Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 48, NWS Philadelphia/Mount Holly

May 19, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 19, 2011, 1:29 PM EDT for Berks 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: May 19, 2011, 1:29 PM EDT (17:29 UTC)
Expired: May 19, 2011, 2:30 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 143 km from the middle of the area, began a volume at 17:31 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
May 19, 2:30 PM EDT	HAIL 1	Oley, PA

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, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.5 hours before the alert went out and 101 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: 143 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

244 
WUUS51 KPHI 191729
SVRPHI
PAC011-191830-
/O.NEW.KPHI.SV.W.0048.110519T1729Z-110519T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
129 PM EDT THU MAY 19 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF READING...

* UNTIL 230 PM EDT

* AT 127 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 6 MILES SOUTH OF SINKING SPRING...OR 8 MILES
  SOUTHWEST OF READING...AND MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SINKING SPRING AND WERNERSVILLE AROUND 155 PM EDT...
  WYOMISSING AND READING AROUND 200 PM EDT...
  LAURELDALE AROUND 220 PM EDT...
  7 MILES EAST OF BERNVILLE AROUND 225 PM EDT...
  LEESPORT...SHOEMAKERSVILLE AND 9 MILES WEST OF FLEETWOOD AROUND 230
  PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4057 7611 4047 7572 4016 7591 4020 7599
      4030 7615
TIME...MOT...LOC 1729Z 190DEG 11KT 4025 7602

$$

HEAVENER

2 follow-up statements

599 
WWUS51 KPHI 191754
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
154 PM EDT THU MAY 19 2011

PAC011-191830-
/O.CON.KPHI.SV.W.0048.000000T0000Z-110519T1830Z/
BERKS PA-
154 PM EDT THU MAY 19 2011

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

AT 152 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR WEST WYOMISSING...OR NEAR
READING...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WYOMISSING HILLS...WYOMISSING...WEST READING AND READING BY 200 PM
  EDT...
  LAURELDALE BY 220 PM EDT...
  TEMPLE BY 225 PM EDT...
  LEESPORT...CENTERPORT...SHOEMAKERSVILLE AND 8 MILES WEST OF
  FLEETWOOD BY 230 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4023 7604 4055 7603 4047 7572 4016 7591
      4020 7599
TIME...MOT...LOC 1754Z 190DEG 11KT 4033 7600

$$

HEAVENER

538 
WWUS51 KPHI 191815
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
215 PM EDT THU MAY 19 2011

PAC011-191830-
/O.CON.KPHI.SV.W.0048.000000T0000Z-110519T1830Z/
BERKS PA-
215 PM EDT THU MAY 19 2011

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

AT 209 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR WYOMISSING HILLS...OR NEAR
READING...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TEMPLE BY 225 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4024 7601 4046 7596 4043 7574 4019 7590
      4021 7598
TIME...MOT...LOC 1814Z 190DEG 11KT 4039 7599

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 12:31 PM EDT	Special Weather Statement	PHI	Berks	89 min
May 19, 1:26 PM EDT	Areal Flood Advisory	PHI	Berks	5 hr
May 19, 2:22 PM EDT	Severe Thunderstorm Warning	PHI	Berks	41 min
May 19, 2:54 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Northampton	3 hr
May 19, 3:00 PM EDT	Special Weather Statement	PHI	Carbon	60 min
May 19, 3:01 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
May 19, 3:05 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	55 min
May 19, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	63 min
May 19, 3:15 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery, Philadelphia	60 min
May 19, 3:37 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	53 min
May 19, 3:40 PM EDT	Areal Flood Advisory	PHI	Bucks, Lehigh, Monroe, Northampton	5 hr
May 19, 3:52 PM EDT	Coastal Flood Statement	PHI	Delaware, Philadelphia	8 hr
May 19, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	54 min
May 19, 4:18 PM EDT	Special Weather Statement	PHI	Monroe	57 min
May 19, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	55 min
May 19, 4:28 PM EDT	Special Weather Statement	PHI	Bucks	62 min
May 19, 4:31 PM EDT	Special Weather Statement	PHI	Bucks	59 min
May 19, 4:39 PM EDT	Flash Flood Warning	PHI	Bucks, Monroe, Northampton	4 hr
May 19, 4:50 PM EDT	Special Weather Statement	PHI	Monroe	55 min
May 19, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	50 min
May 19, 7:23 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	82 min
May 19, 7:50 PM EDT	Special Weather Statement	PHI	Philadelphia	55 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning in 2011

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.