Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 321, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 7, 2023, 9:37 PM EDT for Berks County, Pennsylvania. 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
- Sep 7, 2023, 9:37 PM EDT (01:37 UTC)
- Expired
- Sep 7, 2023, 9:55 PM EDT
- In force
- 18 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 130 km from the middle of the area, began a volume at 01:38 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.6 hours before the alert went out and 203 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
- 661 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 1589 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
965
WUUS51 KPHI 080137
SVRPHI
PAC011-080215-
/O.NEW.KPHI.SV.W.0321.230908T0137Z-230908T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
937 PM EDT Thu Sep 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
* Until 1015 PM EDT.
* At 937 PM EDT, a severe thunderstorm was located near Wyomissing,
or near Reading, moving northeast at 15 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...
Reading, Wyomissing, Birdsboro, Sinking Spring, Laureldale, New
Morgan, Spring Ridge, Shillington, West Reading, Mount Penn,
Mohnton, Kenhorst, St. Lawrence, Wyomissing Hills, West Lawn,
Lorane, Reiffton, Amity Gardens, Whitfield and West Wyomissing.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 298.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
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 4049 7592 4030 7564 4029 7566 4015 7590
4028 7607
TIME...MOT...LOC 0137Z 222DEG 14KT 4028 7593
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS1 follow-up statement
178
WWUS51 KPHI 080155
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
955 PM EDT Thu Sep 7 2023
PAC011-080205-
/O.CAN.KPHI.SV.W.0321.000000T0000Z-230908T0215Z/
Berks PA-
955 PM EDT Thu Sep 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4049 7592 4030 7564 4029 7566 4015 7590
4028 7607
TIME...MOT...LOC 0154Z 222DEG 14KT 4033 7587
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 8:08 PM EDT | Special Weather Statement | PHI | Chester, Lehigh | 37 min |
| Sep 7, 8:42 PM EDT | Special Weather Statement | PHI | Bucks | 33 min |
| Sep 7, 9:19 PM EDT | Special Weather Statement | PHI | Berks | 26 min |
| Sep 7, 10:07 PM EDT | Special Weather Statement | PHI | Berks | 38 min |
| Sep 7, 10:38 PM EDT | Areal Flood Advisory | PHI | Berks | 76 min |
| Sep 7, 10:44 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 61 min |
| Sep 8, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 51 min |
| Sep 8, 5:12 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Sep 8, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 46 min |
| Sep 8, 5:16 PM EDT | Areal Flood Advisory | PHI | Chester, Montgomery | 3 hr |
| Sep 8, 5:21 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Sep 8, 5:29 PM EDT | Special Weather Statement | PHI | Montgomery | 31 min |
| Sep 8, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 41 min |
| Sep 8, 6:00 PM EDT | Special Weather Statement | PHI | Bucks | 30 min |
| Sep 8, 6:16 PM EDT | Special Weather Statement | PHI | Northampton | 29 min |
| Sep 8, 6:24 PM EDT | Special Weather Statement | PHI | Monroe | 36 min |
| Sep 8, 6:29 PM EDT | Special Weather Statement | PHI | Bucks | 31 min |
| Sep 8, 6:34 PM EDT | Areal Flood Advisory | PHI | Monroe | 3 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.