Alert archive / Nebraska / Mesoscale Discussions in 2004
Mesoscale Discussion 1149
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2004, 10:58 PM MDT for Phillips County, Sedgwick County, Yuma County, Colorado; 28 counties in Nebraska; Gregory County, Tripp County, South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2004, 10:58 PM MDT (04:58 UTC)
- Expired
- Jun 9, 2004, 1:00 AM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Arthur County, NE, Blaine County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Rock County, NE, Thomas County, NE, Valley County, NE, Gregory County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 45 km from the middle of the area, began a volume at 04:58 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, 5.0 hours before the alert went out and 57 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.
- Mixed-layer CAPE
- 711 J/kg
- Mixed-layer CIN
- -427 J/kg
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 329 m²/s²
- 0-3 km storm-relative helicity
- 439 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.8
The text
As transmitted, in the capitals the NWS used until 2016.
525 ACUS11 KWNS 090458 SWOMCD SPC MCD 090458 NEZ000-SDZ000-KSZ000-COZ000-090700- MESOSCALE DISCUSSION 1149 NWS STORM PREDICTION CENTER NORMAN OK 1158 PM CDT TUE JUN 08 2004 AREAS AFFECTED...SWRN NEB CONCERNING...SEVERE THUNDERSTORM WATCH 412... VALID 090458Z - 090700Z CONTINUE WW. INTENSE CONVECTION PERSISTS IN SMALL CLUSTER NEAR MCCOOK...WHERE ISENTROPIC ASCENT HAS STEEPENED ALONG LOW-LEVEL JET AXIS...ABOVE COLD SURFACE RIDGE WHICH HAS NOSED SOUTHWARD INTO NORTHWEST KANSAS. ACTIVITY MAY BE ENHANCED BY FORCING ASSOCIATED WITH MID-LEVEL TROUGH/VORTICITY CENTER AND ASSOCIATED AREA OF FOCUSED UPPER DIVERGENCE. UNTIL THIS FORCING WEAKENS...SLOWLY DRIFTS NORTHEASTWARD OVERNIGHT...RISK OF STRONG UPDRAFTS WITH MARGINALLY SEVERE HAIL WILL CONTINUE IN MODERATELY UNSTABLE...WEAKLY SHEARED ENVIRONMENT. ..KERR.. 06/09/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FSD...GID...LBF...UNR...GLD...BOU...CYS... 40090063 39750191 40070308 41430301 42090189 42790122 43460024 43469929 42699878 41779853
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:20 PM MDT | Mesoscale Discussion | SPC | Phillips, Sedgwick, Yuma | 115 min |
| Jun 8, 7:55 PM MDT | Severe Thunderstorm Watch | SPC | Kit Carson, Yuma | 5 hr |
| Jun 9, 12:42 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 14 more | 93 min |
| Jun 9, 1:40 PM MDT | Tornado Watch | SPC | Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 21 more | 6 hr |
| Jun 9, 4:42 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 20 more | 93 min |
| Jun 9, 12:03 AM MDT | Mesoscale Discussion | SPC | Chase, Dawson, Dundy, Frontier, Gosper, Hayes and 3 more | 27 min |
Nearby
Mesoscale Discussions in Nebraska, 2004Mesoscale Discussions in Colorado, 2004Mesoscale Discussions in South Dakota, 2004Every mesoscale discussion in 2004
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.