Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 165, NWS Philadelphia/Mount Holly

June 29, 2019Bucks County, Montgomery County, Pennsylvania; Hunterdon County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2019, 3:56 PM EDT for Bucks County, Montgomery County, Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 49 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
Jun 29, 2019, 3:56 PM EDT (19:56 UTC)
Expired
Jun 29, 2019, 4:45 PM EDT
In force
49 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 19:58 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
Jun 29, 4:06 PM EDTTSTM WND DMG2 E Phillipsburg, NJDOWNED TREE ON U.S. HIGHWAY 22 NEAR MEMORIAL PARKWAY. TIME ESTIMATED FROM RADAR.
Jun 29, 4:22 PM EDTTSTM WND DMGFrenchtown, NJPHOTO OF A LARGE TREE DOWN. TIME ESTIMATED FROM RADAR.

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.

IssuedProductOfficeLasted
Jun 29, 12:08 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.9 hours before the alert went out and 189 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 2019-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1180 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 2019-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
1180 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1077 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted.

211 
WUUS51 KPHI 291956
SVRPHI
NJC019-041-PAC017-091-292045-
/O.NEW.KPHI.SV.W.0165.190629T1956Z-190629T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
356 PM EDT Sat Jun 29 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Hunterdon County in northwestern New Jersey...
  Southern Warren County in northwestern New Jersey...
  Northeastern Montgomery County in southeastern Pennsylvania...
  Northwestern Bucks County in southeastern Pennsylvania...

* Until 445 PM EDT.

* At 355 PM EDT, severe thunderstorms were located along a line
  extending from near Roxburg to near Geryville, moving southeast at
  25 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...
  Quakertown, Perkasie, Doylestown, Byram, Souderton, Bedminster,
  Washington, Chalfont, Tinicum, High Bridge, Clinton, Belvidere,
  Harmony, Oxford, Alpha, Dublin, Glen Gardner, Ferndale, Hampton and
  Frenchtown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4081 7485 4079 7489 4074 7483 4072 7473
      4019 7514 4041 7546 4049 7540 4061 7520
      4065 7520 4068 7517 4068 7520 4075 7519
      4078 7517 4077 7513 4082 7508 4085 7510
      4086 7505
TIME...MOT...LOC 1955Z 309DEG 23KT 4079 7514 4042 7542 

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

CMS
2 follow-up statements
122 
WWUS51 KPHI 292020
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
420 PM EDT Sat Jun 29 2019

NJC019-041-PAC017-091-292045-
/O.CON.KPHI.SV.W.0165.000000T0000Z-190629T2045Z/
Hunterdon NJ-Warren NJ-Montgomery PA-Bucks PA-
420 PM EDT Sat Jun 29 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR HUNTERDON...SOUTHERN WARREN...EAST CENTRAL MONTGOMERY AND CENTRAL
BUCKS COUNTIES...

At 420 PM EDT, severe thunderstorms were located along a line
extending from Hampton to Fricks, moving southeast at 25 mph.

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

SOURCE...Public. These storms produced widespread wind damage in 
         Lehigh and Northampton Counties.

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

Locations impacted include...
Perkasie, Doylestown, Byram, Souderton, Bedminster, Washington,
Chalfont, Tinicum, High Bridge, Clinton, Oxford, Alpha, Dublin, Glen
Gardner, Ferndale, Hampton, Frenchtown, Lebanon, Milford and Califon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4081 7485 4079 7489 4074 7483 4072 7473
      4019 7514 4034 7536 4061 7520 4065 7520
      4068 7517 4074 7509 4085 7502
TIME...MOT...LOC 2020Z 309DEG 23KT 4070 7499 4033 7527 

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

CMS
431 
WWUS51 KPHI 292036
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
436 PM EDT Sat Jun 29 2019

NJC019-041-PAC017-091-292045-
/O.EXP.KPHI.SV.W.0165.000000T0000Z-190629T2045Z/
Hunterdon NJ-Warren NJ-Montgomery PA-Bucks PA-
436 PM EDT Sat Jun 29 2019

...THE SEVERE THUNDERSTORM WARNING FOR HUNTERDON...SOUTHERN WARREN...
EAST CENTRAL MONTGOMERY AND CENTRAL BUCKS COUNTIES WILL EXPIRE AT 445
PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

A severe thunderstorm watch remains in effect until 700 PM EDT for
northern and northwestern New Jersey...and eastern and southeastern
Pennsylvania.

