Alert archive / Missouri / Tornado Warnings in 2012
Tornado Warning 5, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jan 17, 2012, 2:35 AM CST for Monroe County, Illinois; Jefferson County, Saint Louis County, Missouri. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jan 17, 2012, 2:35 AM CST (08:35 UTC)
- Expired
- Jan 17, 2012, 3:15 AM CST
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Monroe County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 45 km from the middle of the area, began a volume at 08:35 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.
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, 8.6 hours before the alert went out and 251 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.
533 WFUS53 KLSX 170835 TORLSX ILC133-MOC099-189-170915- /O.NEW.KLSX.TO.W.0005.120117T0835Z-120117T0915Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 235 AM CST TUE JAN 17 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN MONROE COUNTY IN SOUTHWEST ILLINOIS... NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... EXTREME SOUTHEASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 315 AM CST * AT 231 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR DITTMER...OR 7 MILES SOUTHWEST OF CEDAR HILL...AND MOVING EAST AT 55 MPH. * LOCATIONS IMPACTED INCLUDE... CEDAR HILL...ANTONIA...BARNHART...ARNOLD...OAKVILLE...COLUMBIA... WATERLOO...HOUSE SPRINGS...FOUNTAIN...SCOTSDALE...OTTO...KIMMSWICK AND NEW HANDOVER. 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 3835 9007 3823 9077 3839 9075 3851 9025 TIME...MOT...LOC 0835Z 253DEG 49KT 3830 9066 $$ TRUETT
2 follow-up statements
175
WWUS53 KLSX 170849
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
249 AM CST TUE JAN 17 2012
ILC133-MOC099-189-170915-
/O.CON.KLSX.TO.W.0005.000000T0000Z-120117T0915Z/
MONROE IL-JEFFERSON MO-ST. LOUIS MO-
249 AM CST TUE JAN 17 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ST. LOUIS...
CENTRAL JEFFERSON AND NORTHWESTERN MONROE COUNTIES UNTIL 315 AM
CST...
AT 248 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR ANTONIA...MOVING EAST AT 55 MPH.
LOCATIONS IMPACTED INCLUDE...
BARNHART...ARNOLD...OAKVILLE...COLUMBIA...FOUNTAIN...KIMMSWICK AND
NEW HANDOVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3835 9007 3826 9058 3827 9059 3839 9057
3851 9025
TIME...MOT...LOC 0850Z 255DEG 47KT 3832 9045
$$
TRUETT816
WWUS53 KLSX 170903
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
303 AM CST TUE JAN 17 2012
MOC099-189-170912-
/O.CAN.KLSX.TO.W.0005.000000T0000Z-120117T0915Z/
JEFFERSON MO-ST. LOUIS MO-
303 AM CST TUE JAN 17 2012
...THE TORNADO WARNING FOR EXTREME SOUTHERN ST. LOUIS AND CENTRAL
JEFFERSON COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3830 9031 3830 9037 3839 9034 3841 9032
3845 9018 3835 9007
TIME...MOT...LOC 0902Z 258DEG 49KT 3835 9024
$$
ILC133-170915-
/O.CON.KLSX.TO.W.0005.000000T0000Z-120117T0915Z/
MONROE IL-
303 AM CST TUE JAN 17 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN MONROE COUNTY
UNTIL 315 AM CST...
AT 300 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR FOUNTAIN...OR 6 MILES WEST OF
WATERLOO...MOVING EAST AT 55 MPH. RADAR IS INDICATING STRONG
ROTATION WITH THIS STORM...SO TAKE COVER NOW. DONT WAIT...THIS
STORM IS MOVING RAPIDLY...AND IF YOU WAIT UNTIL YOU SEE OR HEAR A
TORNADO IT MAY BE TOO LATE.
LOCATIONS IMPACTED INCLUDE...
NEW HANDOVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.
&&
LAT...LON 3830 9031 3830 9037 3839 9034 3841 9032
3845 9018 3835 9007
TIME...MOT...LOC 0902Z 258DEG 49KT 3835 9024
$$
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 | Macoupin, Montgomery | 58 days |
| Jan 17, 1:23 AM CST | Severe Thunderstorm Warning | LSX | Calhoun | 37 min |
| Jan 17, 2:08 AM CST | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 37 min |
| Jan 17, 2:17 AM CST | Severe Thunderstorm Warning | LSX | Madison | 28 min |
| Jan 17, 2:38 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Madison, Saint Clair | 52 min |
| Jan 17, 2:39 AM CST | Severe Thunderstorm Warning | LSX | Bond | 36 min |
| Jan 17, 3:07 AM CST | Tornado Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 38 min |
| Jan 17, 3:23 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Marion | 35 min |
| Jan 17, 3:46 AM CST | Tornado Warning | LSX | Clinton, Washington | 29 min |
| Jan 17, 4:34 AM CST | Areal Flood Advisory | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Marion and 4 more | 60 days |
| Jan 17, 5:14 AM CST | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 46 min |
| Jan 17, 5:22 AM CST | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 38 min |
| Jan 17, 5:47 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 43 min |
| Jan 17, 5:53 AM CST | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 52 min |
| Jan 17, 6:01 AM CST | Severe Thunderstorm Warning | LSX | Randolph | 44 min |
| Jan 17, 6:35 AM CST | Severe Thunderstorm Warning | LSX | Randolph | 25 min |
| 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, 1:39 AM CST | Tornado Warning | LSX | Franklin, Jefferson | 36 min |
| Jan 17, 1:41 AM CST | Tornado Warning | LSX | Crawford, Franklin | 34 min |
| Jan 17, 2:12 AM CST | Tornado Warning | LSX | Franklin, Jefferson, Washington | 33 min |
| Jan 17, 4:18 AM CST | Severe Thunderstorm Warning | LSX | Crawford | 27 min |
| Jan 17, 6:25 AM CST | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 50 min |
Nearby
Tornado Warnings in Missouri, 2012Tornado Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.