Alert archive / Pennsylvania / Tornado Warnings in 2021
Tornado Warning 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2021, 5:32 PM EDT for Bucks County, Pennsylvania; Hunterdon County, New Jersey. It was in force for 28 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, 5:32 PM EDT (21:32 UTC)
- Expired
- Jul 29, 2021, 6:00 PM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Hunterdon County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 21:36 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, 5:40 PM EDT | TORNADO | 1 N Gardenville, PA | TREE DAMAGE BEGAN IN THE AREA OF BRADSHAW RD IN PLUMSTEAD TWP IN BUCKS COUNTY, WHERE A FEW SIZABLE LIMBS WERE DOWNED AND A COUPLE OF LARGER BUT WEAKENED TREES WERE SNAPPED. THE TORNADO THEN ENTERED A CORNFIELD NEAR THE INTERSECTION OF FERRY RD AND POINT PLEASA |
| Jul 29, 5:50 PM EDT | TSTM WND DMG | Lahaska, PA | WIDESPREAD TREE DAMAGE ALONG WITH SOME DAMAGE TO STRUCTURES IN BUCKINGHAM TOWNSHIP. |
| Jul 29, 5:57 PM EDT | TSTM WND DMG | New Hope, PA | NUMEROUS REPORTS OF TREES AND LINES DOWN IN NEW HOPE. POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR. |
| Jul 29, 5:59 PM EDT | TORNADO | 1 S New Hope, PA | THE SUPERCELL STORM WHICH PRODUCED A TORNADO IN PLUMSTEAD TWP CYCLED AND PRODUCED ANOTHER TORNADO BEGINNING IN NEW HOPE IN BUCKS COUNTY, PENNSYLVANIA. TREE DAMAGE BEGAN NEAR RIVER RD JUST WEST OF THE DELAWARE RIVER, WITH A PORTION OF RIVER RD CLOSED AND IMPASS |
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, 9.5 hours before the alert went out and 187 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.
918
WFUS51 KPHI 292132
TORPHI
NJC019-PAC017-292200-
/O.NEW.KPHI.TO.W.0021.210729T2132Z-210729T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
532 PM EDT Thu Jul 29 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
South central Hunterdon County in northwestern New Jersey...
North central Bucks County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 532 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Pipersville, or 18 miles south of Easton, 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...
Byram, Bedminster, Flemington, Tinicum, New Hope, Dublin,
Frenchtown, Stockton, Revere, Ottsville, Sergeantsville,
Pipersville, Erwinna, Gardenville, Lumberville, Sand Brook and
Lambertville.
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 4034 7490 4034 7494 4031 7491 4030 7492
4038 7527 4053 7521 4054 7484
TIME...MOT...LOC 2132Z 279DEG 22KT 4042 7516
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Fitzsimmons1 follow-up statement
813
WWUS51 KPHI 292145
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
545 PM EDT Thu Jul 29 2021
NJC019-PAC017-292200-
/O.CON.KPHI.TO.W.0021.000000T0000Z-210729T2200Z/
Hunterdon NJ-Bucks PA-
545 PM EDT Thu Jul 29 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR SOUTH
CENTRAL HUNTERDON AND CENTRAL BUCKS COUNTIES...
At 545 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Gardenville, or 19 miles northwest of Trenton,
moving east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Byram, Tinicum, New Hope, Stockton, Pipersville, Gardenville,
Sergeantsville, Lumberville and Lambertville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4036 7518 4046 7513 4045 7487 4034 7490
4034 7494 4031 7491 4030 7492
TIME...MOT...LOC 2145Z 285DEG 21KT 4038 7507
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
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, 4:03 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, 4:56 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, 5:51 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 |
| Jul 29, 3:33 AM EDT | Small Craft Advisory | PHI | 20 hr | |
| Jul 29, 1:33 PM EDT | Special Marine Warning | PHI | 42 min | |
| Jul 29, 2:53 PM EDT | Special Marine Warning | PHI | 100 min | |
| Jul 29, 4:26 PM EDT | Special Weather Statement | PHI | Morris | 34 min |
| Jul 29, 5:01 PM EDT | Special Weather Statement | PHI | Morris | 29 min |
| Jul 29, 6:44 PM EDT | Tornado Warning | PHI | Mercer, Monmouth, Ocean | 46 min |
| Jul 29, 6:56 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Monmouth, Ocean, Somerset | 4 hr |
| Jul 29, 7:18 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Monmouth, Ocean | 27 min |
| Jul 29, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 47 min |
| Jul 29, 7:52 PM EDT | Special Marine Warning | PHI | 113 min |
Nearby
Tornado Warnings in Pennsylvania, 2021Tornado Warnings in New Jersey, 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.