Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 268, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2023, 5:33 PM EDT for Berks County, Chester County, Pennsylvania. It was in force for 57 min. 8 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 7, 2023, 5:33 PM EDT (21:33 UTC)
- Expired
- Aug 7, 2023, 6:30 PM EDT
- In force
- 57 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Berks County, PA, Chester County, PA
The radar
The Philadelphia radar (KDIX), 118 km from the middle of the area, began a volume at 21:35 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 7, 5:57 PM EDT | TSTM WND DMG | Oxford, PA | Report of multiple large trees down in Oxford, PA on social media. Time estimated via radar. |
| Aug 7, 6:04 PM EDT | TSTM WND DMG | Cochranville, PA | Report on social media of trees down and power outages in Cochranville. Time estimated via radar. |
| Aug 7, 6:11 PM EDT | TSTM WND DMG | Kennett Square, PA | 911 Call Center received multiple reports of down trees in Kennet Square and New Garden Township. Time estimated from radar. |
| Aug 7, 6:12 PM EDT | HAIL 0.25 | Kemblesville, PA | Trained Spotter reports pea size hail 1 mile east of Kimblesville, PA at 6:12 PM. |
| Aug 7, 6:15 PM EDT | FUNNEL CLOUD | Coatesville, PA | EM reported funnel cloud near Coatesville. |
| Aug 7, 6:32 PM EDT | TSTM WND GST 68 | 1 Nnw Uwchlan Twp, PA | 68 MPH gust measured by trained spotter. Time given in report. |
| Aug 7, 6:32 PM EDT | TSTM WND GST 68 | 1 Nnw Uwchlan Twp, PA | 68 MPH gust measured by trained spotter. Time given in report. |
| Aug 7, 6:36 PM EDT | TSTM WND DMG | Spring Twp, PA | Tree Down into house. 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 |
|---|---|---|---|
| Aug 7, 3:13 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.6 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
- 285 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
854
WUUS51 KPHI 072133
SVRPHI
PAC011-029-072230-
/O.NEW.KPHI.SV.W.0268.230807T2133Z-230807T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
533 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
Chester County in southeastern Pennsylvania...
* Until 630 PM EDT.
* At 533 PM EDT, a severe thunderstorm was located near Sunnyburn, or
10 miles southeast of Red Lion, moving northeast at 55 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Reading, West Chester, Pottstown, Phoenixville, Coatesville,
Westtown, Wyomissing, Downingtown, Kennett Square, Birdsboro,
Oxford, Sinking Spring, Laureldale, Parkesburg, West Grove,
Wernersville, Honey Brook, Elverson, New Morgan and Glen Roy.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 324.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for northern
Delaware...and eastern and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
This is a DANGEROUS SITUATION. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!
A Tornado Watch remains in effect until 1100 PM EDT for northern
Delaware...and eastern and southeastern Pennsylvania.
&&
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4031 7613 4045 7583
4029 7566 4024 7569 4024 7560 4015 7553
4005 7539 3998 7544 3988 7559 3984 7559
3981 7570 3972 7577 3972 7613
TIME...MOT...LOC 2133Z 240DEG 49KT 3982 7643
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
RCM1 follow-up statement
247
WWUS51 KPHI 072159
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
559 PM EDT Mon Aug 7 2023
PAC011-029-072230-
/O.CON.KPHI.SV.W.0268.000000T0000Z-230807T2230Z/
Berks PA-Chester PA-
559 PM EDT Mon Aug 7 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN BERKS AND CHESTER COUNTIES...
At 558 PM EDT, severe thunderstorms were located along a line
extending from near East Petersburg to near Blake, moving northeast
at 55 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Reading, West Chester, Pottstown, Phoenixville, Coatesville,
Westtown, Wyomissing, Downingtown, Kennett Square, Birdsboro, Oxford,
Sinking Spring, Laureldale, Parkesburg, West Grove, Wernersville,
Honey Brook, Elverson, New Morgan and Glen Roy.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 324.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for northern
Delaware...and eastern and southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4031 7613 4045 7583
4029 7566 4024 7569 4024 7560 4015 7553
4005 7539 3998 7544 3988 7559 3984 7559
3981 7570 3972 7577 3972 7613
TIME...MOT...LOC 2158Z 239DEG 47KT 4013 7633 3975 7590
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 53 min |
| Aug 7, 5:57 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 79 min |
| Aug 7, 6:08 PM EDT | Tornado Warning | PHI | Chester | 19 min |
| Aug 7, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 69 min |
| Aug 7, 6:29 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 63 min |
| Aug 7, 6:35 PM EDT | Tornado Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 25 min |
| Aug 7, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 45 min |
| Aug 7, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more | 52 min |
| Aug 7, 7:00 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery, Northampton | 66 min |
| Aug 7, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 58 min |
| Aug 7, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 48 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.