Alert archive / Maryland / Wind Advisories in 2009

Wind Advisory 8, NWS Baltimore/Washington

November 11, 2009Anne Arundel County, Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this wind advisory at Nov 11, 2009, 11:47 AM EST for Anne Arundel County, Calvert County, Saint Mary's County, Maryland. It took effect at Nov 11, 2009, 6:00 PM EST. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued: Nov 11, 2009, 11:47 AM EST (16:47 UTC)
In effect from: Nov 11, 2009, 6:00 PM EST
Expired: Nov 13, 2009, 3:23 AM EST
In force: 33 hr
Issued by: NWS Baltimore/Washington

Counties Anne Arundel County, MD, Calvert County, MD, Saint Mary's County, MD

The radar

The Sterling radar (KLWX), 93 km from the middle of the area, began a volume at 16:51 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.8 hours before the alert went out and 123 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: 515 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: 202 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 wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this wind advisory went out at Nov 11, 11:36 AM EST, 11 minutes earlier.

Area forecast discussion, Nov 11, 11:36 AM EST, 11 minutes before

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Hazardous weather outlook, Nov 11, 5:01 AM EST, 6 hours 46 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.
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        Please try again in a few minutes.
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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 11, 4:08 AM EST	Gale Warning	LWX		62 hr
Nov 11, 4:31 AM EST	Coastal Flood Watch	LWX	Arlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more	47 hr
Nov 11, 8:36 AM EST	Small Craft Advisory	LWX		20 hr
Nov 11, 3:07 PM EST	Small Craft Advisory	LWX		67 hr
Nov 11, 5:46 PM EST	Winter Weather Advisory	LWX		11 hr

Nearby

Wind Advisories in Maryland, 2009 Every wind advisory in 2009

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.