Alert archive / Ohio / Mesoscale Discussions in 2004
Mesoscale Discussion 550
The Storm Prediction Center issued this mesoscale discussion at May 1, 2004, 2:48 PM EDT for 4 states. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2004, 2:48 PM EDT (18:48 UTC)
- Expired
- May 1, 2004, 4:45 PM EDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 62 counties
Greenup County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Madison County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Beaver County, PA, Lawrence County, PA, Brooke County, WV, Hancock County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.8 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 103 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 626 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 8:59 PM EDT | Mesoscale Discussion | SPC | Barren, Breckinridge, Butler, Edmonson, Grayson, Hardin and 3 more | 61 min |
| May 1, 1:59 AM EDT | Mesoscale Discussion | SPC | Henderson, Union | 91 min |
| May 1, 1:36 PM EDT | Mesoscale Discussion | SPC | Allen, Anderson, Barren, Boone, Bourbon, Boyle and 57 more | 114 min |
| May 1, 12:56 PM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, Lycoming, Sullivan, Susquehanna, Tioga and 1 more | 2 hr |
Nearby
Mesoscale Discussions in Ohio, 2004Mesoscale Discussions in West Virginia, 2004Mesoscale Discussions in Pennsylvania, 2004Every mesoscale discussion in 2004
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.