Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 158, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2019, 3:20 PM EDT for 6 counties in Pennsylvania. It was in force for 55 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
- Jun 29, 2019, 3:20 PM EDT (19:20 UTC)
- Expired
- Jun 29, 2019, 4:15 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 19:20 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 29, 3:22 PM EDT | TSTM WND DMG | 1 Ene Mohnton, PA | DOWNED TREE ON WIRES ON WELSH ROAD IN CUMRU TWP. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:22 PM EDT | TSTM WND DMG | Kenhorst, PA | DOWNED TREE ONTO A HOUSE ON COMMONWEALTH BLVD IN KENHORST BORO. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:29 PM EDT | TSTM WND DMG | 2 Nnw Robeson Twp, PA | DOWNED TREE AT THE INTERSECTION OF CHRISTY COURT AND WHITE BEAR ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:32 PM EDT | TSTM WND DMG | 1 Sse Allentown, PA | NUMEROUS TREES AND POWERLINES DOWN IN THE AREA SOUTH OF SUSQUEHANNA ST. A FEW ROADS BLOCKED. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:35 PM EDT | TSTM WND DMG | 1 Nnw Upper Milford Twp, PA | DOWNED TREE IN WIRES AT THE INTERSECTION OF CHESTNUT STREET AND KINGS HIGHWAY. LANE CLOSURES IN PLACE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:39 PM EDT | TSTM WND DMG | 1 W Salisbury Twp, PA | SOCIAL MEDIA VIDEO FOOTAGE OF NUMEROUS TREES DOWN AND PROPERTY DAMAGE IN THE POTTER STREET AND TIOGA STREET SECTIONS OF ALLENTOWN. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:39 PM EDT | TSTM WND DMG | 2 Ssw Hanover Twp, PA | DOWNED TREE ON JACKSONVILLE ROAD NEAR MACADA ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:45 PM EDT | TSTM WND DMG | 1 S Bethlehem Twp, PA | SEVERAL REPORTS OF DOWNED TREES AND WIRES ON FREEMANSBURG AVENUE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:52 PM EDT | TSTM WND DMG | 1 Ssw Allentown, PA | PHOTO SHOWS A LARGE TREE DOWN ON A FENCE AND POWER LINES. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:58 PM EDT | TSTM WND DMG | 2 Ese East Coventry Twp, PA | DOWNED TREE IN WIRES AT THE INTERSECTION OF BETHEL CHURCH ROAD AND KOLB ROAD. LANE CLOSURES REQUIRED. TIME ESTIMATED FROM RADAR. |
| Jun 29, 4:03 PM EDT | TSTM WND DMG | 1 W Hellertown, PA | LARGE TREE LIMBS DOWNED. 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 |
|---|---|---|---|
| Jun 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.3 hours before the alert went out and 222 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.
- Mixed-layer CAPE
- 1180 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1077 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.3
The text
As transmitted.
594
WUUS51 KPHI 291920
SVRPHI
PAC011-017-029-077-091-095-292015-
/O.NEW.KPHI.SV.W.0158.190629T1920Z-190629T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
320 PM EDT Sat Jun 29 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Eastern Berks County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
North central Chester County in southeastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 415 PM EDT.
* At 320 PM EDT, severe thunderstorms were located along a line
extending from near New Mahoning to near Kutztown to near
Wernersville to Coatesville, moving east at 40 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, Reading, Easton, Bethlehem, Pottstown, Forks, Emmaus,
Wyomissing, Northampton, Wilson, Hellertown, Nazareth, Bangor,
Birdsboro, Kutztown, Slatington, Fleetwood, Sinking Spring,
Laureldale and Pen Argyl.
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 4053 7584 4070 7585 4078 7567 4086 7529
4093 7522 4096 7513 4086 7505 4085 7510
4080 7510 4075 7519 4068 7520 4068 7517
4065 7520 4061 7519 4047 7535 4006 7565
4009 7592 4011 7594 4014 7588 4029 7611
TIME...MOT...LOC 1920Z 251DEG 35KT 4077 7577 4056 7576 4029 7606 3996
7584
HAIL...1.00IN
WIND...60MPH
$$
CMS3 follow-up statements
908
WWUS51 KPHI 291939
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
339 PM EDT Sat Jun 29 2019
PAC011-017-029-077-091-095-292015-
/O.CON.KPHI.SV.W.0158.000000T0000Z-190629T2015Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Chester PA-Northampton PA-
339 PM EDT Sat Jun 29 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR EASTERN BERKS...NORTHWESTERN MONTGOMERY...LEHIGH...NORTHWESTERN
BUCKS...NORTH CENTRAL CHESTER AND NORTHAMPTON COUNTIES...
