Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 295, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2021, 7:59 PM EDT for 5 counties in Pennsylvania. It was in force for 61 min. 2 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
- Sep 8, 2021, 7:59 PM EDT (23:59 UTC)
- Expired
- Sep 8, 2021, 9:00 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Binghamton radar (KBGM), 143 km from the middle of the area, began a volume at 00:02 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 |
|---|---|---|---|
| Sep 8, 8:12 PM EDT | TSTM WND DMG | 1 N Pocono Mountains Mu, PA | TREE LIMBS WERE DOWNED ONTO WIRES NEAR HEMLOCK DR AT SHARBAUGH RD. |
| Sep 8, 8:25 PM EDT | TSTM WND GST 51 | New Tripoli, PA |
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 |
|---|---|---|---|
| Sep 8, 7:54 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 12.0 hours before the alert went out and 223 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
- 13 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1377 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
006
WUUS51 KPHI 082359
SVRPHI
PAC011-025-077-089-095-090100-
/O.NEW.KPHI.SV.W.0295.210908T2359Z-210909T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
759 PM EDT Wed Sep 8 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
North central Berks County in eastern Pennsylvania...
Northwestern Lehigh County in eastern Pennsylvania...
Carbon County in northeastern Pennsylvania...
Monroe County in northeastern Pennsylvania...
West central Northampton County in eastern Pennsylvania...
* Until 900 PM EDT.
* At 759 PM EDT, severe thunderstorms were located along a line
extending from near Pocono Pines to near McKeansburg, moving east
at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Lehighton, Mount Pocono, East Stroudsburg, Tobyhanna, Palmerton,
Jim Thorpe, Hamburg, Slatington, Nesquehoning, Weatherly,
Walnutport, Lenhartsville, Stormville, Neffs, Pocono Pines, Lake
Harmony, New Tripoli, Skytop, Tannersville and Long Pond.
This includes the following highways...
Northeast Extension between mile markers 62 and 91.
Interstate 78 in Pennsylvania between mile markers 33 and 47.
Interstate 80 in Pennsylvania between mile markers 288 and 310.
Interstate 380 in Pennsylvania between mile markers 0 and 13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4115 7515 4114 7509 4111 7505 4057 7569
4057 7601 4065 7598 4074 7576 4084 7591
4101 7573 4108 7558 4123 7553 4125 7513
TIME...MOT...LOC 2359Z 262DEG 29KT 4114 7542 4068 7597
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann3 follow-up statements
086
WWUS51 KPHI 090018
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
818 PM EDT Wed Sep 8 2021
PAC011-025-077-089-095-090100-
/O.CON.KPHI.SV.W.0295.000000T0000Z-210909T0100Z/
Berks PA-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
818 PM EDT Wed Sep 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTH CENTRAL BERKS...NORTHWESTERN LEHIGH...SOUTHEASTERN
CARBON...MONROE AND WEST CENTRAL NORTHAMPTON COUNTIES...
At 818 PM EDT, severe thunderstorms were located along a line
extending from near Paradise Valley to Penn Forest Reservoir to
Wanamakers, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Lehighton, Mount Pocono, East Stroudsburg, Tobyhanna, Palmerton, Jim
Thorpe, Hamburg, Slatington, Nesquehoning, Walnutport, Lenhartsville,
Stormville, Neffs, Pocono Pines, New Tripoli, Skytop, Tannersville,
Long Pond, Kresgeville and Sun Valley.
This includes the following highways...
Northeast Extension between mile markers 62 and 89.
Interstate 78 in Pennsylvania between mile markers 33 and 47.
Interstate 80 in Pennsylvania between mile markers 290 and 310.
Interstate 380 in Pennsylvania between mile markers 0 and 7.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4115 7515 4114 7509 4111 7505 4057 7569
4057 7601 4065 7598 4074 7576 4082 7588
4101 7565 4115 7544 4124 7539 4125 7513
TIME...MOT...LOC 0018Z 260DEG 28KT 4115 7531 4093 7554 4068 7587
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann938
WWUS51 KPHI 090038
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
838 PM EDT Wed Sep 8 2021
PAC011-025-077-089-095-090100-
/O.CON.KPHI.SV.W.0295.000000T0000Z-210909T0100Z/
Berks PA-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
838 PM EDT Wed Sep 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTH CENTRAL BERKS...NORTHWESTERN LEHIGH...SOUTHEASTERN
CARBON...CENTRAL MONROE AND WEST CENTRAL NORTHAMPTON COUNTIES...
At 837 PM EDT, severe thunderstorms were located along a line
extending from 7 miles northwest of Bushkill to near Reeders to near
Jordan Valley, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Lehighton, Mount Pocono, East Stroudsburg, Palmerton, Hamburg,
Slatington, Walnutport, Lenhartsville, Stormville, Neffs, New
Tripoli, Skytop, Tannersville, Kresgeville, Sun Valley, Reeders,
Beltzville State Park, Saylorsburg, McMichael and Canadensis.
This includes the following highways...
Northeast Extension between mile markers 62 and 78.
Interstate 78 in Pennsylvania between mile markers 33 and 47.
Interstate 80 in Pennsylvania between mile markers 296 and 310.
Interstate 380 in Pennsylvania between mile markers 0 and 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4115 7515 4114 7509 4111 7505 4057 7569
4057 7601 4065 7598 4074 7576 4077 7579
4097 7552 4110 7541 4123 7524 4125 7513
TIME...MOT...LOC 0037Z 257DEG 32KT 4117 7511 4100 7528 4070 7567
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann787
WWUS51 KPHI 090052
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
852 PM EDT Wed Sep 8 2021
PAC011-025-077-089-095-090102-
/O.EXP.KPHI.SV.W.0295.000000T0000Z-210909T0100Z/
Berks PA-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
852 PM EDT Wed Sep 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BERKS...
NORTHWESTERN LEHIGH...SOUTHEASTERN CARBON...CENTRAL MONROE AND WEST
CENTRAL NORTHAMPTON COUNTIES WILL EXPIRE AT 900 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
eastern and northeastern Pennsylvania.
LAT...LON 4115 7515 4114 7509 4111 7505 4057 7569
4057 7601 4065 7598 4074 7576 4077 7579
4097 7552 4110 7541 4123 7524 4125 7513
TIME...MOT...LOC 0052Z 262DEG 29KT 4118 7497 4101 7514 4071 7554
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 7:17 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 43 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning 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.