Alert archive / Arkansas / Mesoscale Discussions in 2014
Mesoscale Discussion 1723
The Storm Prediction Center issued this mesoscale discussion at Sep 17, 2014, 1:20 PM CDT for 19 counties in Arkansas; 8 counties in Missouri; 5 counties in Oklahoma. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Sep 17, 2014, 1:20 PM CDT (18:20 UTC)
- Expired
- Sep 17, 2014, 3:15 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 32 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Conway County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Barry County, MO, Christian County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Delaware County, OK, Haskell County, OK, LeFlore County, OK, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 108 km from the middle of the area, began a volume at 18:22 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
Springfield, MO (KSGF), launched 12:00Z, 6.3 hours before the alert went out and 82 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
- 1260 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 229 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 |
|---|---|---|---|---|
| Sep 17, 3:39 PM CDT | Mesoscale Discussion | SPC | Benton, Conway, Crawford, Franklin, Garland, Johnson and 10 more | 66 min |
| Sep 17, 2:50 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cass and 19 more | 85 min |
Nearby
Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Oklahoma, 2014Every mesoscale discussion in 2014
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.