Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 48, NWS Philadelphia/Mount Holly

June 3, 2020Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 3, 2020, 11:29 AM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 46 min. 24 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 3, 2020, 11:29 AM EDT (15:29 UTC)
Expired: Jun 3, 2020, 12:15 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Chester County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 15:29 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 3, 11:30 AM EDT	TSTM WND DMG	1 Wnw North Heidelberg, PA	NUMEROUS REPORTS OF TREES AND WIRES DOWN IN NORTH HEIDELBERG. TIME ESTIMATED FROM RADAR.
Jun 3, 11:30 AM EDT	TSTM WND DMG	2 Wsw Bernville, PA	TREE DOWN ON WIRES ON CHRISTMAS VILLAGE ROAD.
Jun 3, 11:35 AM EDT	TSTM WND DMG	South Heidelberg Twp, PA	MULTIPLE TREES AND LIMBS SNAPPED OR DOWNED. TIME ESTIMATED FROM RADAR.
Jun 3, 11:35 AM EDT	TSTM WND DMG	Wernersville, PA	SEVERAL TREE LIMBS AND POWER LINES DOWN IN THE AREA. ESTIMATED WIND GUSTS UP TO 60 MPH.
Jun 3, 11:39 AM EDT	TSTM WND DMG	2 Sse South Heidelberg, PA	DOWNED TREE IN WIRES. TIME ESTIMATED.
Jun 3, 11:40 AM EDT	TSTM WND DMG	1 N Spring Twp, PA	TREE DOWN ONTO A HOUSE ON EAST COURT BOULEVARD. TIME ESTIMATED.
Jun 3, 11:40 AM EDT	TSTM WND DMG	2 N West Lawn, PA	SEVERAL REPORTS OF TREES AND WIRES DOWN IN SPRING RIDGE AND WEST LAWN.
Jun 3, 11:40 AM EDT	TSTM WND DMG	Spring Twp, PA	DOWNED TREE AND WIRES ON CLEVELAND AVENUE.
Jun 3, 11:40 AM EDT	TSTM WND DMG	Wyomissing, PA	LARGE TREE DOWNED IN WYOMISSING. REPORT VIA SOCIAL MEDIA WITH VIDEO. TIME ESTIMATED FROM RADAR.
Jun 3, 11:42 AM EDT	TSTM WND DMG	West Wyomissing, PA	SEVERAL REPORTS OF TREES AND POWER LINES DOWN.
Jun 3, 11:50 AM EDT	TSTM WND DMG	Douglassville, PA	LARGE TREE DOWN NEAR YELLOW HOUSE HOTEL. TIME ESTIMATED.
Jun 3, 11:50 AM EDT	TSTM WND DMG	Kenhorst, PA	SEVERAL REPORTS OF TREE AND POWER LINE DAMAGE.
Jun 3, 11:52 AM EDT	TSTM WND DMG	1 Nnw East Coventry Twp, PA	DOWNED TREE ON SCHOOLHOUSE ROAD. TIME ESTIMATED.
Jun 3, 11:53 AM EDT	TSTM WND DMG	1 Wnw Pughtown, PA	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 WNW PUGHTOWN. DOWNED TREE IN WIRES NEAR THE INTERSECTION OF STATE HIGHWAY 23 AND COVENTRYVILLE ROAD. TIME ESTIMATED.
Jun 3, 11:55 AM EDT	TSTM WND DMG	1 Ese Pughtown, PA	DOWNED TREE ON PUGHTOWN ROAD. TIME ESTIMATED.
Jun 3, 11:55 AM EDT	TSTM WND DMG	2 W Robeson Twp, PA	SEVERAL REPORTS OF TREES AND POWER LINES DOWN.
Jun 3, 11:56 AM EDT	TSTM WND GST 67	North Coventry Twp, PA
Jun 3, 11:59 AM EDT	TSTM WND DMG	Spring City, PA	MULTIPLE LARGE TREES SNAPPED; ONE FELL ONTO AND DESTROYED A SHED. REPORT VIA SOCIAL MEDIA WITH PHOTOS. TIME ESTIMATED FROM RADAR.
Jun 3, 11:59 AM EDT	TSTM WND GST 76	Pottstown, PA
Jun 3, 12:00 PM EDT	TSTM WND DMG	1 N Elverson, PA	TREES AND POWER LINES DOWN.
Jun 3, 12:00 PM EDT	TSTM WND DMG	East Coventry Twp, PA	DOWNED LIMBS AND POWER LINES.
Jun 3, 12:00 PM EDT	TSTM WND DMG	Spring City, PA	NUMEROUS TREES DOWN IN SPRING CITY. REPORT VIA SOCIAL MEDIA WITH PHOTOS. TIME ESTIMATED FROM RADAR.
Jun 3, 12:11 PM EDT	TSTM WND DMG	Spring City, PA	LARGE TREE DOWN ON WALL STREET.
Jun 3, 12:12 PM EDT	TSTM WND DMG	1 Ese West Vincent Twp, PA	TREE DOWN ON SAINT MATTHEWS ROAD.

