Alert archive / Pennsylvania / Tornado Warnings in 2020
Tornado Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 2, 2020, 7:39 AM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 36 min. 1 report 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 2, 2020, 7:39 AM EDT (11:39 UTC)
- Expired
- Aug 2, 2020, 8:15 AM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 11:42 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 2, 7:57 AM EDT | TSTM WND DMG | 2 W Durham Twp, PA | DOWNED POWER LINES NEAR HAUPTS BRIDGE ROAD IN DURHAM 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, 11.7 hours before the alert went out and 213 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
- 18 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1421 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
747
WFUS51 KPHI 021139
TORPHI
PAC017-077-095-021215-
/O.NEW.KPHI.TO.W.0008.200802T1139Z-200802T1215Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
739 AM EDT Sun Aug 2 2020
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
South central Northampton County in eastern Pennsylvania...
* Until 815 AM EDT.
* At 739 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Pleasant Valley, or 7 miles southeast of
Allentown, moving northeast at 15 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, Hellertown, Pleasant Valley, Springtown, Old
Orchard, Coopersburg and Richlandtown.
This includes Interstate 78 in Pennsylvania near mile marker 64, and
between mile markers 66 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
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 4046 7543 4052 7547 4066 7527 4049 7516
TIME...MOT...LOC 1139Z 244DEG 14KT 4051 7539
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Staarmann2 follow-up statements
797
WWUS51 KPHI 021152
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
752 AM EDT Sun Aug 2 2020
PAC017-077-095-021215-
/O.CON.KPHI.TO.W.0008.000000T0000Z-200802T1215Z/
Lehigh PA-Bucks PA-Northampton PA-
752 AM EDT Sun Aug 2 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 AM EDT FOR EAST
CENTRAL LEHIGH...NORTHWESTERN BUCKS AND SOUTH CENTRAL NORTHAMPTON
COUNTIES...
At 752 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Pleasant Valley, or 8 miles southeast of Allentown,
moving northeast at 15 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Easton, Bethlehem, Hellertown, Pleasant Valley, Springtown, Old
Orchard, Coopersburg and Richlandtown.
This includes Interstate 78 in Pennsylvania near mile marker 64, and
between mile markers 66 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4047 7536 4055 7543 4066 7527 4049 7516
TIME...MOT...LOC 1152Z 244DEG 14KT 4053 7533
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Staarmann567
WWUS51 KPHI 021207
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
807 AM EDT Sun Aug 2 2020
PAC017-077-095-021217-
/O.EXP.KPHI.TO.W.0008.000000T0000Z-200802T1215Z/
Lehigh PA-Bucks PA-Northampton PA-
807 AM EDT Sun Aug 2 2020
...THE TORNADO WARNING FOR EAST CENTRAL LEHIGH...NORTHWESTERN BUCKS
AND SOUTH CENTRAL NORTHAMPTON COUNTIES WILL EXPIRE AT 815 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with this thunderstorm.
LAT...LON 4047 7536 4055 7543 4066 7527 4049 7516
TIME...MOT...LOC 1207Z 244DEG 14KT 4055 7526
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 3:32 AM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Aug 2, 4:42 AM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Aug 2, 6:30 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 45 min |
| Aug 2, 6:37 AM EDT | Tornado Warning | PHI | Berks, Lehigh | 23 min |
| Aug 2, 6:56 AM EDT | Tornado Warning | PHI | Berks, Lehigh | 34 min |
| Aug 2, 7:13 AM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 3 hr |
| Aug 2, 7:29 AM EDT | Special Weather Statement | PHI | Lehigh | 31 min |
| Aug 2, 7:34 AM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 3 hr |
| Aug 2, 7:49 AM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 84 min |
| Aug 2, 7:54 AM EDT | Special Weather Statement | PHI | Lehigh | 36 min |
| Aug 2, 8:24 AM EDT | Special Weather Statement | PHI | Lehigh | 36 min |
| Aug 2, 8:28 AM EDT | Areal Flood Warning | PHI | Berks | 3 hr |
| Aug 2, 8:46 AM EDT | Areal Flood Advisory | PHI | Northampton | 3 hr |
| Aug 2, 3:33 PM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 48 hr |
| Aug 2, 5:04 PM EDT | Tropical Storm Watch | PHI | Bucks, Delaware, Montgomery, Philadelphia | 18 hr |
| Aug 2, 5:14 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 31 min |
| Aug 2, 5:51 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 39 min |
| Aug 2, 6:29 PM EDT | Special Weather Statement | PHI | Northampton | 31 min |
Nearby
Tornado Warnings in Pennsylvania, 2020Every tornado warning in 2020Tornadoes in 2020
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.