Alert archive / New Jersey / Areal Flood Advisories in 2018
Areal Flood Advisory 304, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Sep 25, 2018, 2:30 PM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Sep 25, 2018, 2:30 PM EDT (18:30 UTC)
- Expired
- Sep 25, 2018, 5:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 83 km from the middle of the area, began a volume at 18:31 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, 6.5 hours before the alert went out and 155 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 457 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 413 m²/s²
- 0-3 km storm-relative helicity
- 577 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Sep 25, 1:49 PM EDT, 41 minutes earlier.
Area forecast discussion, Sep 25, 1:49 PM EDT, 41 minutes before
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</html>Hazardous weather outlook, Sep 25, 2:23 PM EDT, 7 minutes before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>In the hours before
Special weather statement, Sep 25, 12:07 PM EDT, 2 hours 23 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1207 PM EDT TUE SEP 25 2018
NJZ001-007>010-012-015-PAZ055-062-105-106-251630-
Morris-Hunterdon-Sussex-Somerset-Middlesex-Warren-Mercer-Lower
Bucks-Upper Bucks-Monroe-Northampton-
1207 PM EDT TUE SEP 25 2018
...A LINE OF SHOWERS WILL AFFECT MORRIS...HUNTERDON...SUSSEX...
WARREN...NORTHWESTERN MERCER...SOMERSET...NORTH CENTRAL MIDDLESEX...
CENTRAL BUCKS...EAST CENTRAL MONROE AND EASTERN NORTHAMPTON
COUNTIES...
At 1206 PM EDT, radar indicated showers were located along a line
extending from near Port Jervis to Chester to Hopewell. Movement was
northeast at 25 mph.
Moderate to heavy rainfall is occurring with these showers, and may
cause ponding on roadways and poor drainage areas.
Locations impacted include...
Easton, Morristown, Somerville, Newton, Montague, Bridgewater, Dover,
Madison, Hopatcong, Middlesex, Florham Park, East Hanover, Lincoln
Park, Bound Brook, Manville, Kinnelon, Hackettstown, Chatham, Byram
and Boonton.
LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
4102 7443 4100 7430 4090 7427 4091 7433
4075 7436 4067 7446 4066 7440 4060 7446
4060 7437 4021 7499 4058 7524 4115 7513
4109 7500 4116 7490 4128 7484 4136 7469
TIME...MOT...LOC 1606Z 225DEG 21KT 4141 7464 4077 7471 4040 7480
RobertsonSpecial weather statement, Sep 25, 12:47 PM EDT, 1 hour 43 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1247 PM EDT TUE SEP 25 2018
NJZ001-007>010-012-015-251730-
Morris-Hunterdon-Sussex-Somerset-Middlesex-Warren-Mercer-
1247 PM EDT TUE SEP 25 2018
...A LINE OF SHOWERS WILL AFFECT MORRIS...EASTERN HUNTERDON...
SUSSEX...NORTHEASTERN WARREN...NORTHWESTERN MERCER...SOMERSET AND
NORTHERN MIDDLESEX COUNTIES...
At 1247 PM EDT, radar indicated showers were located along a line
extending from High Point to near Bridgewater to New Hope. Movement
was northeast at 25 mph.
Moderate to heavy rainfall is occurring with these showers, and may
cause ponding on roadways and poor drainage areas.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Port Jervis,
Newton, Montague, Somerset, Edison, East Brunswick, Bridgewater,
Sayreville, North Brunswick, Carteret, Dover, Madison, Hopatcong,
Middlesex, Florham Park and East Hanover.
LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
4102 7443 4097 7428 4090 7427 4091 7433
4075 7436 4067 7446 4065 7440 4060 7446
4059 7420 4048 7427 4031 7491 4034 7494
4064 7481 4125 7486 4135 7475 4136 7469
TIME...MOT...LOC 1647Z 244DEG 15KT 4132 7469 4064 7463 4034 7494
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 12:07 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 23 min |
| Sep 25, 12:33 PM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 8 hr |
| Sep 25, 12:47 PM EDT | Special Weather Statement | PHI | Morris, Somerset, Sussex | 43 min |
| Sep 25, 4:03 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 1 more | 3 hr |
| Sep 25, 4:19 PM EDT | Flash Flood Warning | PHI | Camden | 4 hr |
| Sep 25, 5:14 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Somerset | 4 hr |
| Sep 25, 5:35 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer | 4 hr |
| Sep 25, 6:03 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Monmouth | 3 hr |
| Sep 25, 6:39 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester, Ocean | 3 hr |
| Sep 25, 6:47 PM EDT | Tornado Warning | PHI | Burlington | 32 min |
| Sep 25, 7:21 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 17 min |
| Sep 25, 2:59 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Lehigh, Montgomery | 4 hr |
Nearby
Areal Flood Advisories in New Jersey, 2018Every areal flood advisory 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.