Alert archive / New York / Tornado Warnings in 2020

Tornado Warning 7, NWS New York, NY

November 15, 2020Greater Bridgeport Planning Region, Connecticut; Putnam County, Westchester County, New York

NWS New York, NY issued this tornado warning at Nov 15, 2020, 8:44 PM EST for Greater Bridgeport Planning Region, Connecticut; Putnam County, Westchester County, New York. It was in force for 31 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: Nov 15, 2020, 8:44 PM EST (01:44 UTC)
Expired: Nov 15, 2020, 9:15 PM EST
In force: 31 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Greater Bridgeport Planning Region, CT, Putnam County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 75 km from the middle of the area, began a volume at 01:47 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 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, 1.7 hours before the alert went out and 75 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.

065 
WFUS51 KOKX 160144
TOROKX
CTC001-NYC079-119-160215-
/O.NEW.KOKX.TO.W.0007.201116T0144Z-201116T0215Z/

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

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  Central Fairfield County in southern Connecticut...
  Northern Westchester County in southeastern New York...
  Eastern Putnam County in southeastern New York...

* Until 915 PM EST.

* At 843 PM EST, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located over
  Yorktown Heights, or near Mahopac, moving northeast 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.

* These dangerous storms will be near...
  Brewster around 855 PM EST.
  Ridgefield around 900 PM EST.
  Danbury and Bethel around 910 PM EST.
  Newtown around 915 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4149 7344 4151 7339 4149 7337 4147 7332
      4147 7330 4145 7330 4145 7327 4143 7326
      4144 7325 4143 7324 4143 7322 4141 7319
      4139 7318 4138 7316 4138 7318 4123 7379
      4132 7385 4153 7345
TIME...MOT...LOC 0143Z 244DEG 44KT 4131 7376 

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

$$

Goodman

3 follow-up statements

441 
WWUS51 KOKX 160153
SVSOKX

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

CTC001-NYC079-119-160215-
/O.CON.KOKX.TO.W.0007.000000T0000Z-201116T0215Z/
Fairfield CT-Westchester NY-Putnam NY-
853 PM EST Sun Nov 15 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EST FOR CENTRAL
FAIRFIELD...NORTHERN WESTCHESTER AND EASTERN PUTNAM COUNTIES...

At 852 PM EST, a squall line capable of producing both tornadoes and 
extensive straight line wind damage was located near Brewster, 
moving northeast 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.

These dangerous storms will be near...
  Danbury and Bethel around 910 PM EST.
  Newtown around 915 PM EST.
  Monroe around 920 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4149 7344 4151 7339 4149 7337 4147 7332
      4147 7330 4145 7330 4145 7327 4143 7326
      4144 7325 4143 7324 4143 7322 4141 7319
      4139 7318 4138 7316 4138 7318 4126 7365
      4134 7371 4153 7345
TIME...MOT...LOC 0152Z 245DEG 43KT 4135 7362 

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

$$

Goodman

358 
WWUS51 KOKX 160203
SVSOKX

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

NYC079-119-160212-
/O.CAN.KOKX.TO.W.0007.000000T0000Z-201116T0215Z/
Westchester NY-Putnam NY-
903 PM EST Sun Nov 15 2020

...THE TORNADO WARNING FOR NORTHERN WESTCHESTER AND EASTERN PUTNAM
COUNTIES IS CANCELLED...
    
The thunderstorm which prompted the warning has moved out of the 
area. Therefore, the warning has been cancelled. 

A Severe Thunderstorm Watch remains in effect until 200 AM EST. 

LAT...LON 4132 7347 4139 7352 4149 7336 4147 7332
      4147 7330 4145 7330 4145 7327 4143 7326
      4144 7325 4143 7324 4143 7322 4141 7319
      4139 7318 4138 7316 4138 7318 4135 7331
TIME...MOT...LOC 0202Z 245DEG 58KT 4141 7339 

$$

CTC001-160215-
/O.CON.KOKX.TO.W.0007.000000T0000Z-201116T0215Z/
Fairfield CT-
903 PM EST Sun Nov 15 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EST FOR CENTRAL
FAIRFIELD COUNTY...

At 902 PM EST, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Bethel, or near Danbury, moving northeast at 65 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.

These dangerous storms will be near...
  Monroe around 910 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4132 7347 4139 7352 4149 7336 4147 7332
      4147 7330 4145 7330 4145 7327 4143 7326
      4144 7325 4143 7324 4143 7322 4141 7319
      4139 7318 4138 7316 4138 7318 4135 7331
TIME...MOT...LOC 0202Z 245DEG 58KT 4141 7339 

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

$$

Goodman

682 
WWUS51 KOKX 160213
SVSOKX

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

CTC001-160222-
/O.EXP.KOKX.TO.W.0007.000000T0000Z-201116T0215Z/
Fairfield CT-
913 PM EST Sun Nov 15 2020

...THE TORNADO WARNING FOR CENTRAL FAIRFIELD COUNTY WILL EXPIRE AT
915 PM EST...
        
The storm which prompted the warning no longer appears capable of 
producing a tornado, and is moving out of the warned area. 
Therefore, the warning will be allowed to expire.

LAT...LON 4132 7347 4139 7352 4149 7336 4147 7332
      4147 7330 4145 7330 4145 7327 4143 7326
      4144 7325 4143 7324 4143 7322 4141 7319
      4139 7318 4138 7316 4138 7318 4135 7331
TIME...MOT...LOC 0212Z 246DEG 55KT 4143 7324 

$$

Goodman

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 15, 8:36 PM EST	Tornado Warning	OKX	Greater Bridgeport Planning Region	24 min
Nov 15, 8:41 PM EST	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	64 min
Nov 15, 9:41 PM EST	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	49 min
Nov 15, 10:30 PM EST	Severe Thunderstorm Warning	OKX	Southeastern Connecticut Planning Region	16 min
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, 8:48 PM EST	Special Marine Warning	OKX		57 min
Nov 15, 8:50 PM EST	Special Marine Warning	OKX		55 min
Nov 15, 9:29 PM EST	Tornado Warning	OKX	Suffolk	31 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 Tornado Warnings in Connecticut, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.