Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 117, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 1, 2013, 8:37 AM EDT for 5 counties in Pennsylvania; 6 counties in New Jersey; New Castle County, Delaware. It was in force for 68 min. 12 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 1, 2013, 8:37 AM EDT (12:37 UTC)
- Expired
- Nov 1, 2013, 9:45 AM EDT
- In force
- 68 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Hunterdon County, NJ, Mercer County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 12:39 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 1, 8:45 AM EDT | TSTM WND GST 52 | Spring Mount, PA | |
| Nov 1, 8:50 AM EDT | TSTM WND GST 47 | Stewartsville, NJ | |
| Nov 1, 8:55 AM EDT | TSTM WND DMG | Eagleville, PA | TREE DOWN |
| Nov 1, 9:05 AM EDT | TSTM WND DMG | East Whiteland Twp, PA | TREE FELL ONTO A ROOFTOP |
| Nov 1, 9:12 AM EDT | TSTM WND DMG | Oxford, NJ | BRIEF POWER OUTAGES ACROSS WARREN COUNTY |
| Nov 1, 9:15 AM EDT | TSTM WND DMG | Haverford Twp, PA | A FEW FEW LARGE TREE LIMBS DOWN. |
| Nov 1, 9:15 AM EDT | TSTM WND DMG | Pittstown, NJ | TREES DOWN |
| Nov 1, 9:20 AM EDT | TSTM WND DMG | Bedminster, NJ | TREES DOWN. |
| Nov 1, 9:20 AM EDT | TSTM WND DMG | Boonton, NJ | TREES AND WIRES DOWN THROUGHOUT THE COUNTY. |
| Nov 1, 9:25 AM EDT | TSTM WND DMG | Greenville, DE | WIRES DOWN. |
| Nov 1, 9:32 AM EDT | TSTM WND GST 48 | Philadelphia Intl Airpo, PA | |
| Nov 1, 9:52 AM EDT | TSTM WND DMG | Oxford, NJ | BRIEF POWER OUTAGES ACROSS WARREN COUNTY |
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 1, 6:25 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 0.6 hours before the alert went out and 162 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
- 908 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 334 m²/s²
- 0-3 km storm-relative helicity
- 380 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
882
WUUS51 KPHI 011237
SVRPHI
DEC003-NJC019-021-027-035-037-041-PAC017-029-045-091-101-011345-
/O.NEW.KPHI.SV.W.0117.131101T1237Z-131101T1345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
837 AM EDT FRI NOV 1 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WARREN COUNTY IN NORTHWEST NEW JERSEY...
HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
WESTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
MORRIS COUNTY IN NORTHERN NEW JERSEY...
SOMERSET COUNTY IN NORTHERN NEW JERSEY...
SOUTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 945 AM EDT
* AT 832 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS. THIS LINE
EXTENDED FROM HIDDEN LAKE TO LEHIGH UNIVERSITY TO GREEN LANE TO
HONEY BROOK TO GLEN ROY...MOVING EAST AT 50 MPH. THIS LINE IS
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
THERE IS LITTLE TO NO LIGHTNING BEING DETECTED WITH THIS LINE,
HOWEVER VERY STRONG WINDS JUST ABOVE THE SURFACE CAN MIX DOWN WITH
THE LINE AS IT MOVES THROUGH RESULTING IN WIND DAMAGE.
* LOCATIONS IMPACTED INCLUDE...
FIVE POINTS...
WEST GROVE...
KENNETT SQUARE...
FRANKLIN...
HAMBURG...
CONCORDVILLE...
BRYN MAWR...
WILLOW GROVE...
GERMANTOWN...
WOODSIDE...
MILLSTONE...
LEVITTOWN...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS LINE MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT WAIT TO HEAR
THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
FRIDAY MORNING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4118 7439 4109 7450 4104 7450 4105 7445
4102 7443 4100 7430 4091 7427 4090 7433
4076 7436 4058 7452 4019 7475 3984 7528
3984 7535 3971 7550 3972 7608 4061 7520
4106 7502 4109 7497 4109 7499
TIME...MOT...LOC 1235Z 263DEG 42KT 4107 7493 4062 7531
4032 7543 4006 7577 3974 7601
$$
FORECASTER: GORSE2 follow-up statements
525
WWUS51 KPHI 011301
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
901 AM EDT FRI NOV 1 2013
DEC003-NJC019-021-027-035-037-041-PAC017-029-045-091-101-011345-
/O.CON.KPHI.SV.W.0117.000000T0000Z-131101T1345Z/
WARREN NJ-HUNTERDON NJ-MERCER NJ-MORRIS NJ-SOMERSET NJ-SUSSEX NJ-
BUCKS PA-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-NEW CASTLE DE-
CHESTER PA-
901 AM EDT FRI NOV 1 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EDT
FOR EASTERN CHESTER...NORTHERN NEW CASTLE...DELAWARE...
