Alert archive / New Jersey / Tornado Warnings in 2021
Tornado Warning 51, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Sep 1, 2021, 7:28 PM EDT for 4 counties in New Jersey. It was in force for 47 min. 1 report 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
- Sep 1, 2021, 7:28 PM EDT (23:28 UTC)
- Expired
- Sep 1, 2021, 8:15 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 23:29 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 |
|---|---|---|---|
| Sep 1, 7:32 PM EDT | TORNADO | 2 W West Windsor Twp., NJ | A TORNADO TOUCHED DOWN ALONG EMMONS DRIVE ALONG ROUTE 1 IN PRINCETON, NJ AS A REMNANT SUPERCELL MOVED NORTHWARD AFTER PRODUCING THE MULLICA HILL AND BURLINGTON, NJ TORNADOES EARLIER WEDNESDAY AFTERNOON AS IDA`S REMNANTS MOVED THROUGH THE REGION. DAMAGE FIRST O |
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 |
|---|---|---|---|
| Sep 1, 12:40 PM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.5 hours before the alert went out and 139 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
- 51 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1274 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
613
WFUS51 KPHI 012328
TORPHI
NJC021-023-027-035-020015-
/O.NEW.KPHI.TO.W.0051.210901T2328Z-210902T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
728 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Southern Morris County in northern New Jersey...
Central Mercer County in central New Jersey...
Central Somerset County in northern New Jersey...
Northern Middlesex County in northern New Jersey...
* Until 815 PM EDT.
* At 728 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Lawrenceville, or near Trenton, moving northeast
at 40 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...
Trenton, New Brunswick, Somerville, Somerset, Edison, East
Brunswick, South Brunswick, North Brunswick, Ewing, Carteret,
Middlesex, Princeton, Bound Brook, Manville, Rocky Hill, Millstone,
Princeton Meadows, Colonia, Kingston and Dayton.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 35 and 42.
Interstate 295 in New Jersey between mile markers 63 and 71.
Interstate 287 in New Jersey between mile markers 0 and 16.
Garden State Parkway between mile markers 128 and 134.
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!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4021 7470 4025 7479 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2328Z 213DEG 36KT 4030 7469
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann5 follow-up statements
391
WWUS51 KPHI 012336
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
736 PM EDT Wed Sep 1 2021
NJC021-023-027-035-020015-
/O.CON.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Morris NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
736 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR SOUTHERN
MORRIS...NORTHEASTERN MERCER...CENTRAL SOMERSET AND NORTHERN
MIDDLESEX COUNTIES...
At 735 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Princeton, or 10 miles northeast of Trenton, moving
northeast at 40 mph. This storm has a history of producing tornadoes
across southern New Jersey.
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...
New Brunswick, Somerville, Somerset, Edison, East Brunswick, South
Brunswick, North Brunswick, Carteret, Middlesex, Princeton, Bound
Brook, Manville, Rocky Hill, Millstone, Princeton Meadows, Colonia,
Kingston, Dayton, Plainsboro Center and Belle Mead.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 35 and 42.
Interstate 295 in New Jersey between mile markers 68 and 70.
Interstate 287 in New Jersey between mile markers 0 and 16.
Garden State Parkway between mile markers 128 and 134.
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!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4027 7464 4029 7477 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2335Z 211DEG 34KT 4035 7466
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann496
WWUS51 KPHI 012340
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
740 PM EDT Wed Sep 1 2021
NJC021-023-027-035-020015-
/O.CON.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Morris NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
740 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR SOUTHERN
MORRIS...NORTH CENTRAL MERCER...CENTRAL SOMERSET AND NORTHERN
MIDDLESEX COUNTIES...
At 739 PM EDT, a confirmed tornado was located over Rocky Hill, or
12 miles southwest of New Brunswick, moving northeast at 40 mph.
This strong has a history of producing strong tornadoes across
southern New Jersey.
HAZARD...Damaging tornado.
SOURCE...Radar confirmed tornado.
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...
New Brunswick, Somerville, Somerset, Edison, East Brunswick, South
Brunswick, North Brunswick, Carteret, Middlesex, Princeton, Bound
Brook, Manville, Rocky Hill, Millstone, Colonia, Kingston, Dayton,
Plainsboro Center, Belle Mead and Martinsville.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 35 and 42.
Interstate 287 in New Jersey between mile markers 0 and 16.
Garden State Parkway between mile markers 129 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado has been confirmed. 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!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4031 7461 4034 7474 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2339Z 211DEG 34KT 4038 7463
TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN
$$
Staarmann285
WWUS51 KPHI 012352
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
752 PM EDT Wed Sep 1 2021
NJC021-020002-
/O.CAN.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Mercer NJ-
752 PM EDT Wed Sep 1 2021
...THE TORNADO WARNING FOR NORTH CENTRAL MERCER COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been
cancelled.
