Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 167, NWS Philadelphia/Mount Holly

August 1, 2016Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 1, 2016, 9:12 PM EDT for Berks County, Pennsylvania. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 1, 2016, 9:12 PM EDT (01:12 UTC)
Expired
Aug 1, 2016, 10:00 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

The radar

The Philadelphia radar (KDIX), 158 km from the middle of the area, began a volume at 01:12 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.2 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2016-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 586 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 2016-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.19395878Sfc1 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
586 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1553 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

939 
WUUS51 KPHI 020112
SVRPHI
PAC011-020200-
/O.NEW.KPHI.SV.W.0167.160802T0112Z-160802T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
912 PM EDT MON AUG 1 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

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

* UNTIL 1000 PM EDT

* AT 911 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER STRAUSSTOWN...
  OR 9 MILES NORTHEAST OF MYERSTOWN...MOVING SOUTHEAST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  READING...WYOMISSING...HAMBURG...SINKING SPRING...LAURELDALE...
  WOMELSDORF...WERNERSVILLE...LEESPORT...SHOEMAKERSVILLE...BERNVILLE...
  STRAUSSTOWN...SPRING RIDGE...FAIRVIEW HGTS...CENTERPORT...WEST LAWN...
  WEST WYOMISSING...WYOMISSING HILLS AND WHITFIELD.

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.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4047 7635 4052 7626 4054 7617 4056 7613
      4058 7605 4057 7602 4058 7601 4048 7583
      4025 7605
TIME...MOT...LOC 0111Z 292DEG 11KT 4049 7620 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
559 
WWUS51 KPHI 020144
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
944 PM EDT MON AUG 1 2016

PAC011-020200-
/O.CON.KPHI.SV.W.0167.000000T0000Z-160802T0200Z/
BERKS PA-
944 PM EDT MON AUG 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR CENTRAL BERKS COUNTY...

AT 944 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BERNVILLE...OR
11 MILES NORTHWEST OF READING...MOVING EAST AT 15 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
READING...WYOMISSING...HAMBURG...SINKING SPRING...LAURELDALE...
WOMELSDORF...WERNERSVILLE...LEESPORT...SHOEMAKERSVILLE...BERNVILLE...
STRAUSSTOWN...SPRING RIDGE...FAIRVIEW HGTS...CENTERPORT...WEST LAWN...
WEST WYOMISSING...WYOMISSING HILLS AND WHITFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4047 7635 4052 7626 4054 7617 4056 7613
      4058 7605 4057 7602 4058 7601 4048 7583
      4025 7605
TIME...MOT...LOC 0144Z 292DEG 11KT 4045 7608 

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

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 9:09 PM EDTSpecial Weather StatementPHIBerks81 min
Aug 1, 9:48 PM EDTAreal Flood AdvisoryPHIBerks4 hr
Aug 1, 10:00 PM EDTSpecial Weather StatementPHIBerks90 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.