Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1052

May 17, 20035 counties in Nebraska; 19 counties in South Dakota; Goshen County, Niobrara County, Weston County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 17, 2003, 5:45 PM MDT for 5 counties in Nebraska; 19 counties in South Dakota; Goshen County, Niobrara County, Weston County, Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 17, 2003, 5:45 PM MDT (23:45 UTC)
Expired
May 17, 2003, 7:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 27 counties

Box Butte County, NE, Cherry County, NE, Dawes County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Goshen County, WY, Niobrara County, WY, Weston County, WY

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 11.8 hours before the alert went out and 129 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, Rapid City, SD at 12:00Z on 2003-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Rapid City, SD at 12:00Z on 2003-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
248 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 17, 2:23 PM MDTMesoscale DiscussionSPCBox Butte, Dawes, Sheridan, Sioux3 hr
May 17, 2:55 PM MDTSevere Thunderstorm WatchSPCBanner, Box Butte, Cherry, Dawes, Morrill, Scotts Bluff and 2 more6 hr

Nearby

Mesoscale Discussions in South Dakota, 2003Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Wyoming, 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.