Alert archive / New York / Tornado Warnings in 2020

Tornado Warning 8, NWS New York, NY

November 15, 2020Suffolk County, New York

NWS New York, NY issued this tornado warning at Nov 15, 2020, 9:29 PM EST for Suffolk County, New York. It was in force for 31 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: Nov 15, 2020, 9:29 PM EST (02:29 UTC)
Expired: Nov 15, 2020, 10:00 PM EST
In force: 31 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 9 km from the middle of the area, began a volume at 02:28 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
Nov 15, 9:55 PM EST	TSTM WND DMG	Calverton, NY	TREES DOWN ON LAUREN RD, JAKES LN, AND MIDDLE COUNTRY RD. TIME ESTIMATED FROM RADAR.
Nov 15, 10:00 PM EST	TSTM WND DMG	Lake Ronkonkoma, NY	TREES SNAPPED AND UPROOTED ON OCEAN AVE.

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.

Issued	Product	Office	Lasted
Nov 15, 7:32 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 2.5 hours before the alert went out and 9 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: 633 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 741 m²/s²
0-3 km storm-relative helicity: 834 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

291 
WFUS51 KOKX 160229
TOROKX
NYC103-160300-
/O.NEW.KOKX.TO.W.0008.201116T0229Z-201116T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
929 PM EST Sun Nov 15 2020

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  West central Suffolk County in southeastern New York...

* Until 1000 PM EST.
    
* At 928 PM EST, a severe thunderstorm capable of producing a tornado
  was located over Ronkonkoma, moving east at 50 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...
  Medford and Coram around 935 PM EST.
  Middle Island and Yaphank around 940 PM EST.
  Brookhaven National Laboratory around 945 PM EST.
  Manorville and Wading River around 950 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.

&&

LAT...LON 4086 7322 4099 7277 4099 7274 4083 7269
      4077 7318
TIME...MOT...LOC 0228Z 255DEG 45KT 4083 7312 

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

$$

FEB

1 follow-up statement

158 
WWUS51 KOKX 160244
SVSOKX

Severe Weather Statement
National Weather Service New York NY
944 PM EST Sun Nov 15 2020

NYC103-160300-
/O.CON.KOKX.TO.W.0008.000000T0000Z-201116T0300Z/
Suffolk NY-
944 PM EST Sun Nov 15 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM EST FOR CENTRAL
SUFFOLK COUNTY...
    
At 944 PM EST, a severe thunderstorm capable of producing a tornado
was located over Brookhaven National Laboratory, or near Manorville,
moving east at 50 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...
  Calverton around 950 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.

&&

LAT...LON 4080 7295 4093 7298 4099 7277 4099 7274
      4083 7269
TIME...MOT...LOC 0244Z 255DEG 45KT 4088 7286 

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

$$

FEB

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 15, 7:17 PM EST	Severe Thunderstorm Warning	OKX	Orange	43 min
Nov 15, 7:57 PM EST	Severe Thunderstorm Warning	OKX	Bronx, Kings, New York, Orange, Putnam, Queens and 3 more	63 min
Nov 15, 8:00 PM EST	Special Marine Warning	OKX		60 min
Nov 15, 8:36 PM EST	Tornado Warning	OKX	Bronx, New York, Westchester	24 min
Nov 15, 8:41 PM EST	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Putnam, Queens and 2 more	64 min
Nov 15, 8:44 PM EST	Tornado Warning	OKX	Putnam, Westchester	31 min
Nov 15, 8:48 PM EST	Special Marine Warning	OKX		57 min
Nov 15, 8:50 PM EST	Special Marine Warning	OKX		55 min
Nov 15, 9:39 PM EST	Severe Thunderstorm Warning	OKX	Suffolk	51 min
Nov 15, 9:47 PM EST	Special Marine Warning	OKX		58 min
Nov 15, 9:49 PM EST	Special Marine Warning	OKX		56 min
Nov 15, 10:27 PM EST	Severe Thunderstorm Warning	OKX	Suffolk	33 min
Nov 15, 10:34 PM EST	Special Marine Warning	OKX		56 min
Nov 16, 3:59 AM EST	Small Craft Advisory	OKX		24 hr
Nov 16, 3:46 PM EST	Freeze Watch	OKX	Bronx, Kings, New York, Queens	23 hr
Nov 16, 6:57 PM EST	Small Craft Advisory	OKX		54 hr

Nearby

Tornado Warnings in New York, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.