Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 33, NWS Philadelphia/Mount Holly

May 19, 2019Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 19, 2019, 7:57 PM EDT for Berks County, Pennsylvania. It was in force for 48 min. 7 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 19, 2019, 7:57 PM EDT (23:57 UTC)
Expired: May 19, 2019, 8:45 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Berks County, PA

What was reported inside it

Time	Report	Where	Remark
May 19, 8:10 PM EDT	TSTM WND DMG	1 N Heidelberg Twp, PA	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 N HEIDELBERG TWP. MULTIPLE TREES AND POWER POLES DOWN. TIME ESTIMATED FROM RADAR. CORRECTED TIME.
May 19, 8:10 PM EDT	TSTM WND DMG	1 N Heidelberg Twp, PA	MULTIPLE TREES AND POWER POLES DOWN. TIME ESTIMATED FROM RADAR.
May 19, 8:13 PM EDT	TSTM WND DMG	2 Ene South Heidelberg, PA	TREE DOWN ON A RESIDENCE ON MILLER ROAD.
May 19, 8:20 PM EDT	TSTM WND DMG	Bern Twp, PA	TREE AND OTHER DEBRIS DOWN ON ROUTE 222 AT TULPEHOCKEN BRIDGE. TIME ESTIMATED FROM RADAR.
May 19, 8:26 PM EDT	HAIL 1	Wyomissing, PA	DIME TO QUARTER SIZE HAIL IN THE WYOMISSING AREA.
May 19, 8:31 PM EDT	TSTM WND DMG	1 N Exeter Twp, PA	LARGE TREE DOWN ACROSS OLEY TURNPIKE ROAD BETWEEN WOODS LANE AND RITTERS LANE. ROAD IS COMPLETELY BLOCKED AND LOVE POWER LINES ARE DOWN.
May 19, 8:51 PM EDT	TSTM WND GST 60	Laureldale, PA	TRAINED SPOTTER ESTIMATED 60 TO 65 MPH WIND GUSTS WITH VERY HEAVY RAINFALL AND NO HAIL.

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 19, 2:36 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 12.0 hours before the alert went out and 197 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: 107 J/kg
Mixed-layer CIN: -262 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

241 
WUUS51 KPHI 192357
SVRPHI
PAC011-200045-
/O.NEW.KPHI.SV.W.0033.190519T2357Z-190520T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
757 PM EDT Sun May 19 2019

The National Weather Service in Mount Holly NJ has issued a

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

* Until 845 PM EDT.

* At 756 PM EDT, a severe thunderstorm was located near Denver, or
  near Ephrata, moving northeast at 30 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...
  Reading, Wyomissing, Birdsboro, Hamburg, Fleetwood, Sinking Spring,
  Laureldale, Womelsdorf, Wernersville, Newmanstown, Leesport,
  Adamstown, Shoemakersville, Bernville, Spring Ridge, Fairview Hgts,
  Shillington, West Reading, Mount Penn and Mohnton.

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 4056 7596 4030 7564 4019 7596 4032 7617
      4036 7621 4036 7622 4042 7631
TIME...MOT...LOC 2356Z 243DEG 24KT 4028 7618 

HAIL...1.00IN
WIND...60MPH
 
$$

Robertson

1 follow-up statement

158 
WWUS51 KPHI 200019
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
819 PM EDT Sun May 19 2019

PAC011-200045-
/O.CON.KPHI.SV.W.0033.000000T0000Z-190520T0045Z/
Berks PA-
819 PM EDT Sun May 19 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR CENTRAL BERKS COUNTY...

At 819 PM EDT, severe thunderstorms were located along a line
extending from near Myerstown to Sinking Spring to near Reading,
moving northeast at 25 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...
Reading, Wyomissing, Birdsboro, Hamburg, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Newmanstown, Leesport,
Shoemakersville, Bernville, Spring Ridge, Fairview Hgts, Shillington,
West Reading, Mount Penn, Mohnton and Kenhorst.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
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 4031 7565 4022 7600 4032 7617 4036 7621
      4036 7622 4042 7631 4056 7596
TIME...MOT...LOC 0019Z 236DEG 22KT 4042 7626 4035 7604 4027 7594 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh	40 min
May 19, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	65 min
May 19, 7:36 PM EDT	Special Weather Statement	PHI	Schuylkill	39 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019 Every severe thunderstorm warning in 2019

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.