Alert archive / New Jersey / Areal Flood Advisories in 2018

Areal Flood Advisory 84, NWS Philadelphia/Mount Holly

June 3, 2018Cumberland County, Gloucester County, Salem County, New Jersey; Chester County, Delaware County, Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 3, 2018, 6:16 PM EDT for Cumberland County, Gloucester County, Salem County, New Jersey; Chester County, Delaware County, Pennsylvania; New Castle County, Delaware. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 3, 2018, 6:16 PM EDT (22:16 UTC)
Expired: Jun 3, 2018, 9:07 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 22:15 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 12:00Z, 10.3 hours before the alert went out and 190 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: 270 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 76 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 Jun 3, 3:49 PM EDT, 2 hours 27 minutes earlier.

Area forecast discussion, Jun 3, 3:49 PM EDT, 2 hours 27 minutes before

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Hazardous weather outlook, Jun 3, 3:46 PM EDT, 2 hours 30 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
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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
Jun 2, 8:56 PM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	47 hr
Jun 2, 10:05 PM EDT	Special Weather Statement	PHI	Camden	40 min
Jun 3, 10:02 AM EDT	Wind Advisory	PHI	Atlantic, Cape May, Cumberland	6 hr
Jun 3, 7:58 PM EDT	Small Craft Advisory	PHI		24 hr
Jun 2, 10:51 PM EDT	Special Weather Statement	PHI	Chester, Delaware	54 min
Jun 2, 11:27 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	2 hr
Jun 3, 2:48 AM EDT	River Flood Warning	PHI	New Castle	3 hr
Jun 3, 11:40 AM EDT	Areal Flood Advisory	PHI	Sussex	4 hr

Nearby

Areal Flood Advisories in New Jersey, 2018 Areal Flood Advisories in Pennsylvania, 2018 Areal Flood Advisories in Delaware, 2018 Every 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.