Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 2359

September 9, 200345 counties in Nebraska; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2003, 9:06 PM CDT for 45 counties in Nebraska; 4 counties in South Dakota. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
Sep 9, 2003, 9:06 PM CDT (02:06 UTC)
Expired
Sep 9, 2003, 11:00 PM CDT
In force
114 min
Issued by
the Storm Prediction Center
All 49 counties

Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Cherry County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keya Paha County, NE, Knox County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE, Charles Mix County, SD, Gregory County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 132 km from the middle of the area, began a volume at 02:07 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.1 hours before the alert went out and 122 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, 7:07 PM CDTMesoscale DiscussionSPCAdams, Buffalo, Dawson, Franklin, Frontier, Furnas and 8 more113 min
Sep 9, 9:25 PM CDTSevere Thunderstorm WatchSPCAntelope, Boone, Boyd, Custer, Garfield, Greeley and 11 more5 hr
Sep 9, 9:44 PM CDTMesoscale DiscussionSPCBuffalo, Dawson, Franklin, Frontier, Furnas, Gosper and 6 more3 hr
Sep 10, 1:31 AM CDTMesoscale DiscussionSPCArthur, Banner, Blaine, Box Butte, Brown, Cherry and 18 more2 hr
Sep 10, 11:43 AM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Butler and 33 more2 hr
Sep 10, 1:55 PM CDTTornado WatchSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 35 more6 hr
Sep 10, 2:57 PM CDTMesoscale DiscussionSPCChase, Deuel, Dundy, Hayes, Hitchcock, Keith and 1 more2 hr
Sep 10, 3:57 PM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 33 more93 min
Sep 10, 6:53 PM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Boyd, Buffalo, Cedar and 33 more67 min
Sep 10, 2:07 PM CDTMesoscale DiscussionSPCBeadle, Brown, Campbell, Clark, Day, Edmunds and 8 more83 min
Sep 10, 2:35 PM CDTTornado WatchSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 22 more5 hr
Sep 10, 5:27 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brown, Charles Mix, Clark, Davison and 17 more93 min

Nearby

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