Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 282
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2017, 9:30 PM CST for 4 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2017, 9:30 PM CST (03:30 UTC)
- Expired
- Mar 9, 2017, 11:00 PM CST
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 60 counties
Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Mississippi County, AR, Newton County, AR, Poinsett County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Adair County, OK, Cherokee County, OK, Haskell County, OK, Hughes County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Sequoyah County, OK, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Little Rock radar (KLZK), 98 km from the middle of the area, began a volume at 03:30 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
Little Rock, AR (KBYH), launched 00:00Z, 3.5 hours before the alert went out and 244 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
- 445 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 583 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 312 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 6.1
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 6:42 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 23 more | 5 hr |
| Mar 9, 7:58 PM CST | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, Dickson and 23 more | 92 min |
| Mar 9, 8:38 PM CST | Severe Thunderstorm Watch | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, DeKalb and 24 more | 4 hr |
| Mar 9, 10:42 PM CST | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Chester, Coffee, Davidson and 32 more | 63 min |
| Mar 9, 11:18 PM CST | Severe Thunderstorm Watch | SPC | Franklin, Lincoln, Marion, Moore | 4 hr |
| Mar 10, 12:50 AM CST | Mesoscale Discussion | SPC | Bledsoe, Bradley, Hamilton, McMinn, Marion, Meigs and 4 more | 85 min |
Nearby
Mesoscale Discussions in Arkansas, 2017Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Oklahoma, 2017Every mesoscale discussion in 2017
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.