Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 21, NWS Philadelphia/Mount Holly

July 3, 2018Hunterdon County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 3, 2018, 4:57 PM EDT for Hunterdon County, Somerset County, New Jersey. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 3, 2018, 4:57 PM EDT (20:57 UTC)
Expired: Jul 3, 2018, 6:51 PM EDT
In force: 114 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Hunterdon County, NJ, Somerset County, NJ

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 166 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 864 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

591 
WGUS51 KPHI 032057
FFWPHI
NJC019-035-040100-
/O.NEW.KPHI.FF.W.0021.180703T2057Z-180704T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
457 PM EDT TUE JUL 3 2018

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 900 PM EDT.

* At 456 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Flemington, Rocky Hill, Skillman, Cloverhill, Flagtown, Belle Mead
  and Raritan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4039 7473 4042 7475 4042 7480 4039 7481
      4039 7485 4056 7486 4057 7464 4039 7462

$$

Meola

1 follow-up statement

894 
WGUS71 KPHI 032251
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
651 PM EDT TUE JUL 3 2018

NJC019-035-032300-
/O.CAN.KPHI.FF.W.0021.000000T0000Z-180704T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Somerset NJ-
651 PM EDT TUE JUL 3 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN HUNTERDON AND
SOUTHWESTERN SOMERSET COUNTIES IS CANCELLED...

The heavy rain has moved out of the area. Flood waters are receding. 
Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 4039 7473 4042 7475 4042 7480 4039 7481
      4039 7485 4056 7486 4057 7464 4039 7462

$$

jjm

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 2:33 PM EDT	Special Weather Statement	PHI	Union	27 min
Jul 3, 2:57 PM EDT	Special Weather Statement	PHI	Morris	63 min
Jul 3, 3:19 PM EDT	Flash Flood Warning	PHI	Morris	3 hr
Jul 3, 3:28 PM EDT	Special Weather Statement	PHI	Salem	62 min
Jul 3, 3:30 PM EDT	Special Weather Statement	PHI	Burlington	60 min
Jul 3, 3:43 PM EDT	Flash Flood Warning	PHI	Morris	2 hr
Jul 3, 4:49 PM EDT	Special Weather Statement	PHI	Somerset	56 min
Jul 3, 4:52 PM EDT	Special Weather Statement	PHI	Mercer	53 min
Jul 3, 5:24 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	4 hr
Jul 3, 5:29 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 3, 5:45 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester	4 hr
Jul 3, 5:47 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	2 hr
Jul 3, 5:57 PM EDT	Special Weather Statement	PHI	Gloucester	33 min
Jul 3, 6:03 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 3, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	49 min
Jul 3, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	50 min
Jul 3, 6:37 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	3 hr
Jul 3, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	44 min
Jul 3, 6:58 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	49 min
Jul 3, 7:03 PM EDT	Special Weather Statement	PHI	Warren	57 min

Nearby

Flash Flood Warnings in New Jersey, 2018 Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.