Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1616

July 4, 200315 counties in Nebraska; 19 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2003, 9:52 PM CDT for 15 counties in Nebraska; 19 counties in South Dakota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jul 4, 2003, 9:52 PM CDT (02:52 UTC)
Expired
Jul 4, 2003, 11:15 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 34 counties

Antelope County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Garfield County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD

The radar

The North Platte radar (KLNX), 157 km from the middle of the area, began a volume at 02:54 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.9 hours before the alert went out and 214 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 00:00Z on 2003-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 333 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 00:00Z on 2003-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.1939587897117Sfc1 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
333 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
2027 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 4, 7:20 PM CDTSevere Thunderstorm WatchSPCAntelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more5 hr
Jul 4, 8:43 PM CDTMesoscale DiscussionSPCBurt, Butler, Cass, Colfax, Cuming, Dakota and 19 more62 min
Jul 4, 9:05 PM CDTTornado WatchSPCAdams, Boone, Burt, Butler, Cass, Cedar and 39 more6 hr
Jul 4, 10:45 PM CDTMesoscale DiscussionSPCAdams, Boone, Burt, Butler, Cass, Cedar and 28 more90 min
Jul 4, 11:21 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boyd, Brown, Garfield, Holt and 6 more24 min
Jul 5, 6:44 AM CDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Brown, Cherry, Garfield and 12 more2 hr
Jul 5, 12:19 PM CDTMesoscale DiscussionSPCAntelope, Boone, Buffalo, Burt, Butler, Cass and 30 more2 hr
Jul 5, 3:10 PM CDTSevere Thunderstorm WatchSPCAntelope, Blaine, Boone, Boyd, Brown, Buffalo and 47 more7 hr
Jul 5, 3:23 PM CDTMesoscale DiscussionSPCChase, Dundy, Frontier, Hayes, Hitchcock, Red Willow2 hr
Jul 5, 3:45 PM CDTSevere Thunderstorm WatchSPCChase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more6 hr
Jul 5, 5:06 PM CDTMesoscale DiscussionSPCChase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more84 min
Jul 5, 6:42 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Boyd, Brown, Buffalo and 47 more93 min
Jul 5, 4:10 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Clark, Dewey and 20 more65 min
Jul 5, 4:35 PM CDTSevere Thunderstorm WatchSPCBennett, Brule, Buffalo, Butte, Campbell, Charles Mix and 28 more5 hr

Nearby

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