Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 193, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 5, 2017, 4:54 PM EDT for 5 counties in Pennsylvania; Warren County, New Jersey. It was in force for 51 min. 6 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 5, 2017, 4:54 PM EDT (20:54 UTC)
- Expired
- Sep 5, 2017, 5:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Warren County, NJ, Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 149 km from the middle of the area, began a volume at 20:55 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 5, 5:28 PM EDT | TSTM WND DMG | West Lawn, PA | TREE DOWN ON HOUSE AT WOODSIDE AND NOBLE STREETS. ALSO... PEA-SIZE HAIL. TIME BASED ON RADAR. |
| Sep 5, 5:30 PM EDT | TSTM WND DMG | Sinking Spring, PA | TREE DOWN ON HOUSE AND PEA TO MARBLE SIZE HAIL REPORTED IN SINKING SPRING PA. |
| Sep 5, 5:30 PM EDT | HAIL 0.5 | Sinking Spring, PA | PEA TO MARBLE SIZE HAIL REPORTED IN SINKING SPRING... PA... ALONG WITH A 50 MPH WIND GUST. |
| Sep 5, 5:38 PM EDT | TSTM WND DMG | Weisenberg, PA | WIRES DOWN. |
| Sep 5, 5:40 PM EDT | TSTM WND GST 60 | 1 Ne Reading, PA | |
| Sep 5, 5:50 PM EDT | HAIL 0.75 | West Wyomissing, PA | PENNY SIZE HAIL ALONG WITH HEAVY RAIN AND GUSTY WINDS. |
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 5, 3:26 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 237 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
- 4 J/kg
- Mixed-layer CIN
- -324 J/kg
- Mixed-layer LCL
- 1529 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
222
WUUS51 KPHI 052054
SVRPHI
NJC041-PAC011-025-077-089-095-052145-
/O.NEW.KPHI.SV.W.0193.170905T2054Z-170905T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
454 PM EDT TUE SEP 5 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central Warren County in northwestern New Jersey...
Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Carbon County in northeastern Pennsylvania...
Southwestern Monroe County in northeastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 545 PM EDT
* At 454 PM EDT, severe thunderstorms were located along a line
extending from near Wernersville to near Branchdale to near
Northampton, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Allentown, Reading, Easton, Lehighton, Bethlehem, Forks,
Wyomissing, Northampton, Wilson, Nazareth, Palmerton, Bangor,
Kutztown, Jim Thorpe, Hamburg, Slatington, Fleetwood, Sinking
Spring, Laureldale and Pen Argyl.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to 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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
4065 7598 4074 7576 4091 7599 4101 7573
4105 7577 4108 7577 4102 7548 4097 7510
4083 7492 4057 7548 4025 7605 4049 7643
TIME...MOT...LOC 2054Z 230DEG 32KT 4038 7606 4064 7632 4068 7553
HAIL...0.75IN
WIND...60MPH
$$
JRK3 follow-up statements
488
WWUS51 KPHI 052119
SVSPHI
Severe Weather Statement
National Weather Service MOUNT HOLLY NJ
519 PM EDT TUE SEP 5 2017
NJC041-PAC011-025-077-089-095-052145-
/O.CON.KPHI.SV.W.0193.000000T0000Z-170905T2145Z/
Warren NJ-Berks PA-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
519 PM EDT TUE SEP 5 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL WARREN...BERKS...LEHIGH...CARBON...SOUTHWESTERN
MONROE AND NORTHAMPTON COUNTIES...
At 517 PM EDT, severe thunderstorms were located along a line
extending from Claussville to near Womelsdorf to near Belvidere.
Storms are moving northeast along the line at around 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Allentown, Reading, Easton, Lehighton, Bethlehem, Forks, Wyomissing,
Northampton, Wilson, Nazareth, Palmerton, Bangor, Kutztown, Jim
Thorpe, Hamburg, Slatington, Fleetwood, Sinking Spring, Laureldale
and Pen Argyl.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds...frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
4065 7598 4074 7576 4091 7599 4101 7573
4105 7577 4108 7577 4102 7548 4097 7510
4083 7492 4057 7548 4025 7605 4049 7643
TIME...MOT...LOC 2117Z 019DEG 8KT 4061 7566 4036 7613 4086 7513
HAIL...0.75IN
WIND...60MPH
$$
amc661
WWUS51 KPHI 052132
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
532 PM EDT TUE SEP 5 2017
PAC025-089-052141-
/O.CAN.KPHI.SV.W.0193.000000T0000Z-170905T2145Z/
Carbon PA-Monroe PA-
532 PM EDT TUE SEP 5 2017
...THE SEVERE THUNDERSTORM WARNING FOR CARBON AND SOUTHWESTERN MONROE
COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
A severe thunderstorm watch remains in effect until 900 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.
