Alert archive / Colorado / Mesoscale Discussions in 2003

Mesoscale Discussion 1083

May 23, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 23, 2003, 1:54 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 23, 2003, 1:54 PM MDT (19:54 UTC)
Expired
May 23, 2003, 4:00 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 29 counties

Adams County, CO, Arapahoe County, CO, Denver County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Oglala Lakota County, SD, Pennington County, SD, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 134 km from the middle of the area, began a volume at 19:57 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, 7.9 hours before the alert went out and 144 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 2003-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 2003-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
24 J/kg
Mixed-layer CIN
-367 J/kg
Mixed-layer LCL
1770 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
60 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 23, 11:41 AM MDTMesoscale DiscussionSPCCrowley, Elbert, El Paso, Las Animas, Lincoln, Otero and 1 more3 hr
May 23, 1:55 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more5 hr
May 23, 2:30 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Denver, Douglas, Elbert, El Paso and 5 more5 hr
May 23, 4:32 PM MDTMesoscale DiscussionSPCBaca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more88 min
May 23, 4:54 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Denver, Douglas, Elbert, El Paso and 5 more96 min
May 22, 7:48 PM MDTMesoscale DiscussionSPCArthur, Chase, Dawson, Dundy, Frontier, Furnas and 9 more87 min
May 23, 3:48 PM MDTMesoscale DiscussionSPCBoyd, Brown, Garfield, Holt, Keya Paha, Loup and 1 more57 min
May 23, 4:25 PM MDTSevere Thunderstorm WatchSPCCherry, Grant, Hooker, Sheridan, Thomas6 hr
May 23, 5:50 PM MDTMesoscale DiscussionSPCCherry, Grant, Hooker, Sheridan, Thomas85 min

Nearby

Mesoscale Discussions in Colorado, 2003Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in South Dakota, 2003Every mesoscale discussion in 2003

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.