Alert archive / Arkansas / Mesoscale Discussions in 2019
Mesoscale Discussion 672
The Storm Prediction Center issued this mesoscale discussion at May 18, 2019, 3:32 PM CDT for 30 counties in Arkansas; 29 counties in Missouri. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2019, 3:32 PM CDT (20:32 UTC)
- Expired
- May 18, 2019, 5:00 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 59 counties
Baxter County, AR, Boone County, AR, Clark County, AR, Cleburne County, AR, Conway County, AR, Dallas County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Lonoke County, AR, Marion County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Pope County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Callaway County, MO, Camden County, MO, Carter County, MO, Christian County, MO, Cole County, MO, Crawford County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Laclede County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Phelps County, MO, Pulaski County, MO, Ripley County, MO, Shannon County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO
The radar
The Springfield radar (KSGF), 120 km from the middle of the area, began a volume at 20:35 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, 8.5 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
- 717 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 345 m²/s²
- 0-3 km storm-relative helicity
- 385 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 18, 9:10 AM CDT | Tornado Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 8 hr |
| May 18, 12:11 PM CDT | Mesoscale Discussion | SPC | Howard, Little River, Polk, Scott, Sevier | 64 min |
| May 18, 12:47 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more | 88 min |
| May 18, 12:48 PM CDT | Tornado Watch | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 42 more | 7 hr |
| May 18, 6:19 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Chicot, Cleveland, Craighead and 21 more | 116 min |
| May 18, 6:42 PM CDT | Severe Thunderstorm Watch | SPC | Crittenden, Cross, Lee, Phillips, St. Francis | 4 hr |
| May 18, 9:38 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Cedar, Dade, Greene, Jasper and 6 more | 2 hr |
| May 18, 10:07 AM CDT | Tornado Watch | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 22 more | 7 hr |
| May 18, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Bollinger, Boone, Butler, Callaway, Carter and 35 more | 4 hr |
| May 18, 6:59 PM CDT | Mesoscale Discussion | SPC | Clark, Knox, Lewis, Marion, Scotland | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2019Mesoscale Discussions in Missouri, 2019Every mesoscale discussion in 2019
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.