Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 27, NWS Philadelphia/Mount Holly

April 15, 2023Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 15, 2023, 1:34 PM EDT for Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 26 min. 1 report 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: Apr 15, 2023, 1:34 PM EDT (17:34 UTC)
Expired: Apr 15, 2023, 2:00 PM EDT
In force: 26 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 17:36 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
Apr 15, 1:35 PM EDT	HAIL 0.25	Bushkill Twp, PA

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, 5.6 hours before the alert went out and 195 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.

799 
WUUS51 KPHI 151734
SVRPHI
NJC041-PAC089-095-151800-
/O.NEW.KPHI.SV.W.0027.230415T1734Z-230415T1800Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Warren County in northwestern New Jersey...
  Central Monroe County in northeastern Pennsylvania...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 200 PM EDT.

* At 133 PM EDT, a severe thunderstorm was located over Wind Gap, or
  10 miles north of Easton, moving north at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible.

* Locations impacted include...
  Mount Pocono, East Stroudsburg, Bangor, Pen Argyl, Wind Gap,
  Belfast, East Bangor, Stormville, Henryville, Brodheadsville, Werry
  Lake, Delaware Water Gap, Tannersville, Alpine Mountain, Rossland,
  Reeders, Saylorsburg, Analomink, McMichael and Scotrun.

This includes the following highways...
 Interstate 80 in Pennsylvania between mile markers 296 and 314.
 Interstate 80 in New Jersey between mile markers 0 and 4.
 Interstate 380 in Pennsylvania between mile markers 0 and 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4115 7515 4114 7513 4114 7509 4108 7503
      4108 7502 4075 7518 4077 7541 4116 7543
      4116 7515
TIME...MOT...LOC 1733Z 193DEG 33KT 4083 7527 

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

$$

MLB

1 follow-up statement

792 
WWUS51 KPHI 151759
SVSPHI

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

NJC041-PAC089-095-151808-
/O.EXP.KPHI.SV.W.0027.000000T0000Z-230415T1800Z/
Warren NJ-Monroe PA-Northampton PA-
159 PM EDT Sat Apr 15 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WARREN...CENTRAL
MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT 200 PM
EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

Remember, a Severe Thunderstorm Warning still remains in effect for
Warren, Monroe, and Northampton Counties until 2:30PM.

LAT...LON 4115 7515 4114 7513 4114 7509 4108 7503
      4108 7502 4075 7518 4077 7541 4116 7543
      4116 7515
TIME...MOT...LOC 1758Z 193DEG 33KT 4105 7520 

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 1:58 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	32 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, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	25 min
Apr 15, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	14 min
Apr 15, 5:20 PM EDT	Flash Flood Warning	PHI	Lehigh	3 hr
Apr 15, 6:05 PM EDT	Areal Flood Advisory	PHI	Bucks	96 min
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, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	26 min
Apr 15, 1:55 PM EDT	Areal Flood Advisory	PHI	Sussex	6 hr
Apr 15, 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, 4:19 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, 6:32 PM EDT	Areal Flood Warning	PHI	Hunterdon	5 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023 Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.