Alert archive / New York / Tornado Warnings in 2021

Tornado Warning 13, NWS New York, NY

November 13, 2021Suffolk County, New York

NWS New York, NY issued this tornado warning at Nov 13, 2021, 3:20 PM EST for Suffolk County, New York. It was in force for 25 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
Nov 13, 2021, 3:20 PM EST (20:20 UTC)
Expired
Nov 13, 2021, 3:45 PM EST
In force
25 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 26 km from the middle of the area, began a volume at 20:19 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
Nov 13, 3:20 PM ESTTSTM WND DMG1 S Islip Terrace, NYMULTIPLE TREES AND WIRES DOWN, HOUSES WITH TREE DAMAGE, ROADS BLOCKED BY FALLEN TREES SOUTH OF MONTAUK HIGHWAY.
Nov 13, 3:20 PM ESTTORNADOEast Islip, NYEF-0 WITH 85 MPH WINDS CONFIRMED IN EAST ISLIP WITH A FEW DOZEN LARGE TREES KNOCKED DOWN.
Nov 13, 3:30 PM ESTTSTM WND DMGEast Islip, NYLARGE BRANCHES, TREES, AND POWER LINES DOWN.
Nov 13, 3:40 PM ESTTORNADONorth Bellport, NYEF-0 WITH 85 MPH WINDS CONFIRMED IN NORTH BELLPORT CAUSING EXTENSIVE ROOF DAMAGE TO THE BROOKHAVEN RECYCLING CENTER.

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.

IssuedProductOfficeLasted
Nov 13, 12:27 PM ESTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.3 hours before the alert went out and 26 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 2021-11-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-11-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1435 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

357 
WFUS51 KOKX 132020
TOROKX
NYC103-132045-
/O.NEW.KOKX.TO.W.0013.211113T2020Z-211113T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
320 PM EST Sat Nov 13 2021

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  Western Suffolk County in southeastern New York...

* Until 345 PM EST.
    
* At 320 PM EST, a severe thunderstorm capable of producing a tornado
  was located over Islip, moving northeast at 50 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Ronkonkoma and Patchogue around 330 PM EST.
  Medford and Farmingville around 335 PM EST.

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.

Motorists should not take shelter under highway overpasses. If you
cannot safely drive away from the tornado, as a last resort, either
park your vehicle and stay put, or abandon your vehicle and lie down
in a low lying area and protect yourself from flying debris.

&&

LAT...LON 4073 7329 4087 7302 4076 7289 4074 7298
      4074 7301 4073 7302 4071 7309 4071 7311
      4070 7313 4069 7317 4070 7320 4069 7324
      4067 7323
TIME...MOT...LOC 2020Z 241DEG 44KT 4072 7321 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

MW
1 follow-up statement
421 
WWUS51 KOKX 132034
SVSOKX

Severe Weather Statement
National Weather Service New York NY
334 PM EST Sat Nov 13 2021

NYC103-132045-
/O.CON.KOKX.TO.W.0013.000000T0000Z-211113T2045Z/
Suffolk NY-
334 PM EST Sat Nov 13 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EST FOR WESTERN
SUFFOLK COUNTY...
    
At 334 PM EST, a severe thunderstorm capable of producing a tornado
was located over Medford, moving northeast at 50 mph.

HAZARD...Tornado and quarter size hail.

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 tornadic thunderstorm will remain over mainly rural areas of
western Suffolk County.

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.

Motorists should not take shelter under highway overpasses. If you
cannot safely drive away from the tornado, as a last resort, either
park your vehicle and stay put, or abandon your vehicle and lie down
in a low lying area and protect yourself from flying debris.

&&

LAT...LON 4073 7309 4076 7309 4077 7312 4078 7311
      4079 7312 4081 7310 4087 7302 4076 7289
      4074 7298 4074 7301 4073 7302
TIME...MOT...LOC 2034Z 241DEG 44KT 4080 7301 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

MW

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 13, 12:47 PM ESTSpecial Weather StatementOKXOrange88 min
Nov 13, 1:02 PM ESTSevere Thunderstorm WarningOKXOrange47 min
Nov 13, 1:26 PM ESTSevere Thunderstorm WarningOKXOrange, Putnam, Rockland, Westchester49 min
Nov 13, 1:48 PM ESTSevere Thunderstorm WarningOKXBronx, Kings, New York, Queens, Richmond42 min
Nov 13, 1:54 PM ESTSpecial Marine WarningOKX96 min
Nov 13, 2:11 PM ESTSpecial Weather StatementOKXPutnam49 min
Nov 13, 2:22 PM ESTSevere Thunderstorm WarningOKXKings, Nassau, Queens38 min
Nov 13, 2:47 PM ESTSpecial Marine WarningOKX58 min
Nov 13, 2:53 PM ESTTornado WarningOKXNassau, Suffolk37 min
Nov 13, 2:59 PM ESTSpecial Marine WarningOKX61 min
Nov 13, 3:18 PM ESTSpecial Weather StatementOKXSuffolk57 min
Nov 13, 3:36 PM ESTSpecial Marine WarningOKX54 min
Nov 13, 3:40 PM ESTTornado WarningOKXSuffolk24 min
Nov 13, 3:54 PM ESTSpecial Marine WarningOKX66 min
Nov 13, 3:57 PM ESTTornado WarningOKXSuffolk18 min
Nov 13, 4:07 PM ESTTornado WarningOKXSuffolk23 min
Nov 13, 4:11 PM ESTSpecial Marine WarningOKX47 min
Nov 13, 4:18 PM ESTSevere Thunderstorm WarningOKXSuffolk27 min
Nov 13, 4:30 PM ESTSevere Thunderstorm WarningOKXSuffolk30 min

Nearby

Tornado Warnings in New York, 2021Every tornado warning in 2021Tornadoes in 2021

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.