Alert archive / Maryland / Mesoscale Discussions in 2005

Mesoscale Discussion 1209

June 6, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2005, 6:34 PM EDT for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2005, 6:34 PM EDT (22:34 UTC)
Expired: Jun 6, 2005, 8:00 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Kent County, DE, New Castle County, DE, Anne Arundel County, MD, Baltimore County, MD, Cecil County, MD, City of Baltimore, MD, Harford County, MD, Howard County, MD, Kent County, MD, Queen Anne's County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 90 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 2 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: 477 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Kent, New Castle	8 hr
Jun 6, 5:00 PM EDT	Mesoscale Discussion	SPC	New Castle	90 min
Jun 6, 12:46 PM EDT	Mesoscale Discussion	SPC	Allegany, Garrett	59 min
Jun 6, 1:00 PM EDT	Severe Thunderstorm Watch	SPC	Garrett	7 hr
Jun 6, 1:34 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more	56 min
Jun 6, 5:32 PM EDT	Mesoscale Discussion	SPC	Garrett	88 min
Jun 6, 10:28 AM EDT	Mesoscale Discussion	SPC	Bergen, Essex, Hudson, Hunterdon, Morris, Passaic and 4 more	62 min
Jun 6, 4:35 PM EDT	Mesoscale Discussion	SPC	Bergen, Essex, Hudson, Hunterdon, Mercer, Middlesex and 4 more	55 min
Jun 5, 10:28 PM EDT	Mesoscale Discussion	SPC	Beaver, Crawford, Erie, Lawrence, Mercer	92 min
Jun 6, 8:35 AM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Blair, Butler, Cambria and 19 more	115 min
Jun 6, 9:30 AM EDT	Severe Thunderstorm Watch	SPC	Bedford, Blair, Bradford, Cambria, Cameron, Carbon and 28 more	9 hr
Jun 6, 12:30 PM EDT	Tornado Watch	SPC	Bradford, Columbia, Lackawanna, Luzerne, Montour, Sullivan and 3 more	6 hr

Nearby

Mesoscale Discussions in Maryland, 2005 Mesoscale Discussions in New Jersey, 2005 Mesoscale Discussions in Pennsylvania, 2005 Every mesoscale discussion in 2005

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.