Alert archive / Minnesota / Areal Flood Advisories in 2011

Areal Flood Advisory 50, NWS Twin Cities, MN

August 6, 20114 counties in Minnesota

NWS Twin Cities, MN issued this areal flood advisory at Aug 6, 2011, 10:59 AM CDT for 4 counties in Minnesota. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Aug 6, 2011, 10:59 AM CDT (15:59 UTC)
Expired: Aug 6, 2011, 3:00 PM CDT
In force: 4 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Douglas County, MN, Mille Lacs County, MN, Morrison County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 149 km from the middle of the area, began a volume at 16:02 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

Minneapolis, MN (KMPX), launched 12:00Z, 4.0 hours before the alert went out and 147 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: 690 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Twin Cities, MN wrote its last area forecast discussion before this areal flood advisory went out at Aug 6, 6:07 AM CDT, 4 hours 52 minutes earlier.

Area forecast discussion, Aug 6, 6:07 AM CDT, 4 hours 52 minutes before

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Hazardous weather outlook, Aug 6, 3:42 AM CDT, 7 hours 17 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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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.
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      <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 Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 5, 10:55 PM CDT	Areal Flood Advisory	MPX	Kandiyohi, Meeker, Sherburne, Wright	3 hr
Aug 6, 11:59 AM CDT	Special Weather Statement	MPX	Morrison	61 min
Aug 6, 12:37 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs, Morrison	53 min
Aug 6, 1:20 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti, Kanabec	31 min
Aug 6, 2:35 PM CDT	Special Weather Statement	MPX	Anoka	25 min
Aug 6, 3:18 PM CDT	Special Weather Statement	MPX	Washington	27 min
Aug 6, 3:29 PM CDT	Severe Thunderstorm Warning	MPX	Ramsey, Washington	46 min
Aug 6, 5:36 PM CDT	Special Weather Statement	MPX	Douglas	24 min
Aug 6, 6:59 PM CDT	Special Weather Statement	MPX	Stearns	46 min
Aug 6, 2:58 PM CDT	Special Weather Statement	MPX	Barron	47 min
Aug 6, 4:00 PM CDT	Special Weather Statement	MPX	Saint Croix	45 min
Aug 6, 5:26 PM CDT	Special Weather Statement	MPX	Eau Claire	49 min

Nearby

Areal Flood Advisories in Minnesota, 2011 Every areal flood advisory in 2011

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.