Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 248, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2019, 10:14 PM EDT for 5 counties in Pennsylvania. It was in force for 46 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
- Jul 21, 2019, 10:14 PM EDT (02:14 UTC)
- Expired
- Jul 21, 2019, 11:00 PM EDT
- In force
- 46 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), 107 km from the middle of the area, began a volume at 02:15 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 21, 10:15 PM EDT | TSTM WND GST 70 | Trexlertown, PA | CHASER ESTIMATES GUSTS UP TO 70MPH. |
| Jul 21, 10:25 PM EDT | TSTM WND DMG | Emmaus, PA | SEVERAL REPORTS OF TREES AND WIRES DOWN. TIME ESTIMATED FROM RADAR. |
| Jul 21, 10:25 PM EDT | TSTM WND DMG | Trexlertown, PA | MULTIPLE TRANSFORMERS EXPLODING WITH ESTIMATED GUSTS TO AT LEAST 60MPH. |
| Jul 21, 10:30 PM EDT | TSTM WND DMG | 1 Ene Salisbury Twp, PA | DOWNED TREES AND WIRES ON CHURCH RD. |
| Jul 21, 10:30 PM EDT | TSTM WND DMG | 1 W Salisbury Twp, PA | DOWNED WIRES ON ELLSWORTH ST. |
| Jul 21, 11:06 PM EDT | TSTM WND DMG | 1 N Lyons, PA | DOWNED TREE ON BASTIAN ROAD IN MAXATAWNY TWP. 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 00:00Z, 2.2 hours before the alert went out and 216 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
- 2295 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1588 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted.
115
WUUS51 KPHI 220214
SVRPHI
PAC011-017-077-091-095-220300-
/O.NEW.KPHI.SV.W.0248.190722T0214Z-190722T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1014 PM EDT Sun Jul 21 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...
Southern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
South central Northampton County in eastern Pennsylvania...
* Until 1100 PM EDT.
* At 1014 PM EDT, a severe thunderstorm was located over Ancient
Oaks, or 7 miles southwest of Allentown, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Allentown, Bethlehem, Emmaus, Quakertown, Perkasie, Souderton,
Bedminster, Hellertown, Kutztown, Fleetwood, Chalfont, East
Greenville, Dublin, Topton, Leesport, Ferndale, Shoemakersville,
Bally, Riegelsville and Lyons.
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 this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4061 7592 4060 7519 4057 7519 4057 7516
4058 7515 4058 7512 4057 7511 4029 7519
4045 7599
TIME...MOT...LOC 0214Z 279DEG 28KT 4052 7558
HAIL...<.75IN
WIND...60MPH
$$
CMS3 follow-up statements
569
WWUS51 KPHI 220227
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1027 PM EDT Sun Jul 21 2019
PAC011-017-077-091-095-220300-
/O.CON.KPHI.SV.W.0248.000000T0000Z-190722T0300Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
1027 PM EDT Sun Jul 21 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR NORTHEASTERN BERKS...NORTHWESTERN MONTGOMERY...SOUTHERN LEHIGH...
NORTHWESTERN BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 1026 PM EDT, a severe thunderstorm was located over Emmaus, or
near Allentown, moving east at 30 mph.
HAZARD...70 mph wind gusts.
SOURCE...Trained weather spotters. There have been several reports
of trees down in Lehigh County with this storm.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Allentown, Bethlehem, Emmaus, Quakertown, Perkasie, Souderton,
Bedminster, Hellertown, Kutztown, Fleetwood, Chalfont, East
Greenville, Dublin, Topton, Leesport, Ferndale, Shoemakersville,
Bally, Riegelsville and Lyons.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4061 7592 4060 7519 4057 7519 4057 7516
4058 7515 4058 7512 4057 7511 4029 7519
4045 7599
TIME...MOT...LOC 0226Z 269DEG 28KT 4051 7549
HAIL...<.75IN
WIND...70MPH
$$
CMS292
WWUS51 KPHI 220248
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1048 PM EDT Sun Jul 21 2019
PAC011-017-077-091-095-220300-
/O.CON.KPHI.SV.W.0248.000000T0000Z-190722T0300Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
1048 PM EDT Sun Jul 21 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR NORTHEASTERN BERKS...NORTH CENTRAL MONTGOMERY...SOUTHEASTERN
LEHIGH...NORTHWESTERN BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 1048 PM EDT, a severe thunderstorm was located over Emmaus, or
near Allentown, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. Numerous reports of wind damage have been
received from Lehigh County.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Bethlehem, Emmaus, Quakertown, Perkasie, Bedminster,
Hellertown, Kutztown, Fleetwood, Chalfont, East Greenville, Dublin,
Topton, Ferndale, Bally, Riegelsville, Lyons, Pleasant Valley, Fricks
and Revere.
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 this storm.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4060 7519 4057 7519 4057 7516 4058 7515
4058 7512 4057 7511 4029 7519 4043 7569
4047 7586 4061 7574
TIME...MOT...LOC 0248Z 270DEG 28KT 4051 7549
HAIL...<.75IN
WIND...60MPH
$$
CMS818
WWUS51 KPHI 220255
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1055 PM EDT Sun Jul 21 2019
PAC011-017-077-091-095-220305-
/O.EXP.KPHI.SV.W.0248.000000T0000Z-190722T0300Z/
Berks PA-Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
1055 PM EDT Sun Jul 21 2019
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BERKS...NORTH
CENTRAL MONTGOMERY...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND
SOUTH CENTRAL NORTHAMPTON COUNTIES WILL EXPIRE AT 1100 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 4060 7519 4057 7519 4057 7516 4058 7515
4058 7512 4057 7511 4029 7519 4043 7569
4047 7586 4061 7574
TIME...MOT...LOC 0255Z 279DEG 28KT 4050 7544
$$
CMSThe 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, 10:30 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, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 50 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, 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.