Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 5, 2011, 10:16 AM EDT for 4 counties in Pennsylvania; 6 counties in New Jersey; New Castle County, Delaware. It was in force for 44 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
- Apr 5, 2011, 10:16 AM EDT (14:16 UTC)
- Expired
- Apr 5, 2011, 11:00 AM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 14:16 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 |
|---|---|---|---|
| Apr 5, 10:27 AM EDT | TSTM WND GST 61 | Folcroft, PA | WIND GUST OF 61 MPH |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 2.3 hours before the alert went out and 67 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1186 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
425
WUUS51 KPHI 051416
SVRPHI
DEC003-NJC001-005-007-011-015-033-PAC017-045-091-101-051500-
/O.NEW.KPHI.SV.W.0012.110405T1416Z-110405T1500Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1016 AM EDT TUE APR 5 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF WILMINGTON...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
EASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
NORTHWESTERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF CAMDEN...
NORTHERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF VINELAND...
GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 1100 AM EDT
* AT 1012 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM CONSHOHOCKEN TO ARDEN TO DELAWARE CITY...OR ALONG A LINE
EXTENDING FROM 12 MILES WEST OF PHILADELPHIA TO WILMINGTON TO 10
MILES SOUTH OF WILMINGTON...AND MOVING EAST AT 35 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BRYN
MAWR...CHESTER...SWARTHMORE...DREXEL HILL...AMBLER...NARBERTH...
BECKETT...CHESTNUT HILL...SALEM...MORRIS PARK...EAST LANSDOWNE...
FOLCROFT...YEADON...ROXBOROUGH...PHILADELPHIA INTERNATIONAL
AIRPORT...GIBBSTOWN...SWEDESBORO...GERMANTOWN...PAULSBORO...SOUTH
PHILADELPHIA...JENKINTOWN...WILLOW GROVE...ABINGTON...WOODSTOWN...
WEST DEPTFORD...CENTER CITY...ALLOWAY...ROCKLEDGE...NATIONAL
PARK...KENSINGTON...BRYN ATHYN...MULLICA HILL...WOODBURY...
DEPTFORD...WOODBURY HEIGHTS...WESTVILLE...GLOUCESTER CITY...
WISSINOMING...TACONY...NORTHEAST PHILADELPHIA...HOLMESBURG...
FEASTERVILLE...BELLMAWR...PALMYRA...PITMAN...ANDALUSIA...
BENSALEM...GLASSBORO...SEABROOK FARMS...RIVERSIDE...MAGNOLIA...
ELMER...TURNERSVILLE...CHERRY HILL...BEVERLY...OLIVET...CLAYTON...
SPRINGDALE...GREENTREE...LINDENWOLD...WILLINGBORO...MOUNT LAUREL...
VOORHEES...FRANKLINVILLE...BRISTOL...MARLTON...ROSENHAYN...
BURLINGTON...TULLYTOWN...SICKLERVILLE...BERLIN...WILLIAMSTOWN...
MALAGA...MONROE TOWNSHIP...FLORENCE...SOUTH VINELAND...MARLTON
LAKES...LUMBERTON...JOBSTOWN...JACKSONVILLE...ATCO...VICTORY
LAKES...NEWFIELD...MOUNT HOLLY...MEDFORD...CHESILHURST AND BUENA
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS SEVERE THUNDERSTORM MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT
WAIT FOR THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3968 7480 3941 7499 3953 7554 3958 7554
3958 7556 3954 7556 3955 7563 3960 7560
3960 7558 3963 7557 3968 7551 3969 7552
3965 7557 4017 7530 4014 7465
TIME...MOT...LOC 1415Z 281DEG 30KT 4007 7532 3978 7543
3958 7557
$$
DRAG1 follow-up statement
802
WWUS51 KPHI 051430
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1030 AM EDT TUE APR 5 2011
DEC003-PAC017-045-091-051438-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-110405T1500Z/
DELAWARE PA-MONTGOMERY PA-BUCKS PA-NEW CASTLE DE-
1030 AM EDT TUE APR 5 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE...
SOUTHEASTERN BUCKS...SOUTHEASTERN MONTGOMERY AND EASTERN DELAWARE
COUNTIES IS CANCELLED...
