Alert archive / Missouri / Mesoscale Discussions in 2007

Mesoscale Discussion 2096

October 17, 20075 counties in Illinois; 86 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Oct 17, 2007, 4:29 PM CDT for 5 counties in Illinois; 86 counties in Missouri. It was in force for 31 min.

The area

The outline as issued.

The facts

Issued
Oct 17, 2007, 4:29 PM CDT (21:29 UTC)
Expired
Oct 17, 2007, 5:00 PM CDT
In force
31 min
Issued by
the Storm Prediction Center
All 91 counties

Adams County, IL, Calhoun County, IL, Jersey County, IL, Monroe County, IL, Pike County, IL, Adair County, MO, Audrain County, MO, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Carter County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Christian County, MO, City of Saint Louis, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Howell County, MO, Iron County, MO, Jackson County, MO, Jasper County, MO, Jefferson County, MO, Johnson County, MO, Knox County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Reynolds County, MO, Ripley County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shannon County, MO, Shelby County, MO, St. Clair County, MO, Stone County, MO, Sullivan County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 138 km from the middle of the area, began a volume at 21:32 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 12:00Z, 9.5 hours before the alert went out and 188 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 2007-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 389 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 2007-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.1939587897Sfc1 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
389 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
218 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

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
Oct 17, 4:07 AM CDTMesoscale DiscussionSPCBarton, Bates, Cass, Cedar, Dade, Greene and 8 more113 min
Oct 17, 10:24 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Cass, Cedar and 14 more96 min
Oct 17, 10:43 AM CDTTornado WatchSPCBarry, Barton, Bates, Benton, Cedar, Christian and 16 more7 hr
Oct 17, 5:30 PM CDTTornado WatchSPCAudrain, Barry, Barton, Bates, Benton, Boone and 53 more6 hr
Oct 17, 6:23 PM CDTMesoscale DiscussionSPCPlatte37 min

Nearby

Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Illinois, 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.