Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 255, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2020, 5:57 PM EDT for Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 18 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 25, 2020, 5:57 PM EDT (21:57 UTC)
- Expired
- Aug 25, 2020, 6:15 PM EDT
- In force
- 18 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 21:59 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 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, 10.0 hours before the alert went out and 188 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.
806
WUUS51 KPHI 252157
SVRPHI
NJC041-PAC089-095-252245-
/O.NEW.KPHI.SV.W.0255.200825T2157Z-200825T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
557 PM EDT Tue Aug 25 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Warren County in northwestern New Jersey...
Central Monroe County in northeastern Pennsylvania...
Northeastern Northampton County in eastern Pennsylvania...
* Until 645 PM EDT.
* At 557 PM EDT, a severe thunderstorm was located over Reeders, or
near Mount Pocono, moving southeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Mount Pocono, East Stroudsburg, Hackettstown, Washington,
Blairstown, Bangor, Pen Argyl, Wind Gap, Belvidere, Harmony,
Oxford, Hope, East Bangor, Brass Castle, Stormville,
Brodheadsville, Delaware Water Gap, Tannersville, Sun Valley and
Great Meadows-Vienna.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 296 and 314.
Interstate 80 in New Jersey between mile markers 0 and 22.
Interstate 380 in Pennsylvania between mile markers 0 and 1.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4092 7477 4079 7488 4078 7490 4077 7490
4072 7497 4067 7506 4098 7551 4099 7550
4101 7552 4113 7535
TIME...MOT...LOC 2157Z 298DEG 31KT 4103 7534
HAIL...<.75IN
WIND...60MPH
$$
NC1 follow-up statement
593
WWUS51 KPHI 252215
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
615 PM EDT Tue Aug 25 2020
NJC041-PAC089-095-252225-
/O.CAN.KPHI.SV.W.0255.000000T0000Z-200825T2245Z/
Warren NJ-Monroe PA-Northampton PA-
615 PM EDT Tue Aug 25 2020
...THE SEVERE THUNDERSTORM WARNING FOR WARREN...CENTRAL MONROE AND
NORTHEASTERN NORTHAMPTON COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern and northwestern New Jersey...and eastern and northeastern
Pennsylvania.
LAT...LON 4092 7477 4079 7488 4078 7490 4077 7490
4072 7497 4067 7506 4098 7551 4099 7550
4101 7552 4113 7535
TIME...MOT...LOC 2214Z 298DEG 31KT 4080 7452
$$
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, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 26 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, 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 Pennsylvania, 2020Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.