Alert archive / Michigan / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 178, NWS Grand Rapids, MI

October 4, 2006Gratiot County, Isabella County, Montcalm County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Oct 4, 2006, 6:58 AM EDT for Gratiot County, Isabella County, Montcalm County, Michigan. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 4, 2006, 6:58 AM EDT (10:58 UTC)
Expired: Oct 4, 2006, 7:45 AM EDT
In force: 47 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

Counties Gratiot County, MI, Isabella County, MI, Montcalm County, MI

The radar

The Grand Rapids radar (KGRR), 80 km from the middle of the area, began a volume at 11:00 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

Detroit, MI (KDTX), launched 00:00Z, 11.0 hours before the alert went out and 140 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: 448 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 1044 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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.

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 3, 4:15 PM EDT, 14 hours 43 minutes earlier.

Area forecast discussion, Oct 3, 4:15 PM EDT, 14 hours 43 minutes before

<!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>

Hazardous weather outlook, Oct 3, 5:02 PM EDT, 13 hours 56 minutes before

<!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>

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 3, 9:37 PM EDT	Special Marine Warning	GRR		53 min
Oct 3, 10:11 PM EDT	Severe Thunderstorm Warning	GRR	Oceana	20 min
Oct 3, 10:23 PM EDT	Severe Thunderstorm Warning	GRR	Mason	25 min
Oct 3, 10:57 PM EDT	Severe Thunderstorm Warning	GRR	Lake	22 min
Oct 4, 12:06 AM EDT	Special Marine Warning	GRR		54 min
Oct 4, 12:49 AM EDT	Severe Thunderstorm Warning	GRR	Mason	56 min
Oct 4, 12:52 AM EDT	Severe Thunderstorm Warning	GRR	Lake	53 min
Oct 4, 12:56 AM EDT	Special Marine Warning	GRR		86 min
Oct 4, 1:07 AM EDT	Severe Thunderstorm Warning	GRR	Osceola	53 min
Oct 4, 1:33 AM EDT	Severe Thunderstorm Warning	GRR	Oceana	47 min
Oct 4, 1:35 AM EDT	Special Marine Warning	GRR		76 min
Oct 4, 1:59 AM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Newaygo	61 min
Oct 4, 2:06 AM EDT	Severe Thunderstorm Warning	GRR	Muskegon	34 min
Oct 4, 6:39 AM EDT	Special Marine Warning	GRR		53 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2006 Every severe thunderstorm warning 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.