Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 122, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 18, 2013, 2:28 AM EST for 5 counties in Pennsylvania; New Castle County, Delaware; Cecil County, Maryland. It was in force for 62 min. 4 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
- Nov 18, 2013, 2:28 AM EST (07:28 UTC)
- Expired
- Nov 18, 2013, 3:30 AM EST
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 07:30 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 |
|---|---|---|---|
| Nov 18, 2:35 AM EST | TSTM WND GST 52 | Reading Airport, PA | |
| Nov 18, 3:09 AM EST | TSTM WND DMG | Newark, DE | WIRES REPORTED DOWN. |
| Nov 18, 3:25 AM EST | TSTM WND DMG | Upper Merion Twp, PA | TREE REPORTED DOWN. |
| Nov 18, 3:29 AM EST | TSTM WND DMG | Norristown, PA | POWER LINES REPORTED DOWN ON PINE STREET IN NORRISTOWN |
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 |
|---|---|---|---|
| Nov 18, 1:07 AM EST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.5 hours before the alert went out and 184 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
- 697 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 308 m²/s²
- 0-3 km storm-relative helicity
- 340 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
353
WUUS51 KPHI 180728
SVRPHI
DEC003-MDC015-PAC011-017-029-045-091-180830-
/O.NEW.KPHI.SV.W.0122.131118T0728Z-131118T0830Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
228 AM EST MON NOV 18 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
WESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 330 AM EST
* AT 226 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
LEESPORT TO LEOLA TO WHITEFORD...MOVING EAST AT 70 MPH. THESE
STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
HONEY BROOK AND NEW MORGAN AROUND 235 AM EST...
PARKESBURG AND OXFORD AROUND 240 AM EST...
GILBERTSVILLE AND EAST GREENVILLE AROUND 245 AM EST...
SCHWENKSVILLE AND WEST GROVE AROUND 250 AM EST...
NEWARK AND PHOENIXVILLE AROUND 255 AM EST...
WILMINGTON MANOR AND TALLEYVILLE AROUND 300 AM EST...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EST MONDAY
MORNING FOR NORTHWEST NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3973 7614 3979 7605 3988 7599 3997 7600
4004 7594 4011 7595 4014 7589 4029 7613
4047 7602 4046 7555 4042 7548 4046 7544
4045 7507 4041 7504 4009 7522 3968 7554
3966 7617 3969 7621 3972 7622
TIME...MOT...LOC 0727Z 269DEG 61KT 4044 7590 4005 7616
3973 7633
$$
FORECASTER: HEAVENER2 follow-up statements
154
WWUS51 KPHI 180804
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
304 AM EST MON NOV 18 2013
DEC003-MDC015-PAC011-017-029-045-091-180830-
/O.CON.KPHI.SV.W.0122.000000T0000Z-131118T0830Z/
BERKS PA-BUCKS PA-MONTGOMERY PA-DELAWARE PA-NEW CASTLE DE-CECIL MD-
CHESTER PA-
304 AM EST MON NOV 18 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EST
FOR CHESTER...NORTHERN CECIL...NORTHERN NEW CASTLE...DELAWARE...
MONTGOMERY...WESTERN BUCKS AND SOUTHERN BERKS COUNTIES...
AT 301 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM TRUMBAUERSVILLE TO CHESTER SPRINGS TO GLEN WESTOVER...
MOVING EAST AT 70 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
WILMINGTON MANOR AND TALLEYVILLE AROUND 310 AM EST...
TINICUM AND TINICUM TOWNSHIP AROUND 315 AM EST...
MAPLE GLEN AND FORT WASHINGTON AROUND 320 AM EST...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM EST MONDAY
MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
&&
LAT...LON 3973 7614 3979 7605 3988 7599 3997 7600
4004 7594 4011 7595 4014 7589 4029 7613
4047 7602 4046 7555 4042 7548 4046 7544
4045 7507 4041 7504 4009 7522 3968 7554
3966 7617 3969 7621 3972 7622
TIME...MOT...LOC 0804Z 269DEG 61KT 4044 7533 4008 7555
3971 7574
$$
KLINE355
WWUS51 KPHI 180817
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
317 AM EST MON NOV 18 2013
MDC015-PAC011-180826-
/O.CAN.KPHI.SV.W.0122.000000T0000Z-131118T0830Z/
BERKS PA-CECIL MD-
317 AM EST MON NOV 18 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CECIL AND SOUTHERN
BERKS COUNTIES IS CANCELLED...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM EST MONDAY
MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 AM EST MONDAY MORNING FOR NORTHEAST NEW JERSEY.
LAT...LON 4013 7549 4046 7528 4045 7507 4040 7504
4009 7522 4006 7526 4003 7526 3971 7551
3968 7554 3968 7574
TIME...MOT...LOC 0816Z 269DEG 61KT 4043 7519 4013 7538
3969 7562
$$
DEC003-PAC017-029-045-091-180830-
/O.CON.KPHI.SV.W.0122.000000T0000Z-131118T0830Z/
BUCKS PA-MONTGOMERY PA-DELAWARE PA-NEW CASTLE DE-CHESTER PA-
317 AM EST MON NOV 18 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EST
FOR EAST CENTRAL CHESTER...NORTHERN NEW CASTLE...DELAWARE...CENTRAL
MONTGOMERY AND WESTERN BUCKS COUNTIES...
AT 315 AM EST...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM BEDMINSTER TO TROOPER TO
STANTON...MOVING EAST AT 70 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
MAPLE GLEN AND FORT WASHINGTON AROUND 325 AM EST...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM EST MONDAY
MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
&&
LAT...LON 4013 7549 4046 7528 4045 7507 4040 7504
4009 7522 4006 7526 4003 7526 3971 7551
3968 7554 3968 7574
TIME...MOT...LOC 0816Z 269DEG 61KT 4043 7519 4013 7538
3969 7562
$$
KLINEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 18, 1:58 AM EST | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 62 min |
| Nov 18, 2:54 AM EST | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 66 min |
| Nov 18, 3:29 AM EST | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 61 min |
| Nov 18, 2:46 AM EST | Severe Thunderstorm Warning | PHI | Kent, New Castle | 59 min |
| Nov 18, 3:39 AM EST | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 66 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2013Severe Thunderstorm Warnings in Delaware, 2013Severe Thunderstorm Warnings in Maryland, 2013Every severe thunderstorm warning in 2013
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.