Alert archive / Missouri / Tornado Warnings in 2015
Tornado Warning 4, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 8, 2015, 3:20 PM CDT for Jefferson County, Saint Francois County, Washington County, Missouri. It was in force for 25 min. 18 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 8, 2015, 3:20 PM CDT (20:20 UTC)
- Expired
- Apr 8, 2015, 3:45 PM CDT
- In force
- 25 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.75 in
Counties Jefferson County, MO, Saint Francois County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 73 km from the middle of the area, began a volume at 20:24 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 3:28 PM CDT | FUNNEL CLOUD | 1 E Potosi, MO | ABOUT HALFWAY DOWN TO THE GROUND. SPOTTER LOOKING TO THE NORTHWEST. NEAR INTERSECTION OF MISSOURI HIGHWAY 8 AND COUNTY ROADS O AND U. |
| Apr 8, 3:33 PM CDT | TSTM WND DMG | 4 N Potosi, MO | LARGE TREE DOWN BLOCKING ROUTE 21 WITH NUMEROUS SMALL LIMBS ALSO DOWN. TIME ESTIMATED FROM RADAR. |
| Apr 8, 3:33 PM CDT | TSTM WND DMG | Potosi, MO | ROOF DAMAGE TO THE NEWSPAPER BUILDING. RELAYED BY KMOV TV. EVENT TIME IS ESTIMATED BY RADAR. |
| Apr 8, 3:33 PM CDT | TSTM WND GST 70 | Potosi, MO | |
| Apr 8, 3:33 PM CDT | HAIL 0.25 | Potosi, MO | |
| Apr 8, 3:35 PM CDT | FUNNEL CLOUD | 2 E Potosi, MO | OBSERVER LOOKING WEST. FUNNEL APPROXIMATELY HALFWAY DOWN TO THE GROUND. |
| Apr 8, 3:35 PM CDT | TSTM WND DMG | Potosi, MO | ROOFS BLOWN OFF BUILDINGS. |
| Apr 8, 3:35 PM CDT | TSTM WND DMG | Potosi, MO | TREES UPROOTED AND SOME SNAPPED. PARTIAL BUILDING COLLAPSE ON MAIN STREET. POWER LINES DOWN. |
| Apr 8, 3:37 PM CDT | TORNADO | Potosi, MO | EF1 TORNADO. APPROX. 5 MILE LONG TRACK THROUGH CENTER OF TOWN. APPROX. 50 YARDS WIDE. |
| Apr 8, 3:37 PM CDT | TORNADO | Potosi, MO | |
| Apr 8, 3:38 PM CDT | TSTM WND DMG | Mineral Point, MO | HARBISON SAWMILL DESTROYED ON HIGHWAY 8 IN MINERAL POINT. TIME ESTIMATED FROM RADAR. |
| Apr 8, 3:38 PM CDT | TSTM WND DMG | Potosi, MO | POWER LINES DOWN IN POTOSI... RELAYED BY WASHINGTON COUNTY 911. |
| Apr 8, 3:40 PM CDT | TSTM WND DMG | Potosi, MO | ROOF BLOWN OFF LIONS DEN IN POTOSI... RELAYED BY WASHINGTON COUNTY OFFICIAL. |
| Apr 8, 3:43 PM CDT | HAIL 0.7 | Potosi, MO | |
| Apr 8, 3:43 PM CDT | HAIL 2 | 7 Wnw Potosi, MO | |
| Apr 8, 3:43 PM CDT | HAIL 2.75 | 7 Wnw Potosi, MO | |
| Apr 8, 3:44 PM CDT | HAIL 0.7 | Potosi, MO | HIGH WIND... HEAVY RAIN... AND HAIL AT HWY E AND 21 INTERSECTION. |
| Apr 8, 3:55 PM CDT | HAIL 1 | Potosi, MO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 8, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.3 hours before the alert went out and 297 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
- 2027 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
441
WFUS53 KLSX 082020
TORLSX
MOC099-187-221-082045-
/O.NEW.KLSX.TO.W.0004.150408T2020Z-150408T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
320 PM CDT WED APR 8 2015
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTH CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 345 PM CDT
* AT 319 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 8 MILES NORTHWEST OF POTOSI...AND MOVING EAST
AT 30 MPH.
HAZARD...TORNADO AND GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
* THIS DANGEROUS STORM WILL BE NEAR...
POTOSI AROUND 330 PM CDT.
OLD MINES AND MINERAL POINT AROUND 335 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE CADET AND BLACKWELL.
