Alert archive / New York / Tornado Warnings in 2018

Tornado Warning 4, NWS Buffalo, NY

September 26, 2018Allegany County, Cattaraugus County, New York

NWS Buffalo, NY issued this tornado warning at Sep 26, 2018, 7:30 AM EDT for Allegany County, Cattaraugus County, New York. It was in force for 17 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
Sep 26, 2018, 7:30 AM EDT (11:30 UTC)
Expired
Sep 26, 2018, 7:47 AM EDT
In force
17 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Allegany County, NY, Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 79 km from the middle of the area, began a volume at 11:30 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 00:00Z, 11.5 hours before the alert went out and 76 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 00:00Z on 2018-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 2018-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
47 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

920 
WFUS51 KBUF 261130
TORBUF
NYC003-009-261200-
/O.NEW.KBUF.TO.W.0004.180926T1130Z-180926T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Buffalo NY
730 AM EDT WED SEP 26 2018

The National Weather Service in Buffalo has issued a

* Tornado Warning for...
  East central Cattaraugus County in western New York...
  Northwestern Allegany County in western New York...

* Until 800 AM EDT..

* At 730 AM EDT, a severe thunderstorm capable of producing a tornado
  was located near Rushford, or 18 miles north of Olean, moving
  northeast at 35 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...
  Belfast, Rushford, Houghton, Caneadea, Angelica, Lyndon, Black
  Creek, Hardy Corners and Fillmore.

This includes Interstate 86 near exit 31.
 
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 4226 7837 4235 7840 4251 7813 4228 7800
TIME...MOT...LOC 1130Z 245DEG 29KT 4233 7833 

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

$$

HSK
2 follow-up statements
012 
WWUS51 KBUF 261138
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
738 AM EDT WED SEP 26 2018

NYC009-261148-
/O.CAN.KBUF.TO.W.0004.000000T0000Z-180926T1200Z/
Cattaraugus NY-
738 AM EDT WED SEP 26 2018

...THE TORNADO WARNING FOR EAST CENTRAL CATTARAUGUS COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4231 7830 4239 7830 4251 7813 4228 7800
TIME...MOT...LOC 1138Z 245DEG 29KT 4236 7825 

$$

NYC003-261200-
/O.CON.KBUF.TO.W.0004.000000T0000Z-180926T1200Z/
Allegany NY-
738 AM EDT WED SEP 26 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 AM EDT FOR
NORTHWESTERN ALLEGANY COUNTY...
    
At 738 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Rushford, or 21 miles northeast of Olean, moving
northeast at 35 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...
Belfast, Rushford, Houghton, Caneadea, Angelica and Fillmore. 

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 4231 7830 4239 7830 4251 7813 4228 7800
TIME...MOT...LOC 1138Z 245DEG 29KT 4236 7825 

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

$$

HSK
730 
WWUS51 KBUF 261147
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
747 AM EDT WED SEP 26 2018

NYC003-261157-
/O.CAN.KBUF.TO.W.0004.000000T0000Z-180926T1200Z/
Allegany NY-
747 AM EDT WED SEP 26 2018

...THE TORNADO WARNING FOR NORTHWESTERN ALLEGANY COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

LAT...LON 4231 7830 4239 7830 4251 7813 4228 7800
TIME...MOT...LOC 1145Z 245DEG 29KT 4239 7816 

$$

HSK

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 9:57 PM EDTBeach Hazards StatementBUFCayuga, Chautauqua, Erie, Jefferson, Monroe, Niagara and 3 more22 hr
Sep 26, 6:59 AM EDTSpecial Weather StatementBUFAllegany46 min
Sep 26, 7:26 AM EDTSpecial Weather StatementBUFAllegany34 min

Nearby

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