Alert archive / South Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 1589

July 10, 200412 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2004, 11:02 AM MDT for 12 counties in South Dakota. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2004, 11:02 AM MDT (17:02 UTC)
Expired: Jul 10, 2004, 1:00 PM MDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Bennett County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Jackson County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 95 km from the middle of the area, began a volume at 17:03 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 596Jul 10, 11:25 AM MDT

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 5.0 hours before the alert went out and 100 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: 2410 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 3 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
Jul 9, 6:29 PM MDT	Mesoscale Discussion	SPC	Butte, Corson, Dewey, Haakon, Harding, Meade and 3 more	2 hr
Jul 10, 11:25 AM MDT	Severe Thunderstorm Watch	SPC	Bennett, Corson, Dewey, Haakon, Jackson, Jones and 10 more	7 hr
Jul 10, 2:35 PM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brookings, Brown, Brule, Buffalo and 26 more	85 min
Jul 10, 2:39 PM MDT	Mesoscale Discussion	SPC	Harding	2 hr
Jul 10, 2:56 PM MDT	Mesoscale Discussion	SPC	Harding	2 hr
Jul 10, 4:10 PM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Clark and 18 more	2 hr
Jul 10, 4:25 PM MDT	Severe Thunderstorm Watch	SPC	Aurora, Beadle, Brookings, Brown, Brule, Buffalo and 30 more	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2004 Every 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.