Alert archive / New York / Tornado Warnings in 2021
Tornado Warning 7, NWS New York, NY
NWS New York, NY issued this tornado warning at Aug 19, 2021, 3:48 AM EDT for Orange County, Rockland County, Westchester County, New York; Bergen County, New Jersey. It was in force for 27 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
- Aug 19, 2021, 3:48 AM EDT (07:48 UTC)
- Expired
- Aug 19, 2021, 4:15 AM EDT
- In force
- 27 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Bergen County, NJ, Orange County, NY, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 105 km from the middle of the area, began a volume at 07:50 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
Brookhaven, NY (KOKX), launched 00:00Z, 7.8 hours before the alert went out and 105 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.
- Mixed-layer CAPE
- 491 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
013
WFUS51 KOKX 190748
TOROKX
NJC003-NYC071-087-119-190815-
/O.NEW.KOKX.TO.W.0007.210819T0748Z-210819T0815Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
348 AM EDT Thu Aug 19 2021
The National Weather Service in Upton NY has issued a
* Tornado Warning for...
North central Bergen County in northeastern New Jersey...
Northern Westchester County in southeastern New York...
Southeastern Orange County in southeastern New York...
Rockland County in southeastern New York...
* Until 415 AM EDT.
* At 347 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Monsey, moving northeast at 25 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...
Nanuet around 355 AM EDT.
Pomona around 400 AM EDT.
New City and Nyack around 405 AM EDT.
Haverstraw around 410 AM EDT.
Ossining and Peekskill around 415 AM 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, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4135 7396 4132 7398 4133 7388 4118 7371
4102 7406 4111 7422 4113 7421 4114 7423
4139 7395
TIME...MOT...LOC 0747Z 229DEG 21KT 4111 7410
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$3 follow-up statements
269
WWUS51 KOKX 190806
SVSOKX
Severe Weather Statement
National Weather Service New York NY
406 AM EDT Thu Aug 19 2021
NJC003-NYC071-087-119-190815-
/O.CON.KOKX.TO.W.0007.000000T0000Z-210819T0815Z/
Bergen NJ-Westchester NY-Orange NY-Rockland NY-
406 AM EDT Thu Aug 19 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 AM EDT FOR NORTH
CENTRAL BERGEN...NORTHERN WESTCHESTER...SOUTHEASTERN ORANGE AND
ROCKLAND COUNTIES...
At 405 AM EDT, a severe thunderstorm capable of producing a tornado
was located over New City, moving northeast at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Haverstraw and Stony Point around 410 AM EDT.
Peekskill around 425 AM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4135 7396 4132 7398 4133 7388 4118 7371
4102 7406 4111 7422 4113 7421 4114 7423
4139 7395
TIME...MOT...LOC 0805Z 229DEG 21KT 4118 7399
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
JC875
WWUS51 KOKX 190806 RRA
SVSOKX
Severe Weather Statement
National Weather Service New York NY
406 AM EDT Thu Aug 19 2021
NJC003-190816-
/O.CAN.KOKX.TO.W.0007.000000T0000Z-210819T0815Z/
Bergen NJ-
406 AM EDT Thu Aug 19 2021
...THE TORNADO WARNING FOR NORTH CENTRAL BERGEN 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 4135 7396 4132 7398 4133 7388 4121 7375
4108 7394 4105 7400 4114 7423 4139 7395
TIME...MOT...LOC 0806Z 224DEG 29KT 4121 7400
$$
NYC071-087-119-190815-
/O.CON.KOKX.TO.W.0007.000000T0000Z-210819T0815Z/
Westchester NY-Orange NY-Rockland NY-
406 AM EDT Thu Aug 19 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 AM EDT FOR NORTHERN
WESTCHESTER...SOUTHEASTERN ORANGE AND ROCKLAND COUNTIES...
At 406 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Pomona, or near Haverstraw, moving northeast at 35
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Ossining around 410 AM EDT.
Peekskill around 420 AM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4135 7396 4132 7398 4133 7388 4121 7375
4108 7394 4105 7400 4114 7423 4139 7395
TIME...MOT...LOC 0806Z 224DEG 29KT 4121 7400
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$831
WWUS51 KOKX 190814
SVSOKX
Severe Weather Statement
National Weather Service New York NY
414 AM EDT Thu Aug 19 2021
NJC003-NYC071-087-119-190824-
/O.EXP.KOKX.TO.W.0007.000000T0000Z-210819T0815Z/
Bergen NJ-Westchester NY-Orange NY-Rockland NY-
414 AM EDT Thu Aug 19 2021
...THE TORNADO WARNING FOR NORTH CENTRAL BERGEN...NORTHERN
WESTCHESTER...SOUTHEASTERN ORANGE AND ROCKLAND COUNTIES WILL EXPIRE
AT 415 AM EDT...
The tornadic thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.
LAT...LON 4135 7396 4132 7398 4133 7388 4118 7371
4102 7406 4111 7422 4113 7421 4114 7423
4139 7395
TIME...MOT...LOC 0814Z 229DEG 21KT 4121 7394
$$The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 3:21 AM EDT | Special Weather Statement | OKX | Rockland | 24 min |
| Aug 19, 3:30 AM EDT | Areal Flood Advisory | OKX | Rockland | 2 hr |
| Aug 19, 4:17 AM EDT | Tornado Warning | OKX | Rockland, Westchester | 28 min |
| Aug 19, 4:44 AM EDT | Tornado Warning | OKX | Putnam, Rockland, Westchester | 31 min |
| Aug 19, 3:00 PM EDT | Small Craft Advisory | OKX | 14 hr | |
| Aug 19, 2:43 AM EDT | Special Weather Statement | OKX | Passaic | 32 min |
| Aug 19, 2:53 AM EDT | Tornado Warning | OKX | Passaic | 23 min |
Nearby
Tornado Warnings in New York, 2021Tornado Warnings in New Jersey, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.