Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

June 25, 2013Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 25, 2013, 9:14 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 61 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
Jun 25, 2013, 9:14 PM EDT (01:14 UTC)
Expired
Jun 25, 2013, 10:15 PM EDT
In force
61 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 01:17 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
Jun 25, 9:45 PM EDTTSTM WND DMGJefferson Twp, PATREES AND WIRES DOWN IN THE WESTERN PART OF THE COUNTY.

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
Jun 25, 8:46 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.2 hours before the alert went out and 227 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 00:00Z on 2013-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 813 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 00:00Z on 2013-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
813 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1785 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

071 
WUUS51 KPHI 260114
SVRPHI
PAC011-077-260215-
/O.NEW.KPHI.SV.W.0046.130626T0114Z-130626T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
914 PM EDT TUE JUN 25 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BERKS COUNTY IN EASTERN PENNSYLVANIA...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 1015 PM EDT

* AT 908 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  RINGTOWN TO LAWN...MOVING EAST AT 50 MPH. THESE STORMS ARE CAPABLE
  OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  STRAUSSTOWN AROUND 935 PM EDT...
  WOMELSDORF AND HAMBURG AROUND 940 PM EDT...
  WANAMAKERS AND SHOEMAKERSVILLE AROUND 945 PM EDT...
  LEESPORT AND WERNERSVILLE AROUND 950 PM EDT...
  SCHNECKSVILLE AND WYOMISSING AROUND 955 PM EDT...
  TOPTON AND READING AROUND 1000 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE ACROSS CENTRAL PENNSYLVANIA OVER THE PAST FEW HOURS. WHEN 
STORMS APPROACH SEEK SHELTER INDOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT
WEDNESDAY MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4052 7625 4058 7603 4065 7599 4079 7561
      4074 7560 4072 7556 4074 7553 4066 7548
      4067 7543 4063 7539 4058 7541 4055 7536
      4043 7550 4044 7554 4026 7568 4013 7588
      4049 7644 4050 7644
TIME...MOT...LOC 0112Z 278DEG 44KT 4088 7618 4012 7694

$$

FORECASTER: AMC
1 follow-up statement
046 
WWUS51 KPHI 260146
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
946 PM EDT TUE JUN 25 2013

PAC011-077-260215-
/O.CON.KPHI.SV.W.0046.000000T0000Z-130626T0215Z/
BERKS PA-LEHIGH PA-
946 PM EDT TUE JUN 25 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR LEHIGH AND BERKS COUNTIES...

AT 945 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 8 MILES NORTHWEST OF HAMBURG TO 21 MILES SOUTHWEST OF
WOMELSDORF...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
WOMELSDORF AND HAMBURG AROUND 955 PM EDT...
WANAMAKERS AND LEESPORT AROUND 1000 PM EDT...
NEW TRIPOLI AND JORDAN VALLEY AROUND 1005 PM EDT...
SCHNECKSVILLE AND NEFFS AROUND 1010 PM EDT...
TOPTON AND LORANE AROUND 1015 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT
WEDNESDAY MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4052 7625 4058 7603 4065 7599 4079 7561
      4074 7560 4072 7556 4074 7553 4066 7548
      4067 7543 4063 7539 4058 7541 4055 7536
      4043 7550 4044 7554 4026 7568 4013 7588
      4049 7644 4050 7644
TIME...MOT...LOC 0146Z 278DEG 41KT 4066 7605 4016 7646

$$

FORECASTER: AMC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 9:09 PM EDTSpecial Weather StatementPHICarbon, Northampton51 min
Jun 25, 10:01 PM EDTSpecial Weather StatementPHICarbon, Monroe, Northampton119 min
Jun 25, 10:07 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery53 min
Jun 25, 10:47 PM EDTSpecial Weather StatementPHIDelaware, Montgomery, Philadelphia58 min
Jun 26, 3:28 PM EDTSpecial Weather StatementPHIMontgomery32 min
Jun 26, 3:53 PM EDTSpecial Weather StatementPHIMontgomery37 min
Jun 26, 6:26 PM EDTSpecial Weather StatementPHIChester64 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013Every severe thunderstorm warning in 2013

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.