Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 141, NWS Philadelphia/Mount Holly

June 28, 2019Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 28, 2019, 5:01 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 44 min. 6 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 28, 2019, 5:01 PM EDT (21:01 UTC)
Expired: Jun 28, 2019, 5:45 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 21:03 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
Jun 28, 5:17 PM EDT	TSTM WND GST 58	Lehigh Valley Internati, PA	50 KT GUST REPORTED AT KABE.
Jun 28, 5:19 PM EDT	TSTM WND DMG	Fullerton, PA	SEVERAL REPORTS OF TREES DOWN. TIME ESTIMATED FROM RADAR.
Jun 28, 5:20 PM EDT	HAIL 0.25	Hanover Twp, PA	MPING REPORT.
Jun 28, 5:29 PM EDT	TSTM WND DMG	1 Nne Upper Saucon Twp, PA	MPING REPORT OF TREE LIMBS DOWN AND SHINGLES BLOWN OFF AT THIS LOCATION. TIME ESTIMATED FROM RADAR.
Jun 28, 5:33 PM EDT	TSTM WND DMG	1 Nne Upper Saucon Twp, PA	REPORT OF POWER LINES DOWN NEAR THE INTERSECTION OF OLD BETHLEHEM PIKE AND SAUCON DRIVE. TIME ESTIMATED FROM RADAR.
Jun 28, 5:33 PM EDT	TSTM WND DMG	Hanover Twp, PA	TREE DOWN ONTO WIRES WITH A TRANSFORMER FIRE. 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, 9.0 hours before the alert went out and 229 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1992 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

196 
WUUS51 KPHI 282101
SVRPHI
PAC077-095-282145-
/O.NEW.KPHI.SV.W.0141.190628T2101Z-190628T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
501 PM EDT Fri Jun 28 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Lehigh County in eastern Pennsylvania...
  Southwestern Northampton County in eastern Pennsylvania...

* Until 545 PM EDT.

* At 501 PM EDT, a severe thunderstorm was located over Claussville,
  or 9 miles west of Allentown, 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...
  Allentown, Easton, Bethlehem, Emmaus, Northampton, Hellertown,
  Slatington, Walnutport, Steuben, Neffs, Coffeetown, Zionsville,
  Ancient Oaks, Emerald, Lehigh University, Claussville,
  Schnecksville, Old Orchard, Catasauqua and Fountain Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

&&

LAT...LON 4078 7563 4066 7525 4045 7554 4061 7579
TIME...MOT...LOC 2101Z 309DEG 10KT 4064 7564 

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

CMS

2 follow-up statements

272 
WWUS51 KPHI 282114
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
514 PM EDT Fri Jun 28 2019

PAC077-095-282145-
/O.CON.KPHI.SV.W.0141.000000T0000Z-190628T2145Z/
Lehigh PA-Northampton PA-
514 PM EDT Fri Jun 28 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR CENTRAL LEHIGH AND SOUTHWESTERN NORTHAMPTON COUNTIES...

At 513 PM EDT, severe thunderstorms were located along a line
extending from Steuben to near Northampton to Ancient Oaks, moving
southeast at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Allentown, Easton, Bethlehem, Emmaus, Northampton, Hellertown,
Walnutport, Steuben, Neffs, Coffeetown, Zionsville, Ancient Oaks,
Lehigh University, Claussville, Schnecksville, Old Orchard,
Berlinsville, Catasauqua, Fountain Hill and Coplay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 4066 7525 4045 7554 4056 7570 4077 7558
TIME...MOT...LOC 2113Z 296DEG 16KT 4067 7539 4064 7552 4053 7560 

HAIL...1.00IN
WIND...60MPH
 
$$

CMS

869 
WWUS51 KPHI 282144
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
544 PM EDT Fri Jun 28 2019

PAC077-095-282154-
/O.EXP.KPHI.SV.W.0141.000000T0000Z-190628T2145Z/
Lehigh PA-Northampton PA-
544 PM EDT Fri Jun 28 2019

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LEHIGH AND
SOUTHWESTERN NORTHAMPTON COUNTIES WILL EXPIRE AT 545 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

LAT...LON 4066 7525 4045 7554 4056 7570 4077 7558
TIME...MOT...LOC 2144Z 309DEG 10KT 4062 7531 4059 7544 4048 7552 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 2:28 PM EDT	Special Weather Statement	PHI	Carbon	32 min
Jun 28, 2:59 PM EDT	Special Weather Statement	PHI	Carbon	31 min
Jun 28, 3:14 PM EDT	Special Weather Statement	PHI	Carbon	31 min
Jun 28, 3:27 PM EDT	Special Weather Statement	PHI	Carbon	33 min
Jun 28, 3:55 PM EDT	Areal Flood Advisory	PHI	Carbon	2 hr
Jun 28, 4:02 PM EDT	Special Weather Statement	PHI	Carbon	28 min
Jun 28, 4:26 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	34 min
Jun 28, 4:31 PM EDT	Special Weather Statement	PHI	Chester	29 min
Jun 28, 4:55 PM EDT	Special Weather Statement	PHI	Lehigh	35 min
Jun 28, 5:06 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Montgomery	39 min
Jun 28, 5:23 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	76 min
Jun 28, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	48 min
Jun 28, 5:35 PM EDT	Flash Flood Warning	PHI	Lehigh, Northampton	2 hr
Jun 28, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	48 min
Jun 28, 5:45 PM EDT	Flash Flood Warning	PHI	Berks	2 hr
Jun 28, 6:13 PM EDT	Special Weather Statement	PHI	Bucks	32 min
Jun 28, 6:32 PM EDT	Special Weather Statement	PHI	Berks	28 min
Jun 28, 6:48 PM EDT	Special Weather Statement	PHI	Montgomery	27 min
Jun 28, 6:50 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery, Philadelphia	40 min
Jun 28, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	43 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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.