Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 265, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 27, 2020, 8:13 PM EDT for Hunterdon County, Somerset County, Warren County, New Jersey; Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 47 min. 12 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 27, 2020, 8:13 PM EDT (00:13 UTC)
- Expired
- Aug 27, 2020, 9:00 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 00:17 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 27, 8:20 PM EDT | TSTM WND DMG | 2 Ssw Glendon, PA | SEVERAL REPORTS OF DOWNED TREES AND POWER LINES IN VICINITY OF TUMBLE CREEK ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:22 PM EDT | TSTM WND DMG | 2 Ene Lower Saucon Twp, PA | DOWNED TREES AND WIRES NEAR GAFFNEY HILL ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:22 PM EDT | TSTM WND DMG | Riegelsville, PA | MULTIPLE LARGE TREES DOWN IN RIEGELSVILLE SOME BLOCKING ROADS. POWER OUTAGES REPORTED. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:27 PM EDT | TSTM WND DMG | 1 Wnw Riegelsville, PA | DOWNED TREES AND WIRES NEAR SUNNYSIDE ROAD ON THE NORTHAMPTON AND BUCKS COUNTY LINE. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:30 PM EDT | TSTM WND DMG | 1 Ene Fountain Hill, PA | SEVERAL REPORTS OF DOWNED TREES AND WIRES NEAR AND SOUTH AND EAST OF BETHLEHEM TWP. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:31 PM EDT | TSTM WND DMG | 3 Wnw Holland Twp, NJ | DOWNED TREES AND WIRES NEAR PINCHERS POINT ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:36 PM EDT | TSTM WND DMG | 1 Se Fountain Hill, PA | DOWNED TREES AND WIRES NEAR SOUTH MOUNTAIN PARK. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:40 PM EDT | TSTM WND DMG | 2 W Ferndale, PA | DOWNED TREES AND WIRES NEAR GALLOWS HILL ROAD. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:40 PM EDT | TSTM WND DMG | Betlehem, PA | SEVERAL TREES DOWN IN THE BETHLEHEM AREA. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:42 PM EDT | TSTM WND DMG | 2 Se Bethlehem Twp, PA | DOWNED TREES AND WIRES NEAR CHARDONNAY DRIVE. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:45 PM EDT | TSTM WND DMG | Williams Township, PA | PHOTOS OF NUMEROUS TREES DOWN THROUGHOUT WILLIAMS TOWNSHIP. SOME MINOR SHINGLE DAMAGE AS WELL. TIME ESTIMATED FROM RADAR. |
| Aug 27, 8:47 PM EDT | TSTM WND DMG | 2 W Ferndale, PA | DOWNED TREES AND WIRES NEAR STONY GARDEN ROAD. 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, 0.2 hours before the alert went out and 182 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
- 709 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 777 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -140 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.6
The text
As transmitted.
862
WUUS51 KPHI 280013
SVRPHI
NJC019-035-041-PAC017-077-095-280100-
/O.NEW.KPHI.SV.W.0265.200828T0013Z-200828T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
813 PM EDT Thu Aug 27 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
West central Somerset County in northern New Jersey...
East central Lehigh County in eastern Pennsylvania...
North central Bucks County in southeastern Pennsylvania...
Southeastern Northampton County in eastern Pennsylvania...
* Until 900 PM EDT.
* At 813 PM EDT, a severe thunderstorm was located over Old Orchard,
or near Easton, moving southeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Byram, Wilson, Hellertown,
Nazareth, Flemington, Tinicum, High Bridge, Clinton, Harmony, New
Hope, Alpha, Glen Gardner, Ferndale, Hampton, Frenchtown and
Lebanon.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 63 and 76.
Interstate 78 in New Jersey between mile markers 0 and 22.
