Alert archive / New York / Tornado Warnings in 2017

Tornado Warning 4, NWS Buffalo, NY

July 23, 2017Ontario County, New York

NWS Buffalo, NY issued this tornado warning at Jul 23, 2017, 2:59 PM EDT for Ontario County, New York. It was in force for 31 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 23, 2017, 2:59 PM EDT (18:59 UTC)
Expired: Jul 23, 2017, 3:30 PM EDT
In force: 31 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 117 km from the middle of the area, began a volume at 19:02 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 23, 3:18 PM EDT	TSTM WND DMG	Canandaigua, NY	TREES DOWN IN CANANDAIGUA

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, 7.0 hours before the alert went out and 114 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: 1092 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

911 
WFUS51 KBUF 231859
TORBUF
NYC069-231930-
/O.NEW.KBUF.TO.W.0004.170723T1859Z-170723T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Buffalo NY
259 PM EDT SUN JUL 23 2017

The National Weather Service in Buffalo has issued a

* Tornado Warning for...
  North central Ontario County in western New York...

* Until 330 PM EDT.

* At 259 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Canandaigua, moving east at 10 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...
  Canandaigua and Shortsville. 

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.

&&

LAT...LON 4284 7738 4295 7739 4296 7719 4282 7717
TIME...MOT...LOC 1859Z 262DEG 8KT 4291 7734 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Wood

2 follow-up statements

124 
WWUS51 KBUF 231916
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
316 PM EDT SUN JUL 23 2017

NYC069-231930-
/O.CON.KBUF.TO.W.0004.000000T0000Z-170723T1930Z/
Ontario NY-
316 PM EDT SUN JUL 23 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM EDT FOR CENTRAL
ONTARIO COUNTY...
    
At 316 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Canandaigua, moving southeast at 10 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...
Canandaigua.

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 Canandaigua 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 4284 7738 4292 7738 4292 7721 4282 7720
TIME...MOT...LOC 1916Z 331DEG 9KT 4287 7731 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Wood

761 
WWUS51 KBUF 231930
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
330 PM EDT SUN JUL 23 2017

NYC069-231939-
/O.EXP.KBUF.TO.W.0004.000000T0000Z-170723T1930Z/
Ontario NY-
330 PM EDT SUN JUL 23 2017

...THE TORNADO WARNING FOR CENTRAL ONTARIO COUNTY WILL EXPIRE AT 330
PM EDT...
                
The storm which prompted the tornado warning no longer appears 
capable of producing a tornado. Therefore the warning will be 
allowed to expire.

However, a Severe Thunderstorm Warning still remains in effect for 
Central Ontario County until 430 PM EDT.

LAT...LON 4284 7738 4292 7738 4292 7721 4282 7720
TIME...MOT...LOC 1929Z 262DEG 8KT 4287 7727 

$$

Wood

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:31 AM EDT	Beach Hazards Statement	BUF	Monroe, Niagara, Orleans	18 hr
Jul 23, 4:31 AM EDT	Lakeshore Flood Watch	BUF	Monroe, Niagara, Orleans	5 hr
Jul 23, 4:32 AM EDT	Small Craft Advisory	BUF		24 hr
Jul 23, 9:57 AM EDT	Lakeshore Flood Warning	BUF	Monroe, Orleans	19 hr
Jul 23, 1:34 PM EDT	Special Weather Statement	BUF	Allegany	56 min
Jul 23, 2:12 PM EDT	Special Weather Statement	BUF	Ontario	63 min
Jul 23, 2:22 PM EDT	Special Weather Statement	BUF	Allegany	53 min
Jul 23, 2:34 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	56 min
Jul 23, 3:28 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	62 min
Jul 23, 3:30 PM EDT	Special Weather Statement	BUF	Genesee	60 min
Jul 23, 3:38 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Wyoming	41 min
Jul 23, 3:57 PM EDT	Flash Flood Warning	BUF	Ontario	3 hr
Jul 23, 4:15 PM EDT	Flash Flood Warning	BUF	Genesee, Wyoming	3 hr
Jul 23, 4:38 PM EDT	Special Weather Statement	BUF	Livingston	67 min
Jul 23, 4:59 PM EDT	Flash Flood Warning	BUF	Livingston, Ontario	4 hr
Jul 23, 5:32 PM EDT	Special Weather Statement	BUF	Niagara	88 min
Jul 23, 6:13 PM EDT	Special Marine Warning	BUF		62 min
Jul 23, 6:53 PM EDT	Areal Flood Warning	BUF	Ontario	12 hr

Nearby

Tornado Warnings in New York, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.