Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 181, NWS Philadelphia/Mount Holly

August 16, 2016Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 16, 2016, 4:23 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 52 min. 4 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 16, 2016, 4:23 PM EDT (20:23 UTC)
Expired
Aug 16, 2016, 5:15 PM EDT
In force
52 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), 142 km from the middle of the area, began a volume at 20:24 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

TimeReportWhereRemark
Aug 16, 4:52 PM EDTTSTM WND GST 48Reading Regional Airpor, PA
Aug 16, 5:05 PM EDTTSTM WND DMGWest Reading, PAFEW TREES DOWN
Aug 16, 5:06 PM EDTTSTM WND DMGPerry Twp, PAFEW TREES DOWN
Aug 16, 5:22 PM EDTTSTM WND DMGRichmond Twp, PAFEW TREES DOWN

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.

IssuedProductOfficeLasted
Aug 16, 3:20 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.4 hours before the alert went out and 195 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2016-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 364 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2016-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
364 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
773 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

222 
WUUS51 KPHI 162023
SVRPHI
PAC011-029-091-162115-
/O.NEW.KPHI.SV.W.0181.160816T2023Z-160816T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 PM EDT TUE AUG 16 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  BERKS COUNTY IN EASTERN PENNSYLVANIA...
  WEST CENTRAL MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 515 PM EDT

* AT 422 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR LICKDALE TO NEAR LANCASTER...MOVING EAST AT 45
  MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  READING...WEST CHESTER...POTTSTOWN...PHOENIXVILLE...COATESVILLE...
  WYOMISSING...DOWNINGTOWN...BIRDSBORO...KUTZTOWN...ROYERSFORD...
  HAMBURG...FLEETWOOD...SINKING SPRING...LAURELDALE...PARKESBURG...
  WOMELSDORF...WERNERSVILLE...NEWMANSTOWN...LEESPORT AND ADAMSTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
      4064 7598 4068 7589 4031 7553 3999 7545
      3988 7599 3995 7600 4004 7593 4011 7594
      4014 7588 4049 7643
TIME...MOT...LOC 2022Z 255DEG 39KT 4050 7650 4008 7629 

HAIL...<.75IN
WIND...60MPH
 
$$

PO
2 follow-up statements
417 
WWUS51 KPHI 162050
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
450 PM EDT TUE AUG 16 2016

PAC011-029-091-162115-
/O.CON.KPHI.SV.W.0181.000000T0000Z-160816T2115Z/
CHESTER PA-BERKS PA-MONTGOMERY PA-
450 PM EDT TUE AUG 16 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CENTRAL CHESTER...BERKS AND WEST CENTRAL MONTGOMERY COUNTIES...

AT 449 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR STRAUSSTOWN TO NEAR SINKING SPRING TO TERRE HILL
TO LEOLA...MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
READING...WEST CHESTER...POTTSTOWN...PHOENIXVILLE...COATESVILLE...
WYOMISSING...DOWNINGTOWN...BIRDSBORO...KUTZTOWN...ROYERSFORD...
HAMBURG...FLEETWOOD...SINKING SPRING...LAURELDALE...PARKESBURG...
WERNERSVILLE...LEESPORT...HONEY BROOK...SHOEMAKERSVILLE AND ELVERSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4043 7616 4047 7622 4058 7605 4057 7602
      4064 7598 4068 7589 4031 7553 3999 7545
      3988 7599 3995 7600 4004 7593 4011 7594
      4014 7588 4034 7613
TIME...MOT...LOC 2049Z 249DEG 34KT 4053 7617 4030 7599 4016 7606 4007
7619

HAIL...<.75IN
WIND...60MPH
 
$$

PO
660 
WWUS51 KPHI 162105
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
505 PM EDT TUE AUG 16 2016

PAC029-091-162115-
/O.CAN.KPHI.SV.W.0181.000000T0000Z-160816T2115Z/
CHESTER PA-MONTGOMERY PA-
505 PM EDT TUE AUG 16 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHESTER AND WEST
CENTRAL MONTGOMERY COUNTIES IS CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED...THEREFORE THE
WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT FOR
EASTERN AND SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4058 7605 4057 7602 4064 7598 4068 7589
      4049 7570 4037 7559 4025 7569 4014 7587
      4034 7613 4043 7616 4047 7622
TIME...MOT...LOC 2105Z 255DEG 39KT 4057 7599 4034 7581 4020 7588 4011
7602

$$

PAC011-162115-
/O.CON.KPHI.SV.W.0181.000000T0000Z-160816T2115Z/
BERKS PA-
505 PM EDT TUE AUG 16 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR BERKS COUNTY...

AT 505 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HAMBURG TO NEAR BIRDSBORO TO NEW MORGAN TO NEAR
CHURCHTOWN...MOVING EAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
READING...WYOMISSING...BIRDSBORO...KUTZTOWN...HAMBURG...FLEETWOOD...
SINKING SPRING...LAURELDALE...WERNERSVILLE...TOPTON...LEESPORT...
SHOEMAKERSVILLE...BERNVILLE...BECHTELSVILLE...LYONS...STRAUSSTOWN...
LENHARTSVILLE...NEW MORGAN...FAIRVIEW HGTS AND SPRING RIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4058 7605 4057 7602 4064 7598 4068 7589
      4049 7570 4037 7559 4025 7569 4014 7587
      4034 7613 4043 7616 4047 7622
TIME...MOT...LOC 2105Z 255DEG 39KT 4057 7599 4034 7581 4020 7588 4011
7602

HAIL...<.75IN
WIND...60MPH
 
$$

PO

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 4:08 PM EDTSpecial Weather StatementPHIBerks67 min
Aug 16, 5:08 PM EDTSpecial Weather StatementPHIChester52 min
Aug 16, 5:10 PM EDTSpecial Weather StatementPHICarbon35 min
Aug 16, 5:19 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh, Northampton41 min
Aug 16, 5:36 PM EDTSpecial Weather StatementPHIChester, Delaware54 min
Aug 16, 5:44 PM EDTSpecial Weather StatementPHICarbon, Monroe61 min
Aug 16, 6:31 PM EDTSpecial Weather StatementPHIDelaware29 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2016Every severe thunderstorm warning in 2016

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.