Alert archive / Maryland / Areal Flood Advisories in 2014

Areal Flood Advisory 280, NWS Philadelphia/Mount Holly

June 12, 2014Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 12, 2014, 2:20 PM EDT for Kent County, Queen Anne's County, Maryland. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jun 12, 2014, 2:20 PM EDT (18:20 UTC)
Expired: Jun 12, 2014, 6:15 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 18:23 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, 6.3 hours before the alert went out and 115 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: 195 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 12, 12:39 PM EDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jun 12, 12:39 PM EDT, 1 hour 41 minutes before

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Hazardous weather outlook, Jun 12, 5:26 AM EDT, 8 hours 54 minutes before

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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
Jun 12, 3:56 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester	20 hr
Jun 12, 5:30 PM EDT	Coastal Flood Advisory	PHI	Cape May, Cumberland	7 hr
Jun 12, 6:33 PM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jun 12, 12:54 AM EDT	Special Weather Statement	PHI	Caroline	66 min
Jun 12, 1:44 AM EDT	Areal Flood Advisory	PHI	Caroline, Talbot	4 hr
Jun 12, 2:07 AM EDT	Special Weather Statement	PHI	Caroline	53 min
Jun 12, 12:31 PM EDT	Areal Flood Advisory	PHI	Talbot	6 hr

Nearby

Areal Flood Advisories in Maryland, 2014 Every areal flood advisory in 2014

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.