Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 15, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Mar 4, 2011, 4:40 PM CST for Calhoun County, Greene County, Pike County, Illinois; Pike County, Missouri. It was in force for 51 min. 1 report 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
- Mar 4, 2011, 4:40 PM CST (22:40 UTC)
- Expired
- Mar 4, 2011, 5:31 PM CST
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Calhoun County, IL, Greene County, IL, Pike County, IL, Pike County, MO
The radar
The St Louis radar (KLSX), 95 km from the middle of the area, began a volume at 22:41 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 |
|---|---|---|---|
| Mar 4, 4:50 PM CST | HAIL 0.25 | Bowling Green, 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 |
|---|---|---|---|
| Mar 4, 1:33 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 202 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
- 1266 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
990
WFUS53 KLSX 042240
TORLSX
ILC013-061-149-MOC163-042345-
/O.NEW.KLSX.TO.W.0015.110304T2240Z-110304T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
440 PM CST FRI MAR 4 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
NORTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
PIKE COUNTY IN NORTHEAST MISSOURI...
* UNTIL 545 PM CST
* AT 437 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR CURRYVILLE...OR 5 MILES WEST OF BOWLING
GREEN...AND MOVING EAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
BOWLING GREEN...LOUISIANA...PITTSFIELD...FRANKFORD...PIKE...
CLARKSVILLE...ATLAS...PLEASANT HILL...GRIGGSVILLE...ST. CLEMENT...
CYRENE...ASHBURN...ROCKPORT...SUMMER HILL...NEW HARTFORD...
MARTINSBURG...NEBO...INDEPENDENCE...TIME AND PEARL.
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 3969 9064 3965 9061 3958 9058 3953 9058
3953 9030 3920 9138 3939 9146 3945 9146
3975 9063
TIME...MOT...LOC 2240Z 250DEG 35KT 3934 9126
$$
KANOFSKY3 follow-up statements
084
WWUS53 KLSX 042258
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
458 PM CST FRI MAR 4 2011
ILC013-061-149-MOC163-042345-
/O.CON.KLSX.TO.W.0015.000000T0000Z-110304T2345Z/
CALHOUN IL-GREENE IL-PIKE IL-PIKE MO-
458 PM CST FRI MAR 4 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN GREENE AND
EXTREME NORTHERN CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND
SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND CENTRAL PIKE
COUNTY IN NORTHEAST MISSOURI UNTIL 545 PM CST...
AT 454 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR LOUISIANA...MOVING EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...PIKE...CLARKSVILLE...ATLAS...PLEASANT HILL...
GRIGGSVILLE...ROCKPORT...SUMMER HILL...NEW HARTFORD...
MARTINSBURG...NEBO...INDEPENDENCE...TIME...PEARL...MILTON...
DETROIT...BEDFORD...MONTEZUMA...VALLEY CITY AND FLORENCE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3969 9064 3965 9061 3958 9058 3953 9058
3953 9030 3923 9128 3952 9126 3975 9063
TIME...MOT...LOC 2258Z 250DEG 35KT 3940 9105
$$
KANOFSKY981
WWUS53 KLSX 042315
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
515 PM CST FRI MAR 4 2011
ILC013-061-149-MOC163-042345-
/O.CON.KLSX.TO.W.0015.000000T0000Z-110304T2345Z/
CALHOUN IL-GREENE IL-PIKE IL-PIKE MO-
515 PM CST FRI MAR 4 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN GREENE AND
EXTREME NORTHERN CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND
SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND EAST CENTRAL PIKE
COUNTY IN NORTHEAST MISSOURI UNTIL 545 PM CST...
AT 511 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR PLEASANT HILL...OR 9 MILES EAST OF
LOUISIANA...MOVING EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...GRIGGSVILLE...MARTINSBURG...NEBO...INDEPENDENCE...
TIME...PEARL...MILTON...DETROIT...BEDFORD...MONTEZUMA...VALLEY
CITY...FLORENCE...PATTERSON AND BARROW.
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 3969 9064 3965 9061 3958 9058 3953 9058
3953 9030 3933 9096 3956 9115 3975 9063
TIME...MOT...LOC 2315Z 250DEG 35KT 3945 9085
$$
KANOFSKY084
WWUS53 KLSX 042331
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
531 PM CST FRI MAR 4 2011
ILC013-061-149-MOC163-042342-
/O.CAN.KLSX.TO.W.0015.000000T0000Z-110304T2345Z/
CALHOUN IL-GREENE IL-PIKE IL-PIKE MO-
531 PM CST FRI MAR 4 2011
...THE TORNADO WARNING FOR NORTHWESTERN GREENE AND EXTREME NORTHERN
CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND SOUTHERN PIKE COUNTY IN
WEST CENTRAL ILLINOIS...AND EAST CENTRAL PIKE COUNTY IN NORTHEAST
MISSOURI IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY
HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 10 PM.
LAT...LON 3969 9064 3965 9061 3958 9058 3953 9058
3953 9030 3933 9096 3956 9115 3975 9063
TIME...MOT...LOC 2332Z 250DEG 35KT 3950 9065
$$
KANOFSKYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 4:39 PM CST | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 51 min |
| Mar 4, 5:23 PM CST | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 29 min |
| Mar 4, 2:47 PM CST | Severe Thunderstorm Warning | LSX | Boone | 43 min |
| Mar 4, 3:13 PM CST | Severe Thunderstorm Warning | LSX | Callaway, Cole, Moniteau, Osage | 47 min |
| Mar 4, 3:20 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Boone | 40 min |
| Mar 4, 3:28 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Montgomery | 47 min |
| Mar 4, 3:34 PM CST | Tornado Warning | LSX | Boone, Callaway, Montgomery | 41 min |
| Mar 4, 3:45 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Monroe, Ralls | 45 min |
| Mar 4, 3:49 PM CST | Tornado Warning | LSX | Audrain, Monroe, Pike, Ralls | 56 min |
| Mar 4, 3:59 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 3 more | 46 min |
| Mar 4, 4:27 PM CST | Tornado Warning | LSX | Lincoln, Montgomery, Warren | 33 min |
Nearby
Tornado Warnings in Illinois, 2011Tornado Warnings in Missouri, 2011Every tornado warning in 2011Tornadoes 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.