Alert archive / Colorado / Wind Advisories in 2018

Wind Advisory 6, NWS Grand Junction, CO

April 11, 201815 counties in Colorado; Grand County, San Juan County, Uintah County, Utah

NWS Grand Junction, CO issued this wind advisory at Apr 11, 2018, 5:05 PM MDT for 15 counties in Colorado; Grand County, San Juan County, Uintah County, Utah. It took effect at Apr 12, 2018, 2:04 AM MDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Apr 11, 2018, 5:05 PM MDT (23:05 UTC)
In effect from: Apr 12, 2018, 2:04 AM MDT
Expired: Apr 12, 2018, 8:00 PM MDT
In force: 18 hr
Issued by: NWS Grand Junction, CO

Counties Archuleta County, CO, Delta County, CO, Dolores County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, La Plata County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT, Uintah County, UT

The radar

The Grand Junction radar (KGJX), 28 km from the middle of the area, began a volume at 23:10 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

Denver, CO (KDEN), launched 12:00Z, 11.1 hours before the alert went out and 435 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3948 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 175 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 wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Junction, CO wrote its last area forecast discussion before this wind advisory went out at Apr 11, 4:04 PM MDT, 1 hour 1 minute earlier.

Area forecast discussion, Apr 11, 4:04 PM MDT, 1 hour 1 minute before

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Hazardous weather outlook, Apr 11, 5:05 AM MDT, 12 hours before

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</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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        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 Grand Junction, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 11, 2:34 PM MDT	Red Flag Warning	GJT	Archuleta, Dolores, Garfield, Hinsdale, La Plata, Mesa and 4 more	29 hr
Apr 11, 3:02 PM MDT	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Hinsdale, Mesa and 7 more	52 hr

Nearby

Wind Advisories in Colorado, 2018 Wind Advisories in Utah, 2018 Every wind advisory in 2018

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.