Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 251, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 24, 2020, 6:14 PM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Northampton County, Pennsylvania. It was in force for 19 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 24, 2020, 6:14 PM EDT (22:14 UTC)
- Expired
- Aug 24, 2020, 6:33 PM EDT
- In force
- 19 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 22:14 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 12:00Z, 10.2 hours before the alert went out and 190 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
- 1431 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
The text
As transmitted.
069
WUUS51 KPHI 242214
SVRPHI
NJC019-041-PAC017-095-242300-
/O.NEW.KPHI.SV.W.0251.200824T2214Z-200824T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
614 PM EDT Mon Aug 24 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
North central Bucks County in southeastern Pennsylvania...
Southeastern Northampton County in eastern Pennsylvania...
* Until 700 PM EDT.
* At 614 PM EDT, a severe thunderstorm was located over Springtown,
or 7 miles south of Easton, moving southeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Easton, Bethlehem, Forks, Byram, Wilson, Hellertown, Flemington,
Tinicum, New Hope, Alpha, Ferndale, Frenchtown, West Easton,
Milford, Bloomsbury, Riegelsville, Stockton, Glendon, Pleasant
Valley and Revere.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 67 and 76.
Interstate 78 in New Jersey between mile markers 0 and 6.
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 4034 7492 4034 7494 4033 7492 4029 7495
4053 7534 4057 7537 4073 7525 4054 7478
TIME...MOT...LOC 2214Z 296DEG 26KT 4058 7525
HAIL...<.75IN
WIND...60MPH
$$
SFJ2 follow-up statements
392
WWUS51 KPHI 242227
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT Mon Aug 24 2020
NJC041-PAC095-242237-
/O.CAN.KPHI.SV.W.0251.000000T0000Z-200824T2300Z/
Warren NJ-Northampton PA-
627 PM EDT Mon Aug 24 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WARREN AND
SOUTHEASTERN NORTHAMPTON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4034 7492 4034 7494 4033 7492 4029 7495
4048 7526 4065 7510 4054 7478
TIME...MOT...LOC 2227Z 296DEG 26KT 4054 7514
$$
NJC019-PAC017-242300-
/O.CON.KPHI.SV.W.0251.000000T0000Z-200824T2300Z/
Hunterdon NJ-Bucks PA-
627 PM EDT Mon Aug 24 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHERN HUNTERDON AND NORTH CENTRAL BUCKS COUNTIES...
At 627 PM EDT, a severe thunderstorm was located over Revere, or 11
miles southeast of Easton, moving southeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Byram, Flemington, Tinicum, New Hope, Ferndale, Frenchtown, Milford,
Bloomsbury, Stockton, Revere, Ottsville, Sergeantsville, Pipersville,
Erwinna, Lumberville, Sand Brook and Lambertville.
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 4034 7492 4034 7494 4033 7492 4029 7495
4048 7526 4065 7510 4054 7478
TIME...MOT...LOC 2227Z 296DEG 26KT 4054 7514
HAIL...<.75IN
WIND...60MPH
$$
SFJ477
WWUS51 KPHI 242233
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
633 PM EDT Mon Aug 24 2020
NJC019-PAC017-242243-
/O.CAN.KPHI.SV.W.0251.000000T0000Z-200824T2300Z/
Hunterdon NJ-Bucks PA-
633 PM EDT Mon Aug 24 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HUNTERDON AND NORTH
CENTRAL BUCKS COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
LAT...LON 4034 7492 4034 7494 4033 7492 4029 7495
4048 7526 4065 7510 4054 7478
TIME...MOT...LOC 2232Z 296DEG 26KT 4052 7509
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 9:10 PM EDT | Special Marine Warning | PHI | 40 min | |
| Aug 23, 9:30 PM EDT | Special Weather Statement | PHI | Gloucester | 30 min |
| Aug 24, 3:34 PM EDT | Special Weather Statement | PHI | Somerset | 26 min |
| Aug 24, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 37 min |
| Aug 24, 5:57 PM EDT | Special Weather Statement | PHI | Middlesex | 33 min |
| Aug 24, 6:10 PM EDT | Special Weather Statement | PHI | Hunterdon | 35 min |
| Aug 24, 6:38 PM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 37 min |
| Aug 23, 8:20 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Aug 23, 8:42 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 48 min |
| Aug 24, 1:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 21 min |
| Aug 24, 1:48 PM EDT | Special Weather Statement | PHI | Northampton | 27 min |
| Aug 24, 2:20 PM EDT | Special Weather Statement | PHI | Northampton | 25 min |
| Aug 24, 4:05 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 2 hr |
| Aug 24, 4:08 PM EDT | Special Weather Statement | PHI | Monroe | 37 min |
| Aug 24, 5:01 PM EDT | Special Weather Statement | PHI | Carbon | 29 min |
| Aug 24, 5:11 PM EDT | Special Weather Statement | PHI | Northampton | 34 min |
| Aug 24, 5:40 PM EDT | Special Weather Statement | PHI | Northampton | 35 min |
| Aug 24, 6:05 PM EDT | Special Weather Statement | PHI | Berks | 25 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.