Alert archive / New Jersey / Areal Flood Advisories in 2019

Areal Flood Advisory 16, NWS Philadelphia/Mount Holly

March 22, 20197 counties in New Jersey; Bucks County, Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Mar 22, 2019, 12:12 AM EDT for 7 counties in New Jersey; Bucks County, Monroe County, Northampton County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Mar 22, 2019, 12:12 AM EDT (04:12 UTC)
Expired: Mar 22, 2019, 4:57 AM EDT
In force: 5 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 04:14 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 4.2 hours before the alert went out and 290 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: 540 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 428 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Mar 21, 9:41 PM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, Mar 21, 9:41 PM EDT, 2 hours 31 minutes before

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Hazardous weather outlook, Mar 21, 4:17 PM EDT, 7 hours 55 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 11:50 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset	5 hr
Mar 22, 12:51 AM EDT	Coastal Flood Advisory	PHI	Middlesex, Monmouth, Ocean	11 hr
Mar 22, 6:35 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	25 min
Mar 22, 6:58 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	47 min
Mar 22, 4:21 PM EDT	Special Weather Statement	PHI	Berks, Montgomery	24 min
Mar 22, 4:46 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery	29 min
Mar 22, 5:46 PM EDT	Special Weather Statement	PHI	Sussex	29 min
Mar 22, 5:57 PM EDT	Special Weather Statement	PHI	New Castle	48 min
Mar 22, 6:18 PM EDT	Special Weather Statement	PHI	Sussex	27 min

Nearby

Areal Flood Advisories in New Jersey, 2019 Areal Flood Advisories in Pennsylvania, 2019 Every areal flood advisory in 2019

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.