Alert archive / Pennsylvania / Flash Flood Warnings in 2024
Flash Flood Warning 53, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 9, 2024, 3:31 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 108 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2024, 3:31 PM EDT (19:31 UTC)
- Expired
- Aug 9, 2024, 5:19 PM EDT
- In force
- 108 min
- 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), 139 km from the middle of the area, began a volume at 19:35 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.5 hours before the alert went out and 195 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
- 988 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 536 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 13.0
The text
As transmitted.
676
WGUS51 KPHI 091931
FFWPHI
NJC041-PAC089-095-092330-
/O.NEW.KPHI.FF.W.0053.240809T1931Z-240809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
331 PM EDT Fri Aug 9 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Warren County in northwestern New Jersey...
Northern Northampton County in eastern Pennsylvania...
Eastern Monroe County in northeastern Pennsylvania...
* Until 730 PM EDT.
* At 331 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 1 inch of rain has
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
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, Delaware Water Gap, Analomink, Henryville,
Alpine Mountain, Paradise Valley, Stormville, Tannersville, Echo
Lake, Mountainhome and Canadensis.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 3.
Interstate 80 in Pennsylvania between mile markers 302 and 314.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4096 7532 4104 7532 4125 7526 4125 7513
4115 7516 4114 7508 4109 7504 4108 7503
4108 7501 4093 7511 4090 7515 4089 7527
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MJL2 follow-up statements
944
WGUS71 KPHI 092050
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
450 PM EDT Fri Aug 9 2024
NJC041-PAC089-095-092330-
/O.CON.KPHI.FF.W.0053.000000T0000Z-240809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Monroe PA-Northampton PA-
450 PM EDT Fri Aug 9 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT THIS
EVENING FOR NORTHWESTERN WARREN, NORTHERN NORTHAMPTON AND
SOUTHEASTERN MONROE COUNTIES...
At 450 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to 1 inch of rain has fallen. The
expected rainfall rate is 1 to 2 inches in 1 hour. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Delaware Water Gap, Echo Lake, Werry Lake, Shawnee and Hidden Lake.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 3.
Interstate 80 in Pennsylvania near mile marker 314.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4109 7504 4108 7503 4108 7501 4093 7511
4090 7515 4089 7527
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MJL394
WGUS71 KPHI 092119
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
519 PM EDT Fri Aug 9 2024
NJC041-PAC089-095-092129-
/O.CAN.KPHI.FF.W.0053.000000T0000Z-240809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Monroe PA-Northampton PA-
519 PM EDT Fri Aug 9 2024
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN WARREN,
NORTHERN NORTHAMPTON AND SOUTHEASTERN MONROE COUNTIES...
Flood waters have receded. 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 100 AM EDT Saturday for
portions of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4109 7504 4108 7503 4108 7501 4093 7511
4090 7515 4089 7527
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 4:11 PM EDT | Flash Flood Warning | PHI | Warren | 100 min |
| Aug 9, 5:30 PM EDT | Flash Flood Warning | PHI | Mercer | 83 min |
| Aug 8, 8:52 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Aug 8, 9:06 PM EDT | River Flood Warning | PHI | Chester | 9 hr |
| Aug 8, 11:40 PM EDT | Areal Flood Warning | PHI | Chester | 4 hr |
| Aug 9, 12:12 AM EDT | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Aug 9, 2:50 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 2 hr |
| Aug 9, 3:50 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 2 hr |
| Aug 9, 5:56 PM EDT | River Flood Warning | PHI | Chester | 6 hr |
| Aug 9, 6:46 PM EDT | Areal Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 4 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.