Alert archive / Pennsylvania / Flash Flood Warnings in 2019
Flash Flood Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 18, 2019, 3:57 PM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 4 hr. 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
- Jun 18, 2019, 3:57 PM EDT (19:57 UTC)
- Expired
- Jun 18, 2019, 8:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 19:57 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 |
|---|---|---|---|
| Jun 18, 4:34 PM EDT | FLOOD | 2 Nnw Hampton, NJ | STREET FLOODING REPORTED ON RYMON ROAD IN WASHINGTON TWP. |
| Jun 18, 6:08 PM EDT | HEAVY RAIN 2.29 | Stewartsville, NJ | SINCE MIDNIGHT. |
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, 8.0 hours before the alert went out and 192 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
- 78 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 453 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
082 WGUS51 KPHI 181957 FFWPHI NJC019-041-PAC017-077-095-190000- /O.NEW.KPHI.FF.W.0020.190618T1957Z-190619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Mount Holly NJ 357 PM EDT Tue Jun 18 2019 The National Weather Service in Mount Holly NJ has issued a * Flash Flood Warning for... Northwestern Hunterdon County in northwestern New Jersey... Southwestern Warren County in northwestern New Jersey... East central Lehigh County in eastern Pennsylvania... Northwestern Bucks County in southeastern Pennsylvania... Southeastern Northampton County in eastern Pennsylvania... * Until 800 PM EDT. * At 355 PM EDT, Doppler radar indicated heavy rain across the warned area. Up to two inches of rain fell with earlier storms. Flash flooding is expected to begin shortly in the areas of heaviest rain. * Some locations that could experience flooding include... Allentown, Easton, Bethlehem, Wilson, Hellertown, Clinton, Alpha, Glen Gardner, Ferndale, Hampton, West Easton, Milford, Bloomsbury, Riegelsville, Glendon, Pleasant Valley, Springtown, Old Orchard, Lehigh University and Phillipsburg. Additional rainfall amounts of up to one inch are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4076 7493 4058 7492 4049 7540 4063 7544 $$ SFJ
3 follow-up statements
015 WGUS71 KPHI 182104 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 504 PM EDT Tue Jun 18 2019 NJC019-041-PAC017-077-095-190000- /O.CON.KPHI.FF.W.0020.000000T0000Z-190619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hunterdon NJ-Warren NJ-Lehigh PA-Bucks PA-Northampton PA- 504 PM EDT Tue Jun 18 2019 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTHWESTERN HUNTERDON...SOUTHWESTERN WARREN...EAST CENTRAL LEHIGH... NORTHWESTERN BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES... At 503 PM EDT, Doppler radar indicated another round of thunderstorms producing heavy rain crossing the warned area. Flash flooding is expected to begin shortly. Some locations that could experience flooding include... Allentown, Easton, Bethlehem, Wilson, Hellertown, Clinton, Alpha, Glen Gardner, Ferndale, Hampton, West Easton, Milford, Bloomsbury, Riegelsville, Glendon, Pleasant Valley, Springtown, Old Orchard, Lehigh University and Phillipsburg. Additional rainfall amounts of one to two inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4076 7493 4058 7492 4049 7540 4063 7544 $$ SFJ
043 WGUS71 KPHI 182217 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 617 PM EDT Tue Jun 18 2019 NJC019-041-PAC017-077-095-190000- /O.CON.KPHI.FF.W.0020.000000T0000Z-190619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hunterdon NJ-Warren NJ-Lehigh PA-Bucks PA-Northampton PA- 617 PM EDT Tue Jun 18 2019 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTHWESTERN HUNTERDON...SOUTHWESTERN WARREN...EAST CENTRAL LEHIGH... NORTHWESTERN BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES... At 616 PM EDT, Doppler radar indicated the heavy rain had left the warned area. However, it will take time for water to recede. Therefore the threat for flash flooding continues. Up to three inches of rain have already fallen. Some locations that could experience flooding include... Allentown, Easton, Bethlehem, Wilson, Hellertown, Clinton, Alpha, Glen Gardner, Ferndale, Hampton, West Easton, Milford, Bloomsbury, Riegelsville, Glendon, Pleasant Valley, Springtown, Old Orchard, Lehigh University and Phillipsburg. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4076 7493 4058 7492 4049 7540 4063 7544 $$ SFJ
137 WGUS71 KPHI 182351 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 751 PM EDT Tue Jun 18 2019 NJC019-041-PAC017-077-095-190000- /O.EXP.KPHI.FF.W.0020.000000T0000Z-190619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hunterdon NJ-Warren NJ-Lehigh PA-Bucks PA-Northampton PA- 751 PM EDT Tue Jun 18 2019 ...THE FLASH FLOOD WARNING FOR NORTHWESTERN HUNTERDON...SOUTHWESTERN WARREN...EAST CENTRAL LEHIGH...NORTHWESTERN BUCKS AND SOUTHEASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT 800 PM EDT... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4076 7493 4058 7492 4049 7540 4063 7544 $$ SFJ
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 10:28 PM EDT | Special Marine Warning | PHI | 32 min | |
| Jun 18, 11:07 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 4 hr |
| Jun 18, 12:38 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 7 hr |
| Jun 18, 1:51 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Somerset | 4 hr |
| Jun 18, 2:06 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Somerset | 54 min |
| Jun 18, 2:11 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Jun 18, 2:35 PM EDT | Special Marine Warning | PHI | 70 min | |
| Jun 18, 2:36 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 3 hr |
| Jun 18, 3:26 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Jun 18, 3:41 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 4 hr |
| Jun 18, 4:25 PM EDT | Special Weather Statement | PHI | Mercer | 35 min |
| Jun 18, 5:00 PM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Monmouth, Ocean | 67 min |
| Jun 18, 6:39 PM EDT | Areal Flood Warning | PHI | Hunterdon, Somerset | 4 hr |
| Jun 18, 7:24 PM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Jun 18, 5:09 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2019Flash Flood Warnings in New Jersey, 2019Every 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.