Alert archive / Missouri / Tornado Watches in 2015
Tornado Watch 158
The Storm Prediction Center issued this tornado watch at May 10, 2015, 1:22 PM CDT for 60 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 10, 2015, 1:22 PM CDT (18:22 UTC)
- Expired
- May 10, 2015, 5:20 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 60 counties
Adair County, MO, Audrain County, MO, Benton County, MO, Boone County, MO, Butler County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Carter County, MO, Chariton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dallas County, MO, Daviess County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Grundy County, MO, Harrison County, MO, Hickory County, MO, Howard County, MO, Howell County, MO, Iron County, MO, Knox County, MO, Laclede County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Madison County, MO, Maries County, MO, Mercer County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Pettis County, MO, Phelps County, MO, Pulaski County, MO, Putnam County, MO, Randolph County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Saline County, MO, Schuyler County, MO, Shannon County, MO, Shelby County, MO, Sullivan County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO
The radar
The Pleasant Hill radar (KEAX), 133 km from the middle of the area, began a volume at 18:26 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
- 70%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
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 |
|---|---|---|---|---|
| May 10, 2:09 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Linn, Livingston, Sullivan | 36 min |
| May 10, 4:18 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison | 42 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 12:00Z, 6.4 hours before the alert went out and 250 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
- 493 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 718 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
535 WWUS20 KWNS 101819 SEL8 SPC WW 101819 MOZ000-110000- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 158 NWS STORM PREDICTION CENTER NORMAN OK 120 PM CDT SUN MAY 10 2015 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF NORTH CENTRAL THROUGH SOUTH CENTRAL MISSOURI * EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 700 PM CDT. * PRIMARY THREATS INCLUDE... A COUPLE TORNADOES POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE SUMMARY...WESTERN MO SQUALL LINE EXPECTED TO CONTINUE EASTWARD...POSING SOME THREAT FOR DAMAGING WIND...MARGINALLY SEVERE HAIL...AND A COUPLE TORNADOES THROUGH EARLY TONIGHT. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF KIRKSVILLE MISSOURI TO 30 MILES EAST SOUTHEAST OF WEST PLAINS MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. && OTHER WATCH INFORMATION...CONTINUE...WW 154...WW 155...WW 156...WW 157... AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24040. ...CORFIDI
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 11:00 AM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Boone, Camden, Cedar and 32 more | 3 hr |
| May 10, 11:52 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Caldwell, Carroll, Chariton, Clinton and 14 more | 2 hr |
| May 10, 1:47 PM CDT | Severe Thunderstorm Watch | SPC | Andrew, Atchison, Barry, Barton, Bates, Buchanan and 28 more | 8 hr |
| May 10, 3:13 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Barton, Bates, Buchanan, Caldwell and 17 more | 92 min |
| May 10, 3:52 PM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Franklin and 24 more | 68 min |
| May 10, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Cape Girardeau, Jefferson, Lincoln, Mississippi, New Madrid and 8 more | 4 hr |
| May 10, 6:30 PM CDT | Mesoscale Discussion | SPC | Cape Girardeau, Mississippi, New Madrid, Scott, Stoddard | 90 min |
Nearby
Tornado Watches in Missouri, 2015Every tornado 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.