A Tornado Watch remains in effect until 1000 PM EDT for northern New
Jersey.
LAT...LON 4037 7454 4040 7468 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2352Z 213DEG 36KT 4050 7453
$$
NJC023-027-035-020015-
/O.CON.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Morris NJ-Somerset NJ-Middlesex NJ-
752 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR SOUTHERN
MORRIS...CENTRAL SOMERSET AND NORTHERN MIDDLESEX COUNTIES...
At 752 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Somerset, or near New Brunswick, moving northeast at
40 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...
New Brunswick, Somerville, Somerset, Edison, East Brunswick, South
Brunswick, North Brunswick, Carteret, Middlesex, Bound Brook,
Manville, Rocky Hill, Millstone, Colonia, Martinsville, Millington,
North Brunswick Township, Kendall Park, Society Hill and Dayton.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 35 and 42.
Interstate 287 in New Jersey between mile markers 0 and 16.
Garden State Parkway between mile markers 129 and 134.
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!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4037 7454 4040 7468 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2352Z 213DEG 36KT 4050 7453
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann364
WWUS51 KPHI 012359
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
759 PM EDT Wed Sep 1 2021
NJC023-027-035-020015-
/O.CON.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Morris NJ-Somerset NJ-Middlesex NJ-
759 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR SOUTHERN
MORRIS...EASTERN SOMERSET AND NORTHEASTERN MIDDLESEX COUNTIES...
At 759 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Society Hill, or near New Brunswick, moving
northeast at 40 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...
New Brunswick, Somerset, Edison, East Brunswick, North Brunswick,
Carteret, Middlesex, Bound Brook, Manville, Millstone, Colonia,
Martinsville, Millington, North Brunswick Township, Society Hill,
Woodbridge, South Plainfield, North Plainfield, Highland Park and
Metuchen.
This includes the following highways...
New Jersey Turnpike between exits 10 and 13.
Interstate 78 in New Jersey between mile markers 36 and 42.
Interstate 287 in New Jersey between mile markers 0 and 14.
Garden State Parkway between mile markers 129 and 134.
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!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4043 7447 4047 7460 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 2359Z 213DEG 34KT 4053 7450
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann795
WWUS51 KPHI 020005
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
805 PM EDT Wed Sep 1 2021
NJC023-027-035-020015-
/O.EXP.KPHI.TO.W.0051.000000T0000Z-210902T0015Z/
Morris NJ-Somerset NJ-Middlesex NJ-
805 PM EDT Wed Sep 1 2021
...THE TORNADO WARNING FOR SOUTHERN MORRIS...EASTERN SOMERSET AND
NORTHEASTERN MIDDLESEX COUNTIES WILL EXPIRE AT 815 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and is exiting the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM EDT for northern New
Jersey.
LAT...LON 4043 7447 4047 7460 4072 7454 4069 7445
4067 7446 4066 7445 4066 7440 4063 7442
4060 7446 4061 7431 4059 7429 4060 7426
4059 7420
TIME...MOT...LOC 0005Z 213DEG 36KT 4057 7447
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 3:23 AM EDT | Gale Warning | PHI | 32 hr | |
| Sep 1, 3:23 AM EDT | Small Craft Advisory | PHI | 41 hr | |
| Sep 1, 4:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 39 hr |
| Sep 1, 7:58 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 47 min |
| Sep 1, 8:39 AM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 39 min |
| Sep 1, 9:11 AM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 1, 11:24 AM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 3 hr |
| Sep 1, 4:04 PM EDT | Areal Flood Warning | PHI | Warren | 24 hr |
| Sep 1, 4:12 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 7 hr |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Morris, Somerset | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 8 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Passaic | 21 days |
| Sep 1, 4:33 PM EDT | River Flood Warning | PHI | Morris, Passaic | 46 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 36 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Somerset | 22 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 42 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 48 hr |
| Sep 1, 4:41 PM EDT | River Flood Warning | PHI | Somerset | 61 hr |
| Sep 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 47 min |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Sep 1, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| Sep 1, 5:34 PM EDT | Tornado Warning | PHI | Mercer | 26 min |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Cumberland, Salem | 25 min |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 10 hr |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 33 min |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 33 min |
| Sep 1, 6:05 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 10 hr |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Sep 1, 6:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 6:20 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 40 min |
| Sep 1, 6:22 PM EDT | Tornado Warning | PHI | Burlington, Camden, Gloucester | 23 min |
| Sep 1, 6:42 PM EDT | Tornado Warning | PHI | Burlington, Camden | 33 min |
| Sep 1, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Sep 1, 7:04 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 26 min |
| Sep 1, 7:22 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer | 11 min |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Sep 1, 7:44 PM EDT | Special Marine Warning | PHI | 61 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.