Alert archive / Pennsylvania / Tornado Warnings in 2020
Tornado Warning 23, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 4, 2020, 9:29 AM EDT for Monroe County, Northampton County, Pennsylvania. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2020, 9:29 AM EDT (13:29 UTC)
- Expired
- Aug 4, 2020, 10:00 AM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 13:31 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 1.5 hours before the alert went out and 195 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
- 1593 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 7.4
The text
As transmitted.
874
WFUS51 KPHI 041329
TORPHI
PAC089-095-041400-
/O.NEW.KPHI.TO.W.0023.200804T1329Z-200804T1400Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
929 AM EDT Tue Aug 4 2020
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Central Monroe County in northeastern Pennsylvania...
Northeastern Northampton County in eastern Pennsylvania...
* Until 1000 AM EDT.
* At 929 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Pen Argyl, or 11 miles north of Easton, moving
north at 40 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...
Mount Pocono, East Stroudsburg, Bangor, Pen Argyl, Wind Gap, East
Bangor, Stormville, Reeders, Henryville, Saylorsburg, Analomink,
Delaware Water Gap, McMichael, Tannersville, Scotrun, Pocono Pines,
Stroudsburg, Roseto, Arlington Heights and Shawnee.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 296 and 314.
Interstate 380 in Pennsylvania between mile markers 0 and 3.
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.
&&
LAT...LON 4110 7507 4100 7511 4098 7514 4096 7512
4080 7518 4081 7533 4112 7545
TIME...MOT...LOC 1329Z 171DEG 34KT 4085 7525
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Gorse2 follow-up statements
632
WWUS51 KPHI 041338
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
938 AM EDT Tue Aug 4 2020
PAC089-095-041400-
/O.CON.KPHI.TO.W.0023.000000T0000Z-200804T1400Z/
Monroe PA-Northampton PA-
938 AM EDT Tue Aug 4 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT FOR CENTRAL
MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES...
At 938 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Pen Argyl, or 15 miles south of Mount Pocono, moving
north at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Mount Pocono, East Stroudsburg, Bangor, Pen Argyl, East Bangor,
Stormville, Reeders, Henryville, Saylorsburg, Analomink, Delaware
Water Gap, McMichael, Tannersville, Scotrun, Pocono Pines,
Stroudsburg, Roseto, Arlington Heights, Shawnee and Marshalls Creek.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 296 and 314.
Interstate 380 in Pennsylvania between mile markers 0 and 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4110 7507 4100 7511 4098 7514 4096 7512
4088 7516 4087 7535 4112 7545
TIME...MOT...LOC 1338Z 169DEG 29KT 4091 7527
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Gorse859
WWUS51 KPHI 041348
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
948 AM EDT Tue Aug 4 2020
PAC095-041358-
/O.CAN.KPHI.TO.W.0023.000000T0000Z-200804T1400Z/
Northampton PA-
948 AM EDT Tue Aug 4 2020
...THE TORNADO WARNING FOR NORTHEASTERN NORTHAMPTON 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 400 PM EDT for northwestern
New Jersey.
LAT...LON 4110 7507 4100 7511 4098 7514 4096 7512
4095 7514 4094 7519 4093 7534 4112 7545
TIME...MOT...LOC 1348Z 171DEG 34KT 4101 7529
$$
PAC089-041400-
/O.CON.KPHI.TO.W.0023.000000T0000Z-200804T1400Z/
Monroe PA-
948 AM EDT Tue Aug 4 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT FOR CENTRAL
MONROE COUNTY...
At 948 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Tannersville, or 8 miles southeast of Mount Pocono,
moving north at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Mount Pocono, East Stroudsburg, Stormville, Reeders, Henryville,
Analomink, Delaware Water Gap, Tannersville, Scotrun, Pocono Pines,
Stroudsburg, Arlington Heights, Shawnee, Marshalls Creek and
Bartonsville.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 296 and 314.
Interstate 380 in Pennsylvania between mile markers 0 and 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4110 7507 4100 7511 4098 7514 4096 7512
4095 7514 4094 7519 4093 7534 4112 7545
TIME...MOT...LOC 1348Z 171DEG 34KT 4101 7529
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 5:17 AM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Aug 4, 7:23 AM EDT | Tornado Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 20 min |
| Aug 4, 7:28 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 3 hr |
| Aug 4, 8:11 AM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 4 hr |
| Aug 4, 8:19 AM EDT | River Flood Warning | PHI | Delaware | 15 hr |
| Aug 4, 8:19 AM EDT | Tornado Warning | PHI | Bucks | 26 min |
| Aug 4, 9:23 AM EDT | Tornado Warning | PHI | Chester | 22 min |
| Aug 4, 9:38 AM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 4 hr |
| Aug 4, 9:58 AM EDT | Tornado Warning | PHI | Monroe | 16 min |
| Aug 4, 10:02 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Aug 4, 10:20 AM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Aug 4, 10:51 AM EDT | Tornado Warning | PHI | Montgomery | 24 min |
| Aug 4, 11:01 AM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 4, 11:13 AM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Aug 4, 11:43 AM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 4 hr |
| Aug 4, 12:06 PM EDT | River Flood Warning | PHI | Chester | 11 hr |
| Aug 4, 12:37 PM EDT | River Flood Warning | PHI | Montgomery | 14 hr |
| Aug 4, 12:48 PM EDT | River Flood Warning | PHI | Chester, Delaware | 24 hr |
| Aug 4, 1:01 PM EDT | River Flood Warning | PHI | Bucks | 18 hr |
| Aug 4, 1:12 PM EDT | River Flood Warning | PHI | Berks | 10 hr |
| Aug 4, 1:12 PM EDT | River Flood Warning | PHI | Montgomery | 26 hr |
| Aug 4, 1:12 PM EDT | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 43 hr |
| Aug 4, 1:12 PM EDT | River Flood Warning | PHI | Montgomery, Philadelphia | 35 hr |
| Aug 4, 1:59 PM EDT | Areal Flood Warning | PHI | Chester, Delaware | 9 hr |
| Aug 4, 2:09 PM EDT | Areal Flood Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 15 hr |
| Aug 4, 2:23 PM EDT | River Flood Warning | PHI | Lehigh | 16 hr |
| Aug 4, 2:47 PM EDT | Areal Flood Warning | PHI | Bucks | 9 hr |
| Aug 4, 3:42 PM EDT | Areal Flood Warning | PHI | Lehigh, Northampton | 4 hr |
| Aug 4, 4:39 PM EDT | River Flood Warning | PHI | Monroe | 6 hr |
| Aug 4, 7:29 PM EDT | Areal Flood Warning | PHI | Lehigh, Northampton | 12 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.