Alert archive / Kansas / Mesoscale Discussions in 2007

Mesoscale Discussion 873

May 23, 20074 states

The Storm Prediction Center issued this mesoscale discussion at May 23, 2007, 7:10 PM CDT for 4 states. It was in force for 35 min.

The area

The outline as issued.

The facts

Issued
May 23, 2007, 7:10 PM CDT (00:10 UTC)
Expired
May 23, 2007, 7:45 PM CDT
In force
35 min
Issued by
the Storm Prediction Center
All 69 counties

Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Taylor County, IA, Atchison County, KS, Barton County, KS, Brown County, KS, Butler County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Reno County, KS, Rice County, KS, Riley County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Stafford County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Nodaway County, MO, Platte County, MO, Worth County, MO, Cass County, NE, Gage County, NE, Jefferson 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), 45 km from the middle of the area, began a volume at 00:12 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 00:00Z, 0.2 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 00:00Z on 2007-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1254 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 00:00Z on 2007-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
1254 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1305 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.4

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, 7:42 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Black Hawk, Bremer, Butler and 31 more2 hr
May 24, 1:51 AM CDTMesoscale DiscussionSPCDecatur, Page, Ringgold, Taylor54 min
May 23, 7:48 PM CDTSevere Thunderstorm WatchSPCBarton, Butler, Chase, Clay, Cloud, Dickinson and 22 more7 hr
May 23, 10:12 PM CDTMesoscale DiscussionSPCClark, Comanche, Edwards, Finney, Ford, Grant and 12 more63 min
May 23, 10:48 PM CDTTornado WatchSPCBarber, Clark, Comanche, Kiowa, Meade, Pratt and 1 more4 hr
May 23, 11:29 PM CDTMesoscale DiscussionSPCBarton, Butler, Chase, Clay, Cloud, Dickinson and 25 more91 min
May 24, 2:06 AM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Kiowa, Pratt and 1 more54 min
May 24, 2:41 AM CDTSevere Thunderstorm WatchSPCAnderson, Brown, Butler, Chase, Coffey, Cowley and 25 more3 hr
May 24, 5:19 AM CDTMesoscale DiscussionSPCAtchison, Brown, Butler, Chase, Coffey, Cowley and 16 more56 min

Nearby

Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Nebraska, 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.