Alert archive / Colorado / Mesoscale Discussions in 2008

Mesoscale Discussion 1201

June 4, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2008, 11:54 AM MDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Jun 4, 2008, 11:54 AM MDT (17:54 UTC)
Expired
Jun 4, 2008, 1:30 PM MDT
In force
96 min
Issued by
the Storm Prediction Center
All 23 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Elbert County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Banner County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Kimball County, NE, Scotts Bluff County, NE, Goshen County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 119 km from the middle of the area, began a volume at 17:53 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 5.9 hours before the alert went out and 91 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2008-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 266 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2008-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
266 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
675 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 12:42 PM MDTTornado WatchSPCAdams, Arapahoe, Denver, Douglas, Elbert, Kit Carson and 8 more7 hr
Jun 4, 2:26 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Denver, Elbert, Logan, Morgan and 5 more64 min
Jun 4, 5:08 PM MDTMesoscale DiscussionSPCPhillips, Washington, Yuma67 min
Jun 3, 6:23 PM MDTTornado WatchSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 20 more6 hr
Jun 3, 8:35 PM MDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 17 more115 min
Jun 3, 9:43 PM MDTMesoscale DiscussionSPCBrown, Clay, Cloud, Dickinson, Ellsworth, Geary and 20 more3 hr
Jun 3, 9:58 PM MDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford4 hr
Jun 4, 12:29 AM MDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Labette91 min
Jun 4, 1:46 PM MDTTornado WatchSPCJewell, Mitchell, Osborne, Phillips, Rooks, Smith6 hr
Jun 4, 1:25 PM MDTMesoscale DiscussionSPCAdams, Boone, Buffalo, Butler, Clay, Colfax and 30 more65 min
Jun 4, 3:09 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Butler, Cass and 42 more66 min
Jun 4, 4:40 PM MDTTornado WatchSPCBurt, Cuming, Dodge, Washington6 hr
Jun 4, 5:47 PM MDTMesoscale DiscussionSPCAdams, Boone, Buffalo, Burt, Butler, Cass and 36 more58 min

Nearby

Mesoscale Discussions in Colorado, 2008Mesoscale Discussions in Nebraska, 2008Mesoscale Discussions in Wyoming, 2008Every mesoscale discussion in 2008

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.