Alert archive / Missouri / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 217

June 4, 201414 counties in Illinois; 25 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 4, 2014, 5:00 AM CDT for 14 counties in Illinois; 25 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jun 4, 2014, 5:00 AM CDT (10:00 UTC)
Expired: Jun 4, 2014, 8:51 AM CDT
In force: 4 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 39 counties

Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Callaway County, MO, Camden County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Montgomery County, MO, Osage County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 10:00 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: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 10%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 4, 6:21 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis	39 min
Jun 4, 6:54 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson	12 min

Discussions around it

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.0 hours before the alert went out and 287 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2429 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 8:05 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Greene, Jersey, Morgan and 2 more	85 min
Jun 3, 9:25 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Pike	5 hr
Jun 3, 11:04 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Fulton, Logan, Mason, Menard, Morgan and 4 more	4 hr
Jun 4, 1:29 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Champaign, Christian and 23 more	91 min
Jun 4, 1:52 AM CDT	Severe Thunderstorm Watch	SPC	Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 6 more	3 hr
Jun 4, 3:46 AM CDT	Mesoscale Discussion	SPC	Champaign, Coles, Douglas, Edgar, Moultrie, Piatt and 2 more	59 min
Jun 4, 7:01 AM CDT	Mesoscale Discussion	SPC	Bond, Clinton, Fayette, Madison, Monroe, Saint Clair	89 min
Jun 4, 12:20 PM CDT	Mesoscale Discussion	SPC	Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more	115 min
Jun 4, 2:21 PM CDT	Tornado Watch	SPC	Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more	6 hr
Jun 4, 6:57 PM CDT	Mesoscale Discussion	SPC	Alexander, Massac, Pope, Pulaski	2 hr
Jun 3, 7:04 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, DeKalb, Gentry, Harrison, Holt and 2 more	56 min
Jun 3, 9:41 PM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Chariton and 16 more	64 min
Jun 3, 11:30 PM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Caldwell, Callaway, Carroll, Cass and 23 more	60 min
Jun 3, 11:45 PM CDT	Severe Thunderstorm Watch	SPC	Audrain, Benton, Boone, Callaway, Carroll, Cass and 25 more	5 hr
Jun 4, 12:28 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Holt, Nodaway, Platte	62 min
Jun 4, 12:50 AM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 11 more	3 hr
Jun 4, 3:32 AM CDT	Mesoscale Discussion	SPC	Benton, Camden, Cole, Cooper, Henry, Johnson and 5 more	88 min
Jun 4, 12:54 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Carter, Dent, Dunklin, Howell and 10 more	2 hr
Jun 4, 3:47 PM CDT	Mesoscale Discussion	SPC	Barry, Camden, Cedar, Christian, Dade, Dallas and 14 more	118 min

Nearby

Severe Thunderstorm Watches in Missouri, 2014 Severe Thunderstorm Watches in Illinois, 2014 Every severe thunderstorm watch in 2014

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.