Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 317, NWS Philadelphia/Mount Holly

August 7, 2019Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2019, 1:46 PM EDT for Berks County, Pennsylvania. It was in force for 44 min. 3 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: Aug 7, 2019, 1:46 PM EDT (17:46 UTC)
Expired: Aug 7, 2019, 2:30 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Berks County, PA

The radar

The State College radar (KCCX), 160 km from the middle of the area, began a volume at 17:46 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
Aug 7, 2:07 PM EDT	TSTM WND DMG	2 Nnw Marion Twp, PA	TREE AND WIRES DOWN AND POWER OUT IN THE AREA OF PARKSIDE INN ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 2:16 PM EDT	TSTM WND DMG	1 Sse Jefferson Twp, PA	DOWNED TREE ON SUMMER MOUNTAIN ROAD JUST EAST OF ZERBE ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 2:40 PM EDT	TSTM WND DMG	2 Wsw Hamburg, PA	DELAYED REPORT. SIGNIFICANT DAMAGE IN THE AREA OF 323 CLAYTON AVE IN TILDEN TWP. NUMEROUS TREES DOWNED AND THE ROOF OF AN OLD BARN REMOVED. LOCAL EMA COORDINATOR BELIEVES STRAIGHT LINE WINDS TO BE RESPONSIBLE. 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, 5.8 hours before the alert went out and 204 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: 371 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

160 
WUUS51 KPHI 071746
SVRPHI
PAC011-071830-
/O.NEW.KPHI.SV.W.0317.190807T1746Z-190807T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
146 PM EDT Wed Aug 7 2019

The National Weather Service in Mount Holly NJ has issued a

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

* Until 230 PM EDT.

* At 146 PM EDT, a severe thunderstorm was located over
  Fredericksburg, or 9 miles northwest of Myerstown, moving northeast
  at 20 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...
  Hamburg, Shoemakersville, Strausstown and Centerport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
      4058 7605 4057 7602 4059 7601 4052 7592
      4039 7627 4049 7643
TIME...MOT...LOC 1746Z 232DEG 18KT 4048 7643 

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

SFJ

2 follow-up statements

071 
WWUS51 KPHI 071813
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
213 PM EDT Wed Aug 7 2019

PAC011-071830-
/O.CON.KPHI.SV.W.0317.000000T0000Z-190807T1830Z/
Berks PA-
213 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR NORTHWESTERN BERKS COUNTY...

At 213 PM EDT, a severe thunderstorm was located over Strausstown, or
8 miles south of Schuylkill Haven, moving northeast at 20 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...
Hamburg, Shoemakersville, Strausstown and Centerport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4052 7625 4054 7617 4056 7613 4058 7605
      4057 7602 4059 7601 4052 7592 4042 7618
TIME...MOT...LOC 1813Z 247DEG 19KT 4051 7621 

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

SFJ

619 
WWUS51 KPHI 071822
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
222 PM EDT Wed Aug 7 2019

PAC011-071832-
/O.EXP.KPHI.SV.W.0317.000000T0000Z-190807T1830Z/
Berks PA-
222 PM EDT Wed Aug 7 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BERKS COUNTY WILL
EXPIRE AT 230 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 are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 900 PM EDT for
eastern Pennsylvania.

LAT...LON 4052 7625 4054 7617 4056 7613 4058 7605
      4057 7602 4059 7601 4052 7592 4042 7618
TIME...MOT...LOC 1822Z 232DEG 18KT 4054 7617 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:02 AM EDT	Flash Flood Watch	PHI	Bucks, Delaware, Montgomery, Philadelphia	11 hr
Aug 7, 1:02 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Aug 7, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	38 min
Aug 7, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Aug 7, 2:01 PM EDT	Areal Flood Advisory	PHI	Bucks	97 min
Aug 7, 2:59 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	31 min
Aug 7, 3:01 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Aug 7, 3:02 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	43 min
Aug 7, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	42 min
Aug 7, 3:24 PM EDT	Flash Flood Warning	PHI	Berks	106 min
Aug 7, 3:24 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	51 min
Aug 7, 3:30 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	30 min
Aug 7, 3:31 PM EDT	Special Weather Statement	PHI	Philadelphia	44 min
Aug 7, 3:41 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	91 min
Aug 7, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	51 min
Aug 7, 4:03 PM EDT	Special Weather Statement	PHI	Philadelphia	42 min
Aug 7, 4:06 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Aug 7, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	66 min
Aug 7, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Monroe, Northampton	46 min
Aug 7, 4:20 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	4 hr
Aug 7, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	63 min
Aug 7, 4:44 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 7, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	59 min
Aug 7, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	78 min
Aug 7, 6:01 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	3 hr
Aug 7, 6:10 PM EDT	River Flood Warning	PHI	Delaware	119 min
Aug 7, 7:42 PM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr

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; radar from the NEXRAD Level II archive.