Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 587

May 10, 20154 states

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 11:52 AM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 10, 2015, 11:52 AM CDT (16:52 UTC)
Expired
May 10, 2015, 2:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 29 counties

Adams County, IA, Decatur County, IA, Fremont County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Doniphan County, KS, Andrew County, MO, Atchison County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Saline County, MO, Sullivan County, MO, Worth County, MO, Nemaha County, NE, Otoe County, NE

The radar

The Pleasant Hill radar (KEAX), 162 km from the middle of the area, began a volume at 16:53 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, 4.9 hours before the alert went out and 191 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 2015-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 493 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 2015-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.1939587897Sfc1 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
493 J/kg
Mixed-layer CIN
-157 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.7

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 10, 10:24 AM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 16 more3 hr
May 10, 10:46 AM CDTTornado WatchSPCAdair, Audubon, Buena Vista, Calhoun, Carroll, Cass and 21 more8 hr
May 10, 1:47 PM CDTSevere Thunderstorm WatchSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 2 more8 hr
May 10, 2:43 PM CDTMesoscale DiscussionSPCAdams, Audubon, Buena Vista, Cass, Cherokee, Crawford and 11 more92 min
May 10, 3:13 PM CDTMesoscale DiscussionSPCPage92 min
May 10, 5:17 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Iowa, Jackson and 9 more88 min
May 9, 8:10 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Decatur, Edwards and 14 more95 min
May 10, 12:33 PM CDTMesoscale DiscussionSPCCowley2 hr
May 10, 11:00 AM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Boone, Camden, Cedar and 32 more3 hr
May 10, 1:22 PM CDTTornado WatchSPCAdair, Audrain, Benton, Boone, Butler, Callaway and 54 more4 hr
May 10, 3:52 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Franklin and 24 more68 min
May 10, 4:02 PM CDTSevere Thunderstorm WatchSPCBollinger, Cape Girardeau, Jefferson, Lincoln, Mississippi, New Madrid and 8 more4 hr
May 10, 6:30 PM CDTMesoscale DiscussionSPCCape Girardeau, Mississippi, New Madrid, Scott, Stoddard90 min

Nearby

Mesoscale Discussions in Missouri, 2015Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Nebraska, 2015Every 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.