Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 310, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 7, 2023, 5:44 PM EDT for 5 counties in Pennsylvania. It was in force for 46 min. 4 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
- Sep 7, 2023, 5:44 PM EDT (21:44 UTC)
- Expired
- Sep 7, 2023, 6:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 21:46 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 |
|---|---|---|---|
| Sep 7, 5:44 PM EDT | HAIL 0.5 | Oley, PA | Picture and video of estimated half-inch hail. |
| Sep 7, 5:46 PM EDT | TSTM WND DMG | 2 S Beersville, PA | Downed tree limbs and power lines on Old Carriage Road. Time estimated from radar. |
| Sep 7, 6:13 PM EDT | HAIL 0.25 | 1 N Huffs Church, PA | Pea size hail report near Huffs Church. |
| Sep 7, 6:24 PM EDT | TSTM WND DMG | 1 Nnw Upper Milford Twp, PA | Downed trees on wires on MAIN RD, BRUNNER RD, VERA CRUZ RD, and ST PETERS RD. 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 |
|---|---|---|---|
| Sep 7, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.7 hours before the alert went out and 198 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
- 2091 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1114 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
957
WUUS51 KPHI 072144
SVRPHI
PAC011-029-077-091-095-072230-
/O.NEW.KPHI.SV.W.0310.230907T2144Z-230907T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
544 PM EDT Thu Sep 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Eastern Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Northwestern Chester County in southeastern Pennsylvania...
West central Northampton County in eastern Pennsylvania...
* Until 630 PM EDT.
* At 544 PM EDT, severe thunderstorms were located along a line
extending from near Schnecksville to 6 miles west of Bechtelsville
to near Honey Brook, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Allentown, Bethlehem, Pottstown, Coatesville, Emmaus, Northampton,
Downingtown, Birdsboro, Parkesburg, Bath, Topton, Honey Brook,
Elverson, Bally, Bechtelsville, Lyons, New Morgan, Neffs,
Coffeetown and Zionsville.
This includes the following highways...
Pennsylvania Turnpike between mile markers 298 and 311.
Northeast Extension between mile markers 49 and 67.
Interstate 78 in Pennsylvania between mile markers 46 and 60.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
&&
LAT...LON 4004 7593 4009 7594 4012 7593 4014 7588
4016 7590 4031 7582 4072 7568 4077 7536
4040 7552 4001 7571 3995 7599
TIME...MOT...LOC 2144Z 236DEG 17KT 4066 7565 4035 7576 4004 7593
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS1 follow-up statement
475
WWUS51 KPHI 072221
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
621 PM EDT Thu Sep 7 2023
PAC011-029-077-091-095-072231-
/O.EXP.KPHI.SV.W.0310.000000T0000Z-230907T2230Z/
Berks PA-Lehigh PA-Montgomery PA-Chester PA-Northampton PA-
621 PM EDT Thu Sep 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BERKS...LEHIGH...
NORTHWESTERN MONTGOMERY...NORTHWESTERN CHESTER AND WEST CENTRAL
NORTHAMPTON COUNTIES WILL EXPIRE AT 630 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
eastern and southeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4004 7593 4009 7594 4012 7593 4014 7588
4016 7590 4031 7582 4072 7568 4077 7536
4040 7552 4001 7571 3995 7599
TIME...MOT...LOC 2221Z 236DEG 17KT 4076 7546 4045 7557 4014 7574
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 1:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 33 min |
| Sep 7, 1:38 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 19 min |
| Sep 7, 2:10 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 50 min |
| Sep 7, 2:13 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 47 min |
| Sep 7, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 24 min |
| Sep 7, 4:35 PM EDT | Special Weather Statement | PHI | Berks | 25 min |
| Sep 7, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh | 43 min |
| Sep 7, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe | 43 min |
| Sep 7, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 31 min |
| Sep 7, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 41 min |
| Sep 7, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 42 min |
| Sep 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Monroe, Northampton | 34 min |
| Sep 7, 6:06 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 24 min |
| Sep 7, 6:18 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 42 min |
| Sep 7, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 24 min |
| Sep 7, 7:00 PM EDT | Special Weather Statement | PHI | Montgomery | 30 min |
| Sep 7, 7:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 39 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2023Every severe thunderstorm warning in 2023
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.