Alert archive / New Jersey / Special Weather Statements in 2019

Special Weather Statement, NWS Philadelphia/Mount Holly

August 7, 2019Mercer County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 7, 2019, 4:03 PM EDT for Mercer County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 42 min. 9 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
Aug 7, 2019, 4:03 PM EDT (20:03 UTC)
Expired
Aug 7, 2019, 4:45 PM EDT
In force
42 min
Issued by
NWS Philadelphia/Mount Holly

Counties Mercer County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 48 km from the middle of the area, began a volume at 20:04 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

TimeReportWhereRemark
Aug 7, 4:16 PM EDTTSTM WND DMG1 Ese Roxborough, PADOWNED TREE ON KELLY DRIVE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:17 PM EDTTSTM WND DMG1 Ene Roxborough, PADOWNED TREES ON WEST RIVER DRIVE AND LINCOLN DRIVE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:23 PM EDTTSTM WND DMGPrinceton, NJREPORT OF DOWNED POWER LINES IN PRINCETON. TIME ESTIMATED FROM RADAR.
Aug 7, 4:24 PM EDTTSTM WND DMGCheltenham, PASOCIAL MEDIA VIDEO OF LARGE TREE BLOWN DOWN DAMAGING PROPERTY AT A RESIDENCE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:30 PM EDTTSTM WND DMG2 Ne Lawrenceville, NJDOWNED POWER LINES AT LAWRENCEVILLE ROAD AND PROVINCE LINE ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 4:38 PM EDTTSTM WND DMGAbington, PASEVERAL TREES AND POWER LINES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Aug 7, 4:45 PM EDTTSTM WND DMG2 Wsw Princeton, NJDOWNED TREE ON US-206 NORTHBOUND AT CR-533. ALSO SOME FLOODING ON THE ROADWAY. ALL LANES CLOSED AND DETOURED. TIME ESTIMATED FROM RADAR.
Aug 7, 4:49 PM EDTTSTM WND DMGOreland, PADOWNED POWER LINES NEAR THE ORELAND STATION. TIME ESTIMATED FROM RADAR.
Aug 7, 4:52 PM EDTTSTM WND DMG1 Se Wynnewood, PADOWNED TREE BLOCKING VIOLET LANE NEAR PERIWINKLE ROAD. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.1 hours before the alert went out and 182 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2019-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1372 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2019-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1372 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
652 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted.

211 
WWUS81 KPHI 072003
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
403 PM EDT Wed Aug 7 2019

NJZ010-012-015-PAZ070-071-104-106-072045-
Somerset-Middlesex-Mercer-Lower Bucks-Eastern
Montgomery-Delaware-Philadelphia-
403 PM EDT Wed Aug 7 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL MERCER...SOUTH
CENTRAL SOMERSET...WEST CENTRAL MIDDLESEX...SOUTHEASTERN
MONTGOMERY...SOUTHEASTERN BUCKS...PHILADELPHIA AND NORTHEASTERN
DELAWARE COUNTIES...

At 403 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Princeton to Roxborough. Movement was
east at 5 mph.

Wind gusts up to 40 mph and pea size hail are possible with these
storms.

Locations impacted include...
Philadelphia, Trenton, Camden, Bensalem, South Brunswick, Ewing,
Princeton, Palmyra, Hatboro, Jenkintown, Narberth, Pennington,
Rockledge, Yardley, Newtown, Hopewell, Abington, Langhorne, Bryn
Athyn and Ivyland.

This includes Interstate 295 in New Jersey between mile markers 65
and 76.
 
If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

A severe thunderstorm watch remains in effect until 900 PM EDT for
southern, central, northern and northwestern New Jersey...and
southeastern Pennsylvania.

