Alert archive / Missouri / Mesoscale Discussions in 2024

Mesoscale Discussion 558

April 28, 20244 states

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2024, 1:54 AM CDT for 4 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 28, 2024, 1:54 AM CDT (06:54 UTC)
Expired
Apr 28, 2024, 3:00 AM CDT
In force
66 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 154...155
All 46 counties

Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, City of Saint Louis, MO, Cole County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Warren County, MO, Webster County, MO, Wright County, MO, Ottawa County, OK

The radar

The Springfield radar (KSGF), 118 km from the middle of the area, began a volume at 06:53 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.9 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 00:00Z on 2024-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 937 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 00:00Z on 2024-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 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
937 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
939 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
208 m²/s²
0-3 km storm-relative helicity
272 m²/s²
Significant tornado parameter
1.1
Supercell composite
10.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 7:58 PM CDTMesoscale DiscussionSPCBoone, Bureau, DeKalb, DuPage, Fulton, Grundy and 20 more62 min
Apr 27, 9:15 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 15 more60 min
Apr 27, 9:41 PM CDTTornado WatchSPCAdams, Brown, Calhoun, Cass, Christian, DeWitt and 23 more6 hr
Apr 27, 8:25 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 14 more95 min
Apr 27, 11:42 PM CDTTornado WatchSPCAllen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 5 more5 hr
Apr 28, 3:38 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Labette2 hr
Apr 27, 7:11 PM CDTMesoscale DiscussionSPCAdair, Clark, Grundy, Knox, Putnam, Schuyler and 2 more64 min
Apr 28, 5:15 PM CDTTornado WatchSPCBarry, Douglas, McDonald, Newton, Ozark, Stone and 3 more6 hr
Apr 28, 6:50 PM CDTMesoscale DiscussionSPCBarry, McDonald55 min
Apr 27, 7:30 PM CDTMesoscale DiscussionSPCAdair, Caddo, Canadian, Carter, Cherokee, Cleveland and 39 more60 min
Apr 27, 7:50 PM CDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Cherokee and 42 more7 hr
Apr 27, 11:33 PM CDTMesoscale DiscussionSPCAtoka, Coal, Creek, Delaware, Hughes, Johnston and 14 more72 min
Apr 28, 12:32 AM CDTMesoscale DiscussionSPCAdair, Bryan, Choctaw, Haskell, Latimer, LeFlore and 2 more88 min
Apr 28, 1:03 AM CDTTornado WatchSPCAdair, Choctaw, Haskell, Latimer, LeFlore, Pushmataha and 1 more6 hr
Apr 28, 4:11 AM CDTMesoscale DiscussionSPCAdair, Bryan, Choctaw, Haskell, Latimer, LeFlore and 3 more64 min

Nearby

Mesoscale Discussions in Missouri, 2024Mesoscale Discussions in Illinois, 2024Mesoscale Discussions in Kansas, 2024Every mesoscale discussion in 2024

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.