Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2011, 2:42 PM EDT for Berks County, Chester County, Lehigh County, Pennsylvania. It was in force for 52 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
- Jun 1, 2011, 2:42 PM EDT (18:42 UTC)
- Expired
- Jun 1, 2011, 3:34 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Chester County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 147 km from the middle of the area, began a volume at 18:43 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 1, 12:58 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.7 hours before the alert went out and 116 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
- 2843 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 319 m²/s²
- 0-3 km storm-relative helicity
- 336 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
039
WUUS51 KPHI 011842
SVRPHI
PAC011-029-077-011945-
/O.NEW.KPHI.SV.W.0078.110601T1842Z-110601T1945Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
242 PM EDT WED JUN 1 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BERKS COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF READING...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
EXTREME NORTH CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 345 PM EDT
* AT 238 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
AN AREA OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG FROM HAMBURG TO 11 MILES WEST OF STRAUSSTOWN
TO 9 MILES SOUTHWEST OF WOMELSDORF...OR FROM 20 MILES NORTH OF
READING TO 28 MILES NORTHWEST OF READING TO 18 MILES NORTH OF
LANCASTER...AND MOVING EAST AT 35 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
WOMELSDORF AROUND 250 PM EDT...
STRAUSSTOWN AROUND 255 PM EDT...
WANAMAKERS...WERNERSVILLE AND BERNVILLE AROUND 300 PM EDT...
SINKING SPRING...LENHARTSVILLE AND HAMBURG AROUND 305 PM EDT...
WYOMISSING AROUND 310 PM EDT...
CLAUSSVILLE AROUND 315 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4051 7643 4054 7618 4060 7605 4059 7603
4064 7601 4069 7589 4072 7554 4065 7549
4065 7547 4051 7550 4018 7576 4019 7599
4036 7621 4036 7624 4049 7644
TIME...MOT...LOC 1841Z 270DEG 30KT 4059 7603 4054 7636
4030 7630
$$
MPD2 follow-up statements
703
WWUS51 KPHI 011914
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
314 PM EDT WED JUN 1 2011
PAC029-011923-
/O.CAN.KPHI.SV.W.0078.000000T0000Z-110601T1945Z/
CHESTER PA-
314 PM EDT WED JUN 1 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CHESTER COUNTY
IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.
LAT...LON 4048 7610 4054 7618 4060 7605 4059 7603
4064 7601 4069 7589 4072 7554 4065 7549
4065 7547 4051 7550 4043 7556
TIME...MOT...LOC 1913Z 265DEG 33KT 4059 7594
$$
PAC011-077-011945-
/O.CON.KPHI.SV.W.0078.000000T0000Z-110601T1945Z/
BERKS PA-LEHIGH PA-
314 PM EDT WED JUN 1 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR LEHIGH AND NORTHERN BERKS COUNTIES...
AT 308 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR PORT CLINTON...OR 18 MILES NORTH OF READING...MOVING
EAST AT 35 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
WANAMAKERS BY 320 PM EDT...
6 MILES NORTH OF KUTZTOWN BY 325 PM EDT...
NEW TRIPOLI BY 330 PM EDT...
CLAUSSVILLE BY 335 PM EDT...
SCHNECKSVILLE...NEFFS AND 6 MILES NORTH OF ANCIENT OAKS BY 340 PM
EDT...
COFFEETOWN AND FULLERTON BY 345 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.
&&
LAT...LON 4048 7610 4054 7618 4060 7605 4059 7603
4064 7601 4069 7589 4072 7554 4065 7549
4065 7547 4051 7550 4043 7556
TIME...MOT...LOC 1913Z 265DEG 33KT 4059 7594
$$
AMC883
WWUS51 KPHI 011934
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
334 PM EDT WED JUN 1 2011
PAC011-077-011944-
/O.CAN.KPHI.SV.W.0078.000000T0000Z-110601T1945Z/
BERKS PA-LEHIGH PA-
334 PM EDT WED JUN 1 2011
...THE SEVERE THUNDERSTORM WARNING FOR LEHIGH AND NORTHERN BERKS
COUNTIES IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4048 7610 4054 7618 4060 7605 4059 7603
4064 7601 4069 7589 4072 7554 4065 7549
4065 7547 4051 7550 4043 7556
TIME...MOT...LOC 1934Z 265DEG 33KT 4061 7569
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 60 min |
| Jun 1, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 63 min |
| Jun 1, 3:08 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 16 min |
| Jun 1, 4:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 45 min |
| Jun 1, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.