Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 1493

July 4, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2004, 6:08 AM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 4, 2004, 6:08 AM CDT (11:08 UTC)
Expired
Jul 4, 2004, 8:15 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 47 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Madison County, AR, Washington County, AR, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Barry County, MO, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 11:10 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

Springfield, MO (KSGF), launched 00:00Z, 11.1 hours before the alert went out and 86 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 00:00Z on 2004-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 908 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 00:00Z on 2004-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
908 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1132 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.4
Supercell composite
4.9

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 4, 5:05 AM CDTSevere Thunderstorm WatchSPCBenton, Boone, Carroll, Crawford, Madison, Washington5 hr
Jul 4, 6:09 AM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Madison, Washington2 hr
Jul 4, 9:00 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 28 more5 hr
Jul 4, 10:38 AM CDTMesoscale DiscussionSPCArkansas, Clay, Craighead, Crittenden, Cross, Greene and 11 more2 hr
Jul 4, 11:35 AM CDTSevere Thunderstorm WatchSPCCrittenden, Mississippi4 hr
Jul 4, 1:25 PM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Johnson, Logan, Madison and 5 more2 hr
Jul 3, 9:41 PM CDTMesoscale DiscussionSPCClay, Cloud, Ellis, Gove, Graham, Jewell and 14 more64 min
Jul 3, 10:10 PM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Chase, Clay, Cloud, Coffey and 20 more6 hr
Jul 3, 10:25 PM CDTSevere Thunderstorm WatchSPCBarton, Dickinson, Ellis, Ellsworth, Geary, Gove and 17 more6 hr
Jul 4, 1:45 AM CDTMesoscale DiscussionSPCAtchison, Barton, Brown, Chase, Clay, Coffey and 31 more90 min
Jul 4, 2:55 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Butler, Chase and 40 more5 hr
Jul 4, 2:15 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Gove, Grant, Greeley, Hamilton and 12 more8 hr
Jul 4, 3:21 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ford and 10 more84 min
Jul 4, 3:40 PM CDTSevere Thunderstorm WatchSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 16 more6 hr
Jul 4, 5:24 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Grant, Greeley and 16 more96 min

Nearby

Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in Arkansas, 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.