Alert archive / South Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 1629

July 12, 20048 counties in Minnesota; Dickey County, McIntosh County, Sargent County, North Dakota; 36 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2004, 8:53 AM CDT for 8 counties in Minnesota; Dickey County, McIntosh County, Sargent County, North Dakota; 36 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 12, 2004, 8:53 AM CDT (13:53 UTC)
Expired
Jul 12, 2004, 11:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 47 counties

Big Stone County, MN, Grant County, MN, Lac qui Parle County, MN, Lincoln County, MN, Pipestone County, MN, Rock County, MN, Stevens County, MN, Traverse County, MN, Dickey County, ND, McIntosh County, ND, Sargent County, ND, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, Marshall County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 31 km from the middle of the area, began a volume at 13:54 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

Aberdeen, SD (KABR), launched 12:00Z, 1.9 hours before the alert went out and 32 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, Aberdeen, SD at 12:00Z on 2004-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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, Aberdeen, SD at 12:00Z on 2004-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -106 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
12 J/kg
Mixed-layer CIN
-517 J/kg
Mixed-layer LCL
2141 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
-106 m²/s²
0-3 km storm-relative helicity
109 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
Jul 12, 1:29 AM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Kittson, Mahnomen and 7 more91 min
Jul 12, 1:55 AM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 19 more5 hr
Jul 12, 3:13 AM CDTMesoscale DiscussionSPCBecker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 19 more92 min
Jul 12, 4:53 AM CDTMesoscale DiscussionSPCBecker, Cass, Clay, Clearwater, Crow Wing, Douglas and 9 more67 min
Jul 12, 10:55 AM CDTSevere Thunderstorm WatchSPCBig Stone, Chippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon and 5 more5 hr
Jul 12, 6:20 PM CDTTornado WatchSPCJackson, Nobles, Rock7 hr
Jul 11, 7:20 PM CDTSevere Thunderstorm WatchSPCAdams, Billings, Bottineau, Bowman, Burke, Divide and 16 more8 hr
Jul 11, 9:19 PM CDTMesoscale DiscussionSPCAdams, Billings, Burke, Divide, Dunn, Golden Valley and 12 more116 min
Jul 11, 9:40 PM CDTSevere Thunderstorm WatchSPCGolden Valley5 hr
Jul 11, 11:34 PM CDTMesoscale DiscussionSPCAdams, Benson, Billings, Bottineau, Burke, Burleigh and 30 more116 min
Jul 11, 11:50 PM CDTSevere Thunderstorm WatchSPCBarnes, Benson, Burleigh, Cavalier, Dickey, Eddy and 17 more6 hr
Jul 11, 9:54 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Charles Mix, Davison and 12 more3 hr
Jul 12, 2:04 PM CDTMesoscale DiscussionSPCAurora, Bon Homme, Brule, Buffalo, Charles Mix, Davison and 12 more116 min
Jul 12, 3:25 PM CDTTornado WatchSPCAurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 10 more6 hr

Nearby

Mesoscale Discussions in South Dakota, 2004Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in North Dakota, 2004Every 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.