Alert archive / Colorado / Blowing Snow Advisories in 2007

Blowing Snow Advisory 4, NWS Denver/Boulder, CO

February 2, 20077 counties in Colorado

NWS Denver/Boulder, CO issued this blowing snow advisory at Feb 2, 2007, 3:07 PM MST for 7 counties in Colorado. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Feb 2, 2007, 3:07 PM MST (22:07 UTC)
Expired: Feb 3, 2007, 5:06 AM MST
In force: 14 hr
Issued by: NWS Denver/Boulder, CO

Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO

The radar

The Denver radar (KFTG), 74 km from the middle of the area, began a volume at 22:07 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.1 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: 1210 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 84 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 blowing snow advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this blowing snow advisory went out at Feb 2, 3:45 AM MST, 11 hours 22 minutes earlier.

Area forecast discussion, Feb 2, 3:45 AM MST, 11 hours 22 minutes before

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Hazardous weather outlook, Feb 2, 10:53 AM MST, 4 hours 14 minutes 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 Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 1, 11:22 PM MST	Wind Chill Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more	11 hr
Feb 2, 9:04 AM MST	Blowing Snow Advisory	BOU	Boulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 1 more	6 hr
Feb 2, 9:04 AM MST	Snow and Blowing Snow Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	20 hr

Nearby

Blowing Snow Advisories in Colorado, 2007 Every blowing snow advisory in 2007

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.