Alert archive / New Jersey / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

August 3, 2020Hunterdon County, Somerset County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2020, 8:07 PM EDT for Hunterdon County, Somerset County, Warren County, New Jersey. It was in force for 23 min. 3 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
Aug 3, 2020, 8:07 PM EDT (00:07 UTC)
Expired
Aug 3, 2020, 8:30 PM EDT
In force
23 min
Issued by
NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Somerset County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 00:10 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

TimeReportWhereRemark
Aug 3, 8:15 PM EDTTSTM WND DMGBranchburg Twp, NJTREES DOWN IN BRANCHBURG.
Aug 3, 8:17 PM EDTTSTM WND GST 59Neshanic Station, NJ
Aug 3, 8:30 PM EDTTSTM WND DMGBedminster Twp, NJTREES DOWN IN BEDMINSTER.

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, 0.1 hours before the alert went out and 158 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, Brookhaven, NY at 00:00Z on 2020-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 560 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2020-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.193958Sfc1 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
560 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1172 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

251 
WWUS81 KPHI 040007
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
807 PM EDT Mon Aug 3 2020

NJZ007>010-PAZ105-040030-
Morris-Hunterdon-Somerset-Warren-Upper Bucks-
807 PM EDT Mon Aug 3 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN MORRIS...
HUNTERDON...CENTRAL WARREN...CENTRAL SOMERSET AND NORTH CENTRAL BUCKS
COUNTIES...

At 806 PM EDT, a strong thunderstorm was located near Flemington, or
17 miles west of Somerville, moving northeast at 35 mph.

Wind gusts up to 45 mph 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.

Locations impacted include...
Somerville, Bridgewater, Manville, Hackettstown, Washington, Mendham,
Flemington, High Bridge, Clinton, Peapack And Gladstone, Oxford,
Alpha, Hope, Glen Gardner, Chester, Ferndale, Hampton, Frenchtown,
Lebanon and Milford.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 2 and 40.
 Interstate 80 in New Jersey between mile markers 12 and 13.
 Interstate 287 in New Jersey between mile markers 15 and 34.

LAT...LON 4068 7445 4066 7445 4042 7477 4042 7480
      4039 7481 4050 7527 4094 7497 4073 7438
TIME...MOT...LOC 0006Z 217DEG 32KT 4053 7494 

