Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1634

July 5, 20037 counties in Iowa; 53 counties in Nebraska; 14 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2003, 6:42 PM CDT for 7 counties in Iowa; 53 counties in Nebraska; 14 counties in South Dakota. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Jul 5, 2003, 6:42 PM CDT (23:42 UTC)
Expired
Jul 5, 2003, 8:15 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 74 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Page County, IA, Pottawattamie County, IA, Woodbury County, IA, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Cherry County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Garfield County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Keya Paha County, NE, Knox County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thomas County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, York County, NE, Bennett County, SD, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Douglas County, SD, Gregory County, SD, Hutchinson County, SD, Lincoln County, SD, Oglala Lakota County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 23:45 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

Omaha, NE (KOAX), launched 12:00Z, 11.7 hours before the alert went out and 250 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, Omaha, NE at 12:00Z on 2003-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1131 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, Omaha, NE at 12:00Z on 2003-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
1131 J/kg
Mixed-layer CIN
-343 J/kg
Mixed-layer LCL
1373 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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, 8:43 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 20 more62 min
Jul 4, 9:05 PM CDTTornado WatchSPCAudubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 31 more6 hr
Jul 4, 10:45 PM CDTMesoscale DiscussionSPCAdair, Audubon, Benton, Black Hawk, Bremer, Buchanan and 68 more90 min
Jul 4, 11:25 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 56 more7 hr
Jul 5, 2:31 AM CDTMesoscale DiscussionSPCCedar, Clayton, Clinton, Delaware, Des Moines, Dubuque and 10 more89 min
Jul 5, 12:19 PM CDTMesoscale DiscussionSPCHarrison, Monona2 hr
Jul 5, 3:10 PM CDTSevere Thunderstorm WatchSPCHarrison, Mills, Monona, Plymouth, Pottawattamie, Woodbury7 hr
Jul 5, 5:18 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 37 more57 min
Jul 5, 5:55 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 30 more6 hr
Jul 4, 7:20 PM CDTSevere Thunderstorm WatchSPCAntelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more5 hr
Jul 4, 9:52 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more83 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, 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, 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 Nebraska, 2003Mesoscale Discussions in South Dakota, 2003Mesoscale Discussions in Iowa, 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.