Alert archive / Pennsylvania / Tornado Warnings in 2021
Tornado Warning 19, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2021, 4:56 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 34 min. 4 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 29, 2021, 4:56 PM EDT (20:56 UTC)
- Expired
- Jul 29, 2021, 5:30 PM EDT
- In force
- 34 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 20:58 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 29, 4:57 PM EDT | TSTM WND DMG | 2 Ssw Hellertown, PA | DOWNED TREES AND POWER LINES ON HAFLER ROAD OFF APPLES CHURCH ROAD IN LOWER SAUCON TOWNSHIP. TIME ESTIMATED FROM RADAR. POSSIBLE TORNADO. |
| Jul 29, 4:58 PM EDT | FUNNEL CLOUD | 2 Wsw Hellertown, PA | PHOTOGRAPH OF A FUNNEL CLOUD ON TWITTER JUST NORTH OF CENTER VALLEY, PA. |
| Jul 29, 4:58 PM EDT | TSTM WND DMG | 2 S Hellertown, PA | 3 TO 4 BUILDINGS DAMAGED AT THE INTERSECTION OF LEITHSVILLE RD AND WEAVERS LN. ALSO SOME TREE DAMAGE IN THE AREA. POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR. |
| Jul 29, 5:00 PM EDT | TSTM WND DMG | 2 S Hellertown, PA | THREE BUILDINGS DAMAGED NEAR THE INTERSECTION OF LEITHSVILLE ROAD AND WEAVERS LANE. |
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 29, 2:23 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 201 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
- 54 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 823 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
378
WFUS51 KPHI 292056
TORPHI
PAC017-077-095-292130-
/O.NEW.KPHI.TO.W.0019.210729T2056Z-210729T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
456 PM EDT Thu Jul 29 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
East central Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
South central Northampton County in eastern Pennsylvania...
* Until 530 PM EDT.
* At 456 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Hellertown, or near Allentown, moving east at 25
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Easton, Bethlehem, Wilson, Hellertown, West Easton, Riegelsville,
Glendon, Springtown, Old Orchard, Freemansburg and Coopersburg.
This includes Interstate 78 in Pennsylvania between mile markers 62
and 76.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4065 7519 4065 7520 4063 7518 4062 7520
4059 7519 4057 7519 4056 7516 4051 7540
4056 7544 4070 7521
TIME...MOT...LOC 2056Z 250DEG 21KT 4056 7537
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Staarmann3 follow-up statements
510
WWUS51 KPHI 292104
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
504 PM EDT Thu Jul 29 2021
PAC077-292113-
/O.CAN.KPHI.TO.W.0019.000000T0000Z-210729T2130Z/
Lehigh PA-
504 PM EDT Thu Jul 29 2021
...THE TORNADO WARNING FOR EAST CENTRAL LEHIGH COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
LAT...LON 4065 7519 4065 7520 4063 7518 4062 7520
4059 7519 4057 7519 4056 7516 4053 7532
4059 7535 4070 7521
TIME...MOT...LOC 2103Z 251DEG 22KT 4057 7530
$$
PAC017-095-292130-
/O.CON.KPHI.TO.W.0019.000000T0000Z-210729T2130Z/
Bucks PA-Northampton PA-
504 PM EDT Thu Jul 29 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR NORTH
CENTRAL BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 503 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Springtown, or 8 miles southwest of Easton, moving
east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Easton, Bethlehem, Wilson, Hellertown, West Easton, Riegelsville,
Glendon, Springtown and Old Orchard.
This includes Interstate 78 in Pennsylvania between mile markers 68
and 76.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4065 7519 4065 7520 4063 7518 4062 7520
4059 7519 4057 7519 4056 7516 4053 7532
4059 7535 4070 7521
TIME...MOT...LOC 2103Z 251DEG 22KT 4057 7530
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Staarmann186
WWUS51 KPHI 292110
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
510 PM EDT Thu Jul 29 2021
PAC017-095-292130-
/O.CON.KPHI.TO.W.0019.000000T0000Z-210729T2130Z/
Bucks PA-Northampton PA-
510 PM EDT Thu Jul 29 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR NORTH
CENTRAL BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 510 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Riegelsville, or near Easton, moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Easton, Wilson, West Easton, Riegelsville, Glendon, Springtown and
Old Orchard.
This includes Interstate 78 in Pennsylvania between mile markers 73
and 76.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4065 7519 4065 7520 4063 7518 4062 7520
4059 7519 4057 7519 4056 7516 4053 7530
4065 7527 4070 7521
TIME...MOT...LOC 2110Z 250DEG 22KT 4059 7522
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Staarmann038
WWUS51 KPHI 292117
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
517 PM EDT Thu Jul 29 2021
PAC095-292126-
/O.CAN.KPHI.TO.W.0019.000000T0000Z-210729T2130Z/
Northampton PA-
517 PM EDT Thu Jul 29 2021
...THE TORNADO WARNING FOR SOUTH CENTRAL NORTHAMPTON COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been
cancelled.
A Tornado Watch remains in effect until 900 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
LAT...LON 4059 7519 4057 7519 4056 7516 4054 7525
4059 7523 4061 7521
TIME...MOT...LOC 2116Z 250DEG 21KT 4060 7517
$$
PAC017-292130-
/O.CON.KPHI.TO.W.0019.000000T0000Z-210729T2130Z/
Bucks PA-
517 PM EDT Thu Jul 29 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR NORTH
CENTRAL BUCKS COUNTY...
At 516 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Riegelsville, or near Easton, moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Riegelsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4059 7519 4057 7519 4056 7516 4054 7525
4059 7523 4061 7521
TIME...MOT...LOC 2116Z 250DEG 21KT 4060 7517
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 42 min |
| Jul 29, 4:03 PM EDT | Tornado Warning | PHI | Berks, Lehigh, Northampton | 27 min |
| Jul 29, 4:27 PM EDT | Tornado Warning | PHI | Lehigh, Northampton | 16 min |
| Jul 29, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 45 min |
| Jul 29, 4:46 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 3 hr |
| Jul 29, 4:57 PM EDT | Areal Flood Advisory | PHI | Bucks, Monroe, Northampton | 3 hr |
| Jul 29, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 42 min |
| Jul 29, 5:08 PM EDT | Tornado Warning | PHI | Bucks | 37 min |
| Jul 29, 5:27 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 29, 5:32 PM EDT | Flash Flood Warning | PHI | Northampton | 2 hr |
| Jul 29, 5:32 PM EDT | Tornado Warning | PHI | Bucks | 28 min |
| Jul 29, 5:51 PM EDT | Tornado Warning | PHI | Bucks | 24 min |
| Jul 29, 5:58 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jul 29, 6:06 PM EDT | Tornado Warning | PHI | Bucks | 39 min |
| Jul 29, 6:21 PM EDT | Special Weather Statement | PHI | Bucks | 24 min |
| Jul 29, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 45 min |
| Jul 29, 7:07 PM EDT | Tornado Warning | PHI | Bucks, Philadelphia | 23 min |
| Jul 29, 7:12 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 4 hr |
| Jul 29, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 50 min |
Nearby
Tornado Warnings in Pennsylvania, 2021Every tornado warning in 2021Tornadoes in 2021
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.