Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly

April 15, 2023Hunterdon County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 15, 2023, 4:56 PM EDT for Hunterdon County, New Jersey; Bucks County, Pennsylvania. It was in force for 14 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: Apr 15, 2023, 4:56 PM EDT (20:56 UTC)
Expired: Apr 15, 2023, 5:10 PM EDT
In force: 14 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Hunterdon County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 20:59 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, 8.9 hours before the alert went out and 188 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: 26 J/kg
Mixed-layer CIN: -187 J/kg
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

610 
WUUS51 KPHI 152056
SVRPHI
NJC019-PAC017-152130-
/O.NEW.KPHI.SV.W.0035.230415T2056Z-230415T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
456 PM EDT Sat Apr 15 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Hunterdon County in northwestern New Jersey...
  Central Bucks County in southeastern Pennsylvania...

* Until 530 PM EDT.

* At 455 PM EDT, a severe thunderstorm was located over Doylestown,
  or 18 miles west of Trenton, moving northeast at 15 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible.

* Locations impacted include...
  Doylestown, Byram, Chalfont, Tinicum, New Hope, Frenchtown,
  Stockton, Sergeantsville, Pipersville, Erwinna, Gardenville,
  Lumberville, Sand Brook, Lambertville, New Britain and Brittany
  Farms-Highlands.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4034 7493 4034 7494 4033 7494 4021 7505
      4027 7524 4057 7507 4045 7482
TIME...MOT...LOC 2055Z 211DEG 14KT 4029 7509 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Hoeflich

1 follow-up statement

263 
WWUS51 KPHI 152110
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
510 PM EDT Sat Apr 15 2023

NJC019-PAC017-152118-
/O.CAN.KPHI.SV.W.0035.000000T0000Z-230415T2130Z/
Hunterdon NJ-Bucks PA-
510 PM EDT Sat Apr 15 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HUNTERDON AND
CENTRAL BUCKS 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.

LAT...LON 4034 7493 4034 7494 4033 7494 4021 7505
      4027 7524 4057 7507 4045 7482
TIME...MOT...LOC 2107Z 211DEG 14KT 4033 7506 

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:29 AM EDT	Marine Dense Fog Advisory	PHI		54 hr
Apr 15, 1:09 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Apr 15, 1:34 PM EDT	Severe Thunderstorm Warning	PHI	Warren	26 min
Apr 15, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	26 min
Apr 15, 1:55 PM EDT	Areal Flood Advisory	PHI	Sussex	6 hr
Apr 15, 1:58 PM EDT	Severe Thunderstorm Warning	PHI	Warren	32 min
Apr 15, 2:06 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	6 hr
Apr 15, 3:28 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
Apr 15, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	31 min
Apr 15, 3:58 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Apr 15, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	25 min
Apr 15, 4:19 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	3 hr
Apr 15, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	26 min
Apr 15, 6:05 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset	96 min
Apr 15, 6:32 PM EDT	Areal Flood Warning	PHI	Hunterdon	5 hr
Apr 15, 12:42 PM EDT	Special Weather Statement	PHI	Northampton	48 min
Apr 15, 1:03 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	27 min
Apr 15, 1:22 PM EDT	Flash Flood Warning	PHI	Lehigh, Northampton	4 hr
Apr 15, 1:51 PM EDT	Severe Thunderstorm Warning	PHI	Chester	24 min
Apr 15, 2:02 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	28 min
Apr 15, 2:17 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Apr 15, 5:20 PM EDT	Flash Flood Warning	PHI	Lehigh	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023 Severe Thunderstorm Warnings in Pennsylvania, 2023 Every severe thunderstorm warning in 2023

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.