Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 34, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 15, 2023, 4:49 PM EDT for Mercer County, Middlesex County, Somerset County, New Jersey. It was in force for 26 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
- Apr 15, 2023, 4:49 PM EDT (20:49 UTC)
- Expired
- Apr 15, 2023, 5:15 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 41 km from the middle of the area, began a volume at 20:48 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 |
|---|---|---|---|
| Apr 15, 4:49 PM EDT | HAIL 0.75 | Cranbury, NJ |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.8 hours before the alert went out and 152 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
- 26 J/kg
- Mixed-layer CIN
- -187 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
120
WUUS51 KPHI 152049
SVRPHI
NJC021-023-035-152115-
/O.NEW.KPHI.SV.W.0034.230415T2049Z-230415T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
449 PM EDT Sat Apr 15 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Mercer County in central New Jersey...
Southern Somerset County in northern New Jersey...
Southwestern Middlesex County in northern New Jersey...
* Until 515 PM EDT.
* At 449 PM EDT, a severe thunderstorm was located over Princeton
Meadows, or 12 miles southwest of New Brunswick, moving north at 10
mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible.
* Locations impacted include...
New Brunswick, Somerset, East Brunswick, South Brunswick, North
Brunswick, Princeton, Jamesburg, Hightstown, Cranbury, Rocky Hill,
Princeton Meadows, Windsor, Kingston, Dayton, Plainsboro Center,
Belle Mead, North Brunswick Township, Clearbrook Park, Edinburg and
Twin Rivers.
This includes New Jersey Turnpike between exits 8A and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 4027 7442 4025 7446 4025 7448 4024 7449
4024 7467 4048 7473 4049 7437
TIME...MOT...LOC 2049Z 174DEG 9KT 4032 7455
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
MLB1 follow-up statement
434
WWUS51 KPHI 152111
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
511 PM EDT Sat Apr 15 2023
NJC021-023-035-152120-
/O.EXP.KPHI.SV.W.0034.000000T0000Z-230415T2115Z/
Mercer NJ-Somerset NJ-Middlesex NJ-
511 PM EDT Sat Apr 15 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MERCER...SOUTHERN
SOMERSET AND SOUTHWESTERN MIDDLESEX COUNTIES WILL EXPIRE AT 515 PM
EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4027 7442 4025 7446 4025 7448 4024 7449
4024 7467 4048 7473 4049 7437
TIME...MOT...LOC 2110Z 174DEG 9KT 4037 7456
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 4:29 AM EDT | Marine Dense Fog Advisory | PHI | 54 hr | |
| Apr 15, 1:09 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Apr 15, 1:34 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 26 min |
| Apr 15, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 26 min |
| Apr 15, 1:55 PM EDT | Areal Flood Advisory | PHI | Sussex | 6 hr |
| Apr 15, 1:58 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 32 min |
| Apr 15, 2:06 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Somerset | 6 hr |
| Apr 15, 3:28 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 3 hr |
| Apr 15, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester | 31 min |
| Apr 15, 3:58 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 3 hr |
| Apr 15, 4:05 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer | 25 min |
| Apr 15, 4:19 PM EDT | Flash Flood Warning | PHI | Burlington, Camden | 3 hr |
| Apr 15, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 14 min |
| Apr 15, 6:05 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Somerset | 96 min |
| Apr 15, 6:32 PM EDT | Areal Flood Warning | PHI | Hunterdon | 5 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2023Every severe thunderstorm warning in 2023
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.