Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 69, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 26, 2011, 8:11 PM EDT for Berks County, Pennsylvania. It was in force for 48 min. 2 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
- May 26, 2011, 8:11 PM EDT (00:11 UTC)
- Expired
- May 26, 2011, 8:59 PM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 160 km from the middle of the area, began a volume at 00:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 26, 8:35 PM EDT | TSTM WND DMG | Reading, PA | LIMBS ON THE GROUND |
| May 26, 8:50 PM EDT | TSTM WND DMG | Maiden Creek, PA | LIMBS DOWN. POWER POLE DAMAGED. |
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 00:00Z, 0.2 hours before the alert went out and 201 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.
- Mixed-layer CAPE
- 935 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1937 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
765
WUUS51 KPHI 270011
SVRPHI
PAC011-270115-
/O.NEW.KPHI.SV.W.0069.110527T0011Z-110527T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
811 PM EDT THU MAY 26 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF READING...
* UNTIL 915 PM EDT
* AT 808 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 15 MILES WEST OF STRAUSSTOWN TO 20 MILES
SOUTHWEST OF WOMELSDORF...OR ALONG A LINE EXTENDING FROM 32 MILES
NORTHWEST OF READING TO 8 MILES NORTHWEST OF LANCASTER...AND MOVING
NORTHEAST AT 30 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
WOMELSDORF AND STRAUSSTOWN AROUND 840 PM EDT...
BERNVILLE AROUND 850 PM EDT...
WERNERSVILLE AROUND 855 PM EDT...
SINKING SPRING AROUND 900 PM EDT...
WYOMISSING AND READING AROUND 905 PM EDT...
SHOEMAKERSVILLE...LEESPORT AND HAMBURG AROUND 910 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.
&&
LAT...LON 4053 7634 4052 7630 4054 7618 4060 7605
4059 7603 4064 7601 4067 7592 4025 7584
4020 7599 4036 7621 4036 7624 4047 7640
4050 7644
TIME...MOT...LOC 0010Z 230DEG 25KT 4058 7643 4013 7639
$$
RPW2 follow-up statements
142
WWUS51 KPHI 270041
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
841 PM EDT THU MAY 26 2011
PAC011-270115-
/O.CON.KPHI.SV.W.0069.000000T0000Z-110527T0115Z/
BERKS PA-
841 PM EDT THU MAY 26 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR CENTRAL BERKS COUNTY...
AT 839 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 8 MILES NORTH OF PORT CLINTON TO MOHNTON...OR ALONG A
LINE EXTENDING FROM 18 MILES SOUTHWEST OF LEHIGHTON TO 9 MILES SOUTH
OF READING...MOVING NORTHEAST AT 30 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
WEST READING...SHOEMAKERSVILLE...READING AND LEESPORT BY 845 PM
EDT...
MOUNT PENN...TEMPLE...LAURELDALE AND FLYING HILLS BY 850 PM EDT...
ST. LAWRENCE AND REIFFTON BY 855 PM EDT...
LAT...LON 4034 7618 4040 7613 4049 7622 4054 7621
4054 7618 4060 7605 4059 7603 4064 7601
4067 7592 4025 7584 4020 7599
TIME...MOT...LOC 0040Z 230DEG 25KT 4071 7601 4022 7598
$$
RPW818
WWUS51 KPHI 270059
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
859 PM EDT THU MAY 26 2011
PAC011-270104-
/O.CAN.KPHI.SV.W.0069.000000T0000Z-110527T0115Z/
BERKS PA-
859 PM EDT THU MAY 26 2011
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BERKS COUNTY IS
CANCELLED...
THE THUNDERSTORMS THAT WERE PRODUCING THE SEVERE WEATHER HAVE MOVED
OUT OF THE AREA.
LAT...LON 4034 7618 4040 7613 4049 7622 4054 7621
4054 7618 4060 7605 4059 7603 4064 7601
4067 7592 4025 7584 4020 7599
TIME...MOT...LOC 0054Z 230DEG 25KT 4077 7591 4028 7588
$$
RPWThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 8:46 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 59 min |
| May 26, 8:50 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 55 min |
| May 26, 9:44 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 61 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2011Every 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.