Alert archive / Pennsylvania / Tornado Warnings in 2021
Tornado Warning 17, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2021, 4:03 PM EDT for Berks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 27 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 29, 2021, 4:03 PM EDT (20:03 UTC)
- Expired
- Jul 29, 2021, 4:30 PM EDT
- In force
- 27 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Berks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 134 km from the middle of the area, began a volume at 20:07 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, 4:04 PM EDT | TORNADO | 4 N Greenwich Twp, PA | A TORNADO TOUCHED DOWN NEAR TURKEY RD IN KEMPTON, ALBANY TWP, BERKS COUNTY, PA, JUST WEST OF THE BORDER WITH LEHIGH COUNTY. ABOUT 15 TREES WERE UPROOTED IN THE AREA OF TURKEY RD WITH A CONVERGENT DAMAGE PATTERN NOTED IN MULTIPLE NEARBY CORN FIELDS. THE PATH CO |
| Jul 29, 4:05 PM EDT | TSTM WND DMG | 1 Nw Weisenberg Twp, PA | UTILITY POLES DOWN. |
| Jul 29, 4:05 PM EDT | TSTM WND DMG | New Tripoli, PA | DOWNED TREES AND POWER LINES IN THE NEW TRIPOLI AREA. SOME STRUCTURAL DAMAGE TO AN OUTSIDE BARN AS WELL WITH PIECES OF ROOFING OFF. TIME ESTIMATED FROM RADAR. |
| Jul 29, 4:06 PM EDT | TORNADO | 3 Wnw Weisenberg Twp, PA | A TORNADO TOUCHED DOWN BETWEEN KUNKELS MILL RD AND RED RD NEAR THE FAR SOUTHERN TIP OF LYNN TWP IN LEHIGH COUNTY, PENNSYLVANIA, JUST EAST OF THE COUNTY LINE WITH BERKS COUNTY. MOSTLY MINOR CROP AND TREE DAMAGE WAS OBSERVED IN THIS AREA, BUT WITH A CLEAR CONVER |
| Jul 29, 4:14 PM EDT | TSTM WND DMG | 1 Ese Weisenberg Twp, PA | TREES AND WIRES DOWN ON 863. ROUTE 863 IS CLOSED DUE TO DEBRIS. |
| Jul 29, 4:15 PM EDT | TSTM WND DMG | 1 Nw Weisenberg Twp, PA | TREES AND WIRES DOWN WITH PARTIALLY TORN OFF ROOF OF A BUILDING. POSSIBLE TORNADO DAMAGE. TIME ESTIMATED BY 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 29, 2:23 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 230 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
- 269 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
837
WFUS51 KPHI 292003
TORPHI
PAC011-077-095-292030-
/O.NEW.KPHI.TO.W.0017.210729T2003Z-210729T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
403 PM EDT Thu Jul 29 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Northeastern Berks County in eastern Pennsylvania...
Central Lehigh County in eastern Pennsylvania...
Western Northampton County in eastern Pennsylvania...
* Until 430 PM EDT.
* At 403 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Wanamakers, or 14 miles southeast of Tamaqua,
moving east at 15 mph.
HAZARD...Tornado and quarter size hail.
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...
Allentown, Emmaus, Northampton, Kutztown, Topton, Lenhartsville,
Neffs, Wanamakers, Coffeetown, New Tripoli, Ancient Oaks,
Schnecksville, Claussville, Macungie, Alburtis, Hokendauqua and
Fullerton.
This includes the following highways...
Northeast Extension between mile markers 50 and 67.
Interstate 78 in Pennsylvania between mile markers 36 and 58.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4051 7591 4065 7591 4076 7552 4050 7548
TIME...MOT...LOC 2003Z 260DEG 14KT 4061 7583
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Fitzsimmons1 follow-up statement
592
WWUS51 KPHI 292014
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
414 PM EDT Thu Jul 29 2021
PAC011-077-095-292030-
/O.CON.KPHI.TO.W.0017.000000T0000Z-210729T2030Z/
Berks PA-Lehigh PA-Northampton PA-
414 PM EDT Thu Jul 29 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
NORTHEASTERN BERKS...CENTRAL LEHIGH AND WESTERN NORTHAMPTON
COUNTIES...
At 414 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Claussville, or 13 miles west of Allentown, moving
east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Allentown, Emmaus, Northampton, Kutztown, Neffs, Coffeetown, New
Tripoli, Ancient Oaks, Schnecksville, Claussville, Coplay,
Hokendauqua and Fullerton.
This includes the following highways...
Northeast Extension between mile markers 53 and 67.
Interstate 78 in Pennsylvania between mile markers 41 and 58.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4053 7582 4067 7582 4076 7552 4053 7548
TIME...MOT...LOC 2014Z 257DEG 22KT 4063 7573
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
FitzsimmonsThe 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, 4:27 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, 4:56 PM EDT | Tornado Warning | PHI | Bucks, Lehigh, Northampton | 34 min |
| 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.