Alert archive / Pennsylvania / Tornado Warnings in 2023

Tornado Warning 10, NWS Philadelphia/Mount Holly

June 16, 2023Berks County, Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Jun 16, 2023, 11:10 AM EDT for Berks County, Chester County, Pennsylvania. It was in force for 35 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: Jun 16, 2023, 11:10 AM EDT (15:10 UTC)
Expired: Jun 16, 2023, 11:45 AM EDT
In force: 35 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Berks County, PA, Chester County, PA

The radar

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 15:13 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
Jun 16, 11:10 AM EDT	TORNADO	3 Wnw West Caln Twp, PA	An EF-1 tornado began in West Caln Township near Baldwin Road where a hardwood tree was uprooted and found hanging on top of downed wires. South of here, between Baldwin Road and Chantry Lane, another hardwood tree was found snapped at its trunk. This was the
Jun 16, 11:22 AM EDT	TSTM WND DMG	West Brandywine Twp, PA	Severe trees with branches twisted off about 10 feet above the ground with numerous other trees down. Time estimated from radar.
Jun 16, 11:22 AM EDT	TSTM WND DMG	West Brandywine Twp, PA	Severe trees with branches twisted off about 10 feet above the ground with numerous other trees down. 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
Jun 16, 11:06 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.2 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 119 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

933 
WFUS51 KPHI 161510
TORPHI
PAC011-029-161545-
/O.NEW.KPHI.TO.W.0010.230616T1510Z-230616T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1110 AM EDT Fri Jun 16 2023

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  South central Berks County in eastern Pennsylvania...
  North central Chester County in southeastern Pennsylvania...

* Until 1145 AM EDT.

* At 1109 AM EDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Honey Brook, or 9 miles southeast of New Holland, moving northeast
  at 35 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Birdsboro, Honey Brook, Elverson, New Morgan, Glenmoore and
  Pughtown.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 298 and 308.
 Interstate 176 in Pennsylvania near mile marker 1.

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 4004 7593 4011 7594 4014 7588 4016 7591
      4027 7579 4016 7560 3999 7591 4002 7595
TIME...MOT...LOC 1509Z 226DEG 30KT 4004 7593 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

MLB

2 follow-up statements

617 
WWUS51 KPHI 161524
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1124 AM EDT Fri Jun 16 2023

PAC011-161533-
/O.CAN.KPHI.TO.W.0010.000000T0000Z-230616T1545Z/
Berks PA-
1124 AM EDT Fri Jun 16 2023

...THE TORNADO WARNING FOR SOUTH CENTRAL BERKS COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
southeastern Pennsylvania.

LAT...LON 4012 7588 4015 7584 4019 7577 4022 7571
      4020 7566 4016 7560 4003 7583 4005 7586
TIME...MOT...LOC 1523Z 237DEG 33KT 4008 7578 

$$

PAC029-161545-
/O.CON.KPHI.TO.W.0010.000000T0000Z-230616T1545Z/
Chester PA-
1124 AM EDT Fri Jun 16 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT FOR NORTH
CENTRAL CHESTER COUNTY...

At 1123 AM EDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Glenmoore, or 12 miles northwest of West Chester, moving northeast at
35 mph.

HAZARD...Tornado and quarter size hail.

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...
Elverson, Glenmoore and Pughtown. 

This includes Pennsylvania Turnpike between mile markers 301 and 308.
 
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 4012 7588 4015 7584 4019 7577 4022 7571
      4020 7566 4016 7560 4003 7583 4005 7586
TIME...MOT...LOC 1523Z 237DEG 33KT 4008 7578 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

MLB

352 
WWUS51 KPHI 161539
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1139 AM EDT Fri Jun 16 2023

PAC029-161548-
/O.EXP.KPHI.TO.W.0010.000000T0000Z-230616T1545Z/
Chester PA-
1139 AM EDT Fri Jun 16 2023

...THE TORNADO WARNING FOR NORTH CENTRAL CHESTER COUNTY WILL EXPIRE
AT 1145 AM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
southeastern Pennsylvania.

Remember, a Severe Thunderstorm Warning still remains in effect for
Chester County until noon EDT.

LAT...LON 4012 7588 4015 7584 4019 7577 4022 7571
      4020 7566 4016 7560 4003 7583 4005 7586
TIME...MOT...LOC 1538Z 226DEG 30KT 4017 7566 

$$

MLB

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 10:26 AM EDT	Special Weather Statement	PHI	Chester	34 min
Jun 16, 10:48 AM EDT	Severe Thunderstorm Warning	PHI	Chester	42 min
Jun 16, 11:02 AM EDT	Special Weather Statement	PHI	Delaware	28 min
Jun 16, 11:20 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	40 min
Jun 16, 11:33 AM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery	27 min
Jun 16, 11:46 AM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	59 min
Jun 16, 11:58 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	47 min
Jun 16, 12:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Jun 16, 12:46 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	3 hr
Jun 16, 12:49 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	3 hr

Nearby

Tornado Warnings in Pennsylvania, 2023 Every tornado warning in 2023 Tornadoes 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.