Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 141, NWS Philadelphia/Mount Holly

July 28, 2022Berks County, Bucks County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2022, 5:38 PM EDT for Berks County, Bucks County, Montgomery County, Pennsylvania. It was in force for 52 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 28, 2022, 5:38 PM EDT (21:38 UTC)
Expired: Jul 28, 2022, 6:30 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Bucks County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 21:41 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 28, 5:45 PM EDT	TSTM WND DMG	Douglass Twp, PA	MULTIPLE REPORTS OF TREES DOWN IN DOUGLASS TOWNSHIP. 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.6 hours before the alert went out and 211 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: 135 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1125 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

258 
WUUS51 KPHI 282138
SVRPHI
PAC011-017-091-282230-
/O.NEW.KPHI.SV.W.0141.220728T2138Z-220728T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
538 PM EDT Thu Jul 28 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Berks County in eastern Pennsylvania...
  Northwestern Montgomery County in southeastern Pennsylvania...
  Western Bucks County in southeastern Pennsylvania...

* Until 630 PM EDT.

* At 537 PM EDT, a severe thunderstorm was located near Birdsboro, or
  9 miles east of Reading, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Pottstown, Birdsboro, Collegeville, Royersford, Trappe, East
  Greenville, Schwenksville, Bally, Bechtelsville, Green Lane, Spring
  Mount, Geryville, Gilbertsville, Skippack, Stowe, Boyertown,
  Pennsburg, Red Hill, Trumbauersville and Harleysville.

This includes Northeast Extension between mile markers 34 and 42.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4043 7582 4041 7534 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4024 7561
      4023 7560 4024 7565 4024 7570 4028 7585
TIME...MOT...LOC 2137Z 278DEG 24KT 4033 7575 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RCM

4 follow-up statements

108 
WWUS51 KPHI 282154
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
554 PM EDT Thu Jul 28 2022

PAC011-017-091-282230-
/O.CON.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Berks PA-Montgomery PA-Bucks PA-
554 PM EDT Thu Jul 28 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN BERKS...NORTHWESTERN MONTGOMERY AND WESTERN BUCKS
COUNTIES...

At 554 PM EDT, a severe thunderstorm was located over Gilbertsville,
or 17 miles east of Reading, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Pottstown, Collegeville, Royersford, Trappe, East Greenville,
Schwenksville, Bally, Bechtelsville, Green Lane, Spring Mount,
Gilbertsville, Skippack, Stowe, Boyertown, Pennsburg, Red Hill,
Trumbauersville, Harleysville, Pottsgrove and Evansburg.

This includes Northeast Extension between mile markers 34 and 41.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4042 7568 4041 7534 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4024 7561
      4023 7560 4024 7565 4025 7572 4026 7578
      4028 7577
TIME...MOT...LOC 2154Z 278DEG 24KT 4031 7560 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RCM

601 
WWUS51 KPHI 282206
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
606 PM EDT Thu Jul 28 2022

PAC011-282216-
/O.CAN.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Berks PA-
606 PM EDT Thu Jul 28 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4042 7556 4041 7534 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4023 7561
      4025 7569
TIME...MOT...LOC 2206Z 278DEG 24KT 4030 7549 

$$

PAC017-091-282230-
/O.CON.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Montgomery PA-Bucks PA-
606 PM EDT Thu Jul 28 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHWESTERN MONTGOMERY AND WESTERN BUCKS COUNTIES...

At 606 PM EDT, a severe thunderstorm was located over Spring Mount,
or 20 miles south of Allentown, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Pottstown, Collegeville, Royersford, Trappe, East Greenville,
Schwenksville, Green Lane, Geryville, Spring Mount, Gilbertsville,
Skippack, Stowe, Boyertown, Pennsburg, Red Hill, Trumbauersville,
Harleysville, Pottsgrove, Evansburg and Eagleville.

This includes Northeast Extension between mile markers 34 and 42.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4042 7556 4041 7534 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4023 7561
      4025 7569
TIME...MOT...LOC 2206Z 278DEG 24KT 4030 7549 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RCM

501 
WWUS51 KPHI 282216
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
616 PM EDT Thu Jul 28 2022

PAC017-282225-
/O.CAN.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Bucks PA-
616 PM EDT Thu Jul 28 2022

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BUCKS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4034 7554 4032 7536 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4023 7561
      4024 7562
TIME...MOT...LOC 2215Z 278DEG 24KT 4029 7540 

$$

PAC091-282230-
/O.CON.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Montgomery PA-
616 PM EDT Thu Jul 28 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR WEST CENTRAL MONTGOMERY COUNTY...

At 615 PM EDT, a severe thunderstorm was located near Spring Mount,
or 21 miles south of Allentown, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Pottstown, Collegeville, Royersford, Trappe, Schwenksville, Green
Lane, Spring Mount, Skippack, Harleysville, Evansburg, Eagleville,
Sanatoga, Trooper and Pottsgrove.

This includes Northeast Extension between mile markers 34 and 35.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4034 7554 4032 7536 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4023 7561
      4024 7562
TIME...MOT...LOC 2215Z 278DEG 24KT 4029 7540 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RCM

369 
WWUS51 KPHI 282226
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
626 PM EDT Thu Jul 28 2022

PAC091-282236-
/O.EXP.KPHI.SV.W.0141.000000T0000Z-220728T2230Z/
Montgomery PA-
626 PM EDT Thu Jul 28 2022

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MONTGOMERY COUNTY
WILL EXPIRE AT 630 PM EDT...
                
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4034 7554 4032 7536 4015 7540 4019 7555
      4021 7556 4020 7558 4024 7560 4023 7561
      4024 7562
TIME...MOT...LOC 2226Z 278DEG 24KT 4028 7533 

$$

RCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 3:31 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	29 min
Jul 28, 3:32 PM EDT	Special Weather Statement	PHI	Chester, Montgomery	28 min
Jul 28, 4:01 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	29 min
Jul 28, 4:02 PM EDT	Special Weather Statement	PHI	Chester, Delaware	28 min
Jul 28, 4:32 PM EDT	Special Weather Statement	PHI	Northampton	28 min
Jul 28, 4:32 PM EDT	Special Weather Statement	PHI	Berks	28 min
Jul 28, 4:34 PM EDT	Special Weather Statement	PHI	Lehigh	26 min
Jul 28, 5:01 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	29 min
Jul 28, 5:30 PM EDT	Special Weather Statement	PHI	Lehigh	30 min
Jul 28, 6:27 PM EDT	Special Weather Statement	PHI	Montgomery, Philadelphia	33 min
Jul 28, 6:29 PM EDT	Special Weather Statement	PHI	Chester	31 min
Jul 28, 7:07 PM EDT	Special Weather Statement	PHI	Philadelphia	23 min
Jul 28, 7:15 PM EDT	Special Weather Statement	PHI	Chester	30 min
Jul 28, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	46 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2022 Every severe thunderstorm warning in 2022

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.