Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1091

May 23, 2003Logan County, Phillips County, Sedgwick County, Colorado; 26 counties in Nebraska; Todd County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 23, 2003, 7:56 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 26 counties in Nebraska; Todd County, South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 23, 2003, 7:56 PM MDT (01:56 UTC)
Expired
May 23, 2003, 9:30 PM MDT
In force
94 min
Issued by
the Storm Prediction Center
All 30 counties

Logan County, CO, Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Todd County, SD

The radar

The North Platte radar (KLNX), 105 km from the middle of the area, began a volume at 01:57 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.9 hours before the alert went out and 95 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, N. Platte/Lee Bi, NE at 00:00Z on 2003-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 295 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, N. Platte/Lee Bi, NE at 00:00Z on 2003-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
295 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
1088 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

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, 6:08 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Baca, Bent, Crowley, Denver and 13 more67 min
May 24, 12:05 PM MDTMesoscale DiscussionSPCLas Animas, Pueblo2 hr
May 24, 2:05 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Cheyenne, Crowley, Elbert, El Paso and 7 more6 hr
May 24, 2:43 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Washington, Yuma92 min
May 24, 4:57 PM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Crowley, Elbert, El Paso and 7 more93 min
May 23, 8:45 PM MDTSevere Thunderstorm WatchSPCBuffalo, Custer, Dawson, Franklin, Frontier, Gosper and 10 more5 hr
May 23, 9:27 PM MDTMesoscale DiscussionSPCCherry, Hooker, Thomas33 min
May 23, 10:18 PM MDTMesoscale DiscussionSPCBuffalo, Custer, Dawson, Franklin, Frontier, Furnas and 12 more117 min

Nearby

Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Colorado, 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.