Alert archive / Missouri / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 55, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 15, 2011, 2:54 PM CDT for 7 counties in Missouri; Calhoun County, Illinois. It was in force for 51 min. 11 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 15, 2011, 2:54 PM CDT (19:54 UTC)
- Expired
- Apr 15, 2011, 3:45 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Pike County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 26 km from the middle of the area, began a volume at 19:57 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 15, 2:54 PM CDT | HAIL 0.25 | 6 Ene Marthasville, MO | |
| Apr 15, 3:05 PM CDT | HAIL 0.25 | New Melle, MO | |
| Apr 15, 3:06 PM CDT | HAIL 1.75 | Gray Summit, MO | |
| Apr 15, 3:07 PM CDT | HAIL 1.75 | Gray Summit, MO | |
| Apr 15, 3:16 PM CDT | HAIL 0.25 | Moscow Mills, MO | |
| Apr 15, 3:17 PM CDT | HAIL 0.25 | Lake St. Louis, MO | AT HIGHWAY 40 AND ROUTE N ON THE CITY LINE BETWEEN OFALLON AND LAKE ST LOUIS |
| Apr 15, 3:19 PM CDT | HAIL 0.25 | Lake St. Louis, MO | |
| Apr 15, 3:22 PM CDT | HAIL 0.25 | 2 Sse St. Peters, MO | |
| Apr 15, 3:23 PM CDT | HAIL 0.25 | 5 Se Lake St. Louis, MO | PEA SIZE HAIL AND WIND GUST TO 40 MILES PER HOUR AT LAKE SAINT LOUIS BLVD AND HWY 40. |
| Apr 15, 3:27 PM CDT | HAIL 0.7 | St. Peters, MO | AT MID RIVERS MALL DRIVE AND MEXICO DRIVE. |
| Apr 15, 3:48 PM CDT | HAIL 0.5 | Brussels, IL |
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 15, 12:47 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.9 hours before the alert went out and 232 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1776 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
117 WUUS53 KLSX 151954 SVRLSX ILC013-MOC071-099-113-163-183-189-219-152045- /O.NEW.KLSX.SV.W.0055.110415T1954Z-110415T2045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 254 PM CDT FRI APR 15 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALHOUN COUNTY IN SOUTHWEST ILLINOIS... NORTHEASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI... NORTHWESTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... LINCOLN COUNTY IN EAST CENTRAL MISSOURI... SOUTHEASTERN PIKE COUNTY IN NORTHEAST MISSOURI... ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI... WESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI... EASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 345 PM CDT * AT 253 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM TROY TO PACIFIC...AND MOVING NORTHEAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... PACIFIC...TROY...WENTZVILLE...EUREKA...LAKE ST. LOUIS...WILDWOOD... DARDENNE PRAIRIE...O'FALLON...ST. PAUL...WELDON SPRING... ELLISVILLE...COTTLEVILLE...CLARKSON VALLEY...CHESTERFIELD... BALLWIN...VALLEY PARK...MANCHESTER...ST. PETERS...ELSBERRY AND TOWN AND COUNTRY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3929 9077 3861 9033 3833 9084 3909 9123 TIME...MOT...LOC 1954Z 235DEG 42KT 3900 9102 3847 9078 WIND...HAIL 60MPH 1.00IN $$ GLASS
2 follow-up statements
324
WWUS53 KLSX 152021
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
321 PM CDT FRI APR 15 2011
MOC071-099-189-219-152031-
/O.CAN.KLSX.SV.W.0055.000000T0000Z-110415T2045Z/
JEFFERSON MO-FRANKLIN MO-ST. LOUIS MO-WARREN MO-
321 PM CDT FRI APR 15 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WARREN...ST. LOUIS...
NORTHEASTERN FRANKLIN AND NORTHWESTERN JEFFERSON COUNTIES IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF**!
THE WARNED AREA.
