Alert archive / New Jersey / Flash Flood Warnings in 2020
Flash Flood Warning 53, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 12, 2020, 1:12 PM EDT for Burlington County, New Jersey. It was in force for 3 hr. 6 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 12, 2020, 1:12 PM EDT (17:12 UTC)
- Expired
- Aug 12, 2020, 3:59 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Burlington County, NJ
The radar
The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 17:14 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 12, 1:30 PM EDT | FLASH FLOOD | Maple Shade, NJ | SEVERAL WATER RESCUES CONDUCTED IN THE MAPLE SHADE AREA. TIME BASED ON DISPATCH REPORTS. |
| Aug 12, 1:52 PM EDT | FLOOD | 1 Ene Maple Shade, NJ | FLOODING ON NJ 73 SOUTHBOUND AT CR 537/MAIN ST (MAPLE SHADE TWP) LEFT LANE CLOSED. |
| Aug 12, 2:02 PM EDT | FLASH FLOOD | 1 N Fellowship, NJ | CORRECTS PREVIOUS FLOOD REPORT FROM 1 N FELLOWSHIP. FLOODING ON NJ 38 BOTH DIRECTIONS CR 608/LENOLA RD (MAPLE SHADE TWP) ALL LANES CLOSED. SEVERAL WATER RESCUES WERE ALSO REPORTED. |
| Aug 12, 2:23 PM EDT | FLOOD | 1 N Fellowship, NJ | FLOODING ON NJ 38 BOTH DIRECTIONS CR 608/LENOLA RD (MAPLE SHADE TWP) ALL LANES CLOSED . |
| Aug 12, 2:23 PM EDT | FLOOD | 1 N Fellowship, NJ | FLOODING ON NJ 38 BOTH DIRECTIONS CR 608/LENOLA RD (MAPLE SHADE TWP) ALL LANES CLOSED. |
| Aug 12, 3:14 PM EDT | FLOOD | Hainesport, NJ | FLOODING ON NJ 38 WESTBOUND AT CR 641/LUMBERTON-HAINSPORT RD (HAINESPORT TWP). JUGHANDLE CLOSED. |
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, 5.2 hours before the alert went out and 194 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
- 1221 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 921 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted.
168
WGUS51 KPHI 121712
FFWPHI
NJC005-122115-
/O.NEW.KPHI.FF.W.0053.200812T1712Z-200812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
112 PM EDT Wed Aug 12 2020
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northern Burlington County in southern New Jersey...
* Until 515 PM EDT.
* At 111 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen...and more rain is moving in. 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...
Evesham, Mount Laurel, Willingboro, Medford, Lumberton,
Burlington, Mount Holly, Riverside, Palmyra, Presidential Lakes
Estates, Beverly, Pemberton, Wrightstown, Ramblewood, Marlton,
Leisuretowne, Jacksonville, Georgetown and Crosswicks.
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.
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 3986 7489 3993 7498 3994 7498 3995 7501
3998 7502 3998 7501 4002 7503 4005 7498
4016 7464 4012 7457 3992 7447 3991 7447
FLASH FLOOD...RADAR INDICATED
$$
JJM1 follow-up statement
776
WGUS71 KPHI 121959
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
359 PM EDT Wed Aug 12 2020
NJC005-122006-
/O.CAN.KPHI.FF.W.0053.000000T0000Z-200812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-
359 PM EDT Wed Aug 12 2020
...THE FLASH FLOOD WARNING FOR NORTHERN BURLINGTON COUNTY IS
CANCELLED...
Flooding is no longer expected to pose a threat in the northeastern
portion of the county. While flooding may still be occurring in the
northwestern portion of the county, a different flash flood warning
is in effect for that area.
Please continue to heed any remaining road closures.
LAT...LON 3986 7489 3993 7498 3994 7498 3995 7501
3998 7502 3998 7501 4002 7503 4005 7498
4016 7464 4012 7457 3992 7447 3991 7447
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 12:06 PM EDT | Special Weather Statement | PHI | Monmouth | 24 min |
| Aug 12, 12:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Aug 12, 12:33 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 42 min |
| Aug 12, 12:43 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Monmouth, Ocean and 1 more | 3 hr |
| Aug 12, 12:45 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 45 min |
| Aug 12, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Monmouth, Ocean | 48 min |
| Aug 12, 1:25 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 50 min |
| Aug 12, 1:54 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 51 min |
| Aug 12, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 48 min |
| Aug 12, 2:40 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 3 hr |
| Aug 12, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 25 min |
| Aug 12, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 46 min |
| Aug 12, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 29 min |
| Aug 12, 3:54 PM EDT | Special Marine Warning | PHI | 53 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.