Alert archive / New Jersey / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

October 11, 2018Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 11, 2018, 8:41 PM EDT for Gloucester County, Salem County, New Jersey. It was in force for 34 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
Oct 11, 2018, 8:41 PM EDT (00:41 UTC)
Expired
Oct 11, 2018, 9:15 PM EDT
In force
34 min
Issued by
NWS Philadelphia/Mount Holly

Counties Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 00:41 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.7 hours before the alert went out and 183 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2018-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 959 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2018-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
959 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.3

Open this sounding in Storm Lab

The text

As transmitted.

563 
WWUS81 KPHI 120041
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
841 PM EDT THU OCT 11 2018

NJZ016-017-021-120115-
Salem-Cumberland-Gloucester-
841 PM EDT THU OCT 11 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CUMBERLAND...
CENTRAL SALEM AND CENTRAL GLOUCESTER COUNTIES...

At 841 PM EDT, a strong thunderstorm was located near Shiloh, or 8
miles northwest of Bridgeton, moving northeast at 30 mph.

Winds up to 40 mph and pea size hail are possible with this storm.

Locations impacted include...
Bridgeton, Glassboro, Pitman, Clayton, Woodstown, Alloway, Quinton,
Swedesboro, Elmer, Shiloh, Franklinville, Olivet, Hancocks Bridge,
Mullica Hill, Gibbstown, Seabrook Farms, Williamstown and Centerton.

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

LAT...LON 3955 7545 3956 7545 3983 7528 3969 7498
      3939 7529 3948 7549
TIME...MOT...LOC 0041Z 210DEG 25KT 3950 7534 

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 11, 8:09 PM EDTSpecial Weather StatementPHISalem36 min
Oct 11, 8:27 PM EDTAreal Flood AdvisoryPHICumberland, Gloucester, Salem8 hr
Oct 11, 9:10 PM EDTSpecial Weather StatementPHICamden, Gloucester, Salem35 min
Oct 11, 9:43 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester8 hr
Oct 11, 10:45 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more3 hr
Oct 11, 11:54 PM EDTHigh Wind WarningPHICape May9 hr
Oct 12, 12:08 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem4 hr
Oct 12, 12:14 AM EDTStorm WarningPHI9 hr
Oct 12, 12:50 AM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Monmouth, Ocean3 hr
Oct 12, 1:15 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Ocean40 min
Oct 12, 1:52 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Cape May, Cumberland, Ocean4 hr
Oct 12, 2:55 AM EDTAreal Flood AdvisoryPHIGloucester, Hunterdon, Mercer, Middlesex, Somerset, Warren2 hr
Oct 12, 3:17 AM EDTFlash Flood WarningPHIBurlington, Mercer, Monmouth, Ocean4 hr
Oct 12, 3:46 AM EDTAreal Flood WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem7 hr
Oct 12, 5:32 AM EDTAreal Flood WarningPHIAtlantic, Burlington, Cape May, Cumberland, Ocean4 hr
Oct 12, 7:02 AM EDTAreal Flood WarningPHIBurlington, Mercer, Monmouth, Ocean4 hr
Oct 12, 11:42 AM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean4 hr
Oct 12, 11:45 AM EDTSmall Craft AdvisoryPHI12 hr
Oct 12, 3:20 PM EDTRiver Flood WarningPHIBurlington37 hr
Oct 11, 10:06 PM EDTFlash Flood WarningPHIKent6 hr
Oct 11, 11:47 PM EDTFlash Flood WarningPHIKent, Sussex4 hr
Oct 12, 3:28 AM EDTAreal Flood WarningPHIKent, Sussex6 hr
Oct 12, 3:36 AM EDTAreal Flood WarningPHIKent6 hr
Oct 12, 2:46 PM EDTAreal Flood WarningPHIKent7 hr
Oct 11, 11:36 PM EDTFlash Flood WarningPHIKent, Queen Anne's4 hr

Nearby

Special Weather Statements in New Jersey, 2018Every special weather statement 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; radar from the NEXRAD Level II archive.