Alert archive / Missouri / Tornado Warnings in 2013
Tornado Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 20, 2013, 7:30 PM CDT for Marion County, Ralls County, Missouri; Adams County, Pike County, Illinois. It was in force for 30 min. 9 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
- May 20, 2013, 7:30 PM CDT (00:30 UTC)
- Expired
- May 20, 2013, 8:00 PM CDT
- In force
- 30 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.5 in
Counties Adams County, IL, Pike County, IL, Marion County, MO, Ralls County, MO
The radar
The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 00:30 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 |
|---|---|---|---|
| May 20, 7:30 PM CDT | TSTM WND DMG | 1 W Hannibal, MO | NUMEROUS TREES UPROOTED |
| May 20, 7:32 PM CDT | TORNADO | Hannibal, MO | OFFICIAL FROM HANNIBAL LAGRANGE UNIVERSITY REPORTED ROOF REMOVED FROM THE SCIENCE BUILDING. |
| May 20, 7:33 PM CDT | TSTM WND DMG | Payson, IL | DAMAGE TO A GARAGE...POWER POLES SNAPPED AND SEVERAL LARGE TREES UPROOTED IN PAYSON IL. |
| May 20, 7:35 PM CDT | TSTM WND GST 58 | Hannibal, MO | |
| May 20, 7:35 PM CDT | TSTM WND GST 60 | Hull, IL | |
| May 20, 7:35 PM CDT | TSTM WND GST 64 | Fall Creek, IL | AMATEUR RADIO OPERATOR REPOTED ESTIMATED 60 TO 65 MPH. |
| May 20, 7:36 PM CDT | TORNADO | Hannibal, MO | THERE ARE SEVERAL LARGE TREES SNAPPED. - SEVERE DANAGE TO TWO MACHINE SHEDS NEAR HIGHWAY MM. SHINGLES REMOVED AT SOME BUILDINGS IN DOWNTOWN AREA. |
| May 20, 7:45 PM CDT | HAIL 1 | Liberty, IL | ONE INCH HAIL REPORTED IN LIBERTY ILLINOIS. |
| May 20, 8:09 PM CDT | TSTM WND DMG | 1 W Hannibal, MO | NUIMEROUS BRANCHES DOWNED. WIND SPEED 55 MPH. |
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 |
|---|---|---|---|
| May 20, 5:24 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.5 hours before the alert went out and 205 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
- 195 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 1801 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
906
WFUS53 KLSX 210030
TORLSX
ILC001-149-MOC127-173-210100-
/O.NEW.KLSX.TO.W.0021.130521T0030Z-130521T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
730 PM CDT MON MAY 20 2013
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
WEST CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS...
SOUTHEASTERN MARION COUNTY IN NORTHEAST MISSOURI...
NORTHEASTERN RALLS COUNTY IN NORTHEAST MISSOURI...
* UNTIL 800 PM CDT
* AT 725 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR HANNIBAL...AND
MOVING NORTHEAST AT 45 MPH.
HAZARD...DAMAGING TORNADO AND PING PONG BALL SIZE HAIL.
SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. BROADCAST MEDIA ARE
REPORTING A RAIN WRAPPED TORNADO IN HANNIBAL.
IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
EXTENSIVE TREE DAMAGE IS LIKELY.
* THE TORNADO WILL BE NEAR...
FALL CREEK AROUND 735 PM CDT.
PAYSON AROUND 740 PM CDT.
BEVERLY AROUND 755 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE SEEHORN...HULL...PLAINVILLE...
ADAMS...RICHFIELD...LIBERTY...KINGSTON AND KELLERVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A TORNADO IS ON THE GROUND. 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.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 4004 9092 3972 9092 3960 9139 3977 9146
TIME...MOT...LOC 0030Z 241DEG 39KT 3973 9135
TORNADO...OBSERVED
HAIL...1.50IN
$$
BRITT2 follow-up statements
786
WWUS53 KLSX 210045
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
745 PM CDT MON MAY 20 2013
MOC127-173-210052-
/O.CAN.KLSX.TO.W.0021.000000T0000Z-130521T0100Z/
MARION MO-RALLS MO-
745 PM CDT MON MAY 20 2013
...THE TORNADO WARNING FOR NORTHEASTERN RALLS AND SOUTHEASTERN MARION
COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE POSSBILE...AND A TORNADO WATCH
REMAINS IN EFFECT UNTIL 100 AM CDT.