LAT...LON 3929 9077 3881 9046 3879 9048 3868 9065
3868 9067 3866 9069 3862 9076 3883 9096
3887 9096 3887 9101 3909 9123
TIME...MOT...LOC 2021Z 202DEG 47KT 3927 9100 3874 9076
$$
ILC013-MOC113-163-183-152045-
/O.CON.KLSX.SV.W.0055.000000T0000Z-110415T2045Z/
CALHOUN IL-ST. CHARLES MO-LINCOLN MO-PIKE MO-
321 PM CDT FRI APR 15 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CALHOUN COUNTY
IN SOUTHWEST ILLINOIS...AND LINCOLN AND WESTERN ST. CHARLES COUNTIES
IN EAST CENTRAL MISSOURI...AND SOUTHEASTERN PIKE COUNTY IN NORTHEAST
MISSOURI UNTIL 345 PM CDT...
AT 319 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM EOLIA TO DARDENNE PRAIRIE...
MOVING NORTH AT 55 MPH.
LOCATIONS IMPACTED INCLUDE...
COTTLEVILLE...O'FALLON...ST. PETERS...ST. PAUL...ST. CHARLES...
ELSBERRY...HARVESTER...WINFIELD...NEW HOPE...OLD MONROE...
KAMPVILLE...FOLEY...GOLDEN EAGLE...ANNADA...BRUSSELS...
BEECHVILLE...BATCHTOWN AND MEPPEN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3929 9077 3881 9046 3879 9048 3868 9065
3868 9067 3866 9069 3862 9076 3883 9096
3887 9096 3887 9101 3909 9123
TIME...MOT...LOC 2021Z 202DEG 47KT 3927 9100 3874 9076
WIND...HAIL 60MPH 1.00IN
$$
GLASS510
WWUS53 KLSX 152044
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
344 PM CDT FRI APR 15 2011
ILC013-MOC113-163-183-152054-
/O.EXP.KLSX.SV.W.0055.000000T0000Z-110415T2045Z/
CALHOUN IL-ST. CHARLES MO-LINCOLN MO-PIKE MO-
344 PM CDT FRI APR 15 2011
...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN COUNTY IN SOUTHWEST
ILLINOIS...AND LINCOLN AND WESTERN ST. CHARLES COUNTIES IN EAST
CENTRAL MISSOURI...AND SOUTHEASTERN PIKE COUNTY IN NORTHEAST MISSOURI
WILL EXPIRE AT 345 PM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 900 PM.
LAT...LON 3929 9077 3881 9046 3879 9048 3868 9065
3868 9067 3866 9069 3862 9076 3883 9096
3887 9096 3887 9101 3909 9123
TIME...MOT...LOC 2044Z 202DEG 47KT 3955 9085 3902 9061
$$
GLASSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 1:09 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 51 min |
| Apr 15, 1:53 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 35 min |
| Apr 15, 2:00 PM CDT | Severe Thunderstorm Warning | LSX | Lewis, Marion, Ralls | 45 min |
| Apr 15, 2:20 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Warren | 40 min |
| Apr 15, 2:23 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 22 min |
| Apr 15, 2:52 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 53 min |
| Apr 15, 3:32 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 43 min |
| Apr 15, 3:52 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Francois | 38 min |
| Apr 15, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 42 min |
| Apr 15, 4:21 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 39 min |
| Apr 15, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 47 min |
| Apr 15, 4:08 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 18 min |
| Apr 15, 4:12 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Pike | 48 min |
| Apr 15, 4:13 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 47 min |
| Apr 15, 4:54 PM CDT | Tornado Warning | LSX | Macoupin | 38 min |
| Apr 15, 4:56 PM CDT | Tornado Warning | LSX | Montgomery | 34 min |
| Apr 15, 5:10 PM CDT | Tornado Warning | LSX | Madison, Saint Clair | 35 min |
| Apr 15, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 38 min |
| Apr 15, 6:05 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 40 min |
| Apr 15, 6:07 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 53 min |
| Apr 15, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 28 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2011Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
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.