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 4061 7468 4034 7491 4034 7494 4032 7492
4031 7493 4061 7549 4079 7521
TIME...MOT...LOC 0013Z 293DEG 40KT 4065 7529
HAIL...0.75IN
WIND...60MPH
$$
JEO2 follow-up statements
625
WWUS51 KPHI 280032
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
832 PM EDT Thu Aug 27 2020
NJC019-035-041-PAC017-077-095-280100-
/O.CON.KPHI.SV.W.0265.000000T0000Z-200828T0100Z/
Hunterdon NJ-Warren NJ-Somerset NJ-Lehigh PA-Bucks PA-Northampton PA-
832 PM EDT Thu Aug 27 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR HUNTERDON...SOUTHWESTERN WARREN...WEST CENTRAL SOMERSET...EAST
CENTRAL LEHIGH...NORTH CENTRAL BUCKS AND SOUTHEASTERN NORTHAMPTON
COUNTIES...
At 831 PM EDT, a severe thunderstorm was located over Milford, or 12
miles southeast of Easton, moving southeast at 45 mph. Another
cluster of severe thunderstorms is now entering the warned area near
and north of Allentown. A 57 mph wind gust was just reported at
Lehigh Valley International Airport.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Byram, Wilson, Hellertown,
Nazareth, Flemington, Tinicum, High Bridge, Clinton, Harmony, New
Hope, Alpha, Glen Gardner, Ferndale, Hampton, Frenchtown and Lebanon.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 63 and 76.
Interstate 78 in New Jersey between mile markers 0 and 22.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4061 7468 4034 7491 4034 7494 4032 7492
4031 7493 4061 7549 4079 7521
TIME...MOT...LOC 0031Z 293DEG 40KT 4057 7504
HAIL...0.75IN
WIND...60MPH
$$
JEO858
WWUS51 KPHI 280054
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
854 PM EDT Thu Aug 27 2020
NJC019-035-041-PAC017-077-095-280104-
/O.EXP.KPHI.SV.W.0265.000000T0000Z-200828T0100Z/
Hunterdon NJ-Warren NJ-Somerset NJ-Lehigh PA-Bucks PA-Northampton PA-
854 PM EDT Thu Aug 27 2020
...THE SEVERE THUNDERSTORM WARNING FOR HUNTERDON...SOUTHWESTERN
WARREN...WEST CENTRAL SOMERSET...EAST CENTRAL LEHIGH...NORTH CENTRAL
BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT 900 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. However gusty
winds are still possible with this thunderstorm.
LAT...LON 4061 7468 4034 7491 4034 7494 4032 7492
4031 7493 4061 7549 4079 7521
TIME...MOT...LOC 0054Z 293DEG 40KT 4040 7538
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:24 PM EDT | Special Weather Statement | PHI | Middlesex, Somerset | 51 min |
| Aug 27, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 46 min |
| Aug 27, 8:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 27, 9:13 PM EDT | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 47 min |
| Aug 27, 9:28 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth, Ocean, Somerset | 47 min |
| Aug 28, 3:05 PM EDT | Special Marine Warning | PHI | 85 min | |
| Aug 28, 3:41 PM EDT | Special Weather Statement | PHI | Salem | 34 min |
| Aug 28, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 53 min |
| Aug 28, 3:53 PM EDT | Special Marine Warning | PHI | 67 min | |
| Aug 28, 4:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Aug 28, 4:17 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 43 min |
| Aug 28, 4:29 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer | 61 min |
| Aug 28, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Cumberland, Gloucester, Salem | 66 min |
| Aug 28, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 56 min |
| Aug 28, 4:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 28, 5:13 PM EDT | Special Marine Warning | PHI | 92 min | |
| Aug 28, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 47 min |
| Aug 28, 5:37 PM EDT | Special Marine Warning | PHI | 83 min | |
| Aug 28, 5:51 PM EDT | Special Marine Warning | PHI | 84 min | |
| Aug 28, 6:53 PM EDT | Special Marine Warning | PHI | 64 min | |
| Aug 28, 7:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 27, 8:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 26 min |
| Aug 28, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 53 min |
| Aug 28, 3:33 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 101 min |
| Aug 28, 3:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 54 min |
| Aug 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 49 min |
| Aug 28, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 44 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.