Severe Thunderstorm Warning 290, NWS Philadelphia/Mount Holly

Issued

Aug 12, 2023, 6:47 PM EDT (22:47 UTC)

Expired

Aug 12, 2023, 7:15 PM EDT

In force

28 min

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Hail

1.0 in

Wind

60.0 mph

Counties Chester County, PA, Delaware County, PA, Montgomery County, PA

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 22:49 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

841 
WUUS51 KPHI 122247
SVRPHI
PAC029-045-091-122330-
/O.NEW.KPHI.SV.W.0290.230812T2247Z-230812T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
647 PM EDT Sat Aug 12 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Montgomery County in southeastern Pennsylvania...
  Northeastern Chester County in southeastern Pennsylvania...
  Northeastern Delaware County in southeastern Pennsylvania...

* Until 730 PM EDT.

* At 647 PM EDT, a severe thunderstorm was located near Lionville, or
  9 miles northwest of West Chester, moving east at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Norristown, Phoenixville, West Norriton, East Norriton,
  Downingtown, Collegeville, Royersford, Trappe, Pughtown, Bryn Mawr,
  Trout Lake, Radnor Township, Lionville-Marchwood, Valley Forge,
  Glenmoore, Paoli, Chester Springs, Newtown Square, Lionville and
  King Of Prussia.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 303 and 331.
 Interstate 76 in Pennsylvania between mile markers 327 and 331.
 Interstate 476 in Pennsylvania between mile markers 9 and 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3997 7577 4016 7581 4025 7535 3998 7530
TIME...MOT...LOC 2247Z 262DEG 15KT 4008 7570 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

709 
WWUS51 KPHI 122310
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
710 PM EDT Sat Aug 12 2023

PAC029-045-091-122330-
/O.CON.KPHI.SV.W.0290.000000T0000Z-230812T2330Z/
Montgomery PA-Chester PA-Delaware PA-
710 PM EDT Sat Aug 12 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN MONTGOMERY...NORTHEASTERN CHESTER AND NORTH CENTRAL
DELAWARE COUNTIES...

At 710 PM EDT, a severe thunderstorm was located over Chester
Springs, or 10 miles north of West Chester, moving east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Phoenixville, West Norriton, Collegeville, Royersford, Trappe, Valley
Forge, Paoli, Chester Springs, Pughtown, Lionville, Trout Lake,
Radnor Township, King Of Prussia, Lionville-Marchwood, Skippack,
Spring City, Malvern, Exton, Evansburg and Audubon.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 311 and 329.
 Interstate 76 in Pennsylvania between mile markers 327 and 329.
 Interstate 476 in Pennsylvania between mile markers 11 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4000 7567 4018 7571 4024 7539 4000 7534
TIME...MOT...LOC 2310Z 260DEG 15KT 4011 7561 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich

667 
WWUS51 KPHI 122315
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
715 PM EDT Sat Aug 12 2023

PAC029-045-091-122325-
/O.CAN.KPHI.SV.W.0290.000000T0000Z-230812T2330Z/
Montgomery PA-Chester PA-Delaware PA-
715 PM EDT Sat Aug 12 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MONTGOMERY...
NORTHEASTERN CHESTER AND NORTH CENTRAL DELAWARE COUNTIES IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4000 7567 4018 7571 4024 7539 4000 7534
TIME...MOT...LOC 2314Z 262DEG 15KT 4011 7558 

$$

Hoeflich

Severe Thunderstorm Warnings in Pennsylvania, 2023Every severe thunderstorm warning in 2023

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.