LAT...LON 3969 9131 3982 9137 4004 9092 3972 9092
TIME...MOT...LOC 0042Z 238DEG 38KT 3980 9121
$$
ILC001-149-210100-
/O.CON.KLSX.TO.W.0021.000000T0000Z-130521T0100Z/
PIKE IL-ADAMS IL-
745 PM CDT MON MAY 20 2013
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ADAMS AND
NORTHWESTERN PIKE COUNTIES IN WEST CENTRAL ILLINOIS UNTIL 800 PM
CDT...
AT 739 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR PAYSON...AND MOVING NORTHEAST AT 45 MPH.
HAZARD...DEVELOPING TORNADO AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION. SPOTTERS REPORTED A TORNADO
EARLIER IN HANNIBAL. TRAINED SPOTTERS ARE REPORTING 60 MPH
WINDS IN HULL.
IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
EXTENSIVE TREE DAMAGE IS LIKELY.
THIS DANGEROUS STORM WILL BE NEAR...
BEVERLY AROUND 755 PM CDT.
OTHER LOCATIONS IN THE WARNING INCLUDE RICHFIELD...LIBERTY...KINGSTON
AND KELLERVILLE.
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.
THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!
&&
LAT...LON 3969 9131 3982 9137 4004 9092 3972 9092
TIME...MOT...LOC 0042Z 238DEG 38KT 3980 9121
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
BRITT486 WWUS53 KLSX 210056 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 756 PM CDT MON MAY 20 2013 ILC001-149-210107- /O.EXP.KLSX.TO.W.0021.000000T0000Z-130521T0100Z/ PIKE IL-ADAMS IL- 756 PM CDT MON MAY 20 2013 ...THE TORNADO WARNING FOR SOUTHEASTERN ADAMS AND NORTHWESTERN PIKE COUNTIES IN WEST CENTRAL ILLINOIS WILL EXPIRE AT 800 PM CDT... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. LAT...LON 3969 9131 3982 9137 4004 9092 3972 9092 TIME...MOT...LOC 0057Z 238DEG 38KT 3988 9103 $$ BRITT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:02 PM CDT | Tornado Warning | LSX | Marion, Ralls | 43 min |
| May 20, 7:29 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 46 min |
| May 20, 7:48 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Moniteau | 42 min |
| May 20, 8:10 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 50 min |
| May 20, 8:25 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Osage | 35 min |
| May 20, 8:41 PM CDT | Areal Flood Advisory | LSX | Saint Charles, Saint Louis | 6 hr |
| May 20, 8:51 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Montgomery, Warren | 39 min |
| May 20, 9:21 PM CDT | Flash Flood Warning | LSX | Franklin, Saint Charles, Saint Louis, Warren | 6 hr |
| May 20, 9:36 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis | 39 min |
| May 20, 9:39 PM CDT | Flash Flood Warning | LSX | Lincoln, Saint Charles | 6 hr |
| May 20, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 35 min |
| May 20, 10:38 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Jefferson, Sainte Genevieve, Saint Francois, Washington | 67 min |
| May 20, 11:13 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds | 62 min |
| May 20, 11:20 PM CDT | River Flood Warning | LSX | Saint Charles | 47 hr |
| May 20, 11:29 PM CDT | River Flood Warning | LSX | Saint Charles | 3 days |
| May 21, 12:33 AM CDT | River Flood Warning | LSX | Lincoln | 4 days |
| May 21, 6:35 AM CDT | River Flood Warning | LSX | Lincoln | 44 hr |
| May 21, 9:49 AM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 6 days |
| May 20, 7:27 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 48 min |
| May 20, 9:28 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 47 min |
| May 20, 10:17 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison, Montgomery | 43 min |
| May 20, 10:22 PM CDT | Flash Flood Warning | LSX | Jersey, Macoupin, Madison | 6 hr |
| May 20, 10:31 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Montgomery, Saint Clair | 59 min |
Nearby
Tornado Warnings in Missouri, 2013Tornado Warnings in Illinois, 2013Every tornado warning in 2013Tornadoes in 2013
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.