Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 2280

August 27, 20035 counties in Indiana; 30 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2003, 1:15 AM EST for 5 counties in Indiana; 30 counties in Ohio. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Aug 27, 2003, 1:15 AM EST (06:15 UTC)
Expired
Aug 27, 2003, 2:45 AM EST
In force
90 min
Issued by
the Storm Prediction Center
All 35 counties

Adams County, IN, Allen County, IN, DeKalb County, IN, LaGrange County, IN, Steuben County, IN, 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, Holmes County, OH, Huron County, OH, Lorain County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Tuscarawas County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 143 km from the middle of the area, began a volume at 06:17 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 6.3 hours before the alert went out and 165 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-pSkew-T log-p diagram, Detroit, MI at 00:00Z on 2003-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2002 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 00:00Z on 2003-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

IssuedProductOfficeCountiesLasted
Aug 27, 1:35 AM ESTSevere Thunderstorm WatchSPCDeKalb, LaGrange, Steuben5 hr
Aug 27, 3:57 AM ESTMesoscale DiscussionSPCDeKalb, Steuben93 min
Aug 27, 8:47 AM ESTMesoscale DiscussionSPCDearborn, Decatur, Delaware, Fayette, Franklin, Hancock and 7 more118 min
Aug 26, 8:20 PM ESTSevere Thunderstorm WatchSPCBelmont, Jefferson6 hr
Aug 27, 5:11 AM ESTMesoscale DiscussionSPCAthens, Belmont, Fairfield, Franklin, Guernsey, Hocking and 6 more2 hr
Aug 27, 11:52 AM ESTMesoscale DiscussionSPCAdams, Athens, Brown, Fairfield, Fayette, Franklin and 15 more113 min
Aug 27, 1:05 PM ESTSevere Thunderstorm WatchSPCAthens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more5 hr

Nearby

Mesoscale Discussions in Ohio, 2003Mesoscale Discussions in Indiana, 2003Every 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.