PHILADELPHIA...MONTGOMERY...BUCKS...SOUTHERN SUSSEX...SOMERSET...
MORRIS...WESTERN MERCER...HUNTERDON AND EASTERN WARREN COUNTIES...
AT 858 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
TRACK A LINE OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS PRODUCING
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS LINE EXTENDED FROM FRANKLIN
TO BLOOMSBURY TO ROBESONIA TO VALLEY FORGE TO KEMBLESVILLE...MOVING
EAST AT 50 MPH.
THERE IS LITTLE TO NO LIGHTNING BEING DETECTED WITH THIS LINE,
HOWEVER VERY STRONG WINDS JUST ABOVE THE SURFACE ARE MIXING DOWN
WITH THE LINE AS IT MOVES THROUGH RESULTING IN AREAS OF WIND DAMAGE.
LOCATIONS IMPACTED INCLUDE...
KING OF PRUSSIA...
CONCORDVILLE...
EDGEMOOR...
WILLOW GROVE...
EAST LANSDOWNE...
WOODSIDE...
HOLMESBURG...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS LINE HAS A HISTORY OF PRODUCING DAMAGING WINDS. SEEK SHELTER
NOW INSIDE A STURDY STRUCTURE, AND STAY AWAY FROM WINDOWS.
THIS LINE MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT WAIT TO HEAR
THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
FRIDAY MORNING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4118 7439 4109 7450 4104 7450 4100 7430
4091 7427 4090 7433 4076 7436 4058 7452
4019 7475 3985 7526 3984 7536 3971 7550
3972 7599 4060 7515 4109 7490
TIME...MOT...LOC 1258Z 263DEG 42KT 4110 7460 4065 7498
4035 7510 4009 7544 3974 7580
$$
FORECASTER: GORSE327
WWUS51 KPHI 011344
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
944 AM EDT FRI NOV 1 2013
DEC003-NJC019-021-027-035-037-041-PAC017-029-045-091-101-011353-
/O.EXP.KPHI.SV.W.0117.000000T0000Z-131101T1345Z/
WARREN NJ-HUNTERDON NJ-MERCER NJ-MORRIS NJ-SOMERSET NJ-SUSSEX NJ-
BUCKS PA-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-NEW CASTLE DE-
CHESTER PA-
944 AM EDT FRI NOV 1 2013
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHESTER...NORTHERN NEW
CASTLE...DELAWARE...PHILADELPHIA...MONTGOMERY...BUCKS...SOUTHERN
SUSSEX...SOMERSET...MORRIS...WESTERN MERCER...HUNTERDON AND EASTERN
WARREN COUNTIES WILL EXPIRE AT 945 AM EDT...
THE LINE OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS WITH STRONG TO
DAMAGING WINDS IS EXITING THE AREA, THEREFORE THE SEVERE
THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL NOON EDT FRIDAY
FOR NEW JERSEY AND SOUTHEAST PENNSYLVANIA.
LAT...LON 4118 7439 4109 7450 4104 7450 4100 7430
4091 7427 4090 7433 4076 7436 4058 7452
4019 7475 3985 7526 3984 7536 3971 7550
3972 7599 4060 7515 4109 7490
TIME...MOT...LOC 1343Z 263DEG 42KT 4116 7391 4071 7429
4041 7442 4015 7476 3981 7512
$$
FORECASTER: GORSEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 1, 2:21 AM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 84 min |
| Nov 1, 3:14 AM EDT | Wind Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 9 hr |
| Nov 1, 6:45 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe | 75 min |
| Nov 1, 7:53 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 67 min |
| Nov 1, 9:11 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 79 min |
| Nov 1, 9:25 AM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 65 min |
| Nov 1, 10:09 AM EDT | Special Marine Warning | PHI | 81 min | |
| Nov 1, 10:29 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Cumberland, Monmouth, Ocean | 76 min |
| Nov 1, 1:40 PM EDT | Small Craft Advisory | PHI | 3 days | |
| Nov 1, 8:27 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 63 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2013Severe Thunderstorm Warnings in Pennsylvania, 2013Severe Thunderstorm Warnings in Delaware, 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.