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

LAT...LON 4081 7485 4079 7489 4074 7483 4072 7473
      4019 7514 4034 7536 4061 7520 4065 7520
      4068 7517 4074 7509 4085 7502
TIME...MOT...LOC 2035Z 309DEG 23KT 4064 7490 4027 7518 

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 2:27 PM EDTSevere Thunderstorm WarningPHIBerks63 min
Jun 29, 2:46 PM EDTSpecial Weather StatementPHIChester29 min
Jun 29, 3:06 PM EDTSpecial Weather StatementPHIChester24 min
Jun 29, 3:09 PM EDTSevere Thunderstorm WarningPHIChester51 min
Jun 29, 3:20 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton55 min
Jun 29, 3:24 PM EDTSevere Thunderstorm WarningPHIDelaware36 min
Jun 29, 3:27 PM EDTSevere Thunderstorm WarningPHIChester53 min
Jun 29, 3:45 PM EDTFlash Flood WarningPHIChester3 hr
Jun 29, 3:52 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery, Philadelphia53 min
Jun 29, 3:59 PM EDTSevere Thunderstorm WarningPHIChester, Delaware46 min
Jun 29, 4:00 PM EDTFlash Flood WarningPHIChester, Delaware3 hr
Jun 29, 4:17 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh, Northampton3 hr
Jun 29, 4:28 PM EDTSevere Thunderstorm WarningPHIBucks, Delaware, Montgomery, Philadelphia47 min
Jun 29, 4:41 PM EDTAreal Flood AdvisoryPHIBucks, Delaware, Montgomery, Philadelphia3 hr
Jun 29, 7:10 PM EDTSpecial Weather StatementPHIBerks35 min
Jun 29, 7:16 PM EDTSpecial Weather StatementPHILebanon29 min
Jun 28, 8:08 PM EDTSpecial Weather StatementPHIBurlington37 min
Jun 29, 1:35 PM EDTSpecial Weather StatementPHICamden25 min
Jun 29, 1:54 PM EDTSpecial Weather StatementPHIBurlington36 min
Jun 29, 2:31 PM EDTSpecial Weather StatementPHIGloucester29 min
Jun 29, 3:09 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Gloucester37 min
Jun 29, 3:10 PM EDTSpecial Marine WarningPHI50 min
Jun 29, 3:14 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem46 min
Jun 29, 3:17 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean43 min
Jun 29, 3:18 PM EDTSpecial Marine WarningPHI57 min
Jun 29, 3:19 PM EDTSpecial Weather StatementPHIOcean26 min
Jun 29, 3:25 PM EDTSpecial Weather StatementPHIBurlington35 min
Jun 29, 3:31 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren44 min
Jun 29, 3:45 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean45 min
Jun 29, 3:55 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean50 min
Jun 29, 4:01 PM EDTFlash Flood WarningPHISussex, Warren3 hr
Jun 29, 4:05 PM EDTSpecial Marine WarningPHI55 min
Jun 29, 4:06 PM EDTSpecial Marine WarningPHI54 min
Jun 29, 4:11 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex49 min
Jun 29, 4:15 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean30 min
Jun 29, 4:16 PM EDTSpecial Marine WarningPHI18 min
Jun 29, 4:23 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean27 min
Jun 29, 4:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean50 min
Jun 29, 4:26 PM EDTSpecial Marine WarningPHI49 min
Jun 29, 4:27 PM EDTSevere Thunderstorm WarningPHIMorris, Somerset, Sussex, Warren48 min
Jun 29, 4:39 PM EDTSpecial Marine WarningPHI96 min
Jun 29, 4:44 PM EDTAreal Flood AdvisoryPHIBurlington, Ocean3 hr
Jun 29, 4:52 PM EDTSpecial Marine WarningPHI34 min
Jun 29, 4:53 PM EDTSevere Thunderstorm WarningPHIMorris22 min
Jun 29, 4:55 PM EDTSpecial Weather StatementPHIOcean35 min
Jun 29, 5:03 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset27 min
Jun 29, 5:05 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Monmouth, Ocean40 min
Jun 29, 5:08 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland67 min
Jun 29, 5:19 PM EDTSpecial Marine WarningPHI116 min
Jun 29, 5:29 PM EDTSpecial Marine WarningPHI109 min
Jun 29, 5:32 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean43 min
Jun 29, 5:43 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Cape May, Monmouth, Ocean32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.