Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 2281

August 27, 2003DeKalb County, Steuben County, Indiana; 5 counties in Michigan; 23 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2003, 3:57 AM EST for DeKalb County, Steuben County, Indiana; 5 counties in Michigan; 23 counties in Ohio. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Aug 27, 2003, 3:57 AM EST (08:57 UTC)
Expired: Aug 27, 2003, 5:30 AM EST
In force: 93 min
Issued by: the Storm Prediction Center

All 30 counties

DeKalb County, IN, Steuben County, IN, Branch County, MI, Hillsdale County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Allen County, OH, Ashland County, OH, Crawford County, OH, Defiance County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Lucas County, OH, Marion County, OH, Medina County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Detroit radar (KDTX), 141 km from the middle of the area, began a volume at 09:01 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

Detroit, MI (KDTX), launched 00:00Z, 9.0 hours before the alert went out and 144 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: 2002 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1077 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.2

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
Aug 27, 1:15 AM EST	Mesoscale Discussion	SPC	Adams, Allen, DeKalb, LaGrange, Steuben	90 min
Aug 27, 1:35 AM EST	Severe Thunderstorm Watch	SPC	DeKalb, LaGrange, Steuben	5 hr
Aug 27, 8:47 AM EST	Mesoscale Discussion	SPC	Dearborn, Decatur, Delaware, Fayette, Franklin, Hancock and 7 more	118 min
Aug 26, 8:20 PM EST	Severe Thunderstorm Watch	SPC	Belmont, Jefferson	6 hr
Aug 27, 5:11 AM EST	Mesoscale Discussion	SPC	Athens, Belmont, Fairfield, Franklin, Guernsey, Hocking and 6 more	2 hr
Aug 27, 11:52 AM EST	Mesoscale Discussion	SPC	Adams, Athens, Brown, Fairfield, Fayette, Franklin and 15 more	113 min
Aug 27, 1:05 PM EST	Severe Thunderstorm Watch	SPC	Athens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more	5 hr

Nearby

Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Michigan, 2003 Mesoscale Discussions in Indiana, 2003 Every mesoscale discussion in 2003

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.