Alert archive / New Jersey / Flash Flood Warnings in 2020
Flash Flood Warning 50, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 7, 2020, 7:25 PM EDT for 4 counties in New Jersey. It was in force for 4 hr. 8 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 7, 2020, 7:25 PM EDT (23:25 UTC)
- Expired
- Aug 7, 2020, 11:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 23:24 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 7, 8:00 PM EDT | FLOOD | Newfield, NJ | SOCIAL MEDIA VIDEO SHOWS SEVERE BACKYARD FLOODING. TIME ESTIMATED FROM RADAR. |
| Aug 7, 8:28 PM EDT | FLASH FLOOD | 1 Nw Buena, NJ | DELAYED REPORT. FLASH FLOODING CLOSED U.S. HIGHWAY 40 BETWEEN MALAGA ROAD AND EAST SUMMER ROAD IN BUENA. TIME BASED ON DISPATCH REPORT. |
| Aug 7, 8:35 PM EDT | FLASH FLOOD | 1 Nw Vineland, NJ | DELAYED REPORT. FLASH FLOODING CLOSED STATE HIGHWAY 47 IN AREA OF OAK ROAD IN VINELAND. TIME BASED ON DISPATCH REPORT. |
| Aug 7, 8:50 PM EDT | HEAVY RAIN 1 | Villas, NJ | 1 INCH OF RAIN IN JUST 10 MINUTES IN THE VILLAS MIAMI BEACH SECTION. |
| Aug 7, 8:50 PM EDT | HEAVY RAIN 1.1 | Dennisville, NJ | 1.10 INCHES OF RAIN IN JUST 9 MINUTES. |
| Aug 7, 9:38 PM EDT | FLASH FLOOD | 1 N North Wildwood, NJ | DELAYED REPORT. FLASH FLOODING CLOSED STATE HIGHWAY 147 NEAR MARYLAND AVENUE IN NORTH WILDWOOD. TIME BASED ON DISPATCH REPORT. |
| Aug 7, 9:40 PM EDT | FLASH FLOOD | 2 Nw Cardiff, NJ | DELAYED REPORT. FLASH FLOODING CLOSED U.S. HIGHWAY 40 NEAR ENGLISH CREEK AVENUE. TIME BASED ON DISPATCH REPORT. |
| Aug 7, 10:03 PM EDT | FLASH FLOOD | 1 S Pomona, NJ | DELAYED REPORT. FLASH FLOODING CLOSED U.S. HIGHWAY 30 NEAR GARDEN STATE PARKWAY. TIME BASED ON DISPATCH REPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.4 hours before the alert went out and 172 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
- 248 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
144
WGUS51 KPHI 072325
FFWPHI
NJC001-009-011-015-080330-
/O.NEW.KPHI.FF.W.0050.200807T2325Z-200808T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
725 PM EDT Fri Aug 7 2020
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Atlantic County in southern New Jersey...
Cumberland County in southern New Jersey...
Southeastern Gloucester County in southern New Jersey...
Cape May County in southern New Jersey...
* Until 1130 PM EDT.
* At 724 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain moving into the warned area from the west. Flash
flooding is expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
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 could experience flooding include...
Vineland, Atlantic City, Millville, Bridgeton, Ocean City, Cape
May, Cumberland, Pleasantville, Hammonton, Somers Point, Ventnor
City, Brigantine, Northfield, Absecon, Margate City, Buena, Egg
Harbor City, North Wildwood, Laurel Lake and Wildwood Crest.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other poor drainage areas and low lying spots.
&&
LAT...LON 3916 7437 3910 7447 3887 7464 3877 7484
3939 7549 3941 7545 3939 7542 3944 7541
3955 7522 3946 7508 3957 7506 3961 7512
3970 7496 3961 7487 3973 7473 3969 7467
3963 7465 3956 7449 3955 7436 3944 7418
FLASH FLOOD...RADAR INDICATED
$$
Iovino1 follow-up statement
140
WGUS71 KPHI 080222
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1022 PM EDT Fri Aug 7 2020
NJC001-011-015-080231-
/O.CAN.KPHI.FF.W.0050.000000T0000Z-200808T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Cumberland NJ-Gloucester NJ-
1022 PM EDT Fri Aug 7 2020
...THE FLASH FLOOD WARNING FOR ATLANTIC...CUMBERLAND AND SOUTHEASTERN
GLOUCESTER COUNTIES IS CANCELLED...
Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.
LAT...LON 3913 7464 3905 7469 3891 7476 3887 7493
3909 7511
$$
NJC009-080330-
/O.CON.KPHI.FF.W.0050.000000T0000Z-200808T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cape May NJ-
1022 PM EDT Fri Aug 7 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT FOR
SOUTHERN CAPE MAY COUNTY...
At 1021 PM EDT, Doppler radar indicated showers and thunderstorms
producing heavy rain across the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
poor drainage and low lying areas.
Some locations that could experience flooding include...
Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon, West
Cape May, Stone Harbor, Cape May Court House, Scotch Bonnet, Diamond
Beach, Green Creek, Rio Grande, North Cape May, Villas, West
Wildwood, Erma and Whitesboro-Burleigh.
Additional rainfall amounts of up to an inch are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other poor drainage areas and low lying spots.
&&
LAT...LON 3913 7464 3905 7469 3891 7476 3887 7493
3909 7511
FLASH FLOOD...RADAR INDICATED
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:15 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 3 hr |
| Aug 7, 5:25 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 3 hr |
| Aug 7, 5:43 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 4 hr |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 48 min |
| Aug 7, 6:00 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 30 min |
| Aug 7, 6:08 PM EDT | Areal Flood Advisory | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Aug 7, 6:16 PM EDT | Areal Flood Advisory | PHI | Mercer | 2 hr |
| Aug 7, 6:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 7, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer | 27 min |
| Aug 7, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 49 min |
| Aug 7, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 48 min |
| Aug 7, 7:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 7, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more | 62 min |
Nearby
Flash Flood Warnings in New Jersey, 2020Every flash flood warning in 2020
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.