Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 2361

September 10, 200324 counties in Nebraska; 17 counties in South Dakota; Goshen County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Sep 10, 2003, 12:31 AM MDT for 24 counties in Nebraska; 17 counties in South Dakota; Goshen County, Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 10, 2003, 12:31 AM MDT (06:31 UTC)
Expired
Sep 10, 2003, 3:00 AM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 42 counties

Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Cherry County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Bennett County, SD, Brule County, SD, Buffalo County, SD, Custer County, SD, Fall River County, SD, Gregory County, SD, Hughes County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD, Goshen County, WY

The radar

The North Platte radar (KLNX), 98 km from the middle of the area, began a volume at 06:30 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, 6.5 hours before the alert went out and 173 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, N. Platte/Lee Bi, NE at 00:00Z on 2003-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1235 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, N. Platte/Lee Bi, NE at 00:00Z on 2003-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1235 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
847 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

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
Sep 9, 6:07 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Dawson, Franklin, Frontier, Furnas and 8 more113 min
Sep 9, 8:06 PM MDTMesoscale DiscussionSPCAdams, Antelope, Blaine, Boone, Boyd, Brown and 39 more114 min
Sep 9, 8:25 PM MDTSevere Thunderstorm WatchSPCAntelope, Boone, Boyd, Custer, Garfield, Greeley and 11 more5 hr
Sep 9, 8:44 PM MDTMesoscale DiscussionSPCBuffalo, Dawson, Franklin, Frontier, Furnas, Gosper and 6 more3 hr
Sep 10, 10:43 AM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Butler and 33 more2 hr
Sep 10, 12:55 PM MDTTornado WatchSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 35 more6 hr
Sep 10, 1:57 PM MDTMesoscale DiscussionSPCChase, Deuel, Dundy, Hayes, Hitchcock, Keith and 1 more2 hr
Sep 10, 2:57 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 33 more93 min
Sep 10, 5:53 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 33 more67 min
Sep 10, 1:07 PM MDTMesoscale DiscussionSPCBeadle, Brown, Campbell, Clark, Day, Edmunds and 8 more83 min
Sep 10, 1:35 PM MDTTornado WatchSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 22 more5 hr
Sep 10, 4:27 PM MDTMesoscale DiscussionSPCAurora, Beadle, Brown, Charles Mix, Clark, Davison and 17 more93 min

Nearby

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