Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 584

May 12, 2014Benton County, Carroll County, Arkansas; 43 counties in Missouri; Delaware County, Ottawa County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 12, 2014, 2:12 PM CDT for Benton County, Carroll County, Arkansas; 43 counties in Missouri; Delaware County, Ottawa County, Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2014, 2:12 PM CDT (19:12 UTC)
Expired
May 12, 2014, 4:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 47 counties

Benton County, AR, Carroll County, AR, Audrain County, MO, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Cedar County, MO, Chariton County, MO, Christian County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Polk County, MO, Pulaski County, MO, Randolph County, MO, Saline County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Wright County, MO, Delaware County, OK, Ottawa County, OK

The radar

The Pleasant Hill radar (KEAX), 110 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 170 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2014-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1515 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2014-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 299 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1515 J/kg
Mixed-layer CIN
-121 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
299 m²/s²
0-3 km storm-relative helicity
433 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
May 12, 11:52 AM CDTMesoscale DiscussionSPCBenton83 min
May 11, 9:56 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Holt, Nodaway, Worth6 hr
May 12, 2:38 AM CDTMesoscale DiscussionSPCBates, Buchanan, Carroll, Cass, Clay, Clinton and 8 more2 hr
May 12, 3:15 AM CDTSevere Thunderstorm WatchSPCCaldwell, Carroll, Cass, Chariton, Clay, Clinton and 13 more3 hr
May 12, 11:54 AM CDTMesoscale DiscussionSPCAdair, Caldwell, Carroll, Chariton, Clark, Daviess and 18 more2 hr
May 12, 1:00 PM CDTSevere Thunderstorm WatchSPCAdair, Clark, Knox, Lewis, Linn, Macon and 6 more7 hr
May 12, 3:21 PM CDTMesoscale DiscussionSPCAdair, Clark, Knox, Lewis, Linn, Macon and 6 more54 min
May 11, 7:51 PM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Kiowa, Roger Mills and 2 more54 min
May 11, 8:18 PM CDTSevere Thunderstorm WatchSPCBeckham, Blaine, Custer, Dewey, Greer, Harmon and 5 more6 hr
May 11, 8:30 PM CDTMesoscale DiscussionSPCAlfalfa, Harper, Woods, Woodward90 min
May 11, 11:41 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Dewey, Ellis, Major, Roger Mills and 2 more64 min

Nearby

Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Oklahoma, 2014Every mesoscale discussion in 2014

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.