Alert archive / New York / Tornado Warnings in 2018

Tornado Warning 3, NWS Buffalo, NY

September 21, 2018Ontario County, New York

NWS Buffalo, NY issued this tornado warning at Sep 21, 2018, 7:07 PM EDT for Ontario County, New York. It was in force for 23 min. 4 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: Sep 21, 2018, 7:07 PM EDT (23:07 UTC)
Expired: Sep 21, 2018, 7:30 PM EDT
In force: 23 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Ontario County, NY

The radar

The Binghamton radar (KBGM), 118 km from the middle of the area, began a volume at 23:08 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
Sep 21, 7:07 PM EDT	TSTM WND DMG	Bloomfield, NY	TREE AND WIRES DOWN WEST MAIN.
Sep 21, 7:09 PM EDT	TSTM WND DMG	1 E Bloomfield, NY	LARGE TREE DOWN.
Sep 21, 7:10 PM EDT	TSTM WND DMG	2 Ese Holcomb, NY	MOBILE SIGNAGE AND RECREATIONAL DEVICES OVERTURNED
Sep 21, 7:12 PM EDT	TSTM WND DMG	1 W Canandaigua, NY	TREES AND LIMBS DOWN ALONG BUFFALO ST EXT AND N PEARL ST

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
Sep 21, 4:50 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.1 hours before the alert went out and 129 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: 445 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

327 
WFUS51 KBUF 212307
TORBUF
NYC069-212330-
/O.NEW.KBUF.TO.W.0003.180921T2307Z-180921T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Buffalo NY
707 PM EDT FRI SEP 21 2018

The National Weather Service in Buffalo has issued a

* Tornado Warning for...
  Northeastern Ontario County in western New York...

* Until 730 PM EDT..

* At 705 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Bloomfield, or near Canandaigua, moving east at 50
  mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Geneva, Canandaigua, Bristol, Clifton Springs, Phelps, Gorham, and 
  East Bloomfield.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

If on or near Northern Canandaigua Lake or Northern Seneca Lake, get 
away from the water and move to safe shelter immediately. If you can 
hear thunder, you are close enough to be struck by lightning. Severe 
thunderstorms can produce large capsizing waves, even on small 
bodies of water. Move into dock and seek safe shelter now! Do not be 
caught on the water in a thunderstorm.

&&

LAT...LON 4282 7745 4293 7746 4300 7696 4287 7696
      4287 7698 4286 7698 4284 7697 4278 7697
      4278 7698
TIME...MOT...LOC 2305Z 267DEG 45KT 4288 7740 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Zaff

2 follow-up statements

541 
WWUS51 KBUF 212318
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
718 PM EDT FRI SEP 21 2018

NYC069-212330-
/O.CON.KBUF.TO.W.0003.000000T0000Z-180921T2330Z/
Ontario NY-
718 PM EDT FRI SEP 21 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
NORTHEASTERN ONTARIO COUNTY...
    
At 716 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Canandaigua, moving east at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Geneva, Canandaigua, Clifton Springs, Phelps, Gorham, Shortsville,
Seneca Castle, Seneca Lake State Park, Hall and West Junius.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

If on or near Northern Canandaigua Lake or Northern Seneca Lake, get 
away from the water and move to safe shelter immediately. If you can 
hear thunder, you are close enough to be struck by lightning. Severe 
thunderstorms can produce large capsizing waves, even on small 
bodies of water. Move into dock and seek safe shelter now! Do not be 
caught on the water in a thunderstorm.

&&

LAT...LON 4282 7729 4294 7729 4300 7696 4287 7696
      4287 7698 4286 7698 4284 7697 4278 7697
      4278 7698
TIME...MOT...LOC 2316Z 267DEG 45KT 4289 7720 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Thomas

524 
WWUS51 KBUF 212333
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
733 PM EDT FRI SEP 21 2018

NYC069-212342-
/O.EXP.KBUF.TO.W.0003.000000T0000Z-180921T2330Z/
Ontario NY-
733 PM EDT FRI SEP 21 2018

...THE TORNADO WARNING FOR NORTHEASTERN ONTARIO COUNTY HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
western New York.

LAT...LON 4282 7729 4294 7729 4300 7696 4287 7696
      4287 7698 4286 7698 4284 7697 4278 7697
      4278 7698
TIME...MOT...LOC 2332Z 267DEG 45KT 4290 7692 

$$

Thomas

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 10:00 PM EDT	Beach Hazards Statement	BUF	Chautauqua, Erie, Jefferson, Niagara, Orleans	22 hr
Sep 21, 4:45 PM EDT	Special Marine Warning	BUF		60 min
Sep 21, 5:15 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	45 min
Sep 21, 5:22 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	38 min
Sep 21, 5:27 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	48 min
Sep 21, 5:54 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	66 min
Sep 21, 6:31 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Wayne, Wyoming	59 min
Sep 21, 6:38 PM EDT	Special Marine Warning	BUF		70 min
Sep 21, 6:48 PM EDT	Tornado Warning	BUF	Allegany, Cattaraugus	42 min
Sep 21, 6:51 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	54 min
Sep 21, 7:29 PM EDT	Special Marine Warning	BUF		46 min

Nearby

Tornado Warnings in New York, 2018 Every tornado warning in 2018 Tornadoes 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.