Alert archive / New Jersey / Flash Flood Warnings in 2016
Flash Flood Warning 32, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 11, 2016, 5:25 PM EDT for Hunterdon County, Somerset County, New Jersey. It was in force for 7 hr. 3 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 11, 2016, 5:25 PM EDT (21:25 UTC)
- Expired
- Aug 12, 2016, 12:30 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 21:29 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 11, 6:40 PM EDT | FLASH FLOOD | East Amwell Twp, NJ | THE NESHANIC RIVER WAS OUT OF ITS BANKS AROUND THE REAVILLE USGS RIVER GAUGE. |
| Aug 11, 7:30 PM EDT | HEAVY RAIN 3.44 | 1 Nne Bowne, NJ | 2.79 INCHES FELL IN 90 MINUTE PERIOD ENDING 526 PM |
| Aug 11, 7:30 PM EDT | HEAVY RAIN 4.75 | 1 Ne Larisons Corners, NJ | 3.95 INCHES FELL IN 90 MINUTE PERIOD ENDING 539 PM |
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, 9.4 hours before the alert went out and 170 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
- 1804 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 802 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
335
WGUS51 KPHI 112125
FFWPHI
NJC019-035-120030-
/O.NEW.KPHI.FF.W.0032.160811T2125Z-160812T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
525 PM EDT THU AUG 11 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 830 PM EDT
* AT 523 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 2 AND 3 INCHES
HASFALLEN IN SOME SPOTS. FLASH FLOODING IS EXPECTED TO BEGIN
SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FLEMINGTON...STOCKTON...SAND BROOK...CLOVERHILL...SERGEANTSVILLE...
FLAGTOWN...BELLE MEAD AND LAMBERTVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND IF WATER STARTS TO RISE.
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4042 7474 4042 7480 4040 7481 4037 7495
4051 7506 4057 7467 4044 7466
$$
JJM3 follow-up statements
878
WGUS71 KPHI 112345
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
745 PM EDT THU AUG 11 2016
NJC019-035-120030-
/O.CON.KPHI.FF.W.0032.000000T0000Z-160812T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-SOMERSET NJ-
745 PM EDT THU AUG 11 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR
SOUTHEASTERN HUNTERDON AND SOUTHWESTERN SOMERSET COUNTIES...
AT 738 PM EDT...HEAVY RAIN HAD MOVED OUT OF THE WARNED AREA.
HOWEVER...THE NESHANIC RIVER AT REAVILLE WAS APPROACHING A CREST OF
7.5 FEET AS A RESULT OF EARLIER HEAVY RAIN. FLOOD STAGE AT REAVILLE
IS 6.5 FEET. OTHER SMALL STREAMS ARE STILL RUNNING HIGH. THE FLASH
FLOOD WARNING WILL THEREFORE BE ALLOWED TO CONTINUE.
LAT...LON 4042 7474 4042 7480 4040 7481 4037 7495
4051 7506 4057 7467 4044 7466
$$
JJM897
WGUS51 KPHI 120027
FFWPHI
NJC019-035-120430-
/O.EXT.KPHI.FF.W.0032.000000T0000Z-160812T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
827 PM EDT THU AUG 11 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 1230 AM EDT
* AT 823 PM EDT...THE NESHANIC RIVER AT REAVILLE WAS 8.2 FEET AND
RISING. FLOOD STAGE AT REAVILLE IS 6.5 FEET. WHILE HEAVY RAIN HAS
MOVED OUT OF THE WARNED AREA...SOME STREAMS SUCH AS THE NESHANIC
RIVER REMAIN OUT OF THEIR BANKS. THE FLASH FLOOD WARNING HAS
THEREFORE BEEN EXTENDED UNTIL AFTER MIDNIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF YOU ENCOUNTER WATER ON THE ROADWAY...TURN
AROUND...DON'T DROWN.
&&
LAT...LON 4042 7474 4042 7480 4040 7481 4037 7495
4051 7506 4057 7467 4044 7466
$$
JJM805
WGUS71 KPHI 120424
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1224 AM EDT FRI AUG 12 2016
NJC019-035-120430-
/O.EXP.KPHI.FF.W.0032.000000T0000Z-160812T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-SOMERSET NJ-
1224 AM EDT FRI AUG 12 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN HUNTERDON AND
SOUTHWESTERN SOMERSET COUNTIES WILL EXPIRE AT 1230 AM EDT...
THE STAGE OF THE NESHANIC RIVER AT REAVILLE HAS DROPPED BELOW FLOOD
STAGE...AND WATER CONTINUES TO RECEDE ELSEWHERE IN THE WARNED
AREA...AND NO LONGER POSES A THREAT TO LIFE AND PROPERTY. THE FLASH
FLOOD WARNING WILL THEREFORE BE ALLOWED TO EXPIRE.
LAT...LON 4042 7474 4042 7480 4040 7481 4037 7495
4051 7506 4057 7467 4044 7466
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 11:50 AM EDT | Heat Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 7 more | 32 hr |
| Aug 11, 3:24 PM EDT | Excessive Heat Watch | PHI | Atlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 7 more | 37 hr |
| Aug 11, 4:15 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 24 min |
| Aug 11, 4:57 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Somerset | 3 hr |
Nearby
Flash Flood Warnings in New Jersey, 2016Every flash flood warning in 2016
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.