Alert archive / Ohio / Mesoscale Discussions in 2007
Mesoscale Discussion 1819
The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2007, 4:24 PM EDT for 5 states. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2007, 4:24 PM EDT (20:24 UTC)
- Expired
- Aug 20, 2007, 5:30 PM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 87 counties
Dearborn County, IN, Ohio County, IN, Switzerland County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Kenton County, KY, Mason County, KY, Pendleton County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Licking County, OH, Madison County, OH, Meigs County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Cincinnati radar (KILN), 129 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 127 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
- 579 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 924 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 12:18 PM EDT | Mesoscale Discussion | SPC | Adams, Blackford, Delaware, Fayette, Grant, Hamilton and 12 more | 117 min |
| Aug 20, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more | 7 hr |
| Aug 20, 7:11 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Franklin, Fulton, Somerset, York | 94 min |
Nearby
Mesoscale Discussions in Ohio, 2007Mesoscale Discussions in West Virginia, 2007Mesoscale Discussions in Kentucky, 2007Every mesoscale discussion in 2007
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.