Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 168, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 5, 2012, 5:22 PM EDT for 4 counties in New Jersey; New Castle County, Delaware; 8 counties in Pennsylvania. It was in force for 68 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
- Aug 5, 2012, 5:22 PM EDT (21:22 UTC)
- Expired
- Aug 5, 2012, 6:30 PM EDT
- In force
- 68 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Gloucester County, NJ, Hunterdon County, NJ, Salem County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 21:21 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 |
|---|---|---|---|
| Aug 5, 5:51 PM EDT | TSTM WND DMG | Graterford, PA | LARGE TREE LIMBS DOWN... RANGING FROM 4 TO 8 FEET IN LENGTH. |
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 |
|---|---|---|---|
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.4 hours before the alert went out and 208 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
- 2201 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
717
WUUS51 KPHI 052122
SVRPHI
DEC003-NJC015-019-033-041-PAC011-017-029-045-077-091-095-101-052230-
/O.NEW.KPHI.SV.W.0168.120805T2122Z-120805T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
522 PM EDT SUN AUG 5 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
EASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF ALLENTOWN...
CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF EASTON...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF WILMINGTON...
WESTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
SOUTHERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF WEST CHESTER...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
WESTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
NORTH CENTRAL SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 630 PM EDT
* AT 517 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 NEAR NEW TRIPOLI TO FLEETWOOD
TO HONEY BROOK TO OXFORD...AND MOVING EAST AT 35 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
GLENMOORE...CEDARVILLE...COATESVILLE AND BECHTELSVILLE AROUND 535
PM EDT...
ALLENTOWN...ZIONSVILLE...PUGHTOWN AND KEMBLESVILLE AROUND 540 PM
EDT...
ZIONSVILLE AND LADENBERG AROUND 545 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 900 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4081 7549 4082 7542 4076 7496 4078 7489
4074 7479 3996 7512 3995 7514 3971 7522
3973 7598
TIME...MOT...LOC 2121Z 273DEG 28KT 4059 7569 3973 7606
$$
IOVINO1 follow-up statement
362
WWUS51 KPHI 052201
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
601 PM EDT SUN AUG 5 2012
PAC011-052209-
/O.CAN.KPHI.SV.W.0168.000000T0000Z-120805T2230Z/
BERKS PA-
601 PM EDT SUN AUG 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTRORMS HAVE MOVED TO THE EAST OF BERKS COUNTY.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4076 7496 4078 7489 4074 7479 3996 7512
3994 7515 3971 7522 3973 7582 4081 7534
TIME...MOT...LOC 2159Z 273DEG 28KT 4057 7530 3971 7568
$$
DEC003-NJC015-019-033-041-PAC017-029-045-077-091-095-101-052230-
/O.CON.KPHI.SV.W.0168.000000T0000Z-120805T2230Z/
WARREN NJ-HUNTERDON NJ-BUCKS PA-LEHIGH PA-MONTGOMERY PA-
PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-NORTHAMPTON PA-
NEW CASTLE DE-CHESTER PA-SALEM NJ-
601 PM EDT SUN AUG 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTH CENTRAL SALEM...EASTERN CHESTER...NORTHERN NEW CASTLE...
CENTRAL NORTHAMPTON...NORTHWESTERN GLOUCESTER...DELAWARE...WESTERN
PHILADELPHIA...MONTGOMERY...SOUTHEASTERN LEHIGH...BUCKS...WESTERN
HUNTERDON AND SOUTHERN WARREN COUNTIES...
AT 556 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 NEAR EASTON TO PHOENIXVILLE
TO KENNETT SQUARE...MOVING EAST AT 30 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
VALLEY FORGE...ELAM...CONCORDVILLE AND CHEYNEY BY 605 PM EDT...
RIEGELSVILLE...GRADYVILLE...CHELSEA AND WEST NORRITON BY 610 PM
EDT...
REVERE AND OTTSVILLE BY 615 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.
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 900 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4076 7496 4078 7489 4074 7479 3996 7512
3994 7515 3971 7522 3973 7582 4081 7534
TIME...MOT...LOC 2159Z 273DEG 28KT 4057 7530 3971 7568
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:49 AM EDT | Flash Flood Watch | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 16 hr |
| Aug 5, 1:00 PM EDT | Special Weather Statement | PHI | Warren | 30 min |
| Aug 5, 1:20 PM EDT | Special Weather Statement | PHI | Sussex | 85 min |
| Aug 5, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 77 min |
| Aug 5, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 82 min |
| Aug 5, 5:52 PM EDT | Special Marine Warning | PHI | 83 min | |
| Aug 5, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 3 more | 74 min |
| Aug 5, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 39 min |
| Aug 5, 7:09 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 66 min |
| Aug 5, 7:30 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland, Monmouth, Ocean | 60 min |
| Aug 5, 7:38 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Ocean | 67 min |
| Aug 5, 7:40 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 5, 12:15 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 45 min |
| Aug 5, 12:29 PM EDT | Special Weather Statement | PHI | Northampton | 31 min |
| Aug 5, 1:03 PM EDT | Special Weather Statement | PHI | Monroe | 27 min |
| Aug 5, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 78 min |
| Aug 5, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 67 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2012Severe Thunderstorm Warnings in New Jersey, 2012Severe Thunderstorm Warnings in Delaware, 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.