Alert archive / New Jersey / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

July 17, 2017Hunterdon County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 17, 2017, 6:39 PM EDT for Hunterdon County, New Jersey. It was in force for 51 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 17, 2017, 6:39 PM EDT (22:39 UTC)
Expired: Jul 17, 2017, 7:30 PM EDT
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly

County Hunterdon County, NJ

The radar

The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 22:40 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, 10.7 hours before the alert went out and 172 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: 409 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

659 
WWUS81 KPHI 172239
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
639 PM EDT MON JUL 17 2017

NJZ008>010-172330-
Morris-Hunterdon-Somerset-
639 PM EDT MON JUL 17 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN MORRIS...
NORTHEASTERN HUNTERDON AND WESTERN SOMERSET COUNTIES...

At 638 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Clinton to near Sand Brook to near
Sergeantsville. Movement was northeast at 15 mph.

Winds up to 40 mph and pea size hail are possible with these storms.

These storms will be near...
  Clinton around 650 PM EDT. 
  Annandale around 655 PM EDT. 
  High Bridge around 700 PM EDT. 
  Flemington and Lebanon around 710 PM EDT. 
  White House Station around 715 PM EDT. 
  Califon around 720 PM EDT. 

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4076 7476 4053 7471 4048 7488 4046 7498
      4047 7500 4063 7502
TIME...MOT...LOC 2238Z 242DEG 12KT 4059 7494 4051 7493 4047 7498 

$$

Drag

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:56 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	4 hr
Jul 17, 4:16 PM EDT	Special Weather Statement	PHI	Gloucester	44 min
Jul 17, 4:35 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	115 min
Jul 17, 4:40 PM EDT	Special Weather Statement	PHI	Warren	65 min
Jul 17, 4:44 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jul 17, 5:00 PM EDT	Special Weather Statement	PHI	Warren	30 min
Jul 17, 5:31 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	119 min
Jul 17, 5:51 PM EDT	Special Weather Statement	PHI	Hunterdon	39 min
Jul 17, 6:12 PM EDT	Special Weather Statement	PHI	Morris	33 min
Jul 17, 6:33 PM EDT	Flash Flood Warning	PHI	Morris	117 min
Jul 17, 6:44 PM EDT	Special Weather Statement	PHI	Morris	46 min
Jul 17, 1:09 PM EDT	Special Weather Statement	PHI	Lehigh	36 min
Jul 17, 1:20 PM EDT	Severe Thunderstorm Warning	PHI	Berks	40 min
Jul 17, 1:24 PM EDT	Areal Flood Advisory	PHI	Berks	5 hr
Jul 17, 1:41 PM EDT	Flash Flood Warning	PHI	Berks	7 hr
Jul 17, 1:57 PM EDT	Special Weather Statement	PHI	Lebanon	33 min
Jul 17, 3:16 PM EDT	Areal Flood Advisory	PHI	Berks	119 min
Jul 17, 4:24 PM EDT	Special Weather Statement	PHI	Northampton	51 min
Jul 17, 4:56 PM EDT	Special Weather Statement	PHI	Philadelphia	49 min
Jul 17, 4:57 PM EDT	Special Weather Statement	PHI	Chester	33 min
Jul 17, 5:55 PM EDT	Special Weather Statement	PHI	Chester	50 min
Jul 17, 4:46 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent	119 min
Jul 17, 4:52 PM EDT	Special Weather Statement	PHI	Cecil	53 min
Jul 17, 5:11 PM EDT	Special Weather Statement	PHI	Kent	49 min
Jul 17, 5:19 PM EDT	Special Weather Statement	PHI	Cecil	56 min
Jul 17, 6:13 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	2 hr
Jul 17, 6:16 PM EDT	Special Weather Statement	PHI	Queen Anne's	44 min
Jul 17, 6:49 PM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	56 min

Nearby

Special Weather Statements in New Jersey, 2017 Every special weather statement 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.