Alert archive / Missouri / Tornado Warnings in 2012
Tornado Warning 2, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jan 17, 2012, 1:39 AM CST for Franklin County, Jefferson County, Missouri. It was in force for 36 min. 2 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
- Jan 17, 2012, 1:39 AM CST (07:39 UTC)
- Expired
- Jan 17, 2012, 2:15 AM CST
- In force
- 36 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Franklin County, MO, Jefferson County, MO
The radar
The St Louis radar (KLSX), 30 km from the middle of the area, began a volume at 07:40 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 |
|---|---|---|---|
| Jan 17, 2:10 AM CST | HAIL 0.7 | High Ridge, MO | |
| Jan 17, 2:10 AM CST | HAIL 0.88 | St. Clair, 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 |
|---|---|---|---|
| Jan 16, 11:47 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 7.7 hours before the alert went out and 265 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
- 2 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 431 m²/s²
- 0-3 km storm-relative helicity
- 500 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
063
WFUS53 KLSX 170739
TORLSX
MOC071-099-170815-
/O.NEW.KLSX.TO.W.0002.120117T0739Z-120117T0815Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
139 AM CST TUE JAN 17 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 215 AM CST
* AT 136 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 5 MILES WEST OF ST. CLAIR...AND MOVING EAST AT 60
MPH.
* LOCATIONS IMPACTED INCLUDE...
ST. CLAIR...CEDAR HILL...BYRNES MILL...HIGH RIDGE...ANTONIA...
MURPHY...PARKWAY...LONEDELL...DITTMER...HOUSE SPRINGS...PINEY
PARK...MOSELLE...ROBERTSVILLE...GRUBVILLE...CATAWISSA...OERMANN...
SCOTSDALE...OTTO AND PARKDALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.
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 3842 9115 3847 9072 3847 9070 3845 9068
3846 9066 3848 9066 3848 9063 3847 9062
3849 9060 3850 9046 3831 9041 3824 9112
TIME...MOT...LOC 0739Z 258DEG 52KT 3834 9102
$$
TRUETT2 follow-up statements
265
WWUS53 KLSX 170802
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
202 AM CST TUE JAN 17 2012
MOC071-170812-
/O.CAN.KLSX.TO.W.0002.000000T0000Z-120117T0815Z/
FRANKLIN MO-
202 AM CST TUE JAN 17 2012
...THE TORNADO WARNING FOR EASTERN FRANKLIN COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER...ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE...AND
A TORNADO WATCH REMAINS IN EFFECT FOR THE REMAINDER OF THE PREDAWN
HOURS.
LAT...LON 3836 9074 3847 9073 3847 9070 3845 9068
3846 9066 3848 9066 3848 9063 3847 9062
3849 9060 3850 9046 3841 9044
TIME...MOT...LOC 0802Z 253DEG 49KT 3844 9063
$$
MOC099-170815-
/O.CON.KLSX.TO.W.0002.000000T0000Z-120117T0815Z/
JEFFERSON MO-
202 AM CST TUE JAN 17 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN JEFFERSON
COUNTY UNTIL 215 AM CST...
AT 157 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR PACIFIC...MOVING EAST AT 55 MPH.
LOCATIONS IMPACTED INCLUDE...
BYRNES MILL...HIGH RIDGE...MURPHY...HOUSE SPRINGS...SCOTSDALE AND
PARKDALE.
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 3836 9074 3847 9073 3847 9070 3845 9068
3846 9066 3848 9066 3848 9063 3847 9062
3849 9060 3850 9046 3841 9044
TIME...MOT...LOC 0802Z 253DEG 49KT 3844 9063
$$
TRUETT375
WWUS53 KLSX 170816
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
216 AM CST TUE JAN 17 2012
MOC099-170825-
/O.EXP.KLSX.TO.W.0002.000000T0000Z-120117T0815Z/
JEFFERSON MO-
216 AM CST TUE JAN 17 2012
...THE TORNADO WARNING FOR NORTHWESTERN JEFFERSON COUNTY HAS
EXPIRED...
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR NORTH CENTRAL AND NORTHEAST JEFFERSON COUNTY UNTIL 245 AM.
LAT...LON 3836 9074 3847 9073 3847 9070 3845 9068
3846 9066 3848 9066 3848 9063 3847 9062
3849 9060 3850 9046 3841 9044
TIME...MOT...LOC 0802Z 253DEG 49KT 3844 9063
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 16, 11:59 PM CST | Severe Thunderstorm Warning | LSX | Callaway, Cole, Gasconade, Montgomery, Osage | 58 days |
| Jan 17, 12:39 AM CST | Tornado Warning | LSX | Gasconade, Osage | 36 min |
| Jan 17, 12:55 AM CST | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 35 min |
| Jan 17, 1:14 AM CST | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 31 min |
| Jan 17, 1:23 AM CST | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 37 min |
| Jan 17, 1:41 AM CST | Tornado Warning | LSX | Crawford, Franklin | 34 min |
| Jan 17, 2:08 AM CST | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis, City of Saint Louis | 37 min |
| Jan 17, 2:12 AM CST | Tornado Warning | LSX | Franklin, Jefferson, Washington | 33 min |
| Jan 17, 2:35 AM CST | Tornado Warning | LSX | Jefferson, Saint Louis | 40 min |
| Jan 17, 4:18 AM CST | Severe Thunderstorm Warning | LSX | Crawford | 27 min |
| Jan 17, 4:34 AM CST | Areal Flood Advisory | LSX | Cole, Crawford, Franklin, Gasconade, Jefferson, Saint Charles and 3 more | 60 days |
| Jan 17, 5:22 AM CST | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve | 38 min |
| Jan 17, 6:01 AM CST | Severe Thunderstorm Warning | LSX | Iron, Sainte Genevieve, Saint Francois, Washington | 44 min |
| Jan 17, 6:25 AM CST | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 50 min |
Nearby
Tornado Warnings in Missouri, 2012Every tornado warning in 2012Tornadoes in 2012
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.