Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 1279

June 28, 201318 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2013, 1:04 AM CDT for 18 counties in Missouri. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2013, 1:04 AM CDT (06:04 UTC)
Expired: Jun 28, 2013, 2:00 AM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Bollinger County, MO, Butler County, MO, Carter County, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Madison County, MO, Osage County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO

The radar

The St Louis radar (KLSX), 113 km from the middle of the area, began a volume at 06:04 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.

Severe Thunderstorm Watch 383Jun 28, 2:15 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.1 hours before the alert went out and 235 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: 3692 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1460 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.4

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
Jun 27, 8:59 PM CDT	Mesoscale Discussion	SPC	Bates, Vernon	91 min
Jun 27, 9:48 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Jasper, Newton, Vernon	2 hr
Jun 27, 11:51 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Benton, Camden, Cedar and 24 more	84 min
Jun 28, 12:09 AM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Benton, Camden, Cedar, Christian and 28 more	5 hr
Jun 28, 2:13 AM CDT	Severe Thunderstorm Watch	SPC	Bollinger, Butler, Carter, Crawford, Dunklin, Iron and 7 more	5 hr
Jun 28, 4:17 AM CDT	Mesoscale Discussion	SPC	Butler, Dunklin, Pemiscot, Ripley	58 min

Nearby

Mesoscale Discussions in Missouri, 2013 Every mesoscale discussion in 2013

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.