alert went out and 35 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: 868 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 770 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

312 
WUUS51 KBUF 052043
SVRBUF
NYC029-121-052145-
/O.NEW.KBUF.SV.W.0029.180705T2043Z-180705T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
443 PM EDT THU JUL 5 2018

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wyoming County in western New York...
  East central Erie County in western New York...

* Until 545 PM EDT..

* At 443 PM EDT, a severe thunderstorm was located near Varysburg, or
  11 miles east of East Aurora, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Warsaw, Bennington, Attica, Varysburg, Sheldon, Wyoming,
  Orangeville Center and Strykersville.

# 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 4261 7852 4276 7851 4286 7848 4286 7801
      4262 7828
TIME...MOT...LOC 2043Z 224DEG 16KT 4271 7842 

HAIL...0.75IN
WIND...60MPH
 
$$

RSH

2 follow-up statements

494 
WWUS51 KBUF 052114
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
514 PM EDT THU JUL 5 2018

NYC029-052123-
/O.CAN.KBUF.SV.W.0029.000000T0000Z-180705T2145Z/
Erie NY-
514 PM EDT THU JUL 5 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ERIE 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 4261 7844 4277 7844 4286 7843 4286 7801
      4262 7828
TIME...MOT...LOC 2113Z 217DEG 9KT 4260 7826 

$$

NYC121-052145-
/O.CON.KBUF.SV.W.0029.000000T0000Z-180705T2145Z/
Wyoming NY-
514 PM EDT THU JUL 5 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHWESTERN WYOMING COUNTY...

At 513 PM EDT, a severe thunderstorm was located 9 miles northeast 
of Arcade, or 15 miles west of Letchworth State Park, moving 
northeast at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Warsaw, Bennington, Attica, Varysburg, Sheldon, Wyoming, Orangeville
Center and Dale.

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 4261 7844 4277 7844 4286 7843 4286 7801
      4262 7828
TIME...MOT...LOC 2113Z 217DEG 9KT 4260 7826 

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

RSH

714 
WWUS51 KBUF 052126
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
526 PM EDT THU JUL 5 2018

NYC121-052136-
/O.CAN.KBUF.SV.W.0029.000000T0000Z-180705T2145Z/
Wyoming NY-
526 PM EDT THU JUL 5 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WYOMING COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However heavy rain is
still likely with this broad thunderstorm.

LAT...LON 4261 7844 4277 7844 4286 7843 4286 7801
      4262 7828
TIME...MOT...LOC 2117Z 224DEG 16KT 4264 7820 

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 3:44 PM EDT	Special Weather Statement	BUF	Livingston	31 min
Jul 5, 4:56 PM EDT	Small Craft Advisory	BUF		21 hr
Jul 5, 5:30 PM EDT	Flash Flood Warning	BUF	Wayne	3 hr
Jul 5, 6:21 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	54 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.