Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 1766

July 22, 20044 counties in Illinois; 12 counties in Kansas; 35 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2004, 6:08 PM CDT for 4 counties in Illinois; 12 counties in Kansas; 35 counties in Missouri. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 22, 2004, 6:08 PM CDT (23:08 UTC)
Expired
Jul 22, 2004, 7:45 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 51 counties

Jersey County, IL, Madison County, IL, Monroe County, IL, Saint Clair County, IL, Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Douglas County, KS, Franklin County, KS, Johnson County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Osage County, KS, Woodson County, KS, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cass County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Jefferson County, MO, Johnson County, MO, Lafayette County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO, Washington County, MO

The radar

The Pleasant Hill radar (KEAX), 77 km from the middle of the area, began a volume at 23:12 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 nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.1 hours before the alert went out and 177 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, Springfield, MO at 12:00Z on 2004-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 671 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, Springfield, MO at 12:00Z on 2004-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -62 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
671 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1321 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-62 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jul 22, 11:59 AM CDTMesoscale DiscussionSPCChampaign, DeWitt, Ford, Grundy, Iroquois, Kankakee and 10 more2 hr
Jul 22, 12:20 PM CDTSevere Thunderstorm WatchSPCBureau, Champaign, Coles, Cook, DeKalb, DeWitt and 24 more6 hr
Jul 22, 1:52 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Crawford, Cumberland, Douglas and 10 more83 min
Jul 22, 3:05 PM CDTSevere Thunderstorm WatchSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 20 more6 hr
Jul 22, 6:42 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 9 more93 min
Jul 22, 2:35 PM CDTTornado WatchSPCCheyenne, Greeley, Hamilton, Sherman, Wallace4 hr
Jul 22, 3:48 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Hamilton, Wallace87 min
Jul 22, 5:05 PM CDTMesoscale DiscussionSPCBarton, Clark, Edwards, Ellsworth, Ford, Grant and 18 more85 min
Jul 22, 6:34 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Hamilton, Sherman, Wallace26 min

Nearby

Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Kansas, 2004Mesoscale Discussions in Illinois, 2004Every mesoscale discussion in 2004

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.