Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1619

July 4, 200312 counties in Nebraska; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2003, 11:21 PM CDT for 12 counties in Nebraska; 8 counties in South Dakota. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued: Jul 4, 2003, 11:21 PM CDT (04:21 UTC)
Expired: Jul 4, 2003, 11:45 PM CDT
In force: 24 min
Issued by: the Storm Prediction Center

Counties Antelope County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE, Bon Homme County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, McCook County, SD, Moody County, SD, Turner County, SD, Yankton County, SD

The radar

The North Platte radar (KLNX), 138 km from the middle of the area, began a volume at 04:24 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.4 hours before the alert went out and 207 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: 2232 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1773 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: -92 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -4.3

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 4, 7:20 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	5 hr
Jul 4, 8:43 PM CDT	Mesoscale Discussion	SPC	Burt, Butler, Cass, Colfax, Cuming, Dakota and 19 more	62 min
Jul 4, 9:05 PM CDT	Tornado Watch	SPC	Adams, Boone, Burt, Butler, Cass, Cedar and 39 more	6 hr
Jul 4, 9:52 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	83 min
Jul 4, 10:45 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Burt, Butler, Cass, Cedar and 28 more	90 min
Jul 5, 6:44 AM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Brown, Cherry, Garfield and 12 more	2 hr
Jul 5, 12:19 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Buffalo, Burt, Butler, Cass and 30 more	2 hr
Jul 5, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 47 more	7 hr
Jul 5, 3:23 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Red Willow	2 hr
Jul 5, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more	6 hr
Jul 5, 5:06 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more	84 min
Jul 5, 6:42 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 47 more	93 min
Jul 5, 4:10 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brule, Buffalo, Clark, Dewey and 20 more	65 min
Jul 5, 4:35 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Brule, Buffalo, Butte, Campbell, Charles Mix and 28 more	5 hr

Nearby

Mesoscale Discussions in Nebraska, 2003 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.