Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 203, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2011, 4:40 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 65 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
- Jul 29, 2011, 4:40 PM EDT (20:40 UTC)
- Expired
- Jul 29, 2011, 5:45 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 145 km from the middle of the area, began a volume at 20:40 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 |
|---|---|---|---|
| Jul 29, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.7 hours before the alert went out and 212 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
- 529 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1236 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
972
WUUS51 KPHI 292040
SVRPHI
PAC011-077-292145-
/O.NEW.KPHI.SV.W.0203.110729T2040Z-110729T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
440 PM EDT FRI JUL 29 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...
SOUTHERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 545 PM EDT
* AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES
NORTHWEST OF HAMBURG...OR 23 MILES SOUTHWEST OF LEHIGHTON...AND
MOVING SOUTHEAST AT 40 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
HAMBURG AROUND 445 PM EDT...
LENHARTSVILLE AND WANAMAKERS AROUND 455 PM EDT...
KUTZTOWN AND LYONS AROUND 505 PM EDT...
TOPTON AROUND 510 PM EDT...
ANCIENT OAKS AROUND 515 PM EDT...
EMMAUS AROUND 520 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
FRIDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4052 7637 4053 7623 4058 7609 4059 7607
4059 7603 4064 7600 4069 7588 4053 7536
4042 7549 4044 7553 4024 7570 4017 7584
4050 7640
TIME...MOT...LOC 2040Z 293DEG 36KT 4064 7604
$$
JJM1 follow-up statement
497
WWUS51 KPHI 292101
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
501 PM EDT FRI JUL 29 2011
PAC011-077-292145-
/O.CON.KPHI.SV.W.0203.000000T0000Z-110729T2145Z/
BERKS PA-LEHIGH PA-
501 PM EDT FRI JUL 29 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHERN LEHIGH AND NORTHERN BERKS COUNTIES...
AT 457 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR LENHARTSVILLE...OR 18 MILES NORTH OF READING...MOVING
SOUTHEAST AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
KUTZTOWN AND 6 MILES NORTHEAST OF FLEETWOOD BY 515 PM EDT...
LYONS BY 520 PM EDT...
TOPTON BY 525 PM EDT...
ALBURTIS AND ANCIENT OAKS BY 535 PM EDT...
BALLY AND MACUNGIE BY 540 PM EDT...
ZIONSVILLE BY 545 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
FRIDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4059 7607 4059 7603 4064 7600 4069 7588
4053 7536 4042 7549 4044 7553 4028 7567
4052 7622
TIME...MOT...LOC 2101Z 296DEG 24KT 4057 7589
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:44 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 2 hr |
| Jul 29, 5:56 PM EDT | Special Weather Statement | PHI | Bucks | 64 min |
| Jul 29, 6:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 55 min |
| Jul 29, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 49 min |
| Jul 29, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 46 min |
| Jul 29, 7:13 PM EDT | Special Weather Statement | PHI | Montgomery | 62 min |
| Jul 29, 7:31 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery, Philadelphia | 59 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.