Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 7, 2012, 5:07 PM EDT for 5 counties in Pennsylvania. It was in force for 53 min. 6 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
- Jul 7, 2012, 5:07 PM EDT (21:07 UTC)
- Expired
- Jul 7, 2012, 6:00 PM EDT
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 21:09 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 |
|---|---|---|---|
| Jul 7, 5:25 PM EDT | TSTM WND DMG | Beaver Meadows, PA | NUMEROUS TREES DOWN IN CARBON COUNTY FROM AROUND BEAVER MEADOWS TO AROUND BOWMANSTOWN. |
| Jul 7, 5:45 PM EDT | TSTM WND DMG | Slatington, PA | DOWNED TREES |
| Jul 7, 5:45 PM EDT | TSTM WND DMG | Walnutport, PA | LARGE LIMBS DOWN. |
| Jul 7, 5:55 PM EDT | TSTM WND DMG | Allentown, PA | SEPARATE REPORT... LARGE TREE LIMBS DOWN. |
| Jul 7, 5:56 PM EDT | TSTM WND GST 50 | Allentown Airport, PA | |
| Jul 7, 6:00 PM EDT | TSTM WND GST 68 | Allentown, 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 |
|---|---|---|---|
| Jul 7, 11:41 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 236 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
- 1804 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1395 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
147
WUUS51 KPHI 072107
SVRPHI
PAC011-025-077-089-095-072200-
/O.NEW.KPHI.SV.W.0078.120707T2107Z-120707T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
507 PM EDT SAT JUL 7 2012
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...
THIS INCLUDES THE CITY OF ALLENTOWN...
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF EASTON...
CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF LEHIGHTON...
SOUTHWESTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
* UNTIL 600 PM EDT
* AT 504 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 17 MILES NORTHWEST OF WEATHERLY
TO 20 MILES WEST OF WEATHERLY TO 27 MILES NORTHWEST OF STRAUSSTOWN
TO 42 MILES NORTHWEST OF STRAUSSTOWN TO 57 MILES NORTHWEST OF
STRAUSSTOWN...AND MOVING SOUTHEAST AT 35 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
WEATHERLY AND NESQUEHONING AROUND 525 PM EDT...
CHRISTMANS...NEW MAHONING AND JIM THORPE AROUND 530 PM EDT...
PENN FOREST RESERVOIR...WANAMAKERS...BELTZVILLE STATE PARK AND
LEHIGHTON AROUND 535 PM EDT...
NEW TRIPOLI AROUND 540 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
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 700 PM EDT
SATURDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4058 7602 4065 7599 4074 7577 4091 7600
4101 7575 4108 7578 4112 7572 4105 7557
4068 7518 4060 7522 4050 7540 4042 7548
4044 7553 4037 7559 4028 7593 4029 7613
4049 7643
TIME...MOT...LOC 2107Z 311DEG 45KT 4113 7597 4091 7616
4081 7641 4084 7678 4086 7710
$$
HAYES1 follow-up statement
088
WWUS51 KPHI 072125
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
525 PM EDT SAT JUL 7 2012
PAC011-025-077-089-095-072200-
/O.CON.KPHI.SV.W.0078.000000T0000Z-120707T2200Z/
BERKS PA-LEHIGH PA-MONROE PA-CARBON PA-NORTHAMPTON PA-
525 PM EDT SAT JUL 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHERN NORTHAMPTON...CARBON...SOUTHWESTERN MONROE...LEHIGH AND
BERKS COUNTIES...
AT 521 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM WEATHERLY TO 43 MILES
NORTHWEST OF STRAUSSTOWN...MOVING SOUTHEAST AT 40 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
CHRISTMANS...NEW MAHONING AND JIM THORPE BY 530 PM EDT...
PENN FOREST RESERVOIR...WANAMAKERS...BELTZVILLE STATE PARK AND
WEISSPORT EAST BY 535 PM EDT...
NEW TRIPOLI...JORDAN VALLEY AND EMERALD BY 540 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
SATURDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4050 7641 4058 7602 4065 7599 4074 7577
4091 7600 4101 7574 4108 7578 4112 7572
4105 7557 4068 7518 4060 7522 4050 7540
4042 7548 4044 7553 4037 7559 4028 7593
4029 7612 4048 7643
TIME...MOT...LOC 2125Z 311DEG 45KT 4097 7575 4075 7595
4065 7620 4069 7657 4071 7689
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 4:49 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Northampton | 86 min |
| Jul 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 63 min |
| Jul 7, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 48 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012
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.