Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 80, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2018, 6:22 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 38 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
- Aug 17, 2018, 6:22 PM EDT (22:22 UTC)
- Expired
- Aug 17, 2018, 7:00 PM EDT
- In force
- 38 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 134 km from the middle of the area, began a volume at 22:22 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 |
|---|---|---|---|
| Aug 17, 6:30 PM EDT | TSTM WND DMG | Upper Mount Bethel Twp, PA | SEVERAL TREES DOWN IN UPPER MOUNT BETHEL TWP AND EAST BANGOR. TIME ESTIMATED FROM RADAR. |
| Aug 17, 6:34 PM EDT | TSTM WND DMG | Belvidere, NJ | REPORTS OF A FEW TREES AND LARGE BRANCHES DOWN IN BELVIDERE. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Aug 17, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.4 hours before the alert went out and 174 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
- 321 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1245 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
053
WUUS51 KPHI 172222
SVRPHI
NJC037-041-PAC089-095-172300-
/O.NEW.KPHI.SV.W.0080.180817T2222Z-180817T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
622 PM EDT FRI AUG 17 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Western Sussex County in northwestern New Jersey...
Northern Warren County in northwestern New Jersey...
Southeastern Monroe County in northeastern Pennsylvania...
Northeastern Northampton County in eastern Pennsylvania...
* Until 700 PM EDT.
* At 621 PM EDT, a severe thunderstorm was located over East Bangor,
or 14 miles north of Easton, moving northeast at 40 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Public. Several reports of wind damage have been received
from Northampton County during the past 20 minutes.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Newton, East Stroudsburg, Blairstown, Bangor, Belvidere, Hope, East
Bangor, Branchville, Andover, Stormville, Lake Mohawk, Werry Lake,
Greendell, Millbrook, Delaware Water Gap, Crandon Lakes,
Flatbrookville, Five Points, Columbia and Echo Lake.
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 4103 7458 4079 7514 4095 7532 4113 7507
4108 7503 4112 7495 4118 7488 4121 7486
4124 7486 4126 7484
TIME...MOT...LOC 2221Z 233DEG 33KT 4090 7519
HAIL...0.88IN
WIND...70MPH
$$
CMS2 follow-up statements
232
WWUS51 KPHI 172241
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
641 PM EDT FRI AUG 17 2018
PAC095-172250-
/O.CAN.KPHI.SV.W.0080.000000T0000Z-180817T2300Z/
Northampton PA-
641 PM EDT FRI AUG 17 2018
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORTHAMPTON
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 1100 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.
LAT...LON 4103 7458 4081 7510 4083 7508 4085 7510
4085 7507 4087 7505 4096 7513 4095 7518
4104 7520 4113 7507 4108 7503 4109 7500
4116 7490 4126 7484
TIME...MOT...LOC 2240Z 233DEG 33KT 4101 7500
$$
NJC037-041-PAC089-172300-
/O.CON.KPHI.SV.W.0080.000000T0000Z-180817T2300Z/
Sussex NJ-Warren NJ-Monroe PA-
641 PM EDT FRI AUG 17 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR WESTERN SUSSEX...NORTHERN WARREN AND EAST CENTRAL MONROE
COUNTIES...
At 640 PM EDT, a severe thunderstorm was located over Blairstown, or
13 miles west of Newton, moving northeast at 40 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated. This storm has a history of producing wind
damage across much of Northampton County.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Newton, East Stroudsburg, Blairstown, Belvidere, Hope, Branchville,
Andover, Flatbrookville, Lake Mohawk, Werry Lake, Greendell,
Millbrook, Delaware Water Gap, Five Points, Columbia, Crandon Lakes,
Echo Lake, Allamuchy-Panther Valley, Stroudsburg and Portland.
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 4103 7458 4081 7510 4083 7508 4085 7510
4085 7507 4087 7505 4096 7513 4095 7518
4104 7520 4113 7507 4108 7503 4109 7500
4116 7490 4126 7484
TIME...MOT...LOC 2240Z 233DEG 33KT 4101 7500
HAIL...0.75IN
WIND...70MPH
$$
CMS383
WWUS51 KPHI 172256
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
656 PM EDT FRI AUG 17 2018
NJC037-041-PAC089-172306-
/O.EXP.KPHI.SV.W.0080.000000T0000Z-180817T2300Z/
Sussex NJ-Warren NJ-Monroe PA-
656 PM EDT FRI AUG 17 2018
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SUSSEX...NORTHERN
WARREN AND EAST CENTRAL MONROE COUNTIES WILL EXPIRE AT 700 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A severe thunderstorm watch remains in effect until 1100 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
in Mount Holly NJ.
LAT...LON 4103 7458 4081 7510 4083 7508 4085 7510
4085 7507 4087 7505 4096 7513 4095 7518
4104 7520 4113 7507 4108 7503 4109 7500
4116 7490 4126 7484
TIME...MOT...LOC 2256Z 233DEG 33KT 4109 7486
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 2:21 PM EDT | Special Weather Statement | PHI | Lehigh | 24 min |
| Aug 17, 4:29 PM EDT | Special Weather Statement | PHI | Berks | 46 min |
| Aug 17, 5:07 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 53 min |
| Aug 17, 5:12 PM EDT | Special Weather Statement | PHI | Berks | 33 min |
| Aug 17, 5:36 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 39 min |
| Aug 17, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 31 min |
| Aug 17, 6:00 PM EDT | Special Weather Statement | PHI | Carbon | 30 min |
| Aug 17, 6:18 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Aug 17, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 41 min |
| Aug 17, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 52 min |
| Aug 17, 6:40 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Aug 17, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 51 min |
| Aug 17, 7:15 PM EDT | Special Weather Statement | PHI | Pike | 15 min |
| Aug 17, 7:34 PM EDT | Special Weather Statement | PHI | Carbon | 26 min |
| Aug 17, 7:39 PM EDT | Special Weather Statement | PHI | Monroe | 51 min |
| Aug 17, 7:42 PM EDT | Special Weather Statement | PHI | Bucks, Northampton | 33 min |
| Aug 17, 3:37 PM EDT | Special Weather Statement | PHI | Hunterdon | 38 min |
| Aug 17, 3:42 PM EDT | Special Weather Statement | PHI | Warren | 48 min |
| Aug 17, 5:46 PM EDT | Special Weather Statement | PHI | Morris | 14 min |
| Aug 17, 6:02 PM EDT | Special Weather Statement | PHI | Morris | 13 min |
| Aug 17, 6:59 PM EDT | Special Weather Statement | PHI | Sussex | 31 min |
| Aug 17, 7:28 PM EDT | Special Weather Statement | PHI | Sussex | 17 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; radar from the NEXRAD Level II archive.