At 339 PM EDT, severe thunderstorms were located along a line
extending from Pen Argyl to Zionsville to Honey Brook to near
Lionville-Marchwood, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. Several instances of wind damage have been reported
in Berks County.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Allentown, Reading, Easton, Bethlehem, Pottstown, Forks, Emmaus,
Wyomissing, Northampton, Wilson, Hellertown, Nazareth, Bangor,
Birdsboro, Kutztown, Slatington, Fleetwood, Pen Argyl, East
Greenville and Wind Gap.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4056 7575 4075 7574 4078 7567 4086 7529
4093 7522 4096 7513 4086 7505 4085 7510
4080 7510 4075 7519 4068 7520 4068 7517
4065 7520 4061 7519 4047 7535 4006 7565
4009 7592 4011 7594 4014 7588 4024 7603
TIME...MOT...LOC 1939Z 299DEG 36KT 4086 7523 4048 7552 4012 7592 4001
7563
HAIL...1.00IN
WIND...60MPH
$$
CMS510
WWUS51 KPHI 292000
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
400 PM EDT Sat Jun 29 2019
PAC011-017-029-077-091-095-292015-
/O.CON.KPHI.SV.W.0158.000000T0000Z-190629T2015Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Chester PA-Northampton PA-
400 PM EDT Sat Jun 29 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHEASTERN BERKS...NORTHWESTERN MONTGOMERY...SOUTHEASTERN
LEHIGH...NORTHWESTERN BUCKS...NORTH CENTRAL CHESTER AND EASTERN
NORTHAMPTON COUNTIES...
At 400 PM EDT, severe thunderstorms were located along a line
extending from Hope to Springtown to Pughtown to King Of Prussia,
moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. Several reports of wind damage have been received
with this line of storms.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Allentown, Easton, Bethlehem, Pottstown, Forks, Emmaus, Wilson,
Hellertown, Nazareth, Bangor, East Greenville, Honey Brook, Belfast,
West Easton, Elverson, Tatamy, East Bangor, 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 4069 7538 4096 7513 4086 7505 4085 7510
4080 7510 4075 7519 4068 7520 4068 7517
4065 7520 4061 7519 4047 7535 4006 7565
4009 7592 4044 7559
TIME...MOT...LOC 2000Z 251DEG 35KT 4092 7500 4054 7529 4018 7569 4007
7540
HAIL...1.00IN
WIND...60MPH
$$
CMS878
WWUS51 KPHI 292007
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
407 PM EDT Sat Jun 29 2019
PAC011-017-029-077-091-095-292017-
/O.EXP.KPHI.SV.W.0158.000000T0000Z-190629T2015Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Chester PA-Northampton PA-
407 PM EDT Sat Jun 29 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS...
NORTHWESTERN MONTGOMERY...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS...
NORTH CENTRAL CHESTER AND EASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT
415 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A severe thunderstorm watch remains in effect until 700 PM EDT for
northwestern New Jersey...and eastern, southeastern and northeastern
Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4069 7538 4096 7513 4086 7505 4085 7510
4080 7510 4075 7519 4068 7520 4068 7517
4065 7520 4061 7519 4047 7535 4006 7565
4009 7592 4044 7559
TIME...MOT...LOC 2007Z 251DEG 35KT 4094 7492 4056 7521 4020 7561 4009
7532
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Jun 29, 2:46 PM EDT | Special Weather Statement | PHI | Chester | 29 min |
| Jun 29, 3:06 PM EDT | Special Weather Statement | PHI | Chester | 24 min |
| Jun 29, 3:09 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jun 29, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 36 min |
| Jun 29, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jun 29, 3:45 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jun 29, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Jun 29, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 49 min |
| Jun 29, 3:59 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Jun 29, 4:00 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Jun 29, 4:17 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 3 hr |
| Jun 29, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 47 min |
| Jun 29, 4:41 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 29, 7:10 PM EDT | Special Weather Statement | PHI | Berks | 35 min |
| Jun 29, 7:16 PM EDT | Special Weather Statement | PHI | Lebanon | 29 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2019Every 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.