Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 2284

August 27, 200313 counties in Indiana; 27 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2003, 9:47 AM EDT for 13 counties in Indiana; 27 counties in Ohio. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Aug 27, 2003, 9:47 AM EDT (13:47 UTC)
Expired: Aug 27, 2003, 11:45 AM EDT
In force: 118 min
Issued by: the Storm Prediction Center

All 40 counties

Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Hancock County, IN, Henry County, IN, Madison County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Union County, IN, Wayne County, IN, Athens County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Madison County, OH, Meigs County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Vinton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 38 km from the middle of the area, began a volume at 13:50 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 1.8 hours before the alert went out and 37 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: 2457 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1007 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.7

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, 2:15 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, DeKalb, LaGrange, Steuben	90 min
Aug 27, 2:35 AM EDT	Severe Thunderstorm Watch	SPC	DeKalb, LaGrange, Steuben	5 hr
Aug 27, 4:57 AM EDT	Mesoscale Discussion	SPC	DeKalb, Steuben	93 min
Aug 26, 9:20 PM EDT	Severe Thunderstorm Watch	SPC	Belmont, Jefferson	6 hr
Aug 27, 6:11 AM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Fairfield, Franklin, Guernsey, Hocking and 6 more	2 hr
Aug 27, 12:52 PM EDT	Mesoscale Discussion	SPC	Adams, Athens, Brown, Fairfield, Fayette, Franklin and 15 more	113 min
Aug 27, 2:05 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more	5 hr

Nearby

Mesoscale Discussions in Ohio, 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.