Alert archive / Pennsylvania / Tornado Warnings in 2023
Tornado Warning 11, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jun 16, 2023, 11:33 AM EDT for Chester County, Delaware County, Montgomery County, Pennsylvania. It was in force for 27 min. 2 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, 11:33 AM EDT (15:33 UTC)
- Expired
- Jun 16, 2023, 12:00 PM EDT
- In force
- 27 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Chester County, PA, Delaware County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 95 km from the middle of the area, began a volume at 15:32 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, 11:47 AM EDT | HAIL 0.5 | 1 E Lenape, PA | Report from mPING: Half-inch (0.50 in.). |
| Jun 16, 11:47 AM EDT | HAIL 0.5 | 1 E Lenape, PA | Report from mPING: Half-inch (0.50 in.). |
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, 3.6 hours before the alert went out and 197 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
- 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
The text
As transmitted.
538
WFUS51 KPHI 161533
TORPHI
PAC029-045-091-161600-
/O.NEW.KPHI.TO.W.0011.230616T1533Z-230616T1600Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1133 AM EDT Fri Jun 16 2023
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
South central Montgomery County in southeastern Pennsylvania...
East central Chester County in southeastern Pennsylvania...
Northern Delaware County in southeastern Pennsylvania...
* Until noon EDT.
* At 1132 AM EDT, severe thunderstorms capable of producing both
tornadoes and extensive straight line wind damage were located over
West Chester, moving east at 40 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...
West Chester, Westtown, Gradyville, Cheyney, Broomall, Paoli,
Newtown Square, Bryn Mawr, Trout Lake, Radnor Township, King Of
Prussia, Lima, West Goshen, Malvern, Devon-Berwyn, Upper Providence
Township, Ardmore and Chesterbrook.
This includes the following highways...
Pennsylvania Turnpike between mile markers 328 and 329.
Interstate 76 in Pennsylvania between mile markers 327 and 330.
Interstate 476 in Pennsylvania between mile markers 7 and 15.
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 3988 7564 3999 7569 4010 7536 3997 7528
TIME...MOT...LOC 1532Z 250DEG 37KT 3995 7560
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
MLB2 follow-up statements
400
WWUS51 KPHI 161544
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1144 AM EDT Fri Jun 16 2023
PAC029-045-091-161600-
/O.CON.KPHI.TO.W.0011.000000T0000Z-230616T1600Z/
Montgomery PA-Chester PA-Delaware PA-
1144 AM EDT Fri Jun 16 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR SOUTH
CENTRAL MONTGOMERY...EAST CENTRAL CHESTER AND NORTHERN DELAWARE
COUNTIES...
At 1144 AM EDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Gradyville, or near West Chester, moving east at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Gradyville, Cheyney, Broomall, Paoli, Newtown Square, Trout Lake,
Radnor Township, King Of Prussia, Bryn Mawr, Lima, West Goshen,
Malvern, Devon-Berwyn, Upper Providence Township, Chesterbrook and
Ardmore.
This includes the following highways...
Pennsylvania Turnpike near mile marker 328.
Interstate 76 in Pennsylvania between mile markers 327 and 329.
Interstate 476 in Pennsylvania between mile markers 7 and 14.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3991 7552 4002 7559 4010 7537 3997 7528
TIME...MOT...LOC 1544Z 255DEG 33KT 3997 7549
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
MLB624
WWUS51 KPHI 161554
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1154 AM EDT Fri Jun 16 2023
PAC029-045-091-161603-
/O.EXP.KPHI.TO.W.0011.000000T0000Z-230616T1600Z/
Montgomery PA-Chester PA-Delaware PA-
1154 AM EDT Fri Jun 16 2023
...THE TORNADO WARNING FOR SOUTH CENTRAL MONTGOMERY...EAST CENTRAL
CHESTER AND NORTHERN DELAWARE COUNTIES WILL EXPIRE AT NOON 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
Montgomery, Chester, and Delaware counties until noon EDT.
LAT...LON 3991 7552 4002 7559 4010 7537 3997 7528
TIME...MOT...LOC 1553Z 250DEG 37KT 4000 7537
$$
MLBThe 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, 11:10 AM EDT | Tornado Warning | PHI | Berks, Chester | 35 min |
| Jun 16, 11:20 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 40 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, 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.