Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 266, NWS Philadelphia/Mount Holly

July 22, 20195 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2019, 4:55 PM EDT for 5 counties in Pennsylvania. It was in force for 50 min. 11 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 22, 2019, 4:55 PM EDT (20:55 UTC)
Expired: Jul 22, 2019, 5:45 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 112 km from the middle of the area, began a volume at 20:57 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 22, 4:55 PM EDT	TSTM WND DMG	1 S Weisenberg Twp, PA	CORRECTS TIME OF PREVIOUS TSTM WND DMG REPORT FROM 1 S WEISENBERG TWP. TREES DOWN ON WILLOW RUN RD. TIME ESTIMATED FROM RADAR.
Jul 22, 4:55 PM EDT	TSTM WND DMG	Weisenberg Twp, PA	CORRECTS PREVIOUS TIME OF TSTM WND DMG REPORT FROM WEISENBERG TWP. TREES AND WIRES DOWN IN WEISENBERG TWP. TIME ESTIMATED FROM RADAR.
Jul 22, 5:10 PM EDT	TSTM WND DMG	Upper Milford Twp, PA	TREES AND WIRES DOWN IN UPPER MILFORD.
Jul 22, 5:11 PM EDT	TSTM WND DMG	Upper Milford Twp, PA	MULTIPLE TREES DOWN ON AND NEAR KINGS HIGHWAY. TIME ESTIMATED FROM RADAR.
Jul 22, 5:12 PM EDT	TSTM WND DMG	2 Ssw Huffs Church, PA	DOWNED TREE ON HARDT HILL ROAD. TIME ESTIMATED FROM RADAR.
Jul 22, 5:15 PM EDT	TSTM WND DMG	1 Ese Northampton, PA	DOWNED TREE ON HOWERTOWN ROAD. TIME ESTIMATED FROM RADAR.
Jul 22, 5:19 PM EDT	TSTM WND DMG	Vera Cruz, PA	DOWNED TREE ON INTERSTATE 476 BETWEEN SOUTH OF THE INTERSTATE 78 INTERCHANGE. TIME ESTIMATED FROM RADAR.
Jul 22, 5:22 PM EDT	TSTM WND DMG	1 S Steuben, PA	DOWNED TREE CLOSED U.S. HIGHWAY 22 BETWEEN ROUTES 512 AND 191. TIME ESTIMATED FROM RADAR.
Jul 22, 5:26 PM EDT	TSTM WND DMG	1 E Earl Twp, PA	DOWNED TREE AT INTERSECTION OF KOCH ROAD AND IRONSTONE DRIVE. TIME ESTIMATED FROM RADAR.
Jul 22, 5:32 PM EDT	TSTM WND DMG	Salisbury Twp, PA	WATER RESCUE FROM A VEHICLE REPORTED.
Jul 22, 5:37 PM EDT	TSTM WND DMG	1 N Richlandtown, PA	MULTIPLE TREES AND WIRES DOWN ALONG WITH ONE OR MORE HOUSES POSSIBLY ON FIRE. 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.

Issued	Product	Office	Lasted
Jul 22, 2:17 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 206 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: 1598 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

413 
WUUS51 KPHI 222055
SVRPHI
PAC011-017-077-091-095-222145-
/O.NEW.KPHI.SV.W.0266.190722T2055Z-190722T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
455 PM EDT Mon Jul 22 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Berks County in eastern Pennsylvania...
  Northwestern Montgomery County in southeastern Pennsylvania...
  Lehigh County in eastern Pennsylvania...
  Northwestern Bucks County in southeastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 545 PM EDT.

* At 455 PM EDT, severe thunderstorms were located along a line
  extending from near Claussville to near Laureldale, moving east at
  40 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, Reading, Easton, Bethlehem, Forks, Emmaus, Wyomissing,
  Northampton, Quakertown, Wilson, Hellertown, Nazareth, Kutztown,
  Hamburg, Fleetwood, Laureldale, East Greenville, Bath, Topton and
  Leesport.

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.