THIS WARNING INCLUDES WASHINGTON STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3816 9062 3796 9056 3789 9096 3806 9101
TIME...MOT...LOC 2020Z 254DEG 28KT 3799 9090
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
TRUETT2 follow-up statements
052
WWUS53 KLSX 082028
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
328 PM CDT WED APR 8 2015
MOC099-187-221-082045-
/O.CON.KLSX.TO.W.0004.000000T0000Z-150408T2045Z/
JEFFERSON MO-ST. FRANCOIS MO-WASHINGTON MO-
328 PM CDT WED APR 8 2015
...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL WASHINGTON...
NORTHERN ST. FRANCOIS AND SOUTH CENTRAL JEFFERSON COUNTIES UNTIL 345
PM CDT...
AT 326 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR POTOSI...AND MOVING EAST AT 30 MPH.
HAZARD...TORNADO AND GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
THIS DANGEROUS STORM WILL BE NEAR...
OLD MINES AND POTOSI AROUND 335 PM CDT.
MINERAL POINT AROUND 340 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE CADET AND BLACKWELL.
THIS WARNING INCLUDES WASHINGTON STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3808 9091 3816 9062 3796 9056 3790 9091
TIME...MOT...LOC 2028Z 269DEG 25KT 3798 9083
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
TRUETT084
WWUS53 KLSX 082031
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
331 PM CDT WED APR 8 2015
MOC099-187-221-082045-
/O.CON.KLSX.TO.W.0004.000000T0000Z-150408T2045Z/
JEFFERSON MO-ST. FRANCOIS MO-WASHINGTON MO-
331 PM CDT WED APR 8 2015
...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL WASHINGTON...
NORTHERN ST. FRANCOIS AND SOUTH CENTRAL JEFFERSON COUNTIES UNTIL 345
PM CDT...
AT 329 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR POTOSI...AND MOVING EAST AT 25 MPH.
HAZARD...TORNADO AND GOLF BALL SIZE HAIL.
SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD TO THE NORTHWEST OF
POTOSI.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
THIS DANGEROUS STORM WILL BE NEAR...
MINERAL POINT AROUND 340 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE CADET.
THIS WARNING INCLUDES WASHINGTON STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3808 9091 3816 9062 3796 9056 3790 9091
TIME...MOT...LOC 2031Z 270DEG 21KT 3797 9082
TORNADO...RADAR INDICATED
HAIL...1.75IN
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 9:23 AM CDT | River Flood Warning | LSX | Jefferson | 4 days |
| 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 |
| Apr 8, 1:07 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 38 min |
| Apr 8, 1:11 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Montgomery, Osage, Warren | 34 min |
| Apr 8, 1:33 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 27 min |
| Apr 8, 1:43 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Warren, Washington | 47 min |
| Apr 8, 2:23 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade | 52 min |
| Apr 8, 2:26 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Jefferson, Washington | 49 min |
| Apr 8, 3:05 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Iron, Jefferson, Washington | 55 min |
| Apr 8, 3:07 PM CDT | Tornado Warning | LSX | Crawford, Washington | 23 min |
| Apr 8, 3:24 PM CDT | Flash Flood Watch | LSX | Boone, Callaway, Cole, Crawford, Franklin, Gasconade and 11 more | 31 hr |
| Apr 8, 3:40 PM CDT | Tornado Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois, Washington | 35 min |
| Apr 8, 3:59 PM CDT | Tornado Warning | LSX | Sainte Genevieve, Saint Francois | 31 min |
| Apr 8, 4:20 PM CDT | Areal Flood Advisory | LSX | Washington | 4 hr |
| Apr 8, 4:26 PM CDT | Tornado Warning | LSX | Sainte Genevieve, Saint Francois | 34 min |
| Apr 8, 4:53 PM CDT | Tornado Warning | LSX | Sainte Genevieve, Saint Francois | 37 min |
| Apr 8, 4:57 PM CDT | Flash Flood Warning | LSX | Sainte Genevieve, Saint Francois, Washington | 4 hr |
| Apr 8, 5:05 PM CDT | Tornado Warning | LSX | Madison, Sainte Genevieve, Saint Francois | 25 min |
| Apr 8, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois, Washington | 22 min |
| Apr 8, 5:28 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Sainte Genevieve, Saint Francois | 47 min |
| Apr 8, 5:50 PM CDT | Flash Flood Warning | LSX | Sainte Genevieve, Saint Francois | 3 hr |
| Apr 8, 6:14 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Sainte Genevieve, Saint Francois | 46 min |
| Apr 8, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Moniteau, Monroe | 33 min |
| Apr 8, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe, Shelby | 49 min |
Nearby
Tornado Warnings in Missouri, 2015Every tornado warning in 2015Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.