Alert archive / Arkansas / Mesoscale Discussions in 2009
Mesoscale Discussion 87
The Storm Prediction Center issued this mesoscale discussion at Feb 10, 2009, 4:50 PM CST for 22 counties in Arkansas; 8 counties in Kansas; 20 counties in Missouri. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Feb 10, 2009, 4:50 PM CST (22:50 UTC)
- Expired
- Feb 10, 2009, 6:15 PM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 50 counties
Baxter County, AR, Boone County, AR, Carroll County, AR, Conway County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Hot Spring County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Pope County, AR, Saline County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR, Allen County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Newton County, MO, Ozark County, MO, Polk County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Wright County, MO
The radar
The Western Arkansas radar (KSRX), 105 km from the middle of the area, began a volume at 22:54 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
Springfield, MO (KSGF), launched 12:00Z, 10.8 hours before the alert went out and 88 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
- 1772 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 188 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 |
|---|---|---|---|---|
| Feb 10, 2:42 PM CST | Tornado Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 7 hr |
| Feb 10, 3:37 PM CST | Tornado Watch | SPC | Little River, Miller, Sevier | 6 hr |
| Feb 10, 5:25 PM CST | Mesoscale Discussion | SPC | Little River, Sevier | 65 min |
| Feb 10, 1:29 PM CST | Mesoscale Discussion | SPC | Allen, Anderson, Chautauqua, Coffey, Cowley, Elk and 7 more | 2 hr |
| Feb 10, 5:32 PM CST | Tornado Watch | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 3 more | 6 hr |
Nearby
Mesoscale Discussions in Arkansas, 2009Mesoscale Discussions in Missouri, 2009Mesoscale Discussions in Kansas, 2009Every mesoscale discussion in 2009
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.