Alert archive / Missouri / Mesoscale Discussions in 2019

Mesoscale Discussion 830

May 27, 201923 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 27, 2019, 9:23 AM CDT for 23 counties in Missouri. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: May 27, 2019, 9:23 AM CDT (14:23 UTC)
Expired: May 27, 2019, 11:00 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 23 counties

Barton County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Johnson County, MO, Laclede County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Pettis County, MO, Polk County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 99 km from the middle of the area, began a volume at 14:26 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, 2.4 hours before the alert went out and 148 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: 937 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 884 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 241 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.7

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 27, 1:54 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Barton, Bates, Buchanan, Cass and 14 more	111 min
May 27, 2:41 AM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Bates, Buchanan, Cass, Clay and 8 more	4 hr

Nearby

Mesoscale Discussions in Missouri, 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.