Alert archive / Iowa / Mesoscale Discussions in 2020

Mesoscale Discussion 704

May 24, 20204 states

The Storm Prediction Center issued this mesoscale discussion at May 24, 2020, 1:13 PM CDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
May 24, 2020, 1:13 PM CDT (18:13 UTC)
Expired
May 24, 2020, 2:45 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
80%
All 84 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Anderson County, KS, Atchison County, KS, Brown County, KS, Clay County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Sullivan County, MO, Worth County, MO, Cass County, NE, Gage County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 126 km from the middle of the area, began a volume at 18:13 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 (KTOP), launched 12:00Z, 6.2 hours before the alert went out and 112 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 2020-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1980 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 2020-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
1980 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 23, 11:58 PM CDTSevere Thunderstorm WatchSPCCherokee, Harrison, Ida, Lyon, Mills, Monona and 6 more6 hr
May 24, 4:13 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 56 more62 min
May 24, 5:30 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more4 hr
May 24, 1:40 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 32 more6 hr
May 24, 3:25 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 19 more95 min
May 23, 8:02 PM CDTMesoscale DiscussionSPCBarton, Clark, Edwards, Ellis, Finney, Ford and 9 more2 hr
May 24, 2:15 PM CDTMesoscale DiscussionSPCEdwards, Finney, Ford, Grant, Gray, Haskell and 9 more2 hr
May 24, 2:28 PM CDTMesoscale DiscussionSPCGreeley, Hamilton, Stanton2 hr
May 24, 3:07 PM CDTMesoscale DiscussionSPCSeward83 min
May 24, 5:14 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 32 more91 min
May 24, 5:36 PM CDTSevere Thunderstorm WatchSPCBarton, Clark, Comanche, Edwards, Ellis, Ellsworth and 29 more6 hr
May 24, 2:58 PM CDTMesoscale DiscussionSPCBarry, Benton, Camden, Cedar, Christian, Cole and 21 more2 hr
May 23, 7:53 PM CDTMesoscale DiscussionSPCBlaine, Boyd, Brown, Cherry, Custer, Dawson and 13 more97 min
May 23, 8:29 PM CDTSevere Thunderstorm WatchSPCArthur, Blaine, Brown, Chase, Cherry, Custer and 16 more5 hr
May 23, 11:08 PM CDTMesoscale DiscussionSPCBlaine, Brown, Custer, Dawson, Lincoln, Logan and 4 more2 hr
May 24, 1:20 AM CDTMesoscale DiscussionSPCBoone, Greeley, Nance, Valley, Wheeler55 min

Nearby

Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Kansas, 2020Every mesoscale discussion in 2020

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.