Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 273, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2023, 6:53 PM EDT for 7 counties in Pennsylvania. It was in force for 52 min. 7 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
- Aug 7, 2023, 6:53 PM EDT (22:53 UTC)
- Expired
- Aug 7, 2023, 7:45 PM EDT
- In force
- 52 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, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 134 km from the middle of the area, began a volume at 22:52 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 |
|---|---|---|---|
| Aug 7, 6:55 PM EDT | TSTM WND DMG | 1 Sse Lyons, PA | Trees and wires down in the Lyons and Rockland Township area. |
| Aug 7, 7:00 PM EDT | TSTM WND DMG | Breinigsville, PA | Video shared on social media with trees down in Breinigsville. Time estimated via radar. |
| Aug 7, 7:12 PM EDT | TSTM WND DMG | Upper Milford Twp, PA | Report of tree down in Upper Milford Twp on social media. Time estimated via radar. |
| Aug 7, 7:15 PM EDT | TSTM WND GST 65 | Breinigsville, PA | Weather station blew over. Trained spotter estimated 60-70 mph gusts. |
| Aug 7, 7:20 PM EDT | TSTM WND DMG | 1 Wnw Milford Twp, PA | Large tree fell on a house with some structural damage. No injuries. Report via social media, with photos. |
| Aug 7, 7:21 PM EDT | TORNADO | 2 Sse Lehigh Valley Int, PA | On the evening of August 7th, an EF-1 tornado occurred, primarily in the Midway Manor neighborhood of Allentown, Pennsylvania. The tornado began near East Pennsylvania Street between North Ulster Street and North Van Buren Street. At this location, damage to t |
| Aug 7, 7:51 PM EDT | TSTM WND GST 54 | Lehigh Valley Internati, PA | ASOS station KABE Lehigh Valley Intl Airport. |
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 |
|---|---|---|---|
| Aug 7, 3:13 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.9 hours before the alert went out and 235 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
- 36 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 726 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
076
WUUS51 KPHI 072253
SVRPHI
PAC011-017-025-077-089-091-095-072345-
/O.NEW.KPHI.SV.W.0273.230807T2253Z-230807T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
653 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Eastern Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Southeastern Carbon County in northeastern Pennsylvania...
West central Bucks County in southeastern Pennsylvania...
Southwestern Monroe County in northeastern Pennsylvania...
Southwestern Northampton County in eastern Pennsylvania...
* Until 745 PM EDT.
* At 652 PM EDT, severe thunderstorms were located along a line
extending from near Christmans to near Claussville to near
Birdsboro, moving northeast at 25 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, Lehighton, Bethlehem, Pottstown, Emmaus, Northampton,
Nazareth, Palmerton, Birdsboro, Kutztown, Jim Thorpe, Slatington,
Fleetwood, East Greenville, Wind Gap, Bath, Walnutport, Topton,
Bally and Bechtelsville.
People at the Musikfest should seek safe shelter immediately!
This includes the following highways...
Northeast Extension between mile markers 44 and 82.
Interstate 78 in Pennsylvania between mile markers 37 and 66.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for eastern,
southeastern and northeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 PM EDT for eastern,
southeastern and northeastern Pennsylvania.
&&
LAT...LON 4102 7535 4082 7529 4033 7545 4019 7589
4057 7590 4069 7586 4074 7576 4078 7583
4087 7580
TIME...MOT...LOC 2252Z 235DEG 20KT 4092 7567 4060 7572 4023 7583
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL2 follow-up statements
901
WWUS51 KPHI 072336
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
736 PM EDT Mon Aug 7 2023
PAC011-017-091-072345-
/O.CAN.KPHI.SV.W.0273.000000T0000Z-230807T2345Z/
Berks PA-Montgomery PA-Bucks PA-
736 PM EDT Mon Aug 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BERKS...NORTHWESTERN
MONTGOMERY AND WEST CENTRAL BUCKS COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM EDT for eastern and
northeastern Pennsylvania.
LAT...LON 4102 7535 4082 7529 4062 7536 4057 7558
4082 7570 4090 7570
TIME...MOT...LOC 2335Z 227DEG 27KT 4099 7544 4079 7544 4061 7552
$$
PAC025-077-089-095-072345-
/O.CON.KPHI.SV.W.0273.000000T0000Z-230807T2345Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
736 PM EDT Mon Aug 7 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHEASTERN LEHIGH...SOUTHEASTERN CARBON...SOUTHWESTERN MONROE
AND SOUTHWESTERN NORTHAMPTON COUNTIES...
At 735 PM EDT, severe thunderstorms were located along a line
extending from Sun Valley to near Beersville to near Allentown,
moving northeast at 30 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, Bethlehem, Northampton, Nazareth, Palmerton, Jim Thorpe,
Slatington, Wind Gap, Bath, Walnutport, Steuben, Brodheadsville,
Kunkletown, Neffs, Gilbert, Coffeetown, Rossland, Berlinsville,
Emerald and Kresgeville.
People at the Musikfest should seek safe shelter immediately!
This includes the following highways...
Northeast Extension between mile markers 56 and 82.
Interstate 78 in Pennsylvania between mile markers 53 and 54.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for eastern and
northeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4102 7535 4082 7529 4062 7536 4057 7558
4082 7570 4090 7570
TIME...MOT...LOC 2335Z 227DEG 27KT 4099 7544 4079 7544 4061 7552
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL153
WWUS51 KPHI 072347
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
747 PM EDT Mon Aug 7 2023
PAC025-077-089-095-072355-
/O.EXP.KPHI.SV.W.0273.000000T0000Z-230807T2345Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
747 PM EDT Mon Aug 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LEHIGH...
SOUTHEASTERN CARBON...SOUTHWESTERN MONROE AND SOUTHWESTERN
NORTHAMPTON COUNTIES HAS EXPIRED...
The storms which prompted the warning have moved out of the initial
warning area. Therefore, the warning has been allowed to expire. A
Severe Thunderstorm Warning remains in effect for Monroe and
Northampton Counties until 815 PM EDT.
A Tornado Watch remains in effect until 1100 PM EDT for eastern and
northeastern Pennsylvania.
Remember, a Severe Thunderstorm Warning still remains in effect for
Monroe and Northampton Counties until 815 PM EDT.
LAT...LON 4102 7535 4082 7529 4062 7536 4057 7558
4082 7570 4090 7570
TIME...MOT...LOC 2345Z 235DEG 20KT 4102 7539 4082 7539 4064 7547
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:33 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 57 min |
| Aug 7, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 53 min |
| Aug 7, 5:57 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 79 min |
| Aug 7, 6:08 PM EDT | Tornado Warning | PHI | Chester | 19 min |
| Aug 7, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 69 min |
| Aug 7, 6:29 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 63 min |
| Aug 7, 6:35 PM EDT | Tornado Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 25 min |
| Aug 7, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 45 min |
| Aug 7, 7:00 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery, Northampton | 66 min |
| Aug 7, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 58 min |
| Aug 7, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 48 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2023Every 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.