Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 212, NWS Philadelphia/Mount Holly

July 6, 2019Bucks County, Montgomery County, Philadelphia County, Pennsylvania; Burlington County, Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2019, 6:13 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania; Burlington County, Mercer County, New Jersey. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2019, 6:13 PM EDT (22:13 UTC)
Expired
Jul 6, 2019, 6:28 PM EDT
In force
15 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 22:12 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.2 hours before the alert went out and 194 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 2019-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1195 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 2019-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
1195 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
542 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

704 
WUUS51 KPHI 062213
SVRPHI
NJC005-021-PAC017-091-101-062300-
/O.NEW.KPHI.SV.W.0212.190706T2213Z-190706T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
613 PM EDT Sat Jul 6 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Eastern Montgomery County in southeastern Pennsylvania...
  Southeastern Bucks County in southeastern Pennsylvania...
  Northeastern Philadelphia County in southeastern Pennsylvania...

* Until 700 PM EDT.

* At 612 PM EDT, a severe thunderstorm was located over Langhorne, or
  9 miles west of Trenton, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Philadelphia, Trenton, Bensalem, Ewing, Willingboro, Florence,
  Burlington, Bristol, Riverside, Hatboro, Bordentown, Beverly,
  Yardley, Newtown, Tullytown, Langhorne, Bryn Athyn, Ivyland,
  Feasterville-Trevose and Florence-Roebling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4019 7517 4035 7501 4016 7461 3994 7485
TIME...MOT...LOC 2212Z 305DEG 12KT 4020 7494 

HAIL...0.75IN
WIND...60MPH
 
$$

Fitzsimmons
1 follow-up statement
875 
WWUS51 KPHI 062228
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
628 PM EDT Sat Jul 6 2019

NJC005-021-PAC017-091-101-062238-
/O.CAN.KPHI.SV.W.0212.000000T0000Z-190706T2300Z/
Mercer NJ-Burlington NJ-Montgomery PA-Bucks PA-Philadelphia PA-
628 PM EDT Sat Jul 6 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MERCER...
NORTHWESTERN BURLINGTON...EASTERN MONTGOMERY...SOUTHEASTERN BUCKS AND
NORTHEASTERN PHILADELPHIA COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 4019 7517 4035 7501 4016 7461 3994 7485
TIME...MOT...LOC 2225Z 305DEG 12KT 4017 7489 

$$

Fitzsimmons

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 3:43 PM EDTSevere Thunderstorm WarningPHINorthampton47 min
Jul 6, 3:55 PM EDTTornado WarningPHIDelaware, Philadelphia50 min
Jul 6, 4:28 PM EDTSevere Thunderstorm WarningPHIBucks21 min
Jul 6, 4:41 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton49 min
Jul 6, 4:45 PM EDTAreal Flood AdvisoryPHIBucks, Delaware, Montgomery, Philadelphia4 hr
Jul 6, 4:54 PM EDTAreal Flood AdvisoryPHIBucks, Chester, Montgomery4 hr
Jul 6, 5:04 PM EDTSevere Thunderstorm WarningPHIDelaware17 min
Jul 6, 5:25 PM EDTSevere Thunderstorm WarningPHIBucks50 min
Jul 6, 5:36 PM EDTTornado WarningPHIBucks24 min
Jul 6, 5:44 PM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton4 hr
Jul 6, 5:49 PM EDTAreal Flood AdvisoryPHIChester, Delaware, Montgomery4 hr
Jul 6, 6:22 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton38 min
Jul 6, 6:42 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Philadelphia30 min
Jul 6, 6:49 PM EDTFlash Flood WarningPHIMonroe, Northampton3 hr
Jul 6, 6:53 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more67 min
Jul 6, 7:45 PM EDTSpecial Weather StatementPHIBucks, Chester, Delaware, Montgomery, Philadelphia45 min
Jul 6, 1:28 PM EDTAreal Flood AdvisoryPHIOcean3 hr
Jul 6, 1:46 PM EDTFlash Flood WarningPHIOcean4 hr
Jul 6, 1:52 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:05 PM EDTSpecial Weather StatementPHIBurlington25 min
Jul 6, 2:06 PM EDTSpecial Weather StatementPHIMonmouth24 min
Jul 6, 2:07 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:10 PM EDTSpecial Weather StatementPHIOcean35 min
Jul 6, 2:13 PM EDTSpecial Weather StatementPHICumberland47 min
Jul 6, 2:17 PM EDTAreal Flood AdvisoryPHIBurlington, Camden2 hr
Jul 6, 2:22 PM EDTSpecial Marine WarningPHI53 min
Jul 6, 2:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Ocean28 min
Jul 6, 2:26 PM EDTSevere Thunderstorm WarningPHIMonmouth34 min
Jul 6, 2:28 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean47 min
Jul 6, 2:29 PM EDTSpecial Marine WarningPHI61 min
Jul 6, 2:40 PM EDTSpecial Marine WarningPHI31 min
Jul 6, 2:58 PM EDTSpecial Marine WarningPHI62 min
Jul 6, 3:04 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Ocean26 min
Jul 6, 3:22 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean37 min
Jul 6, 4:08 PM EDTTornado WarningPHIHunterdon25 min
Jul 6, 4:39 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem32 min
Jul 6, 4:49 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Sussex, Warren4 hr
Jul 6, 5:32 PM EDTFlash Flood WarningPHIWarren4 hr
Jul 6, 7:33 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem42 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019Severe Thunderstorm Warnings in New Jersey, 2019Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.