Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Baltimore/Washington

August 2, 2012Howard County, Maryland

NWS Baltimore/Washington issued this special weather statement at Aug 2, 2012, 3:39 PM EDT for Howard County, Maryland. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 2, 2012, 3:39 PM EDT (19:39 UTC)
Expired: Aug 2, 2012, 4:15 PM EDT
In force: 36 min
Issued by: NWS Baltimore/Washington

County Howard County, MD

The radar

The Sterling radar (KLWX), 63 km from the middle of the area, began a volume at 19:39 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, 7.7 hours before the alert went out and 56 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: 1796 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 2, 3:18 PM EDT, 21 minutes earlier.

Area forecast discussion, Aug 2, 3:18 PM EDT, 21 minutes before

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Hazardous weather outlook, Aug 2, 11:06 AM EDT, 4 hours 33 minutes before

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In the hours before

Local storm report, Aug 2, 12:06 PM EDT, 3 hours 33 minutes before

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Local storm report, Aug 2, 2:02 PM EDT, 1 hour 37 minutes before

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Local storm report, Aug 2, 2:16 PM EDT, 1 hour 23 minutes before

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Special weather statement, Aug 2, 2:40 PM EDT, 59 minutes before

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Special weather statement, Aug 2, 3:06 PM EDT, 33 minutes before

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Special weather statement, Aug 2, 3:39 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 8:42 PM EDT	Severe Thunderstorm Warning	LWX	Shenandoah	38 min
Aug 1, 8:54 PM EDT	Coastal Flood Advisory	LWX	Arlington, City of Alexandria, City of Falls Church	14 hr
Aug 1, 10:10 PM EDT	Special Weather Statement	LWX	Prince William, City of Manassas, City of Manassas Park	35 min
Aug 2, 4:02 PM EDT	Special Marine Warning	LWX		69 min
Aug 2, 4:30 PM EDT	Special Weather Statement	LWX	King George	30 min
Aug 2, 4:32 PM EDT	Special Marine Warning	LWX		28 min
Aug 2, 4:40 PM EDT	Special Marine Warning	LWX		65 min
Aug 2, 5:38 PM EDT	Special Marine Warning	LWX		52 min
Aug 2, 6:10 PM EDT	Special Marine Warning	LWX		69 min
Aug 2, 2:40 PM EDT	Special Weather Statement	LWX	Prince George's	35 min
Aug 2, 2:55 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	18 min
Aug 2, 4:00 PM EDT	Special Weather Statement	LWX	Anne Arundel	30 min
Aug 2, 4:28 PM EDT	Special Weather Statement	LWX	City of Baltimore	32 min
Aug 2, 4:52 PM EDT	Special Weather Statement	LWX	City of Baltimore	23 min
Aug 2, 5:12 PM EDT	Special Weather Statement	LWX	Saint Mary's	33 min
Aug 1, 8:20 PM EDT	Special Weather Statement	LWX	Hardy	25 min

Nearby

Special Weather Statements in Maryland, 2012 Every special weather statement in 2012

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.