Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 34, NWS Philadelphia/Mount Holly

May 6, 2025Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 6, 2025, 1:08 PM EDT for Berks County, Pennsylvania. It was in force for 37 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: May 6, 2025, 1:08 PM EDT (17:08 UTC)
Expired: May 6, 2025, 1:45 PM EDT
In force: 37 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Berks County, PA

The radar

The State College radar (KCCX), 157 km from the middle of the area, began a volume at 17:07 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
May 6, 1:13 PM EDT	HAIL 1	Mount Aetna, PA	Quarter size hail falling at time of report.
May 6, 1:18 PM EDT	TSTM WND DMG	3 Nw Strausstown, PA	Broadcast media relays report of tree down on Route 183. 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
May 6, 1:06 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.1 hours before the alert went out and 199 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: 42 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

275 
WUUS51 KPHI 061708
SVRPHI
PAC011-061745-
/O.NEW.KPHI.SV.W.0034.250506T1708Z-250506T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
108 PM EDT Tue May 6 2025

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Berks County in eastern Pennsylvania...

* Until 145 PM EDT.

* At 108 PM EDT, a severe thunderstorm was located over Myerstown,
  moving northeast at 35 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...
  Strausstown and Womelsdorf.

This includes Interstate 78 in Pennsylvania between mile markers 10
and 24.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4052 7634 4052 7625 4056 7613 4056 7609
      4058 7606 4036 7620 4037 7623 4049 7643
TIME...MOT...LOC 1708Z 205DEG 30KT 4040 7629 

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

$$

Staarmann

3 follow-up statements

568 
WWUS51 KPHI 061716
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
116 PM EDT Tue May 6 2025

PAC011-061745-
/O.CON.KPHI.SV.W.0034.000000T0000Z-250506T1745Z/
Berks PA-
116 PM EDT Tue May 6 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR NORTHWESTERN BERKS COUNTY...

At 115 PM EDT, a severe thunderstorm was located near Strausstown, or
near Myerstown, moving northeast at 35 mph.

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

SOURCE...Broadcast media. At 113 PM EDT, quarter sized hail and 
         minor damage to trees was reported in Mount Aetna.

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

Locations impacted include...
Strausstown and Womelsdorf.

This includes Interstate 78 in Pennsylvania between mile markers 10
and 24.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 4052 7634 4052 7625 4056 7613 4056 7609
      4058 7606 4036 7620 4037 7623 4049 7643
TIME...MOT...LOC 1715Z 203DEG 30KT 4046 7629 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Staarmann

960 
WWUS51 KPHI 061725
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
125 PM EDT Tue May 6 2025

PAC011-061745-
/O.CON.KPHI.SV.W.0034.000000T0000Z-250506T1745Z/
Berks PA-
125 PM EDT Tue May 6 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR NORTHWESTERN BERKS COUNTY...

At 125 PM EDT, a severe thunderstorm was located near Strausstown, or
8 miles southwest of Schuylkill Haven, moving northeast at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. At 113 PM 
         EDT, quarter sized hail and minor damage to trees was 
         reported in Mount Aetna

SOURCE...Broadcast media.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Wind damage 
         to roofs, siding, trees, and power lines is possible.

Locations impacted include...
Strausstown.

This includes Interstate 78 in Pennsylvania between mile markers 12
and 23.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 4052 7634 4052 7625 4056 7613 4056 7609
      4058 7606 4043 7618 4044 7631 4051 7638
TIME...MOT...LOC 1725Z 205DEG 29KT 4052 7625 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.50 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Staarmann

642 
WWUS51 KPHI 061735
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
135 PM EDT Tue May 6 2025

PAC011-061745-
/O.EXP.KPHI.SV.W.0034.000000T0000Z-250506T1745Z/
Berks PA-
135 PM EDT Tue May 6 2025

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BERKS COUNTY WILL
EXPIRE AT 145 PM EDT...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern Pennsylvania.

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 4052 7634 4052 7625 4056 7613 4056 7609
      4058 7606 4043 7618 4044 7631 4051 7638
TIME...MOT...LOC 1735Z 205DEG 30KT 4059 7621 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 1:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester	44 min
May 6, 2:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	48 min
May 6, 2:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	59 min
May 6, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	49 min
May 6, 3:57 PM EDT	Tornado Warning	PHI	Monroe, Northampton	33 min
May 6, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	57 min
May 6, 4:19 PM EDT	Tornado Warning	PHI	Monroe	26 min
May 6, 4:31 PM EDT	Tornado Warning	PHI	Monroe	44 min
May 6, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	46 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2025 Every severe thunderstorm warning in 2025

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.