Alert archive / New Jersey / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

May 31, 2017Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at May 31, 2017, 10:41 PM EDT for Sussex County, New Jersey. It was in force for 34 min. 2 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: May 31, 2017, 10:41 PM EDT (02:41 UTC)
Expired: May 31, 2017, 11:15 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 137 km from the middle of the area, began a volume at 02:43 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.

What was reported inside it

Time	Report	Where	Remark
May 31, 10:53 PM EDT	HAIL 0.5	Highland Lakes, NJ	DIME SIZE HAIL
May 31, 10:53 PM EDT	HAIL 0.75	Highland Lakes, NJ	DIME SIZE HAIL.

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 00:00Z, 2.7 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

333 
WWUS81 KPHI 010241
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1041 PM EDT WED MAY 31 2017

NJZ001-008-010315-
Morris-Sussex-
1041 PM EDT WED MAY 31 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN MORRIS AND NORTHEASTERN
SUSSEX COUNTIES...

At 1040 PM EDT, a strong thunderstorm was located over Pellettown, or
9 miles northeast of Newton, moving east at 40 mph.

This storm will be near...
  Hamburg around 1045 PM EDT. 
  Highland Lake and Vernon Valley around 1055 PM EDT. 
  Upper Greenwood Lake around 1105 PM EDT. 

Wind gusts up to 30 mph and pea size hail are possible with this 
storm.

Heavy rainfall is also occurring with this storm...and may cause 
ponding on roadways and poor drainage areas. Do not drive your 
vehicle through flooded roadways.

Occasional cloud to ground lightning is occurring with this storm. 
Lightning can strike 15 miles away from a thunderstorm. If you see 
lightning or hear thunder seek a safe shelter inside a building or 
vehicle.

LAT...LON 4128 7453 4120 7437 4110 7449 4109 7450
      4108 7449 4105 7470 4123 7477 4129 7454
TIME...MOT...LOC 0240Z 255DEG 33KT 4116 7464 

$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	36 min
May 31, 8:39 PM EDT	Special Weather Statement	PHI	Somerset	36 min
May 31, 11:13 PM EDT	Special Weather Statement	PHI	Sussex, Warren	32 min
May 31, 11:42 PM EDT	Special Weather Statement	PHI	Sussex	33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.