Alert archive / Colorado / Mesoscale Discussions in 2004

Mesoscale Discussion 1675

July 14, 20045 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2004, 6:49 PM MDT for 5 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2004, 6:49 PM MDT (00:49 UTC)
Expired
Jul 14, 2004, 8:15 PM MDT
In force
86 min
Issued by
the Storm Prediction Center
All 40 counties

Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Carter County, MT, Powder River County, MT, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Campbell County, WY, Crook County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 126 km from the middle of the area, began a volume at 00:50 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 (KDNR), launched 00:00Z, 0.8 hours before the alert went out and 212 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 00:00Z on 2004-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 901 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 00:00Z on 2004-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -49 square meters per square second.1939Sfc1 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
901 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2402 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-49 m²/s²
0-3 km storm-relative helicity
-46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jul 15, 1:53 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Cheyenne, Denver and 13 more3 hr
Jul 15, 4:04 PM MDTMesoscale DiscussionSPCKit Carson, Phillips, Washington, Yuma86 min
Jul 15, 5:25 PM MDTSevere Thunderstorm WatchSPCPhillips, Sedgwick, Yuma7 hr
Jul 14, 8:39 PM MDTMesoscale DiscussionSPCDaniels, Richland, Roosevelt, Sheridan, Wibaux96 min
Jul 14, 9:07 PM MDTMesoscale DiscussionSPCCarter, Powder River53 min
Jul 15, 8:32 AM MDTMesoscale DiscussionSPCDakota, Dixon118 min
Jul 15, 10:55 AM MDTMesoscale DiscussionSPCAntelope, Boyd, Burt, Butler, Cass, Cedar and 26 more2 hr
Jul 15, 1:03 PM MDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Boyd, Brown, Cedar and 22 more2 hr
Jul 15, 2:00 PM MDTTornado WatchSPCAntelope, Boone, Boyd, Buffalo, Butler, Cedar and 23 more6 hr
Jul 15, 5:08 PM MDTMesoscale DiscussionSPCChase, Dawson, Dundy, Frontier, Furnas, Gosper and 4 more97 min
Jul 15, 4:41 PM MDTMesoscale DiscussionSPCBrookings, Clark, Codington, Day, Deuel, Grant and 10 more94 min
Jul 15, 5:00 PM MDTSevere Thunderstorm WatchSPCClark, Codington, Day, Deuel, Grant, Hamlin and 2 more5 hr

Nearby

Mesoscale Discussions in Colorado, 2004Mesoscale Discussions in Nebraska, 2004Mesoscale Discussions in South Dakota, 2004Every mesoscale discussion in 2004

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.