Alert archive / Pennsylvania / Tornado Warnings in 2023
Tornado Warning 27, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jul 16, 2023, 9:53 AM EDT for Montgomery County, Philadelphia County, Pennsylvania. It was in force for 37 min. 1 report 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
- Jul 16, 2023, 9:53 AM EDT (13:53 UTC)
- Expired
- Jul 16, 2023, 10:30 AM EDT
- In force
- 37 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 13:54 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 |
|---|---|---|---|
| Jul 16, 9:54 AM EDT | TSTM WND DMG | 1 Wnw Shawmont, PA | Picture of trees down along Spring Lane and Hagys Mill Road. Time estimated from radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 1.9 hours before the alert went out and 215 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
- 236 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 766 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 6.0
The text
As transmitted.
358
WFUS51 KPHI 161353
TORPHI
PAC091-101-161430-
/O.NEW.KPHI.TO.W.0027.230716T1353Z-230716T1430Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
953 AM EDT Sun Jul 16 2023
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Southeastern Montgomery County in southeastern Pennsylvania...
Northwestern Philadelphia County in southeastern Pennsylvania...
* Until 1030 AM EDT.
* At 953 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Narberth, or 7 miles west of Philadelphia, moving
northeast at 10 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...
Philadelphia, Conshohocken, Ambler, Jenkintown, Narberth,
Rockledge, Plymouth Meeting, Germantown, Bryn Mawr, Chestnut Hill,
Roxborough, West Conshohocken, Penn Wynne, Fort Washington,
Glenside, Flourtown, Ardmore, Oreland, Wyndmoor and Wyncote.
This includes the following highways...
Pennsylvania Turnpike between mile markers 334 and 340.
Interstate 76 in Pennsylvania between mile markers 331 and 339.
Interstate 476 in Pennsylvania between mile markers 15 and 17.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4006 7504 3998 7528 4005 7535 4018 7520
TIME...MOT...LOC 1353Z 234DEG 9KT 4004 7527
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
MJL2 follow-up statements
772
WWUS51 KPHI 161407
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1007 AM EDT Sun Jul 16 2023
PAC091-101-161430-
/O.CON.KPHI.TO.W.0027.000000T0000Z-230716T1430Z/
Montgomery PA-Philadelphia PA-
1007 AM EDT Sun Jul 16 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR
SOUTHEASTERN MONTGOMERY AND NORTHWESTERN PHILADELPHIA COUNTIES...
At 1007 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Chestnut Hill, or near Philadelphia, moving
northeast at 10 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Philadelphia, Jenkintown, Rockledge, Abington, Germantown, Chestnut
Hill, Fort Washington, Glenside, Flourtown, Oreland, Wyndmoor,
Wyncote and Maple Glen.
This includes the following highways...
Pennsylvania Turnpike between mile markers 337 and 341.
Interstate 76 in Pennsylvania between mile markers 334 and 338.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4007 7505 4002 7523 4006 7529 4018 7519
TIME...MOT...LOC 1407Z 234DEG 9KT 4006 7523
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
MJL419
WWUS51 KPHI 161421
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1021 AM EDT Sun Jul 16 2023
PAC091-101-161431-
/O.EXP.KPHI.TO.W.0027.000000T0000Z-230716T1430Z/
Montgomery PA-Philadelphia PA-
1021 AM EDT Sun Jul 16 2023
...THE TORNADO WARNING FOR SOUTHEASTERN MONTGOMERY AND NORTHWESTERN
PHILADELPHIA COUNTIES WILL EXPIRE AT 1030 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 heavy rain
is still possible with this thunderstorm.
LAT...LON 4007 7505 4002 7523 4006 7529 4018 7519
TIME...MOT...LOC 1421Z 234DEG 9KT 4008 7519
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:37 PM EDT | Areal Flood Advisory | PHI | Carbon | 19 min |
| Jul 15, 8:44 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 30 min |
| Jul 15, 8:56 PM EDT | Flash Flood Warning | PHI | Carbon | 95 min |
| Jul 16, 12:50 AM EDT | Special Weather Statement | PHI | Berks | 25 min |
| Jul 16, 1:41 AM EDT | Special Weather Statement | PHI | Carbon, Lehigh | 34 min |
| Jul 16, 2:12 AM EDT | Special Weather Statement | PHI | Carbon, Lehigh, Monroe | 33 min |
| Jul 16, 2:43 AM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Jul 16, 2:47 AM EDT | Special Weather Statement | PHI | Chester, Delaware | 28 min |
| Jul 16, 3:40 AM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 7 hr |
| Jul 16, 4:05 AM EDT | Flash Flood Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 6 hr |
| Jul 16, 4:14 AM EDT | Special Weather Statement | PHI | Bucks | 31 min |
| Jul 16, 4:38 AM EDT | Tornado Warning | PHI | Bucks | 37 min |
| Jul 16, 9:12 AM EDT | Flash Flood Warning | PHI | Chester | 2 hr |
| Jul 16, 9:40 AM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 16, 10:54 AM EDT | Areal Flood Warning | PHI | Monroe, Northampton | 5 hr |
| Jul 16, 11:08 AM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 3 hr |
| Jul 16, 12:22 PM EDT | Areal Flood Advisory | PHI | Bucks, Philadelphia | 3 hr |
| Jul 16, 12:26 PM EDT | Areal Flood Advisory | PHI | Philadelphia | 3 hr |
| Jul 16, 1:47 PM EDT | Areal Flood Advisory | PHI | Delaware, Philadelphia | 80 min |
| Jul 16, 6:44 PM EDT | Areal Flood Advisory | PHI | Bucks | 90 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.