Alert archive / Kansas / Mesoscale Discussions in 2007

Mesoscale Discussion 868

May 23, 20074 states

The Storm Prediction Center issued this mesoscale discussion at May 23, 2007, 3:11 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 23, 2007, 3:11 PM CDT (20:11 UTC)
Expired
May 23, 2007, 4:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 24 counties

Fremont County, IA, Page County, IA, Barber County, KS, Brown County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Harvey County, KS, Kingman County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Riley County, KS, Saline County, KS, Atchison County, MO, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 80 km from the middle of the area, began a volume at 20:14 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, 8.2 hours before the alert went out and 131 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 2007-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 586 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 2007-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
586 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

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 23, 12:30 PM CDTMesoscale DiscussionSPCAdair, Allamakee, Audubon, Benton, Black Hawk, Boone and 45 more3 hr
May 23, 1:27 PM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page7 hr
May 23, 2:58 PM CDTSevere Thunderstorm WatchSPCChickasaw, Floyd, Howard, Mitchell6 hr
May 23, 3:11 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 43 more6 hr
May 23, 5:19 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page, Pottawattamie86 min
May 23, 5:24 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Butler, Carroll and 24 more2 hr
May 22, 9:41 PM CDTMesoscale DiscussionSPCEllis, Finney, Jewell, Ness, Osborne, Pawnee and 6 more94 min
May 22, 10:49 PM CDTSevere Thunderstorm WatchSPCBarton, Cloud, Ellis, Ellsworth, Jewell, Lincoln and 12 more5 hr
May 23, 2:27 AM CDTMesoscale DiscussionSPCCloud, Ellsworth, Lincoln, Ottawa, Republic93 min
May 23, 12:22 PM CDTMesoscale DiscussionSPCBarber, Clay, Cloud, Comanche, Dickinson, Ellsworth and 13 more83 min
May 23, 2:20 PM CDTMesoscale DiscussionSPCClark, Finney, Ford, Grant, Gray, Greeley and 12 more55 min
May 23, 3:31 PM CDTTornado Watch PDSSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 19 more7 hr
May 23, 4:33 PM CDTMesoscale DiscussionSPCHamilton, Kearny, Morton, Stanton2 hr
May 23, 6:06 PM CDTMesoscale DiscussionSPCClark, Comanche, Edwards, Finney, Ford, Grant and 12 more84 min
May 22, 7:50 PM CDTMesoscale DiscussionSPCAntelope, Boyd, Cedar, Garfield, Holt, Knox and 2 more85 min

Nearby

Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Iowa, 2007Every mesoscale discussion in 2007

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.