Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 252, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2020, 4:49 PM EDT for Sussex County, New Jersey. It was in force for 26 min. 5 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
- Aug 25, 2020, 4:49 PM EDT (20:49 UTC)
- Expired
- Aug 25, 2020, 5:15 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Sussex County, NJ
The radar
The Philadelphia radar (KDIX), 150 km from the middle of the area, began a volume at 20:52 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 |
|---|---|---|---|
| Aug 25, 4:55 PM EDT | TSTM WND GST 61 | High Point, NJ | HIGH POINT MONUMENT. |
| Aug 25, 4:59 PM EDT | TSTM WND DMG | Rockport, NJ | SEVERAL REPORTS OF DOWNED TREES AND WIRES NEAR MOUNT SALEM ROAD AND MOORE ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 25, 5:05 PM EDT | TSTM WND DMG | 2 Wnw Glenwood, NJ | SEVERAL REPORTS OF DOWNED TREES AND WIRES NEAR GLENWOOD MOUNT ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 25, 5:05 PM EDT | TSTM WND GST 56 | 3 Nw Vernon Valley, NJ | TIME ESTIMATED FROM RADAR. |
| Aug 25, 5:13 PM EDT | TSTM WND DMG | Vernon, NJ | DOWNED TREES AND WIRES NEAR POND EDDY ROAD IN VERNON. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.8 hours before the alert went out and 156 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
- 239 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1429 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
454
WUUS51 KPHI 252049
SVRPHI
NJC037-252115-
/O.NEW.KPHI.SV.W.0252.200825T2049Z-200825T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
449 PM EDT Tue Aug 25 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Sussex County in northwestern New Jersey...
* Until 515 PM EDT.
* At 448 PM EDT, a severe thunderstorm was located over Matamoras,
moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Hamburg, Sussex, Highland Lake, Vernon Valley and High Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4135 7468 4120 7437 4109 7450 4120 7464
4132 7478 4135 7475 4135 7471 4136 7469
TIME...MOT...LOC 2048Z 313DEG 40KT 4135 7469
HAIL...<.75IN
WIND...60MPH
$$
NC2 follow-up statements
427
WWUS51 KPHI 252106
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
506 PM EDT Tue Aug 25 2020
NJC037-252115-
/O.CON.KPHI.SV.W.0252.000000T0000Z-200825T2115Z/
Sussex NJ-
506 PM EDT Tue Aug 25 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN SUSSEX COUNTY...
At 505 PM EDT, a severe thunderstorm was located over Vernon Valley,
or 8 miles southwest of Warwick, moving southeast at 45 mph. This
storm produced a gust of 61 mph at High Point Monument at 455 PM.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Sussex, Highland Lake and Vernon Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4132 7462 4120 7437 4109 7450 4127 7466
4130 7466
TIME...MOT...LOC 2105Z 313DEG 40KT 4122 7451
HAIL...<.75IN
WIND...60MPH
$$
NC787
WWUS51 KPHI 252113
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
513 PM EDT Tue Aug 25 2020
NJC037-252122-
/O.EXP.KPHI.SV.W.0252.000000T0000Z-200825T2115Z/
Sussex NJ-
513 PM EDT Tue Aug 25 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SUSSEX COUNTY
WILL EXPIRE AT 515 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northwestern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4132 7462 4120 7437 4109 7450 4127 7466
4130 7466
TIME...MOT...LOC 2112Z 313DEG 40KT 4117 7444
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 4:43 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 25, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 40 min |
| Aug 25, 5:36 PM EDT | Special Marine Warning | PHI | 54 min | |
| Aug 25, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 18 min |
| Aug 25, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 50 min |
| Aug 25, 6:13 PM EDT | Special Weather Statement | PHI | Middlesex, Morris, Somerset | 47 min |
| Aug 25, 6:33 PM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 25, 6:56 PM EDT | Severe Thunderstorm Warning | PHI | Cape May, Cumberland | 43 min |
| Aug 25, 7:28 PM EDT | Special Marine Warning | PHI | 24 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.