Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 190, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 2020, 12:10 AM EDT for 6 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 50 min. 2 reports 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
- Jul 31, 2020, 12:10 AM EDT (04:10 UTC)
- Expired
- Jul 31, 2020, 1:00 AM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 04:13 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 |
|---|---|---|---|
| Jul 31, 12:43 AM EDT | TSTM WND DMG | 2 Ssw North Brunswick, NJ | SEVERAL REPORTS OF WIRES DOWN NEAR ADAMS LANE IN NORTH BRUNSWICK. TIME ESTIMATED FROM RADAR. |
| Jul 31, 12:43 AM EDT | TSTM WND DMG | 2 Ssw North Brunswick, NJ | CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 SSW NORTH BRUNSWICK. SEVERAL REPORTS OF WIRES DOWN NEAR ADAMS LANE IN NORTH BRUNSWICK. TIME ESTIMATED FROM RADAR. |
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 00:00Z, 4.2 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
- 2515 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 895 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.9
The text
As transmitted.
538
WUUS51 KPHI 310410
SVRPHI
NJC005-021-023-025-029-035-PAC017-310500-
/O.NEW.KPHI.SV.W.0190.200731T0410Z-200731T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1210 AM EDT Fri Jul 31 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Mercer County in central New Jersey...
Northeastern Burlington County in southern New Jersey...
Southeastern Somerset County in northern New Jersey...
Southwestern Monmouth County in central New Jersey...
Southwestern Middlesex County in northern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 100 AM EDT.
* At 1209 AM EDT, a severe thunderstorm was located over Bordentown,
or 7 miles southeast of Trenton, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated. This storm has a history of producing
scattered tree and power line damage.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Trenton, New Brunswick, Somerset, Old Bridge, Howell, East
Brunswick, South Brunswick, North Brunswick, Manalapan, Ewing,
Princeton, Jamesburg, Hightstown, Bordentown, Cranbury, Yardley,
Tullytown, Allentown, Roosevelt and Wrightstown.
This includes the following highways...
New Jersey Turnpike between exits 7 and 9.
Interstate 195 in New Jersey between mile markers 0 and 25.
Interstate 295 in New Jersey between mile markers 53 and 71.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3993 7461 4021 7488 4043 7459 4049 7449
4023 7414
TIME...MOT...LOC 0409Z 234DEG 30KT 4013 7469
HAIL...<.75IN
WIND...60MPH
$$
JEO1 follow-up statement
577
WWUS51 KPHI 310454
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1254 AM EDT Fri Jul 31 2020
NJC005-021-023-025-029-035-PAC017-310504-
/O.EXP.KPHI.SV.W.0190.000000T0000Z-200731T0500Z/
Ocean NJ-Mercer NJ-Burlington NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-Bucks PA-
1254 AM EDT Fri Jul 31 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OCEAN...MERCER...
NORTHEASTERN BURLINGTON...SOUTHEASTERN SOMERSET...SOUTHWESTERN
MONMOUTH...SOUTHWESTERN MIDDLESEX AND SOUTHEASTERN BUCKS COUNTIES
WILL EXPIRE AT 100 AM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3993 7461 4021 7488 4043 7459 4049 7449
4023 7414
TIME...MOT...LOC 0454Z 234DEG 30KT 4046 7428
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 10:15 PM EDT | Special Marine Warning | PHI | 60 min | |
| Jul 30, 10:36 PM EDT | Special Weather Statement | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 39 min |
| Jul 30, 11:06 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 39 min |
| Jul 30, 11:35 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Mercer, Monmouth, Ocean | 40 min |
| Jul 30, 11:40 PM EDT | Special Weather Statement | PHI | Hunterdon | 50 min |
| Jul 30, 11:51 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset, Warren | 54 min |
| Jul 31, 12:21 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer | 4 hr |
| Jul 31, 12:33 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean and 1 more | 42 min |
| Jul 31, 12:54 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 4 hr |
| Jul 31, 1:10 AM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Morris, Somerset | 35 min |
| Jul 31, 1:29 AM EDT | Flash Flood Warning | PHI | Middlesex, Somerset | 4 hr |
| Jul 30, 10:11 PM EDT | Special Weather Statement | PHI | Chester, Delaware | 49 min |
| Jul 30, 10:35 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery | 40 min |
| Jul 30, 10:55 PM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 50 min |
| Jul 30, 11:27 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 33 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2020Severe Thunderstorm Warnings in Pennsylvania, 2020Every severe thunderstorm warning in 2020
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.