Alert archive / Maryland / Tornado Warnings in 2010

Tornado Warning 31, NWS Baltimore/Washington

December 1, 2010Charles County, Prince George's County, Maryland

NWS Baltimore/Washington issued this tornado warning at Dec 1, 2010, 9:28 AM EST for Charles County, Prince George's County, Maryland. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 1, 2010, 9:28 AM EST (14:28 UTC)
Expired: Dec 1, 2010, 9:45 AM EST
In force: 17 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Charles County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 60 km from the middle of the area, began a volume at 14:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 1, 3:48 AM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 2.5 hours before the alert went out and 53 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: 13 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 280 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 tornado warning 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 tornado warning went out at Dec 1, 9:00 AM EST, 28 minutes earlier.

Area forecast discussion, Dec 1, 9:00 AM EST, 28 minutes before

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Hazardous weather outlook, Dec 1, 9:15 AM EST, 13 minutes before

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In the hours before

Local storm report, Dec 1, 8:12 AM EST, 1 hour 16 minutes before

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Local storm report, Dec 1, 8:22 AM EST, 1 hour 6 minutes before

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Local storm report, Dec 1, 8:25 AM EST, 1 hour 3 minutes before

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Local storm report, Dec 1, 9:02 AM EST, 26 minutes before

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Local storm report, Dec 1, 9:04 AM EST, 24 minutes before

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Local storm report, Dec 1, 9:05 AM EST, 23 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
Dec 1, 2:05 AM EST	Flash Flood Warning	LWX	Highland	8 hr
Dec 1, 2:43 AM EST	Flash Flood Warning	LWX	Albemarle, Augusta, Nelson, City of Charlottesville, City of Staunton, City of Waynesboro	6 hr
Dec 1, 2:55 AM EST	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Nelson, City of Charlottesville	65 min
Dec 1, 3:06 AM EST	High Wind Warning	LWX	Greene, Madison, Nelson, Page, Rappahannock, Rockingham and 4 more	3 hr
Dec 1, 3:21 AM EST	Tornado Warning	LWX	Albemarle, Nelson, City of Charlottesville	24 min
Dec 1, 3:28 AM EST	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Culpeper, Greene, Madison, Orange and 3 more	47 min
Dec 1, 4:06 AM EST	Severe Thunderstorm Warning	LWX	Albemarle, Culpeper, Greene, Madison, Orange, Rappahannock and 1 more	54 min
Dec 1, 4:29 AM EST	Flash Flood Warning	LWX	Clarke, Frederick, Greene, Page, Rockingham, Shenandoah and 3 more	6 hr
Dec 1, 4:34 AM EST	Flash Flood Warning	LWX	Culpeper, Fauquier, Greene, Madison, Orange, Rappahannock	6 hr
Dec 1, 4:58 AM EST	Severe Thunderstorm Warning	LWX	Culpeper, Fairfax, Fauquier, Loudoun, Orange, Prince William and 6 more	47 min
Dec 1, 5:44 AM EST	Severe Thunderstorm Warning	LWX	Fairfax, Fauquier, Loudoun, Prince William, City of Manassas, City of Manassas Park	26 min
Dec 1, 6:01 AM EST	Special Weather Statement	LWX	Arlington, Fairfax, Loudoun, Prince William, City of Alexandria, City of Fairfax and 3 more	119 min
Dec 1, 7:25 AM EST	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	35 min
Dec 1, 9:37 AM EST	Special Weather Statement	LWX	Arlington, City of Alexandria, City of Falls Church	23 min
Dec 1, 10:02 AM EST	Areal Flood Warning	LWX	Frederick, Rockingham, Shenandoah	3 hr
Dec 1, 11:16 AM EST	Gale Warning	LWX		3 hr
Dec 1, 11:16 AM EST	Small Craft Advisory	LWX		30 hr
Dec 1, 4:18 AM EST	Flash Flood Warning	LWX	Allegany, Washington	6 hr
Dec 1, 4:22 AM EST	Severe Thunderstorm Warning	LWX	Allegany, Washington	22 min
Dec 1, 5:25 AM EST	Coastal Flood Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	9 hr
Dec 1, 6:20 AM EST	Special Weather Statement	LWX	Harford	10 min
Dec 1, 6:37 AM EST	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	53 min
Dec 1, 8:03 AM EST	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery	42 min
Dec 1, 9:00 AM EST	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Harford, Howard, City of Baltimore	75 min
Dec 1, 9:43 AM EST	Special Weather Statement	LWX	Anne Arundel, Calvert, Prince George's, Saint Mary's	62 min
Dec 1, 2:37 PM EST	River Flood Warning	LWX	Washington	26 hr

Nearby

Tornado Warnings in Maryland, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.