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

&&

LAT...LON 4061 7595 4089 7507 4087 7505 4085 7507
      4085 7510 4082 7508 4077 7513 4078 7517
      4075 7519 4073 7518 4068 7520 4068 7517
      4065 7520 4059 7519 4031 7538 4036 7605
TIME...MOT...LOC 2055Z 248DEG 33KT 4060 7573 4039 7584 

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

CMS

2 follow-up statements

813 
WWUS51 KPHI 222121
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
521 PM EDT Mon Jul 22 2019

PAC011-017-077-091-095-222145-
/O.CON.KPHI.SV.W.0266.000000T0000Z-190722T2145Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
521 PM EDT Mon Jul 22 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN BERKS...NORTHWESTERN MONTGOMERY...LEHIGH...
NORTHWESTERN BUCKS AND NORTHAMPTON COUNTIES...

At 520 PM EDT, severe thunderstorms were located along a line
extending from Steuben to 6 miles west of Bechtelsville, moving east
at 30 mph.

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

SOURCE...Law enforcement. Several reports of trees and wires down 
         have been received from Lehigh County in association with 
         these storms.

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

Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Quakertown,
Wilson, Hellertown, Nazareth, Kutztown, East Greenville, Bath,
Topton, Belfast, West Easton, Tatamy, Bally, Bechtelsville and
Riegelsville.

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 4068 7571 4089 7507 4087 7505 4085 7507
      4085 7510 4082 7508 4077 7513 4078 7517
      4075 7519 4073 7518 4068 7520 4068 7517
      4065 7520 4059 7519 4031 7538 4035 7585
TIME...MOT...LOC 2120Z 259DEG 25KT 4069 7538 4038 7574 

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

CMS

717 
WWUS51 KPHI 222140
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
540 PM EDT Mon Jul 22 2019

PAC011-017-077-091-095-222149-
/O.EXP.KPHI.SV.W.0266.000000T0000Z-190722T2145Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
540 PM EDT Mon Jul 22 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BERKS...
NORTHWESTERN MONTGOMERY...LEHIGH...NORTHWESTERN BUCKS AND 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.

A severe thunderstorm watch remains in effect until 1000 PM EDT for
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 4068 7571 4089 7507 4087 7505 4085 7507
      4085 7510 4082 7508 4077 7513 4078 7517
      4075 7519 4073 7518 4068 7520 4068 7517
      4065 7520 4059 7519 4031 7538 4035 7585
TIME...MOT...LOC 2139Z 248DEG 33KT 4075 7517 4044 7553 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:25 PM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Northampton	50 min
Jul 21, 8:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	46 min
Jul 21, 9:24 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Northampton	51 min
Jul 21, 9:30 PM EDT	Severe Thunderstorm Warning	PHI	Chester	45 min
Jul 21, 9:58 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	2 hr
Jul 21, 10:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	46 min
Jul 21, 10:30 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	3 hr
Jul 21, 10:31 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	3 hr
Jul 21, 10:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	40 min
Jul 21, 10:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	48 min
Jul 21, 10:54 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	25 min
Jul 21, 10:58 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	59 min
Jul 21, 11:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	40 min
Jul 21, 11:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	44 min
Jul 21, 11:38 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	2 hr
Jul 21, 11:40 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton	50 min
Jul 22, 12:05 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	40 min
Jul 22, 12:45 AM EDT	Special Weather Statement	PHI	Monroe	30 min
Jul 22, 1:11 AM EDT	Special Weather Statement	PHI	Monroe	34 min
Jul 22, 5:32 AM EDT	Areal Flood Warning	PHI	Lehigh	49 min
Jul 22, 1:28 PM EDT	Special Weather Statement	PHI	Monroe	32 min
Jul 22, 1:50 PM EDT	Special Weather Statement	PHI	Northampton	25 min
Jul 22, 3:18 PM EDT	Special Weather Statement	PHI	Chester	57 min
Jul 22, 3:27 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	48 min
Jul 22, 3:33 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe, Northampton	7 hr
Jul 22, 3:39 PM EDT	Special Weather Statement	PHI	Berks	51 min
Jul 22, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	58 min
Jul 22, 4:11 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Jul 22, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	59 min
Jul 22, 4:40 PM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	114 min
Jul 22, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	41 min
Jul 22, 5:05 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	4 hr
Jul 22, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	61 min
Jul 22, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	73 min
Jul 22, 5:34 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Montgomery, Northampton	4 hr
Jul 22, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	80 min
Jul 22, 5:43 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 22, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	40 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.