Alert archive / New Jersey / Flash Flood Warnings in 2020
Flash Flood Warning 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 1, 2020, 4:05 PM EDT for Atlantic County, Cape May County, Cumberland County, New Jersey. It was in force for 3 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 1, 2020, 4:05 PM EDT (20:05 UTC)
- Expired
- Jul 1, 2020, 7:00 PM EDT
- In force
- 3 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
The radar
The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 20:04 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 1, 4:30 PM EDT | FLOOD | 1 Nne Seaville, NJ | EVERGREEN DRIVE FLOODED OUT IN SEAVILLE. EMERGENCY MANAGER MENTIONED IT IS RARE FOR THIS ROAD TO BE FLOODED. TIME ESTIMATED. |
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, 8.1 hours before the alert went out and 159 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
- 706 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1227 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
The text
As transmitted.
530
WGUS51 KPHI 012005
FFWPHI
NJC001-009-011-020000-
/O.NEW.KPHI.FF.W.0009.200701T2005Z-200702T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
405 PM EDT Wed Jul 1 2020
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
South central Atlantic County in southern New Jersey...
Southeastern Cumberland County in southern New Jersey...
Northern Cape May County in southern New Jersey...
* Until 800 PM EDT.
* At 404 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 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
drainage and low lying areas.
* Some locations that could experience flooding include...
Vineland, Millville, Ocean City, Cumberland, Somers Point, Laurel
Lake, Woodbine, Sea Isle City, Estell Manor, Avalon, Corbin City,
Mauricetown, Belleplain Forest, Leesburg, Beesleys Point, Seaville,
Marmora, Bricksboro, Dennisville and Strathmere.
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.
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other drainage areas and low lying spots.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3928 7457 3910 7469 3931 7511 3942 7500
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Gorse2 follow-up statements
896
WGUS71 KPHI 012047
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
447 PM EDT Wed Jul 1 2020
NJC001-009-011-020000-
/O.CON.KPHI.FF.W.0009.000000T0000Z-200702T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Cumberland NJ-Cape May NJ-
447 PM EDT Wed Jul 1 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
SOUTH CENTRAL ATLANTIC...SOUTHEASTERN CUMBERLAND AND NORTHERN CAPE
MAY COUNTIES...
At 446 PM EDT, Doppler radar indicated showers and thunderstorms are
weakening across the warned area, however additional showers and
storms producing heavy rain are just to the west and northwest and
may move into the warned area over the next hour or so. Up to two
inches of rain have already fallen. 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 drainage
and low lying areas.
Some locations that could experience flooding include...
Vineland, Millville, Ocean City, Cumberland, Somers Point, Laurel
Lake, Woodbine, Sea Isle City, Estell Manor, Avalon, Corbin City,
Mauricetown, Belleplain Forest, Leesburg, Beesleys Point, Seaville,
Marmora, Bricksboro, Dennisville and Strathmere.
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.
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other drainage areas and low lying spots.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3928 7457 3910 7469 3931 7511 3942 7500
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Gorse037 WGUS71 KPHI 012300 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 700 PM EDT Wed Jul 1 2020 NJC001-009-011-012310- /O.CAN.KPHI.FF.W.0009.000000T0000Z-200702T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Atlantic NJ-Cumberland NJ-Cape May NJ- 700 PM EDT Wed Jul 1 2020 ...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL ATLANTIC...SOUTHEASTERN CUMBERLAND AND NORTHERN CAPE MAY COUNTIES IS CANCELLED... The heavy rain has ended. Flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3928 7457 3910 7469 3931 7511 3942 7500 $$ Gorse
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 10:53 AM EDT | Special Weather Statement | PHI | Morris | 37 min |
| Jul 1, 11:08 AM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 102 min |
| Jul 1, 12:28 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 119 min |
| Jul 1, 12:39 PM EDT | Special Marine Warning | PHI | 96 min | |
| Jul 1, 1:30 PM EDT | Special Weather Statement | PHI | Ocean | 45 min |
| Jul 1, 1:45 PM EDT | Special Weather Statement | PHI | Atlantic | 45 min |
| Jul 1, 2:17 PM EDT | Special Weather Statement | PHI | Ocean | 43 min |
| Jul 1, 2:25 PM EDT | Special Weather Statement | PHI | Atlantic | 35 min |
| Jul 1, 2:55 PM EDT | Special Weather Statement | PHI | Atlantic | 65 min |
| Jul 1, 3:10 PM EDT | Flash Flood Warning | PHI | Atlantic | 3 hr |
| Jul 1, 3:17 PM EDT | Special Marine Warning | PHI | 88 min | |
| Jul 1, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 55 min |
| Jul 1, 4:15 PM EDT | Special Weather Statement | PHI | Cape May | 45 min |
| Jul 1, 5:09 PM EDT | Special Weather Statement | PHI | Cumberland | 51 min |
| Jul 1, 5:27 PM EDT | Areal Flood Advisory | PHI | Cumberland, Salem | 55 min |
| Jul 1, 7:06 PM EDT | Special Weather Statement | PHI | Somerset | 24 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.