Alert archive / Missouri / Mesoscale Discussions in 2018

Mesoscale Discussion 325

May 2, 201817 counties in Iowa; 15 counties in Kansas; 39 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 2, 2018, 8:00 PM CDT for 17 counties in Iowa; 15 counties in Kansas; 39 counties in Missouri. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 2, 2018, 8:00 PM CDT (01:00 UTC)
Expired
May 2, 2018, 9:30 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 71 counties

Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Anderson County, KS, Atchison County, KS, Brown County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Osage County, KS, Shawnee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Bates County, MO, Benton County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Pettis County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 82 km from the middle of the area, began a volume at 01:05 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

Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 286 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 2018-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1170 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 2018-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
1170 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
1041 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.6

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
May 2, 7:21 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more84 min
May 2, 10:01 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 3 more89 min
May 3, 2:36 PM CDTMesoscale DiscussionSPCAdams, Clarke, Decatur, Fremont, Montgomery, Page and 3 more114 min
May 3, 2:57 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 24 more6 hr
May 3, 5:58 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Dallas and 16 more92 min
May 2, 7:14 PM CDTMesoscale DiscussionSPCAllen, Chautauqua, Cherokee, Crawford, Elk, Labette and 4 more2 hr
May 2, 11:09 PM CDTSevere Thunderstorm WatchSPCCherokee, Crawford7 hr
May 2, 10:20 PM CDTMesoscale DiscussionSPCAudrain, Barry, Barton, Benton, Boone, Callaway and 54 more115 min
May 2, 11:09 PM CDTMesoscale DiscussionSPCMcDonald96 min
May 3, 2:32 AM CDTMesoscale DiscussionSPCCamden, Carter, Christian, Cole, Crawford, Dallas and 33 more88 min

Nearby

Mesoscale Discussions in Missouri, 2018Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in Kansas, 2018Every mesoscale discussion in 2018

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.