Alert archive / New Jersey / Areal Flood Advisories in 2020
Areal Flood Advisory 177, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Sep 10, 2020, 7:31 PM EDT for Mercer County, Middlesex County, Somerset County, New Jersey. It was in force for 101 min.
The area
The counties it named.
The facts
- Issued
- Sep 10, 2020, 7:31 PM EDT (23:31 UTC)
- Expired
- Sep 10, 2020, 9:12 PM EDT
- In force
- 101 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 23:30 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
Albany, NY (KALY), launched 12:00Z, 11.5 hours before the alert went out and 259 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
- 1287 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 62 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 10, 3:16 PM EDT, 4 hours 15 minutes earlier.
Area forecast discussion, Sep 10, 3:16 PM EDT, 4 hours 15 minutes before
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</html>Hazardous weather outlook, Sep 10, 3:18 PM EDT, 4 hours 13 minutes before
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<link rel="stylesheet" href="index.css">
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 4:39 AM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May | 2 hr |
| Sep 10, 2:48 PM EDT | Small Craft Advisory | PHI | 6 days | |
| Sep 10, 4:08 PM EDT | Areal Flood Advisory | PHI | Camden, Cumberland, Gloucester, Salem | 4 hr |
| Sep 10, 5:04 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Somerset | 3 hr |
| Sep 10, 3:07 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery | 3 hr |
Nearby
Areal Flood Advisories in New Jersey, 2020Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.