Alert archive / Pennsylvania / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

July 3, 2018Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 3, 2018, 5:30 PM EDT for Philadelphia County, Pennsylvania. It was in force for 30 min. 2 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
Jul 3, 2018, 5:30 PM EDT (21:30 UTC)
Expired
Jul 3, 2018, 6:00 PM EDT
In force
30 min
Issued by
NWS Philadelphia/Mount Holly

County Philadelphia County, PA

What was reported inside it

TimeReportWhereRemark
Jul 3, 5:40 PM EDTTSTM WND DMGSpruce Hill, PAREPORT OF TREE DOWN BLOCKING LARCHWOOD AVENUE. TIME ESTIMATED FROM RADAR. CORRECTED TIME
Jul 3, 5:40 PM EDTTSTM WND DMGSpruce Hill, PAREPORT OF TREE DOWN BLOCKING S 44TH STREET. TIME ESTIMATED FROM RADAR. CORRECTED TIME

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.5 hours before the alert went out and 219 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, Washington/Dulle, VA at 12:00Z on 2018-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 574 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2018-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
574 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1257 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

621 
WWUS81 KPHI 032130
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
530 PM EDT TUE JUL 3 2018

NJZ018-PAZ070-071-104-032200-
Camden-Eastern Montgomery-Delaware-Philadelphia-
530 PM EDT TUE JUL 3 2018

...A STRONG THUNDERSTORM WILL AFFECT WESTERN CAMDEN...SOUTHEASTERN
MONTGOMERY...SOUTHWESTERN PHILADELPHIA AND NORTHEASTERN DELAWARE
COUNTIES...

At 530 PM EDT, a strong thunderstorm was located over Morris Park, or
near Philadelphia, moving south at 5 mph.

Winds up to 40 mph are possible with this storm.

Locations impacted include...
Philadelphia, Camden, Gloucester City, Yeadon, Folcroft, Swarthmore,
Narberth, National Park, East Lansdowne, Darby Township, Morris Park,
Germantown, Center City, Bryn Mawr, Trout Lake, South Philadelphia,
Ben Franklin Bridge, Broomall, Kensington and Roxborough.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4006 7513 3993 7510 3988 7515 3988 7519
      3987 7520 3991 7535 4004 7537
TIME...MOT...LOC 2130Z 353DEG 6KT 3999 7524 

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 2:33 PM EDTSpecial Weather StatementPHIUnion27 min
Jul 3, 2:57 PM EDTSpecial Weather StatementPHIMorris63 min
Jul 3, 3:19 PM EDTFlash Flood WarningPHIMorris3 hr
Jul 3, 3:28 PM EDTSpecial Weather StatementPHISalem62 min
Jul 3, 3:30 PM EDTSpecial Weather StatementPHIBurlington60 min
Jul 3, 3:43 PM EDTFlash Flood WarningPHIMorris2 hr
Jul 3, 4:49 PM EDTSpecial Weather StatementPHISomerset56 min
Jul 3, 4:52 PM EDTSpecial Weather StatementPHIMercer53 min
Jul 3, 4:57 PM EDTFlash Flood WarningPHIHunterdon, Somerset114 min
Jul 3, 5:24 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester4 hr
Jul 3, 5:29 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset4 hr
Jul 3, 5:45 PM EDTFlash Flood WarningPHICamden, Gloucester4 hr
Jul 3, 5:47 PM EDTFlash Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset2 hr
Jul 3, 5:57 PM EDTSpecial Weather StatementPHIGloucester33 min
Jul 3, 6:03 PM EDTSpecial Weather StatementPHISussex57 min
Jul 3, 6:11 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester49 min
Jul 3, 6:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden50 min
Jul 3, 6:37 PM EDTFlash Flood WarningPHIBurlington, Camden3 hr
Jul 3, 6:46 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester44 min
Jul 3, 6:58 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester49 min
Jul 3, 7:03 PM EDTSpecial Weather StatementPHIWarren57 min
Jul 3, 2:15 PM EDTSpecial Weather StatementPHIDelaware30 min
Jul 3, 3:00 PM EDTSpecial Weather StatementPHIPhiladelphia60 min
Jul 3, 3:11 PM EDTFlash Flood WarningPHIMontgomery, Philadelphia50 min
Jul 3, 4:06 PM EDTSpecial Weather StatementPHIMontgomery54 min
Jul 3, 4:30 PM EDTSpecial Weather StatementPHIBucks60 min
Jul 3, 6:15 PM EDTSpecial Weather StatementPHIChester60 min
Jul 3, 6:18 PM EDTSevere Thunderstorm WarningPHIDelaware, Philadelphia42 min
Jul 3, 6:21 PM EDTSpecial Weather StatementPHIDelaware24 min
Jul 3, 6:40 PM EDTAreal Flood AdvisoryPHIChester, Delaware4 hr
Jul 3, 6:50 PM EDTSpecial Weather StatementPHIDelaware55 min
Jul 3, 6:54 PM EDTSevere Thunderstorm WarningPHIChester, Delaware51 min
Jul 3, 6:58 PM EDTFlash Flood WarningPHIChester, Delaware4 hr
Jul 3, 7:06 PM EDTFlash Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia2 hr
Jul 3, 7:22 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery, Philadelphia21 min
Jul 3, 7:35 PM EDTSpecial Weather StatementPHIChester25 min
Jul 3, 7:39 PM EDTSevere Thunderstorm WarningPHIChester51 min
Jul 3, 7:54 PM EDTFlash Flood WarningPHIChester4 hr

Nearby

Special Weather Statements in Pennsylvania, 2018Every special weather statement in 2018

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.