Alert archive / New Jersey / Flash Flood Warnings in 2022
Flash Flood Warning 11, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 20, 2022, 5:49 PM EDT for Morris County, New Jersey. It was in force for 114 min. 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 20, 2022, 5:49 PM EDT (21:49 UTC)
- Expired
- Aug 20, 2022, 7:43 PM EDT
- In force
- 114 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Morris County, NJ
The radar
The Philadelphia radar (KDIX), 116 km from the middle of the area, began a volume at 21:52 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 20, 6:32 PM EDT | HEAVY RAIN 2.63 | Butler, NJ |
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, 9.8 hours before the alert went out and 124 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
- 557 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1219 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
206
WGUS51 KPHI 202149
FFWPHI
NJC027-210200-
/O.NEW.KPHI.FF.W.0011.220820T2149Z-220821T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
549 PM EDT Sat Aug 20 2022
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northeastern Morris County in northern New Jersey...
* Until 1000 PM EDT.
* At 549 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. The expected rainfall rate is 1 to 3 inches in 1
hour. Additional rainfall amounts of 1 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...
Kinnelon, Butler, Riverdale, and Pequannock Township.
This includes the following highways...
Interstate 287 in New Jersey between mile markers 50 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4096 7428 4094 7439 4098 7444 4101 7439
4101 7436 4101 7435 4100 7435 4101 7434
4100 7433 4100 7432 4100 7431 4100 7430
4099 7429 4098 7430 4098 7428 4097 7428
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
RCM1 follow-up statement
484
WGUS71 KPHI 202343
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
743 PM EDT Sat Aug 20 2022
NJC027-202353-
/O.CAN.KPHI.FF.W.0011.000000T0000Z-220821T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris NJ-
743 PM EDT Sat Aug 20 2022
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN MORRIS COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat.
LAT...LON 4096 7428 4094 7439 4098 7444 4101 7439
4101 7436 4101 7435 4100 7435 4101 7434
4100 7433 4100 7432 4100 7431 4100 7430
4099 7429 4098 7430 4098 7428 4097 7428
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:13 PM EDT | Areal Flood Advisory | PHI | Morris | 2 hr |
| Aug 20, 5:16 PM EDT | Special Weather Statement | PHI | Passaic | 29 min |
| Aug 20, 5:33 PM EDT | Areal Flood Advisory | PHI | Morris | 2 hr |
| Aug 20, 5:46 PM EDT | Special Weather Statement | PHI | Passaic | 29 min |
Nearby
Flash Flood Warnings in New Jersey, 2022Every flash flood warning in 2022
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.