Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2018, 5:59 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 31 min. 9 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, 5:59 PM EDT (21:59 UTC)
- Expired
- Aug 17, 2018, 6:30 PM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties 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 21:59 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, 6:00 PM EDT | TSTM WND DMG | Bath, PA | TWO TREES DOWNED. |
| Aug 17, 6:00 PM EDT | TSTM WND DMG | Moore Twp, PA | SEVERAL REPORTS OF DOWNED TREES AND POWER LINES IN MOORE TWP...ALLEN TWP...AND CHAPMAN. TIME ESTIMATED FROM RADAR. |
| Aug 17, 6:00 PM EDT | TSTM WND GST 62 | Bath, PA | |
| Aug 17, 6:03 PM EDT | TSTM WND DMG | Bushkill Twp, PA | MULTIPLE REPORTS OF TREES AND WIRES DOWN IN BUSHKILL TOWNSHIP |
| Aug 17, 6:03 PM EDT | TSTM WND DMG | Ross Common, PA | TREES DOWNED IN WIRES. TIME ESTIMATED FROM RADAR. |
| Aug 17, 6:11 PM EDT | TSTM WND DMG | 1 Ese Ross Common, PA | DOWNED UTILITY ON BROADWAY STREET BETWEEN THE MONROE COUNTY LINE AND ROUTE 33 NORTH. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR. |
| Aug 17, 6:18 PM EDT | TSTM WND DMG | 1 Wnw Harmony, NJ | SEVERAL REPORTS OF TREE DAMAGE NEAR AND NORTHWEST OF HARMONY NEAR THE DELAWARE RIVER. TIME ESTIMATED FROM RADAR. |
| 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, 10.0 hours before the alert went out and 211 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.
233
WUUS51 KPHI 172159
SVRPHI
NJC041-PAC089-095-172230-
/O.NEW.KPHI.SV.W.0078.180817T2159Z-180817T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
559 PM EDT FRI AUG 17 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central Warren County in northwestern New Jersey...
South central Monroe County in northeastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 630 PM EDT.
* At 558 PM EDT, a severe thunderstorm was located over Bath, or 9
miles northwest of Easton, moving northeast at 40 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...
Bethlehem, Northampton, East Stroudsburg, Nazareth, Bangor, Pen
Argyl, Wind Gap, Bath, Belvidere, Oxford, Belfast, Tatamy, East
Bangor, Steuben, Stormville, Rossland, Saylorsburg, Roxburg,
Beersville and Stroudsburg.
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 4081 7501 4064 7540 4067 7543 4067 7546
4072 7552 4074 7553 4073 7554 4075 7557
4102 7521
TIME...MOT...LOC 2158Z 233DEG 34KT 4076 7538
HAIL...0.75IN
WIND...60MPH
$$
CMS2 follow-up statements
831
WWUS51 KPHI 172212
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
612 PM EDT FRI AUG 17 2018
NJC041-PAC089-095-172230-
/O.CON.KPHI.SV.W.0078.000000T0000Z-180817T2230Z/
Warren NJ-Monroe PA-Northampton PA-
612 PM EDT FRI AUG 17 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR WEST CENTRAL WARREN...SOUTH CENTRAL MONROE AND NORTHEASTERN
NORTHAMPTON COUNTIES...
At 610 PM EDT, a severe thunderstorm was located over Wind Gap, or 10
miles north of Easton, moving northeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Trained weather spotters. Wind gusts to 62 mph were
reported in Bath around 6 pm as this storm passed, with
trees reported down as well.
IMPACT...Damage to roofs, siding, trees, and power lines is
likely.
Locations impacted include...
Bethlehem, East Stroudsburg, Nazareth, Bangor, Pen Argyl, Wind Gap,
Bath, Belvidere, Oxford, Belfast, Tatamy, East Bangor, Steuben,
Stormville, Saylorsburg, Rossland, Roxburg, Stroudsburg, Roseto and
Stockertown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4081 7501 4066 7536 4084 7544 4102 7521
TIME...MOT...LOC 2210Z 233DEG 34KT 4083 7525
HAIL...0.75IN
WIND...60MPH
$$
CMS545
WWUS51 KPHI 172226
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
626 PM EDT FRI AUG 17 2018
NJC041-PAC089-095-172235-
/O.EXP.KPHI.SV.W.0078.000000T0000Z-180817T2230Z/
Warren NJ-Monroe PA-Northampton PA-
626 PM EDT FRI AUG 17 2018
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL WARREN...SOUTH
CENTRAL MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT
630 PM EDT...
A new severe thunderstorm warning has been issued for far northeast
Monroe, northern Warren, and southeastern Monroe Counties until 7 pm.
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 4081 7501 4066 7536 4084 7544 4102 7521
TIME...MOT...LOC 2225Z 233DEG 34KT 4090 7512
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 38 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 |
| Aug 17, 7:42 PM EDT | Special Weather Statement | PHI | Hunterdon, Warren | 33 min |
| 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, 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 |
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.