LAT...LON 4042 7629 4081 7546 4094 7505 4083 7492
4057 7549 4025 7605 4039 7627
TIME...MOT...LOC 2131Z 236DEG 27KT 4031 7604 4054 7577 4079 7498
$$
NJC041-PAC011-077-095-052145-
/O.CON.KPHI.SV.W.0193.000000T0000Z-170905T2145Z/
Warren NJ-Berks PA-Lehigh PA-Northampton PA-
532 PM EDT TUE SEP 5 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL WARREN...CENTRAL BERKS...CENTRAL LEHIGH AND
NORTHAMPTON COUNTIES...
At 531 PM EDT, severe thunderstorms were located along a line
extending from Sinking Spring to Kutztown to Oxford, moving northeast
at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Allentown, Reading, Easton, Bethlehem, Forks, Wyomissing,
Northampton, Wilson, Nazareth, Bangor, Kutztown, Hamburg, Fleetwood,
Sinking Spring, Laureldale, Pen Argyl, Womelsdorf, Wind Gap, Bath and
Belvidere.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4042 7629 4081 7546 4094 7505 4083 7492
4057 7549 4025 7605 4039 7627
TIME...MOT...LOC 2131Z 236DEG 27KT 4031 7604 4054 7577 4079 7498
HAIL...0.75IN
WIND...60MPH
$$
JRK990
WWUS51 KPHI 052143
SVSPHI
Severe Weather Statement
National Weather Service MOUNT HOLLY NJ
543 PM EDT TUE SEP 5 2017
NJC041-PAC011-077-095-052150-
/O.EXP.KPHI.SV.W.0193.000000T0000Z-170905T2145Z/
Warren NJ-Berks PA-Lehigh PA-Northampton PA-
543 PM EDT TUE SEP 5 2017
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL WARREN...
NORTHERN BERKS...CENTRAL LEHIGH AND
NORTHAMPTON COUNTIES WILL EXPIRE AT 545 PM
EDT...
The storms which prompted the warning have weakened. Therefore, the
warning will be allowed to expire.
A severe thunderstorm watch remains in effect until 900 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.
Remember, a Severe Thunderstorm Warning still remains in effect for
central and southern Berks County until 615 PM EDT.
LAT...LON 4042 7629 4081 7546 4094 7505 4083 7492
4057 7549 4025 7605 4039 7627
TIME...MOT...LOC 2140Z 230DEG 32KT 4036 7597 4059 7570 4084 7491
$$
AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:59 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 31 min |
| Sep 5, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 52 min |
| Sep 5, 4:34 PM EDT | Areal Flood Advisory | PHI | Berks | 6 hr |
| Sep 5, 5:14 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 5, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 56 min |
| Sep 5, 5:22 PM EDT | Areal Flood Advisory | PHI | Northampton | 4 hr |
| Sep 5, 5:30 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 5, 5:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 41 min |
| Sep 5, 6:03 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 3 hr |
| Sep 5, 6:19 PM EDT | Special Weather Statement | PHI | Chester, Delaware | 41 min |
| Sep 5, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 49 min |
| Sep 5, 6:44 PM EDT | Special Weather Statement | PHI | Bucks | 31 min |
| Sep 5, 4:26 PM EDT | Special Weather Statement | PHI | Sussex | 34 min |
| Sep 5, 5:01 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 29 min |
| Sep 5, 5:43 PM EDT | Special Weather Statement | PHI | Morris | 47 min |
| Sep 5, 6:30 PM EDT | Special Weather Statement | PHI | Passaic | 15 min |
| Sep 5, 7:18 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Morris, Somerset | 27 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2017Severe Thunderstorm Warnings in New Jersey, 2017Every severe thunderstorm warning in 2017
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.