Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 780

May 25, 20156 counties in Arkansas; 12 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 25, 2015, 11:48 PM CDT for 6 counties in Arkansas; 12 counties in Missouri. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: May 25, 2015, 11:48 PM CDT (04:48 UTC)
Expired: May 26, 2015, 1:15 AM CDT
In force: 87 min
Issued by: the Storm Prediction Center

Counties Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Poinsett County, AR, Randolph County, AR, Bollinger County, MO, Butler County, MO, Carter County, MO, Iron County, MO, Madison County, MO, Oregon County, MO, Reynolds County, MO, Ripley County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Wayne County, MO

The radar

The Springfield radar (KSGF), 195 km from the middle of the area, began a volume at 04:52 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 00:00Z, 4.8 hours before the alert went out and 225 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: 849 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1323 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 8:52 PM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Boone, Carroll, Clay, Cleburne and 35 more	83 min
May 25, 10:03 PM CDT	Tornado Watch	SPC	Clay, Craighead, Cross, Greene, Lawrence, Poinsett and 2 more	4 hr
May 25, 7:47 PM CDT	Tornado Watch	SPC	Barry, Barton, Cedar, Christian, Dade, Dallas and 20 more	5 hr
May 25, 8:18 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Daviess, DeKalb, Gentry and 5 more	87 min

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Arkansas, 2015 Every mesoscale discussion in 2015

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.