Alert archive / New York / Tornado Warnings in 2021

Tornado Warning 2, NWS New York, NY

July 12, 2021Orange County, Rockland County, New York; Bergen County, Passaic County, New Jersey

NWS New York, NY issued this tornado warning at Jul 12, 2021, 6:15 PM EDT for Orange County, Rockland County, New York; Bergen County, Passaic County, New Jersey. It was in force for 45 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: Jul 12, 2021, 6:15 PM EDT (22:15 UTC)
Expired: Jul 12, 2021, 7:00 PM EDT
In force: 45 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Bergen County, NJ, Passaic County, NJ, Orange County, NY, Rockland County, NY

The radar

The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 22:15 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 12, 3:34 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 127 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: 857 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 697 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

815 
WFUS51 KOKX 122215
TOROKX
NJC003-031-NYC071-087-122300-
/O.NEW.KOKX.TO.W.0002.210712T2215Z-210712T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
615 PM EDT Mon Jul 12 2021

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  Passaic County in northeastern New Jersey...
  Northwestern Bergen County in northeastern New Jersey...
  South central Orange County in southeastern New York...
  Rockland County in southeastern New York...

* Until 700 PM EDT.
    
* At 614 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Bloomingdale, or near West Milford, moving east at
  15 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.

* Locations impacted include...
  Wayne, West Milford, Monsey, Ramsey, Ringwood, Pompton Lakes,
  Suffern, Sloatsburg, Bloomingdale, Upper Greenwood Lake, Spring
  Valley, Wyckoff, Oakland, Wanaque and Franklin Lakes.

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.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4108 7449 4114 7444 4120 7437 4121 7438
      4121 7421 4110 7402 4090 7427 4091 7427
      4093 7429 4097 7428 4098 7430 4100 7430
      4101 7439 4103 7442 4102 7443 4104 7443
      4105 7445 4104 7450
TIME...MOT...LOC 2214Z 292DEG 13KT 4105 7436 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

JM

1 follow-up statement

030 
WWUS51 KOKX 122304
SVSOKX

Severe Weather Statement
National Weather Service New York NY
704 PM EDT Mon Jul 12 2021

NJC003-031-NYC071-087-122310-
/O.EXP.KOKX.TO.W.0002.000000T0000Z-210712T2300Z/
Passaic NJ-Bergen NJ-Orange NY-Rockland NY-
704 PM EDT Mon Jul 12 2021

...THE TORNADO WARNING FOR PASSAIC...NORTHWESTERN BERGEN...SOUTH
CENTRAL ORANGE AND ROCKLAND COUNTIES HAS EXPIRED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and 
a Severe Thunderstorm Warning remains in effect for the area. 

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northeastern New Jersey and parts of Southeast New York.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Passaic County, Northern Bergen County, Northwestern Essex County, 
Southern Orange County and Rockland County until 800 PM.


LAT...LON 4108 7449 4114 7444 4120 7437 4121 7438
      4121 7421 4110 7402 4090 7427 4091 7427
      4093 7429 4097 7428 4098 7430 4100 7430
      4101 7439 4103 7442 4102 7443 4104 7443
      4105 7445 4104 7450
TIME...MOT...LOC 2300Z 292DEG 13KT 4099 7416 

$$

JM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:18 AM EDT	Special Weather Statement	OKX	Bronx, Kings, Nassau, New York, Queens	42 min
Jul 12, 3:37 PM EDT	Special Marine Warning	OKX		38 min
Jul 12, 3:45 PM EDT	Special Weather Statement	OKX	Richmond	30 min
Jul 12, 3:53 PM EDT	Areal Flood Advisory	OKX	Richmond	49 min
Jul 12, 4:18 PM EDT	Areal Flood Advisory	OKX	Bronx, New York	52 min
Jul 12, 5:38 PM EDT	Areal Flood Advisory	OKX	Orange, Rockland	112 min
Jul 12, 5:41 PM EDT	Special Weather Statement	OKX	Rockland	49 min
Jul 12, 5:51 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	39 min
Jul 12, 6:09 PM EDT	Flash Flood Warning	OKX	Orange, Rockland	3 hr
Jul 12, 6:58 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	41 min
Jul 12, 7:46 PM EDT	Areal Flood Advisory	OKX	Orange	119 min
Jul 12, 4:55 PM EDT	Areal Flood Advisory	OKX	Bergen	32 min

Nearby

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