Alert archive / Missouri / Tornado Watches in 2008

Tornado Watch 473

June 6, 200853 counties in Illinois; 54 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jun 6, 2008, 12:13 PM CDT for 53 counties in Illinois; 54 counties in Missouri. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jun 6, 2008, 12:13 PM CDT (17:13 UTC)
Expired: Jun 6, 2008, 9:00 PM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 107 counties

Alexander County, IL, Bond County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Greene County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pike County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Barry County, MO, Bollinger County, MO, Butler County, MO, Camden County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, City of Saint Louis, 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, Howell County, MO, Iron County, MO, Jasper County, MO, Jefferson County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Montgomery County, MO, Newton County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 76 km from the middle of the area, began a volume at 17:14 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 40%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

56 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 6, 12:14 PM CDT	Severe Thunderstorm Warning	SGF	Laclede	31 min
Jun 6, 12:44 PM CDT	Tornado Warning	SGF	Laclede, Pulaski	31 min
Jun 6, 12:54 PM CDT	Flash Flood Warning	SGF	Phelps	5 hr
Jun 6, 1:15 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
Jun 6, 1:22 PM CDT	Tornado Warning	SGF	Phelps	38 min
Jun 6, 1:32 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Phelps, Pulaski	45 min
Jun 6, 1:44 PM CDT	Flash Flood Warning	SGF	Dade, Jasper	9 hr
Jun 6, 1:47 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Washington	43 min
Jun 6, 1:51 PM CDT	Tornado Warning	LSX	Crawford	54 min
Jun 6, 1:57 PM CDT	Flash Flood Warning	LSX	Crawford, Franklin, Washington	8 hr
Jun 6, 1:57 PM CDT	Tornado Warning	SGF	Phelps	18 min
Jun 6, 2:15 PM CDT	Tornado Warning	SGF	Phelps	22 min
Jun 6, 2:21 PM CDT	Tornado Warning	LSX	Monroe, Saint Clair	39 min
Jun 6, 2:30 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
Jun 6, 2:37 PM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Saint Louis, City of Saint Louis	4 hr
Jun 6, 2:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	24 min
Jun 6, 2:54 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair	51 min
Jun 6, 2:58 PM CDT	Flash Flood Warning	LSX	Madison, Saint Clair	4 hr
Jun 6, 3:12 PM CDT	Tornado Warning	LSX	Monroe	48 min
Jun 6, 3:32 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Madison, Montgomery	43 min
Jun 6, 3:38 PM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Madison, Montgomery	7 hr
Jun 6, 3:43 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair	47 min
Jun 6, 3:46 PM CDT	Severe Thunderstorm Warning	ILX	Effingham, Moultrie, Shelby	59 min
Jun 6, 3:52 PM CDT	Flash Flood Warning	LSX	Monroe, Saint Clair	4 hr
Jun 6, 4:03 PM CDT	Tornado Warning	ILX	Coles, Cumberland, Effingham, Shelby	42 min
Jun 6, 4:17 PM CDT	Tornado Warning	SGF	Wright	28 min
Jun 6, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Marion	42 min
Jun 6, 4:22 PM CDT	Tornado Warning	LSX	Bond, Clinton	23 min
Jun 6, 4:26 PM CDT	Severe Thunderstorm Warning	SGF	Barry	49 min
Jun 6, 4:28 PM CDT	Tornado Warning	ILX	Coles, Douglas, Edgar	47 min
Jun 6, 4:32 PM CDT	Flash Flood Warning	ILX	Shelby	4 hr
Jun 6, 4:38 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Crawford, Cumberland, Edgar, Jasper	50 min
Jun 6, 4:41 PM CDT	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion	40 min
Jun 6, 4:44 PM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Marion	6 hr
Jun 6, 4:55 PM CDT	Tornado Warning	ILX	Edgar, Vermilion	21 min
Jun 6, 5:02 PM CDT	Tornado Warning	ILX	Clay, Effingham	43 min
Jun 6, 5:30 PM CDT	Flash Flood Warning	SGF	Phelps, Pulaski	7 hr
Jun 6, 5:36 PM CDT	Tornado Warning	ILX	Clay, Effingham, Jasper	39 min
Jun 6, 5:57 PM CDT	Tornado Warning	LSX	Crawford, Washington	48 min
Jun 6, 6:01 PM CDT	Tornado Warning	ILX	Clark, Crawford, Jasper	44 min
Jun 6, 6:23 PM CDT	Flash Flood Warning	ILX	Clay, Effingham, Jasper	6 hr
Jun 6, 6:24 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	29 min
Jun 6, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton	30 min
Jun 6, 6:28 PM CDT	Severe Thunderstorm Warning	SGF	Cedar, Dade, Polk	47 min
Jun 6, 6:36 PM CDT	Tornado Warning	LSX	Washington	39 min
Jun 6, 6:41 PM CDT	Tornado Warning	SGF	Polk	64 min
Jun 6, 6:43 PM CDT	Flash Flood Warning	ILX	Clark, Crawford	5 hr
Jun 6, 6:55 PM CDT	Flash Flood Warning	SGF	Cedar, Hickory, Polk, St. Clair	6 hr
Jun 6, 7:04 PM CDT	Tornado Warning	LSX	Jefferson, Washington	20 min
Jun 6, 7:10 PM CDT	Tornado Warning	SGF	Camden, Dallas, Hickory	40 min
Jun 6, 7:11 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	22 min
Jun 6, 7:21 PM CDT	Flash Flood Warning	LSX	Monroe, Saint Clair	3 hr
Jun 6, 7:29 PM CDT	Flash Flood Warning	ILX	Effingham	5 hr
Jun 6, 7:35 PM CDT	Tornado Warning	ILX	Clay	40 min
Jun 6, 7:59 PM CDT	Tornado Warning	SGF	Miller	35 min
Jun 6, 8:48 PM CDT	Flash Flood Warning	ILX	Clark, Cumberland	4 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.2 hours before the alert went out and 274 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: 1408 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 563 m²/s²
0-3 km storm-relative helicity: 601 m²/s²
Significant tornado parameter: 5.5
Supercell composite: 21.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 9:57 PM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Madison, Washington	6 hr
Jun 6, 4:19 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Madison, Washington	26 min
Jun 5, 9:43 PM CDT	Tornado Watch	SPC	Adams, Brown, Hancock, Pike	7 hr
Jun 6, 5:14 AM CDT	Mesoscale Discussion	SPC	Bond, Boone, Bureau, Calhoun, Cass, Christian and 39 more	61 min
Jun 6, 10:50 AM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 53 more	85 min
Jun 6, 1:05 PM CDT	Tornado Watch	SPC	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	5 hr
Jun 6, 2:27 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Effingham, Fayette, Madison and 6 more	93 min
Jun 5, 7:44 PM CDT	Mesoscale Discussion	SPC	Atchison, Holt, Nodaway, Worth	91 min
Jun 5, 9:39 PM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Caldwell, Carroll, Cass and 22 more	66 min

Nearby

Tornado Watches in Missouri, 2008 Tornado Watches in Illinois, 2008 Every tornado watch 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.