Alert archive / Nebraska / Mesoscale Discussions in 2003
Mesoscale Discussion 1540
The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2003, 4:46 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 13 counties in Nebraska; 6 counties in Wyoming. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2003, 4:46 PM MDT (22:46 UTC)
- Expired
- Jun 28, 2003, 6:15 PM MDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 22 counties
Logan County, CO, Phillips County, CO, Sedgwick County, CO, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Hitchcock County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sioux County, NE, Converse County, WY, Goshen County, WY, Laramie County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 101 km from the middle of the area, began a volume at 22:47 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
Denver, CO (KDNR), launched 12:00Z, 10.8 hours before the alert went out and 259 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2521 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 2:46 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 19 more | 89 min |
| Jun 28, 3:45 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 21 more | 5 hr |
| Jun 28, 5:36 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 19 more | 84 min |
| Jun 27, 9:06 PM MDT | Mesoscale Discussion | SPC | Cass, Fillmore, Gage, Jefferson, Johnson, Lancaster and 9 more | 84 min |
| Jun 28, 2:09 PM MDT | Mesoscale Discussion | SPC | Box Butte, Dawes, Morrill, Scotts Bluff, Sheridan, Sioux | 96 min |
| Jun 28, 2:35 PM MDT | Severe Thunderstorm Watch | SPC | Banner, Cheyenne, Kimball, Scotts Bluff | 6 hr |
Nearby
Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Wyoming, 2003Mesoscale Discussions in Colorado, 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.