Alert archive / Illinois / Mesoscale Discussions in 2005
Mesoscale Discussion 2485
The Storm Prediction Center issued this mesoscale discussion at Nov 27, 2005, 11:21 PM CST for 22 counties in Illinois; 14 counties in Missouri. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Nov 27, 2005, 11:21 PM CST (05:21 UTC)
- Expired
- Nov 28, 2005, 12:45 AM CST
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 36 counties
Bond County, IL, Calhoun County, IL, Christian County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jackson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Sangamon County, IL, Scott County, IL, Union County, IL, Washington County, IL, City of Saint Louis, MO, Franklin County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Perry County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 48 km from the middle of the area, began a volume at 05:21 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
Lincoln, IL (KILX), launched 00:00Z, 5.4 hours before the alert went out and 227 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
- 486 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 278 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 |
|---|---|---|---|---|
| Nov 27, 8:09 PM CST | Mesoscale Discussion | SPC | Adams, Calhoun, Greene, Jersey, Madison, Monroe and 2 more | 2 hr |
| Nov 27, 8:28 PM CST | Tornado Watch | SPC | Calhoun, Greene, Jersey, Madison, Monroe, Randolph and 1 more | 5 hr |
| Nov 27, 11:26 PM CST | Tornado Watch | SPC | Alexander, Bond, Christian, Clark, Clay, Clinton and 37 more | 7 hr |
| Nov 28, 12:43 AM CST | Mesoscale Discussion | SPC | Alexander | 62 min |
| Nov 28, 3:28 AM CST | Mesoscale Discussion | SPC | Alexander, Clark, Clay, Coles, Crawford, Cumberland and 29 more | 62 min |
| Nov 27, 6:19 PM CST | Tornado Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more | 8 hr |
Nearby
Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Missouri, 2005Every mesoscale discussion in 2005
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.