Alert archive / Pennsylvania / Flash Flood Warnings in 2024
Flash Flood Warning 60, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 18, 2024, 4:56 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 6 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
- Aug 18, 2024, 4:56 PM EDT (20:56 UTC)
- Expired
- Aug 18, 2024, 11:15 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 128 km from the middle of the area, began a volume at 20:56 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 18, 5:30 PM EDT | FLASH FLOOD | Blairstown Twp, NJ | Multiple reports of flooding in the Blairstown area. Time estimated from radar. |
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, 8.9 hours before the alert went out and 187 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
- 109 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 582 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
949
WGUS51 KPHI 182056
FFWPHI
NJC041-PAC089-095-190100-
/O.NEW.KPHI.FF.W.0060.240818T2056Z-240819T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
456 PM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Central Warren County in northwestern New Jersey...
Northeastern Northampton County in eastern Pennsylvania...
Southeastern Monroe County in northeastern Pennsylvania...
* Until 900 PM EDT.
* At 456 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. Additional rainfall amounts of 0.5 to 2 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
East Stroudsburg, Blairstown, Bangor, Pen Argyl, Wind Gap,
Belvidere, Harmony, Oxford, Hope, Belfast, Tatamy and East Bangor.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 13.
Interstate 80 in Pennsylvania between mile markers 306 and 314.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4107 7521 4111 7506 4109 7504 4108 7503
4109 7500 4109 7499 4109 7497 4104 7494
4095 7491 4087 7497 4078 7502 4073 7515
4072 7525 4085 7533 4098 7532
FLASH FLOOD...RADAR INDICATED
$$
Hoeflich4 follow-up statements
171
WGUS71 KPHI 182250
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
650 PM EDT Sun Aug 18 2024
NJC041-PAC089-095-190100-
/O.CON.KPHI.FF.W.0060.000000T0000Z-240819T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Monroe PA-Northampton PA-
650 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING
FOR CENTRAL WARREN, NORTHEASTERN NORTHAMPTON AND SOUTHEASTERN MONROE
COUNTIES...
At 650 PM EDT, emergency management reported thunderstorms producing
heavy rain in around Blairstown, NJ. Between 2.5 and 4 inches of
rain have fallen. Additional rainfall amounts up to 1 inch are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
East Stroudsburg, Blairstown, Bangor, Pen Argyl, Wind Gap,
Belvidere, Harmony, Oxford, Hope, Belfast, Tatamy and East Bangor.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 13.
Interstate 80 in Pennsylvania between mile markers 306 and 314.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4107 7521 4111 7506 4109 7504 4108 7503
4109 7500 4109 7499 4109 7497 4104 7494
4095 7491 4087 7497 4078 7502 4073 7515
4072 7525 4085 7533 4098 7532
FLASH FLOOD...OBSERVED
$$
Hoeflich879
WGUS51 KPHI 190037
FFWPHI
NJC041-PAC089-095-190315-
/O.EXT.KPHI.FF.W.0060.000000T0000Z-240819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
837 PM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
Central Warren County in northwestern New Jersey...
Northeastern Northampton County in eastern Pennsylvania...
Southeastern Monroe County in northeastern Pennsylvania...
* Until 1115 PM EDT.
* At 837 PM EDT, emergency management reported flooding around
Blairstown, NJ and other cities within Warren County. Between 2.5
and 4 inches of rain have fallen. Additional rainfall amounts of 1
to 2 inches are possible in the warned area as another round of
heavy rain moves in. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
East Stroudsburg, Blairstown, Bangor, Pen Argyl, Wind Gap,
Belvidere, Harmony, Oxford, Hope, Belfast, Tatamy and East Bangor.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 13.
Interstate 80 in Pennsylvania between mile markers 306 and 314.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4107 7521 4111 7506 4109 7504 4108 7503
4109 7500 4109 7499 4109 7497 4104 7494
4095 7491 4087 7497 4078 7502 4073 7515
4072 7525 4085 7533 4098 7532
FLASH FLOOD...OBSERVED
$$
Hoeflich521
WGUS71 KPHI 190134
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
934 PM EDT Sun Aug 18 2024
PAC089-190144-
/O.CAN.KPHI.FF.W.0060.000000T0000Z-240819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monroe PA-
934 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MONROE COUNTY...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flood Watch remains in effect until 200 AM EDT for portions of
northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4086 7529 4090 7523 4091 7524 4093 7521
4096 7513 4097 7512 4097 7513 4099 7513
4103 7504 4104 7503 4107 7501 4109 7497
4104 7494 4095 7491 4087 7497 4078 7502
4073 7515 4072 7525 4085 7533
$$
NJC041-PAC095-190315-
/O.CON.KPHI.FF.W.0060.000000T0000Z-240819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Northampton PA-
934 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT THIS
EVENING FOR CENTRAL WARREN AND NORTHEASTERN NORTHAMPTON COUNTIES...
At 934 PM EDT, emergency management reported thunderstorms producing
heavy rain with flooding around Blairstown, NJ . Between 2.5 and 4
inches of rain have fallen. Additional rainfall amounts of 1 to 2
inches are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Blairstown, Bangor, Pen Argyl, Wind Gap, Belvidere, Harmony,
Oxford, Hope, Belfast, Tatamy, East Bangor and Delaware Water Gap.
This includes Interstate 80 in New Jersey between mile markers 1 and
13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4086 7529 4090 7523 4091 7524 4093 7521
4096 7513 4097 7512 4097 7513 4099 7513
4103 7504 4104 7503 4107 7501 4109 7497
4104 7494 4095 7491 4087 7497 4078 7502
4073 7515 4072 7525 4085 7533
FLASH FLOOD...OBSERVED
$$
Hoeflich955
WGUS71 KPHI 190305
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1105 PM EDT Sun Aug 18 2024
NJC041-PAC095-190315-
/O.EXP.KPHI.FF.W.0060.000000T0000Z-240819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Northampton PA-
1105 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING WILL EXPIRE AT 1115 PM EDT THIS EVENING FOR
CENTRAL WARREN AND NORTHEASTERN NORTHAMPTON COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 200 AM EDT for portions of
northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4086 7529 4090 7523 4091 7524 4093 7521
4096 7513 4097 7512 4097 7513 4099 7513
4103 7504 4104 7503 4107 7501 4109 7497
4104 7494 4095 7491 4087 7497 4078 7502
4073 7515 4072 7525 4085 7533
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Burlington, Camden | 93 min |
| Aug 18, 4:41 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Mercer | 2 hr |
| Aug 18, 2:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Aug 18, 2:42 PM EDT | Special Marine Warning | PHI | 93 min | |
| Aug 18, 3:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 18, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 41 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 34 min |
| Aug 18, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 29 min |
| Aug 18, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 6 hr |
| Aug 18, 5:38 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 4 hr |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 43 min |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth | 58 min |
| Aug 18, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 24 min |
| Aug 18, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 18 min |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Aug 18, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 66 min |
| Aug 18, 6:36 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 5 hr |
| Aug 18, 1:35 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 18, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 19 min |
| Aug 18, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 41 min |
| Aug 18, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 42 min |
| Aug 18, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 28 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2024Flash Flood Warnings in New Jersey, 2024Every flash flood warning in 2024
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.