Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 417

April 27, 2014Page County, Ringgold County, Taylor County, Iowa; 8 counties in Kansas; 32 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2014, 10:37 AM CDT for Page County, Ringgold County, Taylor County, Iowa; 8 counties in Kansas; 32 counties in Missouri. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Apr 27, 2014, 10:37 AM CDT (15:37 UTC)
Expired
Apr 27, 2014, 12:30 PM CDT
In force
113 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 43 counties

Page County, IA, Ringgold County, IA, Taylor County, IA, Bourbon County, KS, Crawford County, KS, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Barton County, MO, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Dade County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Holt County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Lafayette County, MO, Lawrence County, MO, Livingston County, MO, Newton County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, St. Clair County, MO, Vernon County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 24 km from the middle of the area, began a volume at 15:37 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.

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 3.6 hours before the alert went out and 103 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, Topeka, KS at 12:00Z on 2014-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1488 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, Topeka, KS at 12:00Z on 2014-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.19395878Sfc1 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
1488 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.9
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.

IssuedProductOfficeCountiesLasted
Apr 27, 11:23 AM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 14 more8 hr
Apr 27, 1:59 PM CDTMesoscale DiscussionSPCAdair, Appanoose, Audubon, Boone, Calhoun, Carroll and 28 more61 min
Apr 27, 2:13 PM CDTSevere Thunderstorm WatchSPCCedar, Davis, Des Moines, Henry, Iowa, Jefferson and 11 more7 hr
Apr 27, 4:26 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Cedar, Clayton and 19 more64 min
Apr 27, 5:09 AM CDTMesoscale DiscussionSPCAnderson, Atchison, Barber, Barton, Butler, Chase and 46 more96 min
Apr 27, 6:09 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Brown, Butler, Chase, Chautauqua and 41 more6 hr
Apr 27, 7:55 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Butler and 40 more95 min
Apr 27, 11:54 AM CDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Jewell, Mitchell, Ottawa and 3 more96 min
Apr 27, 12:16 PM CDTTornado WatchSPCJewell, Mitchell, Smith7 hr
Apr 27, 4:57 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Johnson, Linn, Miami and 1 more63 min
Apr 27, 6:10 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Johnson, Linn, Miami and 1 more95 min
Apr 27, 6:26 PM CDTTornado WatchSPCJohnson, Leavenworth, Miami, Wyandotte8 hr

Nearby

Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Kansas, 2014Mesoscale Discussions in Iowa, 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.