Alert archive / Colorado / Mesoscale Discussions in 2004
Mesoscale Discussion 779
The Storm Prediction Center issued this mesoscale discussion at May 20, 2004, 4:02 PM MDT for 15 counties in Colorado; Banner County, Kimball County, Scotts Bluff County, Nebraska; Goshen County, Laramie County, Platte County, Wyoming. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2004, 4:02 PM MDT (22:02 UTC)
- Expired
- May 20, 2004, 6:00 PM MDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 21 counties
Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Kimball County, NE, Scotts Bluff County, NE, Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Denver radar (KFTG), 71 km from the middle of the area, began a volume at 22:06 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, 10.0 hours before the alert went out and 124 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
- 1607 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| May 20, 2:19 PM MDT | Mesoscale Discussion | SPC | Baca, Las Animas, Prowers | 116 min |
| May 20, 4:34 PM MDT | Mesoscale Discussion | SPC | Campbell, Converse, Crook, Fremont, Hot Springs, Johnson and 4 more | 116 min |
Nearby
Mesoscale Discussions in Colorado, 2004Mesoscale Discussions in Nebraska, 2004Mesoscale Discussions in Wyoming, 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.