LAT...LON 4040 7445 3993 7516 3999 7542 4043 7474
TIME...MOT...LOC 2003Z 266DEG 5KT 4036 7467 4001 7523 

$$

Staarmann

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 6, 8:05 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren55 min
Aug 7, 10:02 AM EDTFlash Flood WatchPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more11 hr
Aug 7, 12:55 PM EDTSpecial Weather StatementPHIHunterdon35 min
Aug 7, 1:02 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Warren4 hr
Aug 7, 1:12 PM EDTSpecial Weather StatementPHIMonmouth33 min
Aug 7, 1:22 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren38 min
Aug 7, 1:26 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer49 min
Aug 7, 1:33 PM EDTSpecial Marine WarningPHI42 min
Aug 7, 1:38 PM EDTSevere Thunderstorm WarningPHICape May52 min
Aug 7, 1:40 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Somerset50 min
Aug 7, 1:44 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean46 min
Aug 7, 1:46 PM EDTFlash Flood WarningPHIHunterdon, Morris4 hr
Aug 7, 1:50 PM EDTSpecial Marine WarningPHI55 min
Aug 7, 1:52 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset55 min
Aug 7, 2:01 PM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Middlesex, Somerset97 min
Aug 7, 2:03 PM EDTSpecial Marine WarningPHI34 min
Aug 7, 2:07 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth38 min
Aug 7, 2:16 PM EDTSpecial Weather StatementPHICape May29 min
Aug 7, 2:18 PM EDTAreal Flood AdvisoryPHIMorris, Somerset3 hr
Aug 7, 2:21 PM EDTSpecial Marine WarningPHI23 min
Aug 7, 2:23 PM EDTSevere Thunderstorm WarningPHICape May19 min
Aug 7, 2:27 PM EDTSevere Thunderstorm WarningPHISussex, Warren32 min
Aug 7, 2:30 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth45 min
Aug 7, 2:57 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Somerset3 hr
Aug 7, 3:05 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden40 min
Aug 7, 3:07 PM EDTSevere Thunderstorm WarningPHIMonmouth53 min
Aug 7, 3:18 PM EDTSevere Thunderstorm WarningPHIHunterdon42 min
Aug 7, 3:24 PM EDTSevere Thunderstorm WarningPHIWarren51 min
Aug 7, 3:38 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean67 min
Aug 7, 3:42 PM EDTSpecial Weather StatementPHIMiddlesex33 min
Aug 7, 3:49 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth3 hr
Aug 7, 3:54 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren51 min
Aug 7, 3:59 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth46 min
Aug 7, 4:03 PM EDTFlash Flood WarningPHIMiddlesex, Monmouth4 hr
Aug 7, 4:06 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Somerset4 hr
Aug 7, 4:09 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Mercer, Middlesex, Somerset66 min
Aug 7, 4:14 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Sussex, Warren46 min
Aug 7, 4:20 PM EDTFlash Flood WarningPHIMercer4 hr
Aug 7, 4:27 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem63 min
Aug 7, 4:34 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth41 min
Aug 7, 4:39 PM EDTFlash Flood WarningPHIMercer, Middlesex, Somerset6 hr
Aug 7, 5:02 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth, Morris, Somerset22 min
Aug 7, 5:03 PM EDTSpecial Marine WarningPHI42 min
Aug 7, 5:16 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Salem59 min
Aug 7, 5:34 PM EDTSpecial Marine WarningPHI56 min
Aug 7, 5:39 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Cumberland, Gloucester, Salem51 min
Aug 7, 5:41 PM EDTSevere Thunderstorm WarningPHIMonmouth49 min
Aug 7, 5:57 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 1 more78 min
Aug 7, 6:01 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Cumberland, Gloucester, Mercer, Middlesex and 3 more3 hr
Aug 7, 6:21 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more69 min
Aug 7, 6:27 PM EDTSpecial Marine WarningPHI63 min
Aug 7, 6:56 PM EDTSpecial Marine WarningPHI2 hr
Aug 7, 7:09 PM EDTSpecial Marine WarningPHI2 hr
Aug 7, 7:15 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Monmouth, Ocean75 min
Aug 7, 7:42 PM EDTAreal Flood WarningPHIMercer3 hr
Aug 7, 1:46 PM EDTSevere Thunderstorm WarningPHIBerks44 min
Aug 7, 2:59 PM EDTSpecial Weather StatementPHIBucks, Montgomery31 min
Aug 7, 3:01 PM EDTAreal Flood AdvisoryPHIBerks2 hr
Aug 7, 3:02 PM EDTSpecial Weather StatementPHIBerks, Lehigh43 min
Aug 7, 3:24 PM EDTFlash Flood WarningPHIBerks106 min
Aug 7, 3:30 PM EDTSpecial Weather StatementPHIDelaware, Montgomery30 min
Aug 7, 3:31 PM EDTSpecial Weather StatementPHIPhiladelphia44 min
Aug 7, 3:41 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh, Northampton91 min
Aug 7, 4:44 PM EDTFlash Flood WarningPHIChester, Delaware, Montgomery, Philadelphia3 hr
Aug 7, 6:10 PM EDTRiver Flood WarningPHIDelaware119 min
Aug 7, 1:46 PM EDTSpecial Weather StatementPHISussex29 min
Aug 7, 1:49 PM EDTSevere Thunderstorm WarningPHISussex41 min
Aug 7, 4:44 PM EDTSpecial Weather StatementPHINew Castle31 min
Aug 7, 4:57 PM EDTSevere Thunderstorm WarningPHIKent, New Castle63 min
Aug 7, 5:33 PM EDTSevere Thunderstorm WarningPHIKent, New Castle42 min
Aug 7, 5:53 PM EDTSevere Thunderstorm WarningPHIKent, Sussex52 min
Aug 7, 6:39 PM EDTSevere Thunderstorm WarningPHIKent, Sussex51 min
Aug 7, 7:23 PM EDTSpecial Weather StatementPHISussex37 min
Aug 7, 7:54 PM EDTSpecial Weather StatementPHISussex36 min
Aug 6, 10:29 PM EDTSpecial Weather StatementPHITalbot46 min
Aug 7, 4:07 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's53 min

Nearby

Special Weather Statements in New Jersey, 2019Special Weather Statements in Pennsylvania, 2019Every special weather statement in 2019

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.