Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 1609

July 4, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2003, 3:29 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 4, 2003, 3:29 PM CDT (20:29 UTC)
Expired
Jul 4, 2003, 5:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 117 counties

Champaign County, IL, DeWitt County, IL, Douglas County, IL, Ford County, IL, Iroquois County, IL, Kankakee County, IL, Logan County, IL, Macon County, IL, Piatt County, IL, Vermilion County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Pulaski County, IN, Randolph County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allen County, OH, Ashland County, OH, Auglaize County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hardin County, OH, Harrison County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Paulding County, OH, Perry County, OH, Pickaway County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Clarion County, PA, Clearfield County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Somerset County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV

The radar

The Cincinnati radar (KILN), 130 km from the middle of the area, began a volume at 20:29 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 129 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, Cncnati-Daytn, OH at 12:00Z on 2003-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 718 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, Cncnati-Daytn, OH at 12:00Z on 2003-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939Sfc1 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
718 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1115 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Jul 4, 1:15 AM CDTSevere Thunderstorm WatchSPCCarroll, Jo Daviess, Lee, Ogle, Rock Island, Stephenson and 2 more6 hr
Jul 4, 3:27 AM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Grundy and 12 more93 min
Jul 4, 5:20 AM CDTSevere Thunderstorm WatchSPCBoone, Cook, DeKalb, DuPage, Kane, Lake and 1 more4 hr
Jul 4, 7:25 AM CDTMesoscale DiscussionSPCCook, Lake, McHenry95 min
Jul 4, 12:48 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 26 more117 min
Jul 4, 2:20 PM CDTSevere Thunderstorm WatchSPCBureau, Champaign, DeWitt, Ford, Fulton, Grundy and 21 more6 hr
Jul 4, 5:07 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 27 more53 min
Jul 4, 6:29 PM CDTMesoscale DiscussionSPCBureau, Champaign, Clark, Coles, DeWitt, Douglas and 29 more61 min
Jul 4, 7:50 AM CDTSevere Thunderstorm WatchSPCElkhart, LaGrange, LaPorte, Saint Joseph, Steuben3 hr
Jul 4, 9:28 AM CDTMesoscale DiscussionSPCDeKalb, Elkhart, Kosciusko, LaGrange, Noble, Steuben2 hr
Jul 4, 12:04 PM CDTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Kosciusko, LaGrange, LaPorte and 7 more116 min
Jul 4, 1:45 PM CDTMesoscale DiscussionSPCAdams, Allen, DeKalb, Whitley60 min
Jul 4, 5:50 PM CDTSevere Thunderstorm WatchSPCBartholomew, Brown, Clay, Daviess, Dearborn, Decatur and 29 more5 hr
Jul 4, 9:45 AM CDTSevere Thunderstorm WatchSPCAshland, Ashtabula, Carroll, Columbiana, Cuyahoga, Defiance and 20 more5 hr
Jul 4, 2:05 PM CDTSevere Thunderstorm WatchSPCAllen, Ashland, Auglaize, Carroll, Champaign, Clark and 47 more6 hr

Nearby

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