Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 209, NWS Philadelphia/Mount Holly

July 6, 2019Bucks County, Pennsylvania; Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2019, 5:25 PM EDT for Bucks County, Pennsylvania; Mercer County, New Jersey. It was in force for 50 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 6, 2019, 5:25 PM EDT (21:25 UTC)
Expired: Jul 6, 2019, 6:15 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 21:26 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
Jul 6, 5:25 PM EDT	TSTM WND DMG	Buckingham Twp, PA	MULTIPLE TREES DOWN AT INTERSECTION OF RT 202 AND 413. TIME ESTIMATED FROM RADAR.
Jul 6, 5:45 PM EDT	TSTM WND DMG	1 Sse Washington Crossi, NJ	TREE DOWN ON NJ 29 NORTHBOUND NEAR RIVER KNOLL DR. IN HOPEWELL TWP. ALL LANES CLOSED. 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, 9.4 hours before the alert went out and 185 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

936 
WUUS51 KPHI 062125
SVRPHI
NJC021-PAC017-062215-
/O.NEW.KPHI.SV.W.0209.190706T2125Z-190706T2215Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Mercer County in central New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 615 PM EDT.

* At 524 PM EDT, a severe thunderstorm was located near New Hope, or
  15 miles west of Trenton, moving southeast at 10 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...
  Trenton, Ewing, Doylestown, Pennington, New Hope, Yardley, Newtown,
  Langhorne, Richboro, Washington Crossing, Langhorn, Woodside,
  Levittown, Lawrenceville, Penndel, Langhorne Manor, Hulmeville,
  Churchville, Woodbourne and Village Shires.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4012 7488 4028 7517 4041 7508 4038 7496
      4034 7494 4035 7485 4035 7484 4032 7472
TIME...MOT...LOC 2124Z 294DEG 10KT 4031 7503 

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

Fitzsimmons

1 follow-up statement

257 
WWUS51 KPHI 062158
SVSPHI

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

NJC021-PAC017-062215-
/O.CON.KPHI.SV.W.0209.000000T0000Z-190706T2215Z/
Mercer NJ-Bucks PA-
558 PM EDT Sat Jul 6 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR WEST CENTRAL MERCER AND SOUTHEASTERN BUCKS COUNTIES...

At 557 PM EDT, a severe thunderstorm was located near Richboro, or 13
miles west of Trenton, moving southeast at 10 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Trenton, Ewing, Pennington, New Hope, Yardley, Newtown, Langhorne,
Richboro, Washington Crossing, Langhorn, Woodside, Levittown,
Lawrenceville, Penndel, Langhorne Manor, Hulmeville, Churchville,
Woodbourne, Village Shires and Newtown Grant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4026 7513 4039 7503 4037 7496 4034 7494
      4035 7485 4032 7472 4012 7488
TIME...MOT...LOC 2157Z 300DEG 6KT 4029 7499 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	47 min
Jul 6, 3:55 PM EDT	Tornado Warning	PHI	Delaware, Philadelphia	50 min
Jul 6, 4:28 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	21 min
Jul 6, 4:41 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	49 min
Jul 6, 4:45 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 hr
Jul 6, 4:54 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	4 hr
Jul 6, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	17 min
Jul 6, 5:36 PM EDT	Tornado Warning	PHI	Bucks	24 min
Jul 6, 5:44 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jul 6, 5:49 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery	4 hr
Jul 6, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	15 min
Jul 6, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	38 min
Jul 6, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Philadelphia	30 min
Jul 6, 6:49 PM EDT	Flash Flood Warning	PHI	Monroe, Northampton	3 hr
Jul 6, 6:53 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more	67 min
Jul 6, 7:45 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	45 min
Jul 6, 1:28 PM EDT	Areal Flood Advisory	PHI	Ocean	3 hr
Jul 6, 1:46 PM EDT	Flash Flood Warning	PHI	Ocean	4 hr
Jul 6, 1:52 PM EDT	Special Marine Warning	PHI		53 min
Jul 6, 2:05 PM EDT	Special Weather Statement	PHI	Burlington	25 min
Jul 6, 2:06 PM EDT	Special Weather Statement	PHI	Monmouth	24 min
Jul 6, 2:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 6, 2:10 PM EDT	Special Weather Statement	PHI	Ocean	35 min
Jul 6, 2:13 PM EDT	Special Weather Statement	PHI	Cumberland	47 min
Jul 6, 2:17 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	2 hr
Jul 6, 2:22 PM EDT	Special Marine Warning	PHI		53 min
Jul 6, 2:25 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Ocean	28 min
Jul 6, 2:26 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	34 min
Jul 6, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Ocean	47 min
Jul 6, 2:29 PM EDT	Special Marine Warning	PHI		61 min
Jul 6, 2:40 PM EDT	Special Marine Warning	PHI		31 min
Jul 6, 2:58 PM EDT	Special Marine Warning	PHI		62 min
Jul 6, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Ocean	26 min
Jul 6, 3:22 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Ocean	37 min
Jul 6, 4:08 PM EDT	Tornado Warning	PHI	Hunterdon	25 min
Jul 6, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	32 min
Jul 6, 4:49 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 6, 5:32 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
Jul 6, 7:33 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	42 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019 Severe Thunderstorm Warnings in New Jersey, 2019 Every 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.