Alert archive / New York / Tornado Warnings in 2018

Tornado Warning 5, NWS New York, NY

October 2, 2018Rockland County, Westchester County, New York

NWS New York, NY issued this tornado warning at Oct 2, 2018, 4:12 PM EDT for Rockland County, Westchester County, New York. It was in force for 33 min. 2 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
Oct 2, 2018, 4:12 PM EDT (20:12 UTC)
Expired
Oct 2, 2018, 4:45 PM EDT
In force
33 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 101 km from the middle of the area, began a volume at 20:15 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

TimeReportWhereRemark
Oct 2, 4:14 PM EDTTORNADO1 Wsw Cedar Flats, NYSTORM SURVEY TEAM CONFIRMED AN EF1 TORNADO NEAR STONY POINT WITH ESTIMATED PEAK WINDS OF 100 MPH, A 100 YARD PATH WIDTH, AND A PATH LENGTH OF 1.52 MILES.
Oct 2, 4:20 PM EDTTSTM WND DMGStony Point, NYTREES DOWN ON WILDERNESS DRIVE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 101 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, Brookhaven, NY at 12:00Z on 2018-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 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, Brookhaven, NY at 12:00Z on 2018-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.193958Sfc1 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
54 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

688 
WFUS51 KOKX 022012
TOROKX
NYC087-119-022045-
/O.NEW.KOKX.TO.W.0005.181002T2012Z-181002T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
412 PM EDT TUE OCT 2 2018

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  Northern Westchester County in southeastern New York...
  Rockland County in southeastern New York...

* Until 445 PM EDT.
    
* At 412 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Pomona, or 7 miles northwest of Haverstraw, moving
  east at 15 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 dangerous storm will be near...
  Peekskill around 445 PM EDT.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4119 7384 4119 7412 4122 7412 4132 7399
      4133 7385
TIME...MOT...LOC 2012Z 259DEG 14KT 4125 7407 

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

$$

Goodman
1 follow-up statement
666 
WWUS51 KOKX 022031
SVSOKX

Severe Weather Statement
National Weather Service New York NY
431 PM EDT TUE OCT 2 2018

NYC087-119-022045-
/O.CON.KOKX.TO.W.0005.000000T0000Z-181002T2045Z/
Westchester NY-Rockland NY-
431 PM EDT TUE OCT 2 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR NORTHERN
WESTCHESTER AND ROCKLAND COUNTIES...
    
At 431 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Haverstraw, moving east at 15 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...
Peekskill, Stony Point, West Haverstraw, Croton-on-Hudson, Mount Ivy,
Thiells and Buchanan.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4119 7384 4119 7403 4124 7403 4129 7395
      4132 7385
TIME...MOT...LOC 2031Z 273DEG 15KT 4123 7392 

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

$$

Goodman

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 2, 2:27 PM EDTSpecial Weather StatementOKXOrange63 min
Oct 2, 3:21 PM EDTSpecial Weather StatementOKXOrange39 min
Oct 2, 4:00 PM EDTSpecial Weather StatementOKXRockland, Westchester60 min
Oct 2, 4:43 PM EDTTornado WarningOKXWestchester32 min
Oct 2, 5:35 PM EDTSpecial Marine WarningOKX28 min
Oct 2, 6:12 PM EDTSpecial Weather StatementOKXWestchester63 min
Oct 2, 6:23 PM EDTAreal Flood AdvisoryOKXOrange, Putnam, Rockland, Westchester3 hr
Oct 2, 6:43 PM EDTSevere Thunderstorm WarningOKXWestchester47 min
Oct 2, 6:49 PM EDTFlash Flood WarningOKXOrange, Rockland, Westchester3 hr
Oct 2, 6:59 PM EDTSpecial Marine WarningOKX31 min
Oct 2, 7:25 PM EDTSpecial Marine WarningOKX50 min
Oct 2, 7:36 PM EDTSevere Thunderstorm WarningOKXSuffolk24 min
Oct 2, 7:58 PM EDTSpecial Marine WarningOKX47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.