Alert archive / Missouri / Mesoscale Discussions in 2019

Mesoscale Discussion 714

May 20, 201910 counties in Arkansas; 17 counties in Missouri; 16 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 20, 2019, 10:30 PM CDT for 10 counties in Arkansas; 17 counties in Missouri; 16 counties in Oklahoma. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: May 20, 2019, 10:30 PM CDT (03:30 UTC)
Expired: May 20, 2019, 11:30 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

All 43 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Sebastian County, AR, Washington County, AR, Barry 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, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Taney County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Springfield radar (KSGF), 99 km from the middle of the area, began a volume at 03:35 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.

Tornado Watch 204May 21, 12:20 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.5 hours before the alert went out and 48 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 38 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 462 m²/s²
0-3 km storm-relative helicity: 819 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 11:06 PM CDT	Mesoscale Discussion	SPC	Benton	24 min
May 21, 12:18 AM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 6 more	5 hr
May 21, 12:55 AM CDT	Mesoscale Discussion	SPC	Clay, Fulton, Randolph	95 min
May 21, 5:09 AM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	9 hr
May 21, 7:26 AM CDT	Mesoscale Discussion	SPC	Benton, Crawford, Little River, Polk, Scott, Sebastian and 2 more	94 min
May 21, 9:57 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Clark, Cleburne, Conway and 26 more	93 min
May 21, 11:32 AM CDT	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 19 more	7 hr
May 21, 1:51 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Marion, Newton, Pope, Searcy	84 min
May 21, 4:43 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Cross, Greene, Jackson, Lawrence and 3 more	62 min
May 20, 8:20 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Camden, Dent, Hickory, Howell, Laclede and 10 more	8 hr
May 21, 3:10 PM CDT	Tornado Watch	SPC	Audrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 32 more	8 hr
May 21, 5:43 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Franklin and 20 more	62 min
May 21, 6:12 PM CDT	Mesoscale Discussion	SPC	Saint Charles, Saint Louis, City of Saint Louis	33 min
May 21, 6:53 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Holt	3 hr
May 20, 7:38 PM CDT	Mesoscale Discussion	SPC	Canadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more	97 min
May 20, 8:22 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 40 more	53 min
May 20, 10:07 PM CDT	Tornado Watch	SPC	Carter, Cleveland, Coal, Comanche, Cotton, Creek and 18 more	9 hr
May 21, 2:24 AM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Coal, Cotton, Garvin, Grady and 11 more	96 min
May 21, 4:56 AM CDT	Mesoscale Discussion	SPC	Creek, Hughes, Lincoln, McIntosh, Okfuskee, Okmulgee and 2 more	64 min

Nearby

Mesoscale Discussions in Missouri, 2019 Mesoscale Discussions in Oklahoma, 2019 Mesoscale Discussions in Arkansas, 2019 Every 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.