Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 9, NWS Detroit, MI

May 6, 1986Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 6, 1986, 8:11 PM EDT for Shiawassee County, Michigan. It was in force for 49 min.

The area

The counties it named.

The facts

Issued: May 6, 1986, 8:11 PM EDT (00:11 UTC)
Expired: May 6, 1986, 9:00 PM EDT
In force: 49 min
Issued by: NWS Detroit, MI
Area: Whole counties

County Shiawassee County, MI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Detroit, MI (KFNT), launched 00:00Z, 0.2 hours before the alert went out and 64 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: 1882 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

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

In the hours before

Special weather statement, May 6, 2:14 PM EDT, 5 hours 57 minutes before

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Local storm report, May 6, 3:44 PM EDT, 4 hours 27 minutes before

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Special weather statement, May 6, 3:55 PM EDT, 4 hours 16 minutes before

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<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.
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        Please try again in a few minutes.
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        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 Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 8:19 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	41 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1986 Every severe thunderstorm warning in 1986

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.