$$

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset34 min
Aug 3, 9:02 PM EDTSpecial Weather StatementPHIMorris28 min
Aug 4, 5:17 AM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more4 hr
Aug 4, 5:55 AM EDTSpecial Marine WarningPHI21 min
Aug 4, 7:28 AM EDTFlash Flood WarningPHIGloucester, Salem3 hr
Aug 4, 8:38 AM EDTSpecial Marine WarningPHI52 min
Aug 4, 9:16 AM EDTTornado WarningPHICumberland18 min
Aug 4, 9:28 AM EDTSpecial Marine WarningPHI32 min
Aug 4, 9:31 AM EDTSpecial Marine WarningPHI59 min
Aug 4, 9:42 AM EDTTornado WarningPHIAtlantic, Cape May19 min
Aug 4, 10:02 AM EDTFlash Flood WarningPHIGloucester, Salem4 hr
Aug 4, 10:15 AM EDTTornado WarningPHIAtlantic, Burlington, Ocean14 min
Aug 4, 10:20 AM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester4 hr
Aug 4, 11:00 AM EDTTornado Warning Tornado observedPHIMonmouth, Ocean11 min
Aug 4, 11:01 AM EDTFlash Flood WarningPHIBurlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more4 hr
Aug 4, 11:13 AM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Aug 4, 11:43 AM EDTFlash Flood WarningPHIWarren4 hr
Aug 4, 11:59 AM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Monmouth, Morris, Somerset4 hr
Aug 4, 2:33 PM EDTRiver Flood WarningPHIHunterdon, Somerset5 hr
Aug 4, 2:47 PM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset, Warren9 hr
Aug 4, 3:42 PM EDTAreal Flood WarningPHIWarren4 hr
Aug 4, 4:37 PM EDTAreal Flood WarningPHICumberland, Salem10 hr
Aug 4, 5:04 PM EDTSmall Craft AdvisoryPHI14 hr
Aug 4, 5:30 PM EDTCoastal Flood StatementPHIOcean103 min
Aug 4, 7:23 AM EDTTornado WarningPHIChester, Delaware, Montgomery, Philadelphia20 min
Aug 4, 8:11 AM EDTFlash Flood WarningPHIBucks, Lehigh, Montgomery, Northampton4 hr
Aug 4, 8:19 AM EDTRiver Flood WarningPHIDelaware15 hr
Aug 4, 8:19 AM EDTTornado WarningPHIBucks26 min
Aug 4, 9:23 AM EDTTornado Warning Tornado observedPHIChester22 min
Aug 4, 9:29 AM EDTTornado WarningPHIMonroe, Northampton31 min
Aug 4, 9:38 AM EDTFlash Flood WarningPHIMonroe, Northampton4 hr
Aug 4, 9:58 AM EDTTornado WarningPHIMonroe16 min
Aug 4, 10:51 AM EDTTornado WarningPHIMontgomery24 min
Aug 4, 12:06 PM EDTRiver Flood WarningPHIChester11 hr
Aug 4, 12:37 PM EDTRiver Flood WarningPHIMontgomery14 hr
Aug 4, 12:48 PM EDTRiver Flood WarningPHIChester, Delaware24 hr
Aug 4, 1:01 PM EDTRiver Flood WarningPHIBucks18 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIBerks10 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIMontgomery26 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia43 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIMontgomery, Philadelphia35 hr
Aug 4, 1:59 PM EDTAreal Flood WarningPHIChester, Delaware9 hr
Aug 4, 2:09 PM EDTAreal Flood WarningPHIBerks, Chester, Delaware, Montgomery, Philadelphia15 hr
Aug 4, 2:23 PM EDTRiver Flood WarningPHILehigh16 hr
Aug 4, 4:39 PM EDTRiver Flood WarningPHIMonroe6 hr
Aug 4, 7:29 PM EDTAreal Flood WarningPHILehigh, Northampton12 hr
Aug 4, 4:50 AM EDTTornado WarningPHISussex25 min
Aug 4, 7:39 AM EDTTornado WarningPHISussex36 min
Aug 4, 7:51 AM EDTTornado WarningPHISussex24 min
Aug 4, 8:15 AM EDTTornado WarningPHIKent45 min
Aug 4, 8:18 AM EDTTornado WarningPHISussex27 min
Aug 4, 8:27 AM EDTTornado WarningPHIKent33 min
Aug 4, 8:56 AM EDTTornado WarningPHIKent, New Castle34 min
Aug 4, 8:58 AM EDTFlash Flood WarningPHIKent, New Castle, Sussex3 hr
Aug 4, 9:06 AM EDTRiver Flood WarningPHINew Castle11 hr
Aug 4, 9:23 AM EDTFlash Flood WarningPHINew Castle4 hr
Aug 4, 10:38 AM EDTRiver Flood WarningPHINew Castle14 hr
Aug 4, 12:27 PM EDTRiver Flood WarningPHINew Castle10 hr
Aug 4, 12:48 PM EDTRiver Flood WarningPHINew Castle24 hr
Aug 4, 1:33 AM EDTAreal Flood AdvisoryPHICaroline, Kent, Queen Anne's, Talbot4 hr
Aug 4, 2:10 AM EDTFlash Flood WarningPHICaroline, Kent, Queen Anne's, Talbot4 hr
Aug 4, 6:55 AM EDTTornado WarningPHIKent, Queen Anne's35 min
Aug 4, 7:22 AM EDTTornado WarningPHIKent, Queen Anne's23 min
Aug 4, 7:50 AM EDTFlash Flood WarningPHICaroline, Kent, Queen Anne's, Talbot4 hr
Aug 4, 8:13 AM EDTTornado WarningPHIKent, Queen Anne's, Talbot26 min
Aug 4, 8:50 AM EDTFlash Flood WarningPHICaroline, Cecil, Kent, Queen Anne's4 hr

Nearby

Special Weather Statements in New Jersey, 2020Every special weather statement in 2020

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.