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 3, 10:08 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.5 hours before the alert went out and 187 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

875 
WUUS51 KPHI 031529
SVRPHI
PAC011-029-091-031615-
/O.NEW.KPHI.SV.W.0048.200603T1529Z-200603T1615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1129 AM EDT Wed Jun 3 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Berks County in eastern Pennsylvania...
  West central Montgomery County in southeastern Pennsylvania...
  North central Chester County in southeastern Pennsylvania...

* Until 1215 PM EDT.

* At 1128 AM EDT, severe thunderstorms were located along a line
  extending from Bernville to Newmanstown to near Schaefferstown,
  moving southeast at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Reading, Pottstown, Coatesville, Wyomissing, Birdsboro,
  Collegeville, Royersford, Sinking Spring, Trappe, Womelsdorf,
  Wernersville, Robesonia, Honey Brook, Elverson, New Morgan, Spring
  Ridge, Pughtown, Glenmoore, Cedarville and Stowe.

This includes the following highways...
 Pennsylvania Turnpike near exit 298.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

&&

LAT...LON 4044 7620 4021 7543 3998 7582 4004 7593
      4011 7594 4014 7588 4031 7614 4036 7621
      4039 7627
TIME...MOT...LOC 1528Z 337DEG 43KT 4043 7609 4034 7622 4027 7634 

HAIL...0.75IN
WIND...60MPH
 
$$

JEO

1 follow-up statement

521 
WWUS51 KPHI 031554
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1154 AM EDT Wed Jun 3 2020

PAC011-029-091-031615-
/O.CON.KPHI.SV.W.0048.000000T0000Z-200603T1615Z/
Berks PA-Montgomery PA-Chester PA-
1154 AM EDT Wed Jun 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM EDT
FOR SOUTHEASTERN BERKS...WEST CENTRAL MONTGOMERY AND NORTH CENTRAL
CHESTER COUNTIES...

At 1153 AM EDT, severe thunderstorms were located along a line
extending from Cedarville to near Honey Brook to near Churchtown,
moving southeast at 60 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Reading, Pottstown, Coatesville, Wyomissing, Birdsboro, Collegeville,
Royersford, Sinking Spring, Trappe, Honey Brook, Elverson, New
Morgan, Spring Ridge, Pughtown, Glenmoore, Cedarville, Stowe,
Shillington, West Reading and Spring City.

This includes the following highways...
 Pennsylvania Turnpike between exits 298 and 312.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Berks County. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
&&

LAT...LON 4028 7610 4032 7604 4037 7597 4027 7562
      4019 7546 3998 7582 4004 7593 4011 7594
      4014 7588
TIME...MOT...LOC 1553Z 313DEG 52KT 4024 7567 4012 7587 4006 7598 

HAIL...0.75IN
WIND...70MPH
 
$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 12:24 AM EDT	Special Weather Statement	PHI	Monroe	51 min
Jun 3, 11:04 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more	41 min
Jun 3, 11:38 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	37 min
Jun 3, 11:59 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	46 min
Jun 3, 12:06 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Philadelphia	39 min
Jun 3, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks	44 min
Jun 3, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	64 min
Jun 3, 7:02 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	58 min
Jun 3, 7:11 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
Jun 3, 7:21 PM EDT	Tornado Warning	PHI	Delaware, Montgomery, Philadelphia	24 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2020 Every severe thunderstorm warning in 2020

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.