Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 711

May 3, 200330 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 3, 2003, 5:09 PM CDT for 30 counties in South Dakota. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 3, 2003, 5:09 PM CDT (22:09 UTC)
Expired: May 3, 2003, 6:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 30 counties

Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Meade County, SD, Mellette County, SD, Potter County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Aberdeen radar (KABR), 186 km from the middle of the area, began a volume at 22:08 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.

Severe Thunderstorm Watch 226May 3, 6:10 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.2 hours before the alert went out and 173 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1858 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 205 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.

Issued	Product	Office	Counties	Lasted
May 3, 12:48 PM CDT	Mesoscale Discussion	SPC	Custer, Fall River, Lawrence	2 hr
May 3, 6:10 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Campbell, Corson, Dewey, Edmunds, Faulk and 17 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2003 Every 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.