Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 356, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 9, 2023, 4:57 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 49 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 9, 2023, 4:57 PM EDT (20:57 UTC)
- Expired
- Sep 9, 2023, 5:46 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 20:58 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 9, 5:05 PM EDT | TSTM WND DMG | Blairstown, NJ | 911 call center reports wires down in Blairstown. Time estimated via radar. |
| Sep 9, 5:14 PM EDT | TSTM WND GST 41 | 1 S Blairstown, NJ | AWOS station 1N79 Blairstown. |
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 9, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 177 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
- 1962 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
490
WUUS51 KPHI 092057
SVRPHI
NJC037-041-PAC089-095-092200-
/O.NEW.KPHI.SV.W.0356.230909T2057Z-230909T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
457 PM EDT Sat Sep 9 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Sussex County in northwestern New Jersey...
Northern Warren County in northwestern New Jersey...
East central Monroe County in northeastern Pennsylvania...
Northeastern Northampton County in eastern Pennsylvania...
* Until 600 PM EDT.
* At 457 PM EDT, a severe thunderstorm was located over Hope, or 15
miles southwest of Newton, moving north at 5 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...
East Stroudsburg, Blairstown, Belvidere, Hope, Columbia, Delaware
Water Gap, Allamuchy-Panther Valley, Stroudsburg, Portland, Hidden
Lake, Shawnee and Arlington Heights.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 312 and 314.
Interstate 80 in New Jersey between mile markers 0 and 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4091 7484 4083 7509 4102 7521 4109 7486
TIME...MOT...LOC 2057Z 167DEG 6KT 4092 7500
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann2 follow-up statements
551
WWUS51 KPHI 092114
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
514 PM EDT Sat Sep 9 2023
NJC037-041-PAC089-095-092200-
/O.CON.KPHI.SV.W.0356.000000T0000Z-230909T2200Z/
Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
514 PM EDT Sat Sep 9 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHWESTERN SUSSEX...NORTHERN WARREN...EAST CENTRAL MONROE AND
NORTHEASTERN NORTHAMPTON COUNTIES...
At 514 PM EDT, a severe thunderstorm was located over Blairstown, or
13 miles west of Newton, moving north at 10 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Wind damage
to roofs, siding, trees, and power lines is possible.
Locations impacted include...
East Stroudsburg, Blairstown, Hope, Columbia, Delaware Water Gap,
Stroudsburg, Portland, Hidden Lake, Shawnee and Arlington Heights.
This includes the following highways...
Interstate 80 in Pennsylvania between mile markers 312 and 314.
Interstate 80 in New Jersey between mile markers 0 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4093 7484 4089 7512 4102 7521 4109 7486
TIME...MOT...LOC 2114Z 170DEG 7KT 4100 7500
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann663
WWUS51 KPHI 092146
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
546 PM EDT Sat Sep 9 2023
NJC037-041-PAC089-095-092156-
/O.CAN.KPHI.SV.W.0356.000000T0000Z-230909T2200Z/
Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
546 PM EDT Sat Sep 9 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SUSSEX...NORTHERN
WARREN...EAST CENTRAL MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4093 7484 4089 7512 4102 7521 4109 7486
TIME...MOT...LOC 2144Z 167DEG 6KT 4105 7502
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 9:33 PM EDT | Special Weather Statement | PHI | Chester | 27 min |
| Sep 8, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 42 min |
| Sep 8, 10:17 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 43 min |
| Sep 8, 10:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Sep 8, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 47 min |
| Sep 8, 11:07 PM EDT | Special Weather Statement | PHI | Carbon | 53 min |
| Sep 9, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 56 min |
| Sep 9, 4:05 PM EDT | Flash Flood Warning | PHI | Philadelphia | 4 hr |
| Sep 9, 4:15 PM EDT | Special Weather Statement | PHI | Bucks | 30 min |
| Sep 9, 4:29 PM EDT | Special Weather Statement | PHI | Philadelphia | 31 min |
| Sep 9, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 45 min |
| Sep 9, 5:36 PM EDT | Special Weather Statement | PHI | Berks | 24 min |
| Sep 9, 5:43 PM EDT | Special Weather Statement | PHI | Lehigh | 32 min |
| Sep 9, 6:38 PM EDT | Special Weather Statement | PHI | Chester | 37 min |
| Sep 9, 7:20 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Sep 9, 7:24 PM EDT | Special Weather Statement | PHI | Berks | 36 min |
| Sep 9, 7:25 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| Sep 9, 7:56 PM EDT | Special Weather Statement | PHI | Berks | 64 min |
| Sep 9, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 64 min |
| Sep 9, 12:57 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 50 min |
| Sep 9, 1:17 PM EDT | Special Weather Statement | PHI | Ocean | 28 min |
| Sep 9, 1:46 PM EDT | Special Weather Statement | PHI | Ocean | 29 min |
| Sep 9, 2:07 PM EDT | Special Weather Statement | PHI | Atlantic | 38 min |
| Sep 9, 2:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Sep 9, 2:26 PM EDT | Special Weather Statement | PHI | Middlesex | 34 min |
| Sep 9, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Somerset | 48 min |
| Sep 9, 3:09 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 49 min |
| Sep 9, 3:40 PM EDT | Areal Flood Advisory | PHI | Middlesex, Morris, Somerset | 2 hr |
| Sep 9, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 43 min |
| Sep 9, 3:58 PM EDT | Special Weather Statement | PHI | Somerset | 32 min |
| Sep 9, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset, Sussex | 53 min |
| Sep 9, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 53 min |
| Sep 9, 4:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Sep 9, 4:42 PM EDT | Areal Flood Advisory | PHI | Morris | 3 hr |
| Sep 9, 4:49 PM EDT | Special Weather Statement | PHI | Warren | 41 min |
| Sep 9, 5:34 PM EDT | Special Weather Statement | PHI | Salem | 26 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2023Severe Thunderstorm Warnings in New Jersey, 2023Every severe thunderstorm warning in 2023
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.