Alert archive / Missouri / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 31
The Storm Prediction Center issued this severe thunderstorm watch at Apr 8, 2015, 6:39 AM CDT for 60 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2015, 6:39 AM CDT (11:39 UTC)
- Expired
- Apr 8, 2015, 1:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 50 kt
All 60 counties
Adair County, MO, Audrain 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, Cass County, MO, Cedar County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Daviess County, MO, DeKalb County, MO, Gasconade County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Laclede County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Mercer County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Shelby County, MO, St. Clair County, MO, Sullivan County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 81 km from the middle of the area, began a volume at 11:41 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 6:52 AM CDT | Severe Thunderstorm Warning | SGF | Vernon | 53 min |
| Apr 8, 7:12 AM CDT | Severe Thunderstorm Warning | EAX | Bates, Cass | 25 min |
| Apr 8, 7:14 AM CDT | Severe Thunderstorm Warning | EAX | Jackson, Ray | 46 min |
| Apr 8, 7:45 AM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 30 min |
| Apr 8, 7:46 AM CDT | Severe Thunderstorm Warning | SGF | Vernon | 44 min |
| Apr 8, 7:53 AM CDT | Severe Thunderstorm Warning | EAX | Carroll, Livingston | 37 min |
| Apr 8, 8:02 AM CDT | Severe Thunderstorm Warning | EAX | Johnson | 43 min |
| Apr 8, 8:10 AM CDT | Severe Thunderstorm Warning | SGF | Cedar, St. Clair | 50 min |
| Apr 8, 8:17 AM CDT | Severe Thunderstorm Warning | EAX | Carroll | 28 min |
| Apr 8, 8:35 AM CDT | Severe Thunderstorm Warning | EAX | Johnson | 44 min |
| Apr 8, 8:37 AM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Carroll, Livingston | 38 min |
| Apr 8, 8:54 AM CDT | Severe Thunderstorm Warning | SGF | Benton, Hickory, St. Clair | 51 min |
| Apr 8, 9:02 AM CDT | Severe Thunderstorm Warning | EAX | Chariton, Linn, Macon, Randolph | 38 min |
| Apr 8, 9:15 AM CDT | Severe Thunderstorm Warning | EAX | Pettis, Saline | 45 min |
| Apr 8, 9:46 AM CDT | Severe Thunderstorm Warning | SGF | Benton, Camden, Morgan | 44 min |
| Apr 8, 9:52 AM CDT | Severe Thunderstorm Warning | EAX | Cooper, Howard, Saline | 19 min |
| Apr 8, 11:24 AM CDT | Severe Thunderstorm Warning | SGF | Miller | 36 min |
| Apr 8, 11:33 AM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 42 min |
| Apr 8, 12:36 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 39 min |
| Apr 8, 12:46 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway | 44 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
Topeka, KS (KFOE), launched 00:00Z, 11.7 hours before the alert went out and 202 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.
- Mixed-layer CAPE
- 1427 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 1716 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 8:24 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Bates, Benton, Cass, Cedar, Cooper and 13 more | 5 hr |
| Apr 7, 10:13 PM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Cass, Cedar, Henry and 6 more | 2 hr |
| Apr 8, 6:17 AM CDT | Mesoscale Discussion | SPC | Bates, Benton, Boone, Callaway, Camden, Cass and 19 more | 88 min |
| Apr 8, 9:33 AM CDT | Mesoscale Discussion | SPC | Adair, Audrain, Benton, Boone, Caldwell, Callaway and 45 more | 57 min |
| Apr 8, 12:01 PM CDT | Mesoscale Discussion | SPC | Cole, Crawford, Dent, Franklin, Gasconade, Iron and 15 more | 59 min |
| Apr 8, 12:50 PM CDT | Mesoscale Discussion | SPC | Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Osage and 4 more | 85 min |
| Apr 8, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | Callaway, Crawford, Franklin, Gasconade, Jefferson, Lincoln and 10 more | 5 hr |
| Apr 8, 2:21 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cass and 16 more | 114 min |
| Apr 8, 2:43 PM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Gasconade, Jefferson, Lincoln, Montgomery and 9 more | 92 min |
| Apr 8, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Bates, Benton, Camden, Cass and 29 more | 4 hr |
| Apr 8, 3:42 PM CDT | Mesoscale Discussion | SPC | Iron, Jefferson, Perry, Sainte Genevieve, Saint Francois, Washington | 63 min |
| Apr 8, 4:07 PM CDT | Tornado Watch | SPC | Bollinger, Cape Girardeau, Iron, Jefferson, Madison, Perry and 3 more | 4 hr |
| Apr 8, 5:45 PM CDT | Mesoscale Discussion | SPC | Audrain, Bates, Benton, Boone, Caldwell, Callaway and 39 more | 60 min |
Nearby
Severe Thunderstorm Watches in Missouri, 2015Every severe thunderstorm watch in 2015
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.