Alert archive / Pennsylvania / Areal Flood Advisories in 2022

Areal Flood Advisory 6, NWS Philadelphia/Mount Holly

April 7, 2022Camden County, Gloucester County, Salem County, New Jersey; 4 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Apr 7, 2022, 9:44 AM EDT for Camden County, Gloucester County, Salem County, New Jersey; 4 counties in Pennsylvania; New Castle County, Delaware. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Apr 7, 2022, 9:44 AM EDT (13:44 UTC)
Expired: Apr 7, 2022, 12:45 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 13:47 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, 1.7 hours before the alert went out and 211 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: 464 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 295 m²/s²
0-3 km storm-relative helicity: 380 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 Apr 7, 6:32 AM EDT, 3 hours 12 minutes earlier.

Area forecast discussion, Apr 7, 6:32 AM EDT, 3 hours 12 minutes before

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Hazardous weather outlook, Apr 7, 4:57 AM EDT, 4 hours 47 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
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        Please try again in a few minutes.
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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
Apr 7, 12:05 PM EDT	Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	13 hr
Apr 7, 5:06 PM EDT	Areal Flood Warning	PHI	Hunterdon, Somerset	12 hr
Apr 7, 7:01 PM EDT	Areal Flood Advisory	PHI	Gloucester, Salem	5 hr
Apr 7, 7:03 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	5 hr
Apr 7, 7:52 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Somerset	10 hr
Apr 7, 5:01 PM EDT	Areal Flood Warning	PHI	Montgomery	13 hr

Nearby

Areal Flood Advisories in Pennsylvania, 2022 Areal Flood Advisories in New Jersey, 2022 Areal Flood Advisories in Delaware, 2022 Every areal flood advisory in 2022

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.