Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 566

May 29, 20184 states

The Storm Prediction Center issued this mesoscale discussion at May 29, 2018, 2:01 PM CDT for 4 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 29, 2018, 2:01 PM CDT (19:01 UTC)
Expired
May 29, 2018, 3:30 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 27 counties

Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Atchison County, KS, Brown County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Atchison County, MO, Holt County, MO, Cass County, NE, Gage County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE

The radar

The Topeka radar (KTWX), 72 km from the middle of the area, began a volume at 19:00 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, 7.0 hours before the alert went out and 91 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 2018-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 184 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 2018-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 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
184 J/kg
Mixed-layer CIN
-264 J/kg
Mixed-layer LCL
1288 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 29, 1:22 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 10 more83 min
May 29, 1:43 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 26 more6 hr
May 29, 2:40 PM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page, Pottawattamie7 hr
May 29, 3:54 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Butler and 47 more96 min
May 29, 5:04 PM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Taylor116 min
May 28, 9:06 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Graham, Norton, Osborne and 7 more84 min
May 28, 9:08 PM CDTMesoscale DiscussionSPCClark, Comanche, Edwards, Ford, Gray, Hodgeman and 5 more67 min
May 29, 1:55 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Ford, Harper and 9 more65 min
May 29, 2:19 PM CDTTornado WatchSPCBarber, Clark, Comanche, Harper, Kingman, Sedgwick and 1 more8 hr
May 29, 3:10 PM CDTMesoscale DiscussionSPCCheyenne95 min
May 29, 5:56 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Harper, Kingman, Meade and 2 more2 hr
May 28, 7:08 PM CDTMesoscale DiscussionSPCBanner, Cheyenne, Kimball, Morrill, Scotts Bluff97 min

Nearby

Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Iowa, 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.