Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 182, NWS Philadelphia/Mount Holly

August 22, 2017Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 22, 2017, 8:12 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 48 min. 3 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 22, 2017, 8:12 PM EDT (00:12 UTC)
Expired: Aug 22, 2017, 9:00 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
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), 130 km from the middle of the area, began a volume at 00:13 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 22, 8:13 PM EDT	TSTM WND DMG	Gilbert, PA	TREES REPORTED DOWN NEAR THE WEST END FAIRGROUNDS IN GILBERT. TIME ESTIMATED FROM RADAR
Aug 22, 8:30 PM EDT	TSTM WND DMG	Bartonsville, PA	TREES DOWN IN SEVERAL LOCATIONS IN MONROE COUNTY. TIME ESTIMATED FROM RADAR.
Aug 22, 9:09 PM EDT	TSTM WND DMG	Upper Mount Bethel Twp, PA	TREES REPORTED DOWN. TIME ESTIMATED BY 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 22, 4:19 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 181 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1278 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

733 
WUUS51 KPHI 230012
SVRPHI
NJC037-041-PAC089-095-230100-
/O.NEW.KPHI.SV.W.0182.170823T0012Z-170823T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
812 PM EDT TUE AUG 22 2017

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...
  Southeastern Monroe County in northeastern Pennsylvania...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 900 PM EDT

* At 812 PM EDT, a severe thunderstorm was located over
  Brodheadsville, or 13 miles south of Mount Pocono, moving east at
  40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect damage to 
           trees and power lines. 

* Locations impacted include...
  Newton, East Stroudsburg, Blairstown, Branchville, Andover,
  Stormville, Brodheadsville, Werry Lake, Gilbert, Greendell,
  Millbrook, Delaware Water Gap, Crandon Lakes, Flatbrookville,
  Saylorsburg, Five Points, Columbia, Echo Lake, Stroudsburg and
  Portland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4095 7469 4087 7544 4096 7547 4110 7505
      4108 7503 4113 7494 4119 7476
TIME...MOT...LOC 0012Z 254DEG 35KT 4092 7539 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

MWG

1 follow-up statement

457 
WWUS51 KPHI 230037 RRA
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
837 PM EDT TUE AUG 22 2017

NJC037-041-PAC089-095-230100-
/O.CON.KPHI.SV.W.0182.000000T0000Z-170823T0100Z/
Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
837 PM EDT TUE AUG 22 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHWESTERN SUSSEX...NORTHERN WARREN...EAST CENTRAL MONROE AND
NORTHEASTERN NORTHAMPTON COUNTIES...

At 837 PM EDT, a severe thunderstorm was located near Delaware Water
Gap, or 17 miles southeast of Mount Pocono, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect damage to 
         trees and power lines. 

Locations impacted include...
Newton, East Stroudsburg, Blairstown, Branchville, Andover,
Flatbrookville, Stormville, Werry Lake, Greendell, Millbrook,
Delaware Water Gap, Five Points, Columbia, Crandon Lakes, Echo Lake,
Stroudsburg, Portland, Arlington Heights, Shawnee and Marshalls
Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4095 7469 4091 7521 4100 7536 4110 7505
      4108 7503 4113 7494 4119 7476
TIME...MOT...LOC 0037Z 254DEG 35KT 4099 7508 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

MWG

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 8:15 PM EDT	Tornado Warning	PHI	Monroe, Northampton	30 min
Aug 22, 8:45 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more	60 min
Aug 22, 8:58 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	24 min
Aug 22, 9:18 PM EDT	Areal Flood Advisory	PHI	Berks, Montgomery	4 hr
Aug 22, 9:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	52 min
Aug 22, 9:40 PM EDT	Tornado Warning	PHI	Berks, Chester, Montgomery	20 min
Aug 22, 9:42 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	48 min
Aug 22, 10:07 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia	53 min
Aug 22, 10:27 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	48 min
Aug 22, 10:37 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	4 hr
Aug 22, 10:40 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Aug 22, 10:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	62 min
Aug 22, 11:46 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	44 min
Aug 23, 12:06 AM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	4 hr
Aug 23, 12:29 AM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	46 min
Aug 23, 4:02 AM EDT	Areal Flood Warning	PHI	Chester, Delaware, Philadelphia	4 hr
Aug 22, 8:20 PM EDT	Special Weather Statement	PHI	Sussex	40 min
Aug 22, 10:13 PM EDT	Special Marine Warning	PHI		92 min
Aug 22, 11:39 PM EDT	Special Marine Warning	PHI		66 min
Aug 22, 11:42 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr
Aug 23, 12:37 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 1 more	4 hr
Aug 23, 1:56 AM EDT	Areal Flood Advisory	PHI	Salem	4 hr
Aug 23, 2:43 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more	4 hr
Aug 23, 3:37 AM EDT	Areal Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017 Severe Thunderstorm Warnings in New Jersey, 2017 Every 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.