Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 50, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2018, 3:40 PM EDT for Berks County, Lehigh County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 50 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
- Jul 4, 2018, 3:40 PM EDT (19:40 UTC)
- Expired
- Jul 4, 2018, 4:30 PM EDT
- In force
- 50 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, Lehigh County, PA, Northampton County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 4, 3:50 PM EDT | TSTM WND DMG | Easton, PA | SEVERAL REPORTS OF TREES DOWN IN EASTON...INCLUDING ON NORTH DELAWARE DRIVE...RIVER ROAD...AND ON FRUTCHEY HILL ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 4, 3:55 PM EDT | TSTM WND DMG | Crossroads, PA | NUMEROUS REPORTS OF TREES AND WIRES DOWN ACROSS THE AREA. 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 12:00Z, 7.7 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
- 145 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 1091 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
383
WUUS51 KPHI 041940
SVRPHI
NJC041-PAC011-077-095-042030-
/O.NEW.KPHI.SV.W.0050.180704T1940Z-180704T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
340 PM EDT WED JUL 4 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Warren County in northwestern New Jersey...
Northeastern Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 430 PM EDT.
* At 339 PM EDT, severe thunderstorms were located along a line
extending from Harmony to near Lenhartsville, moving west at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Hellertown, Nazareth, Bangor, Kutztown, Slatington, Pen Argyl, Wind
Gap, Bath, Belvidere, Harmony, Alpha, Walnutport and Topton.
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 4065 7598 4070 7583 4077 7570 4081 7554
4083 7538 4086 7529 4092 7522 4096 7510
4069 7503 4059 7518 4061 7520 4052 7536
4045 7570 4059 7601
TIME...MOT...LOC 1939Z 075DEG 6KT 4075 7513 4059 7581
HAIL...0.75IN
WIND...60MPH
$$
CMS2 follow-up statements
050
WWUS51 KPHI 042012
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
412 PM EDT WED JUL 4 2018
NJC041-PAC011-077-095-042030-
/O.CON.KPHI.SV.W.0050.000000T0000Z-180704T2030Z/
Warren NJ-Berks PA-Lehigh PA-Northampton PA-
412 PM EDT WED JUL 4 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHWESTERN WARREN...NORTHEASTERN BERKS...LEHIGH AND NORTHAMPTON
COUNTIES...
At 411 PM EDT, severe thunderstorms were located along a line
extending from near Harmony to Lenhartsville, moving west at 5 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated. Several reports of wind damage have been
received from Northampton County.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Hellertown, Nazareth, Kutztown, Slatington, Wind Gap, Bath,
Walnutport, Topton, Belfast, West Easton, Tatamy, Riegelsville and
Steuben.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4065 7598 4070 7583 4077 7570 4081 7554
4083 7538 4086 7529 4077 7517 4059 7518
4061 7520 4052 7536 4045 7570 4059 7601
TIME...MOT...LOC 2011Z 075DEG 6KT 4074 7519 4058 7587
HAIL...0.75IN
WIND...60MPH
$$
CMS610
WWUS51 KPHI 042026
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
426 PM EDT WED JUL 4 2018
NJC041-PAC011-077-095-042035-
/O.EXP.KPHI.SV.W.0050.000000T0000Z-180704T2030Z/
Warren NJ-Berks PA-Lehigh PA-Northampton PA-
426 PM EDT WED JUL 4 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WARREN...
NORTHEASTERN BERKS...LEHIGH AND NORTHAMPTON COUNTIES WILL EXPIRE AT
430 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.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
in Mount Holly NJ.
LAT...LON 4065 7598 4070 7583 4077 7570 4081 7554
4083 7538 4086 7529 4077 7517 4059 7518
4061 7520 4052 7536 4045 7570 4059 7601
TIME...MOT...LOC 2025Z 075DEG 6KT 4074 7521 4057 7589
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 9:33 AM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 98 min |
| Jul 4, 2:55 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| Jul 4, 3:09 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 4 hr |
| Jul 4, 3:22 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 4 hr |
| Jul 4, 3:32 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 28 min |
| Jul 4, 3:56 PM EDT | Special Weather Statement | PHI | Lebanon | 34 min |
| Jul 4, 3:59 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 4 hr |
| Jul 4, 4:20 PM EDT | Special Weather Statement | PHI | Carbon | 25 min |
| Jul 4, 4:25 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 4 hr |
| Jul 4, 4:28 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Jul 4, 4:28 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 32 min |
| Jul 4, 4:34 PM EDT | Special Weather Statement | PHI | Berks | 56 min |
| Jul 4, 4:56 PM EDT | Special Weather Statement | PHI | Carbon | 49 min |
| Jul 4, 5:46 PM EDT | Special Weather Statement | PHI | Berks | 29 min |
| Jul 4, 6:13 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 32 min |
| Jul 4, 6:15 PM EDT | Special Weather Statement | PHI | Berks | 45 min |
| Jul 4, 6:20 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 4, 6:32 PM EDT | Special Weather Statement | PHI | Chester | 28 min |
| Jul 4, 7:00 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery, Philadelphia | 30 min |
| Jul 4, 7:07 PM EDT | Special Weather Statement | PHI | Lebanon | 23 min |
| Jul 4, 7:13 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 3 hr |
| Jul 4, 7:18 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 4, 7:32 PM EDT | Special Weather Statement | PHI | Montgomery | 43 min |
| Jul 4, 9:35 AM EDT | Areal Flood Advisory | PHI | Sussex | 100 min |
| Jul 4, 12:15 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Jul 4, 12:53 PM EDT | Special Weather Statement | PHI | Sussex | 22 min |
| Jul 4, 1:11 PM EDT | Special Weather Statement | PHI | Sussex | 34 min |
| Jul 4, 1:22 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 3 hr |
| Jul 4, 1:44 PM EDT | Special Weather Statement | PHI | Sussex | 31 min |
| Jul 4, 1:48 PM EDT | Special Weather Statement | PHI | Warren | 27 min |
| Jul 4, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Warren | 48 min |
| Jul 4, 2:02 PM EDT | Special Weather Statement | PHI | Sussex | 28 min |
| Jul 4, 2:15 PM EDT | Areal Flood Advisory | PHI | Warren | 3 hr |
| Jul 4, 2:18 PM EDT | Special Weather Statement | PHI | Warren | 27 min |
| Jul 4, 2:31 PM EDT | Special Weather Statement | PHI | Warren | 44 min |
| Jul 4, 2:48 PM EDT | Areal Flood Advisory | PHI | Morris | 3 hr |
| Jul 4, 3:12 PM EDT | Special Weather Statement | PHI | Warren | 33 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2018Severe Thunderstorm Warnings in New Jersey, 2018Every severe thunderstorm warning in 2018
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.