Alert archive / Missouri / Heat Advisories in 2006

Heat Advisory 6, NWS St. Louis, MO

August 9, 200623 counties in Missouri; 11 counties in Illinois

NWS St. Louis, MO issued this heat advisory at Aug 9, 2006, 10:00 PM CDT for 23 counties in Missouri; 11 counties in Illinois. It took effect at Aug 10, 2006, 4:12 AM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Aug 9, 2006, 10:00 PM CDT (03:00 UTC)
In effect from: Aug 10, 2006, 4:12 AM CDT
Expired: Aug 10, 2006, 2:51 PM CDT
In force: 11 hr
Issued by: NWS St. Louis, MO

All 34 counties

Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Jersey County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Moniteau County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 21 km from the middle of the area, began a volume at 03:02 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

Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 346 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: 232 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this heat advisory went out at Aug 9, 7:15 PM CDT, 2 hours 45 minutes earlier.

Area forecast discussion, Aug 9, 7:15 PM CDT, 2 hours 45 minutes before

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Hazardous weather outlook, Aug 9, 8:21 PM CDT, 1 hour 39 minutes before

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  <meta charset="utf-8">
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  <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.
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The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 12:19 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Madison	41 min
Aug 10, 12:57 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Marion	48 min
Aug 10, 2:13 PM CDT	Flash Flood Warning	LSX	Jersey	4 hr

Nearby

Heat Advisories in Missouri, 2006 Heat Advisories in Illinois, 2006 Every heat advisory in 2006

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.