Alert archive / New York / Tornado Warnings in 2018

Tornado Warning 1, NWS Buffalo, NY

August 21, 2018Cattaraugus County, New York

NWS Buffalo, NY issued this tornado warning at Aug 21, 2018, 7:09 PM EDT for Cattaraugus County, New York. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 21, 2018, 7:09 PM EDT (23:09 UTC)
Expired: Aug 21, 2018, 7:45 PM EDT
In force: 36 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 98 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.2 hours before the alert went out and 96 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: 103 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 790 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

668 
WFUS51 KBUF 212309
TORBUF
NYC009-212345-
/O.NEW.KBUF.TO.W.0001.180821T2309Z-180821T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Buffalo NY
709 PM EDT TUE AUG 21 2018

The National Weather Service in Buffalo has issued a

* Tornado Warning for...
  Southwestern Cattaraugus County in western New York...

* Until 745 PM EDT..

* At 709 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Allegany State Park, moving northeast at 20 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...
  Salamanca, Allegany State Park, Carrollton, Vandalia, Steamburg and
  Kill Buck.

This includes Interstate 86 between exits 17 and 23.
 
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 4200 7891 4207 7897 4227 7872 4208 7852
      4200 7888
TIME...MOT...LOC 2309Z 236DEG 20KT 4206 7888 

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

$$

HSK

4 follow-up statements

791 
WWUS51 KBUF 212318
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
718 PM EDT TUE AUG 21 2018

NYC009-212345-
/O.CON.KBUF.TO.W.0001.000000T0000Z-180821T2345Z/
Cattaraugus NY-
718 PM EDT TUE AUG 21 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
SOUTHWESTERN CATTARAUGUS COUNTY...
    
At 718 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Allegany State Park, moving northeast at 25 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...
Salamanca, Allegany State Park, Carrollton, Vandalia, Steamburg and
Kill Buck.

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 4210 7893 4227 7872 4208 7852 4201 7885
TIME...MOT...LOC 2318Z 236DEG 20KT 4209 7882 

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

$$

HSK

094 
WWUS51 KBUF 212325
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
725 PM EDT TUE AUG 21 2018

NYC009-212345-
/O.CON.KBUF.TO.W.0001.000000T0000Z-180821T2345Z/
Cattaraugus NY-
725 PM EDT TUE AUG 21 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR SOUTH
CENTRAL CATTARAUGUS COUNTY...
    
At 725 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Allegany State Park, moving northeast at 25 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...
Salamanca, Allegany State Park, Carrollton, Vandalia and Kill Buck. 

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 4210 7888 4227 7872 4208 7852 4205 7881
TIME...MOT...LOC 2325Z 236DEG 20KT 4211 7878 

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

$$

HSK

765 
WWUS51 KBUF 212336
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
736 PM EDT TUE AUG 21 2018

NYC009-212345-
/O.CON.KBUF.TO.W.0001.000000T0000Z-180821T2345Z/
Cattaraugus NY-
736 PM EDT TUE AUG 21 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR SOUTH
CENTRAL CATTARAUGUS COUNTY...
    
At 735 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Salamanca, moving northeast at 25 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. 

This includes Interstate 86 between exits 17 and 21.

Locations impacted include...
Salamanca, Allegany State Park, Carrollton, Vandalia and Kill Buck. 

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 4210 7888 4227 7872 4208 7852 4205 7881
TIME...MOT...LOC 2335Z 236DEG 20KT 4214 7872 

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

$$

HSK

475 
WWUS51 KBUF 212342
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
742 PM EDT TUE AUG 21 2018

NYC009-212352-
/O.EXP.KBUF.TO.W.0001.000000T0000Z-180821T2345Z/
Cattaraugus NY-
742 PM EDT TUE AUG 21 2018

...THE TORNADO WARNING FOR SOUTH CENTRAL CATTARAUGUS COUNTY WILL
EXPIRE AT 745 PM EDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

LAT...LON 4210 7888 4227 7872 4208 7852 4205 7881
TIME...MOT...LOC 2342Z 236DEG 20KT 4216 7868 

$$

HSK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 4:45 AM EDT	Small Craft Advisory	BUF		45 hr
Aug 21, 4:07 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	53 min
Aug 21, 4:59 PM EDT	Special Weather Statement	BUF	Cattaraugus	31 min
Aug 21, 5:06 PM EDT	Special Weather Statement	BUF	Chautauqua	24 min
Aug 21, 5:20 PM EDT	Special Marine Warning	BUF		85 min
Aug 21, 5:32 PM EDT	Special Weather Statement	BUF	Chautauqua	43 min
Aug 21, 5:54 PM EDT	Special Weather Statement	BUF	Niagara	36 min
Aug 21, 6:03 PM EDT	Severe Thunderstorm Warning	BUF	Niagara	27 min
Aug 21, 6:12 PM EDT	Special Marine Warning	BUF		63 min
Aug 21, 6:21 PM EDT	Special Marine Warning	BUF		54 min
Aug 21, 6:26 PM EDT	Special Weather Statement	BUF	Niagara	64 min
Aug 21, 6:38 PM EDT	Special Marine Warning	BUF		97 min
Aug 21, 6:38 PM EDT	Special Weather Statement	BUF	Cattaraugus	37 min
Aug 21, 6:54 PM EDT	Special Weather Statement	BUF	Chautauqua	36 min
Aug 21, 6:57 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus	63 min
Aug 21, 7:59 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.