Alert archive / Kansas / Mesoscale Discussions in 2008

Mesoscale Discussion 1899

July 24, 200822 counties in Kansas; 7 counties in Missouri; 4 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2008, 3:43 PM CDT for 22 counties in Kansas; 7 counties in Missouri; 4 counties in Nebraska. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 24, 2008, 3:43 PM CDT (20:43 UTC)
Expired: Jul 24, 2008, 5:15 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 33 counties

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, Marshall County, KS, Miami County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Bates County, MO, Buchanan County, MO, Cass County, MO, Clay County, MO, Jackson County, MO, Johnson County, MO, Platte County, MO, Gage County, NE, Jefferson County, NE, Pawnee County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 47 km from the middle of the area, began a volume at 20:45 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.

Tornado Watch 747Jul 24, 5:00 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.7 hours before the alert went out and 46 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 831 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 1327 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

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.

Issued	Product	Office	Counties	Lasted
Jul 24, 5:00 PM CDT	Tornado Watch	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 17 more	6 hr
Jul 23, 8:09 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Boone, Brown, Buffalo and 40 more	96 min
Jul 23, 10:45 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more	7 hr
Jul 24, 1:46 AM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more	89 min
Jul 24, 10:47 AM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Custer, Logan, Loup and 1 more	118 min
Jul 24, 3:04 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Boyd, Brown, Cherry, Custer, Dawes and 8 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 2008 Mesoscale Discussions in Missouri, 2008 Mesoscale Discussions in Nebraska, 2008 Every mesoscale discussion in 2008

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.