Alert archive / New Jersey / Tornado Warnings in 2021
Tornado Warning 35, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 19, 2021, 3:09 AM EDT for Mercer County, Middlesex County, Monmouth County, New Jersey. It was in force for 36 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, 3:09 AM EDT (07:09 UTC)
- Expired
- Aug 19, 2021, 3:45 AM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ
The radar
The Philadelphia radar (KDIX), 34 km from the middle of the area, began a volume at 07:12 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, 7.2 hours before the alert went out and 161 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.
960
WFUS51 KPHI 190709
TORPHI
NJC021-023-025-190745-
/O.NEW.KPHI.TO.W.0035.210819T0709Z-210819T0745Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
309 AM EDT Thu Aug 19 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Southeastern Mercer County in central New Jersey...
West central Monmouth County in central New Jersey...
Southwestern Middlesex County in northern New Jersey...
* Until 345 AM EDT.
* At 309 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Mercerville-Hamilton Square, or 7 miles east of
Trenton, moving northeast at 30 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.
* Locations impacted include...
Manalapan, Jamesburg, Hightstown, Cranbury, Allentown, Roosevelt,
Edinburg, Princeton Meadows, Windsor, Twin Rivers, Whittingham,
Mercerville-Hamilton Square, Clearbrook Park, Plainsboro Center,
Dayton, White Horse, Concordia, Yardville-Groveville, Rossmoor and
Princeton Junction.
This includes the following highways...
New Jersey Turnpike between exits 8 and 9.
Interstate 195 in New Jersey between mile markers 3 and 11.
Interstate 295 in New Jersey between mile markers 63 and 66.
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.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4015 7464 4016 7466 4025 7472 4040 7446
4022 7433
TIME...MOT...LOC 0709Z 237DEG 25KT 4022 7462
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Meola3 follow-up statements
183
WWUS51 KPHI 190726
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
326 AM EDT Thu Aug 19 2021
NJC025-190735-
/O.CAN.KPHI.TO.W.0035.000000T0000Z-210819T0745Z/
Monmouth NJ-
326 AM EDT Thu Aug 19 2021
...THE TORNADO WARNING FOR WEST CENTRAL MONMOUTH COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4028 7439 4027 7441 4025 7446 4025 7448
4023 7450 4022 7454 4030 7461 4040 7446
4030 7438
TIME...MOT...LOC 0725Z 237DEG 25KT 4028 7449
$$
NJC021-023-190745-
/O.CON.KPHI.TO.W.0035.000000T0000Z-210819T0745Z/
Mercer NJ-Middlesex NJ-
326 AM EDT Thu Aug 19 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 AM EDT FOR EAST
CENTRAL MERCER AND SOUTHWESTERN MIDDLESEX COUNTIES...
At 325 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Twin Rivers, or 14 miles south of New Brunswick,
moving northeast at 30 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.
Locations impacted include...
East Brunswick, Jamesburg, Hightstown, Cranbury, Twin Rivers,
Whittingham, Clearbrook Park, Princeton Meadows, Dayton, Concordia
and Rossmoor.
This includes New Jersey Turnpike between exits 8A and 9.
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.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4028 7439 4027 7441 4025 7446 4025 7448
4023 7450 4022 7454 4030 7461 4040 7446
4030 7438
TIME...MOT...LOC 0725Z 237DEG 25KT 4028 7449
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Meola925
WWUS51 KPHI 190733
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
333 AM EDT Thu Aug 19 2021
NJC021-190743-
/O.CAN.KPHI.TO.W.0035.000000T0000Z-210819T0745Z/
Mercer NJ-
333 AM EDT Thu Aug 19 2021
...THE TORNADO WARNING FOR EAST CENTRAL MERCER COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4027 7441 4025 7446 4025 7448 4028 7449
4029 7453 4029 7456 4031 7459 4040 7446
4030 7438
TIME...MOT...LOC 0733Z 237DEG 25KT 4031 7443
$$
NJC023-190745-
/O.CON.KPHI.TO.W.0035.000000T0000Z-210819T0745Z/
Middlesex NJ-
333 AM EDT Thu Aug 19 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 AM EDT FOR
SOUTHWESTERN MIDDLESEX COUNTY...
At 333 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Whittingham, or 12 miles south of New Brunswick,
moving northeast at 30 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.
Locations impacted include...
East Brunswick, Jamesburg, Cranbury, Whittingham, Clearbrook Park,
Princeton Meadows, Twin Rivers, Dayton, Concordia and Rossmoor.
This includes New Jersey Turnpike near exit 9.
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.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4027 7441 4025 7446 4025 7448 4028 7449
4029 7453 4029 7456 4031 7459 4040 7446
4030 7438
TIME...MOT...LOC 0733Z 237DEG 25KT 4031 7443
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Meola776
WWUS51 KPHI 190739
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
339 AM EDT Thu Aug 19 2021
NJC023-190749-
/O.EXP.KPHI.TO.W.0035.000000T0000Z-210819T0745Z/
Middlesex NJ-
339 AM EDT Thu Aug 19 2021
...THE TORNADO WARNING FOR SOUTHWESTERN MIDDLESEX COUNTY WILL EXPIRE
AT 345 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.
LAT...LON 4027 7441 4025 7446 4025 7448 4028 7449
4029 7453 4029 7456 4031 7459 4040 7446
4030 7438
TIME...MOT...LOC 0739Z 234DEG 15KT 4030 7446
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 11:19 PM EDT | Areal Flood Advisory | PHI | Warren | 3 hr |
| Aug 19, 12:48 AM EDT | Tornado Warning | PHI | Hunterdon | 27 min |
| Aug 19, 1:32 AM EDT | Small Craft Advisory | PHI | 5 hr | |
| Aug 19, 2:05 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Morris, Somerset | 3 hr |
| Aug 19, 2:13 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Mercer | 4 hr |
| Aug 19, 2:33 AM EDT | Tornado Warning | PHI | Morris | 27 min |
| Aug 19, 2:40 AM EDT | Tornado Warning | PHI | Morris | 24 min |
| Aug 19, 6:09 AM EDT | Areal Flood Warning | PHI | Mercer | 3 hr |
Nearby
Tornado 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.