Alert archive / Maryland / Coastal Flood Advisories in 2011

Coastal Flood Advisory 51, NWS Philadelphia/Mount Holly

September 30, 20114 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood advisory at Sep 30, 2011, 6:21 PM EDT for 4 counties in Maryland. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Sep 30, 2011, 6:21 PM EDT (22:21 UTC)
Expired: Sep 30, 2011, 9:24 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly

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

The radar

The Dover AFB radar (KDOX), 55 km from the middle of the area, began a volume at 22:25 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.4 hours before the alert went out and 55 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: 1205 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 155 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 coastal 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 coastal flood advisory went out at Sep 30, 6:03 PM EDT, 18 minutes earlier.

Area forecast discussion, Sep 30, 6:03 PM EDT, 18 minutes before

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Hazardous weather outlook, Sep 30, 5:58 PM EDT, 23 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
Sep 29, 9:32 PM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester	8 hr
Sep 30, 3:40 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	13 hr
Sep 30, 11:22 AM EDT	Coastal Flood Warning	PHI	Burlington, Camden, Mercer	8 hr
Sep 30, 3:49 PM EDT	Small Craft Advisory	PHI		24 hr
Sep 30, 7:40 PM EDT	Special Marine Warning	PHI		50 min
Sep 30, 7:45 PM EDT	Special Weather Statement	PHI	Cape May	60 min
Sep 30, 7:50 PM EDT	Special Marine Warning	PHI		55 min
Sep 30, 5:33 PM EDT	Coastal Flood Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	48 min

Nearby

Coastal Flood Advisories in Maryland, 2011 Every coastal flood advisory in 2011

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.