Alert archive / Pennsylvania / Tornado Warnings in 2023
Tornado Warning 30, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 7, 2023, 6:08 PM EDT for Chester County, Pennsylvania. It was in force for 19 min. 3 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, 6:08 PM EDT (22:08 UTC)
- Expired
- Aug 7, 2023, 6:27 PM EDT
- In force
- 19 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 113 km from the middle of the area, began a volume at 22:08 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, 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. |
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, 10.1 hours before the alert went out and 183 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.
346
WFUS51 KPHI 072208
TORPHI
PAC029-072245-
/O.NEW.KPHI.TO.W.0030.230807T2208Z-230807T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
608 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Central Chester County in southeastern Pennsylvania...
* Until 645 PM EDT.
* At 608 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Coatesville, or 12 miles west of West Chester,
moving northeast at 50 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
West Chester, Phoenixville, Coatesville, Downingtown, Paoli,
Chester Springs, Pughtown, Lionville, Marshallton,
Lionville-Marchwood, West Goshen, Malvern, South Coatesville,
Modena, Exton, Thorndale, Chesterbrook and Devon-Berwyn.
This includes Pennsylvania Turnpike between mile markers 308 and 323.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3986 7586 3989 7592 4021 7563 4004 7541
TIME...MOT...LOC 2208Z 227DEG 43KT 3992 7583
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
RCM2 follow-up statements
989
WWUS51 KPHI 072217
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
617 PM EDT Mon Aug 7 2023
PAC029-072245-
/O.CON.KPHI.TO.W.0030.000000T0000Z-230807T2245Z/
Chester PA-
617 PM EDT Mon Aug 7 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
NORTHEASTERN CHESTER COUNTY...
At 617 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Downingtown, or near West Chester, moving northeast
at 50 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Phoenixville, Coatesville, Downingtown, Pughtown, Lionville,
Lionville-Marchwood, Chester Springs, South Coatesville, Exton,
Thorndale and Chesterbrook.
This includes Pennsylvania Turnpike between mile markers 308 and 323.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3994 7576 3999 7583 4021 7563 4008 7546
TIME...MOT...LOC 2217Z 227DEG 43KT 4000 7572
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
RCM907
WWUS51 KPHI 072227
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT Mon Aug 7 2023
PAC029-072236-
/O.CAN.KPHI.TO.W.0030.000000T0000Z-230807T2245Z/
Chester PA-
627 PM EDT Mon Aug 7 2023
...THE TORNADO WARNING FOR NORTHEASTERN CHESTER COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM EDT for southeastern
Pennsylvania.
Remember, a Severe Thunderstorm Warning still remains in effect.
LAT...LON 3994 7576 3999 7583 4021 7563 4008 7546
TIME...MOT...LOC 2226Z 227DEG 43KT 4008 7561
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:33 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 57 min |
| 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, 6:21 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
Tornado Warnings in Pennsylvania, 2023Every tornado warning in 2023Tornadoes 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.