LAT...LON 3956 7548 3987 7522 4002 7517 4002 7511
4009 7500 4003 7500 4003 7469 3968 7480
3941 7499
TIME...MOT...LOC 1428Z 281DEG 30KT 4005 7518 3975 7529
3956 7543
$$
NJC001-005-007-011-015-033-PAC101-051500-
/O.CON.KPHI.SV.W.0012.000000T0000Z-110405T1500Z/
SALEM NJ-CUMBERLAND NJ-CAMDEN NJ-GLOUCESTER NJ-PHILADELPHIA PA-
ATLANTIC NJ-BURLINGTON NJ-
1030 AM EDT TUE APR 5 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM EDT
FOR WEST CENTRAL BURLINGTON...NORTHWESTERN ATLANTIC...SOUTHEASTERN
PHILADELPHIA...GLOUCESTER...CAMDEN...NORTH CENTRAL CUMBERLAND AND
SALEM COUNTIES...
AT 1028 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING
DAMAGING WINDS OF AROUND 60 MPH. THESE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM NORTHWEST PHILADELPHIA TO SWEDESBORO TO
SALEM...MOVING EAST AT 35 MPH.
LAT...LON 3956 7548 3987 7522 4002 7517 4002 7511
4009 7500 4003 7500 4003 7469 3968 7480
3941 7499
TIME...MOT...LOC 1428Z 281DEG 30KT 4005 7518 3975 7529
3956 7543
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 4:03 AM EDT | Special Weather Statement | PHI | Berks | 57 min |
| Apr 5, 5:01 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 74 min |
| Apr 5, 5:23 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more | 67 min |
| Apr 5, 5:58 AM EDT | Special Weather Statement | PHI | Monroe, Northampton | 62 min |
| Apr 5, 6:05 AM EDT | Special Weather Statement | PHI | Philadelphia | 55 min |
| Apr 5, 6:30 AM EDT | Special Weather Statement | PHI | Philadelphia | 60 min |
| Apr 5, 8:55 AM EDT | Special Weather Statement | PHI | Bucks, Chester, Delaware, Lehigh, Montgomery, Northampton | 65 min |
| Apr 5, 9:37 AM EDT | Special Weather Statement | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Apr 5, 6:42 AM EDT | Special Weather Statement | PHI | Cape May, Cumberland | 63 min |
| Apr 5, 7:05 AM EDT | Special Weather Statement | PHI | Morris | 55 min |
| Apr 5, 7:07 AM EDT | Special Weather Statement | PHI | Burlington, Middlesex, Monmouth, Ocean | 53 min |
| Apr 5, 10:20 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 40 min |
| Apr 5, 10:30 AM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth, Morris, Somerset | 60 min |
| Apr 5, 10:35 AM EDT | Special Marine Warning | PHI | 55 min | |
| Apr 5, 10:41 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Salem | 19 min |
| Apr 5, 10:58 AM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Middlesex and 2 more | 92 min |
| Apr 5, 11:00 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Monmouth, Ocean | 30 min |
| Apr 5, 11:09 AM EDT | Special Marine Warning | PHI | 96 min | |
| Apr 5, 11:45 AM EDT | Special Marine Warning | PHI | 60 min | |
| Apr 5, 2:57 PM EDT | Small Craft Advisory | PHI | 27 hr | |
| Apr 5, 5:28 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 62 min |
| Apr 5, 3:05 PM EDT | Frost Advisory | PHI | Kent, Sussex | 13 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2011Severe Thunderstorm Warnings in Pennsylvania, 2011Severe Thunderstorm Warnings in Delaware, 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.