Alert archive / New Jersey / Flash Flood Warnings in 2019

Flash Flood Warning 73, NWS Philadelphia/Mount Holly

July 31, 2019Monroe County, Pennsylvania; Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 31, 2019, 4:58 PM EDT for Monroe County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 4 hr. 1 report 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 31, 2019, 4:58 PM EDT (20:58 UTC)
Expired: Jul 31, 2019, 9:00 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 21:02 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
Jul 31, 5:35 PM EDT	FLASH FLOOD	East Stroudsburg, PA	MULTIPLE ROADS CLOSED DUE TO FLOODING IN EAST STROUDSBURG. SEVERAL VEHICLES STRANDED BUT NO WATER RESCUES REQUIRED.

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, 9.0 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: 885 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1207 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

817 
WGUS51 KPHI 312058
FFWPHI
NJC037-041-PAC089-010100-
/O.NEW.KPHI.FF.W.0073.190731T2058Z-190801T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
458 PM EDT Wed Jul 31 2019

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Southwestern Sussex County in northwestern New Jersey...
  Northern Warren County in northwestern New Jersey...
  East central Monroe County in northeastern Pennsylvania...

* Until 900 PM EDT.

* At 458 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly in the
  areas of heaviest rain.

* Some locations that could experience flooding include...
  Newton, East Stroudsburg, Blairstown, Branchville, Andover,
  Flatbrookville, Stormville, Henryville, Lake Mohawk, Werry Lake,
  Analomink, Millbrook, Delaware Water Gap, Alpine Mountain, Five
  Points, Pellettown, Crandon Lakes, Echo Lake, Stroudsburg and
  Arlington Heights.

LAT...LON 4101 7464 4094 7503 4094 7511 4096 7513
      4094 7518 4094 7528 4114 7526 4115 7515
      4114 7509 4108 7503 4112 7495 4119 7488
      4121 7467

$$

NC

1 follow-up statement

923 
WGUS71 KPHI 312240
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
640 PM EDT Wed Jul 31 2019

NJC037-312249-
/O.CAN.KPHI.FF.W.0073.000000T0000Z-190801T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
640 PM EDT Wed Jul 31 2019

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN SUSSEX COUNTY IS
CANCELLED...

Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.

LAT...LON 4108 7503 4110 7497 4100 7486 4094 7503
      4094 7511 4096 7513 4094 7518 4094 7528
      4111 7523 4114 7509

$$

NJC041-PAC089-010100-
/O.CON.KPHI.FF.W.0073.000000T0000Z-190801T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Monroe PA-
640 PM EDT Wed Jul 31 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR
NORTHWESTERN WARREN AND EAST CENTRAL MONROE COUNTIES...

At 639 PM EDT, local law enforcement reported flash flooding with 
several road closures in East Stroudsburg. This was due to 2 inches 
of rain which fell previously

Some locations that could experience flooding include...
East Stroudsburg, Blairstown, Stormville, Werry Lake, Analomink,
Millbrook, Delaware Water Gap, Echo Lake, Alpine Mountain,
Stroudsburg, Arlington Heights, Shawnee, Marshalls Creek and Hidden
Lake.

LAT...LON 4108 7503 4110 7497 4100 7486 4094 7503
      4094 7511 4096 7513 4094 7518 4094 7528
      4111 7523 4114 7509

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:45 PM EDT	Special Weather Statement	PHI	Berks	45 min
Jul 30, 11:38 PM EDT	Special Weather Statement	PHI	Lehigh	52 min
Jul 31, 12:06 AM EDT	Special Weather Statement	PHI	Carbon	39 min
Jul 31, 3:28 AM EDT	Flash Flood Watch	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	17 hr
Jul 31, 1:02 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	28 min
Jul 31, 1:14 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	3 hr
Jul 31, 1:19 PM EDT	Flash Flood Warning	PHI	Bucks, Delaware, Philadelphia	5 hr
Jul 31, 1:30 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	45 min
Jul 31, 1:46 PM EDT	Flash Flood Warning	PHI	Bucks	3 hr
Jul 31, 2:11 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Jul 31, 2:27 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	3 hr
Jul 31, 2:32 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	3 hr
Jul 31, 2:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	44 min
Jul 31, 3:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	51 min
Jul 31, 3:49 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	41 min
Jul 31, 4:36 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	4 hr
Jul 31, 4:52 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	38 min
Jul 31, 1:43 PM EDT	Special Marine Warning	PHI		62 min
Jul 31, 1:49 PM EDT	Special Marine Warning	PHI		86 min
Jul 31, 1:57 PM EDT	Special Weather Statement	PHI	Ocean	33 min
Jul 31, 2:21 PM EDT	Areal Flood Advisory	PHI	Ocean	4 hr
Jul 31, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	52 min
Jul 31, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	46 min
Jul 31, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Jul 31, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	52 min
Jul 31, 3:00 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Jul 31, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	40 min
Jul 31, 3:06 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	40 min
Jul 31, 3:24 PM EDT	Flash Flood Warning	PHI	Monmouth	4 hr
Jul 31, 3:39 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	4 hr
Jul 31, 3:39 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	51 min
Jul 31, 3:48 PM EDT	Flash Flood Warning	PHI	Ocean	2 hr
Jul 31, 3:51 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	17 min
Jul 31, 5:02 PM EDT	Special Weather Statement	PHI	Atlantic	28 min
Jul 31, 5:16 PM EDT	Special Weather Statement	PHI	Atlantic	44 min
Jul 31, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cumberland, Ocean, Salem	48 min
Jul 31, 5:41 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	3 hr
Jul 31, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	25 min
Jul 31, 5:51 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	35 min
Jul 31, 5:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 31, 6:05 PM EDT	Special Marine Warning	PHI		55 min
Jul 31, 6:41 PM EDT	Special Marine Warning	PHI		64 min
Jul 31, 6:53 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 7:36 PM EDT	Special Marine Warning	PHI		54 min

Nearby

Flash Flood Warnings in New Jersey, 2019 Flash Flood Warnings in Pennsylvania, 2019 Every flash flood warning in 2019

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.