Alert archive / New Jersey / Areal Flood Warnings in 2017

Areal Flood Warning 3, NWS Philadelphia/Mount Holly

April 6, 2017Hunterdon County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Apr 6, 2017, 7:41 PM EDT for Hunterdon County, Somerset County, New Jersey. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 6, 2017, 7:41 PM EDT (23:41 UTC)
Expired: Apr 6, 2017, 10:45 PM EDT
In force: 3 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), 68 km from the middle of the area, began a volume at 23:43 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.7 hours before the alert went out and 169 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: 8 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 428 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 407 m²/s²
0-3 km storm-relative helicity: 569 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

754 
WGUS41 KPHI 062341
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
741 PM EDT THU APR 6 2017

NJC019-035-070245-
/O.NEW.KPHI.FA.W.0003.170406T2341Z-170407T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Somerset NJ-
741 PM EDT THU APR 6 2017

The National Weather Service in Mount Holly NJ  has issued a

* Flood Warning for...
  East central Hunterdon County in northwestern New Jersey...
  Southwestern Somerset County in northern New Jersey...

* Until 1045 PM EDT

* At 738 PM EDT...the Neshanic River at Reaville was above flood 
  stage. Roads are subject to closures in the vicinity of the river. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means that flooding is imminent or occurring. Do not 
drive around barricades or through flooded areas.

&&

LAT...LON 4049 7479 4050 7476 4047 7473 4045 7477
      4046 7489 4050 7487

$$

Kruzdlo

1 follow-up statement

118 
WGUS81 KPHI 070158
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
958 PM EDT THU APR 6 2017

NJC019-035-070205-
/O.CAN.KPHI.FA.W.0003.000000T0000Z-170407T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Somerset NJ-
958 PM EDT THU APR 6 2017

...THE FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL HUNTERDON
AND SOUTHWESTERN SOMERSET COUNTIES...

Flood waters are receding. The river gauge along the Neshanic River 
at Reaville has fallen below flood stage. The flood warning has been 
cancelled.

LAT...LON 4049 7479 4050 7476 4047 7473 4045 7477
      4046 7489 4050 7487

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 12:29 PM EDT	Special Marine Warning	PHI		61 min
Apr 6, 1:00 PM EDT	Special Weather Statement	PHI	Salem	60 min
Apr 6, 1:21 PM EDT	Special Marine Warning	PHI		54 min
Apr 6, 1:33 PM EDT	Special Marine Warning	PHI		57 min
Apr 6, 1:53 PM EDT	Special Marine Warning	PHI		22 min
Apr 6, 2:07 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 6 more	53 min
Apr 6, 2:15 PM EDT	Special Marine Warning	PHI		45 min
Apr 6, 2:24 PM EDT	Special Marine Warning	PHI		36 min
Apr 6, 2:29 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Apr 6, 2:56 PM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester, Salem	64 min
Apr 6, 3:02 PM EDT	Special Marine Warning	PHI		58 min
Apr 6, 3:09 PM EDT	Special Marine Warning	PHI		51 min
Apr 6, 3:36 PM EDT	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	24 min
Apr 6, 3:56 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Ocean	49 min
Apr 6, 3:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Morris, Ocean	4 hr
Apr 6, 3:59 PM EDT	Special Marine Warning	PHI		61 min
Apr 6, 4:26 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Sussex, Warren	4 hr

Nearby

Areal Flood Warnings in New Jersey, 2017 Every areal flood warning in 2017

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; radar from the NEXRAD Level II archive.