Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 221, NWS St. Louis, MO

May 25, 2011Jefferson County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 25, 2011, 4:34 PM CDT for Jefferson County, Missouri. It was in force for 26 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: May 25, 2011, 4:34 PM CDT (21:34 UTC)
Expired: May 25, 2011, 5:00 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 42 km from the middle of the area, began a volume at 21:34 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 25, 4:53 PM CDT	TSTM WND GST 60	3 Se Murphy, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 19 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 25, 11:09 AM CDT	Tornado Watch PDS	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 255 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1832 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 561 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

093 
WUUS53 KLSX 252134
SVRLSX
MOC099-252200-
/O.NEW.KLSX.SV.W.0221.110525T2134Z-110525T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
434 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 500 PM CDT

* AT 430 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR DE
  SOTO...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HILLSBORO...FESTUS...CRYSTAL CITY...CEDAR HILL...HERCULANEUM...
  PEVELY...ANTONIA...BARNHART...BYRNES MILL...HIGH RIDGE...ARNOLD...
  MURPHY...HOUSE SPRINGS...MORSE MILL...HEMATITE...MAPAVILLE...
  SCOTSDALE...OTTO...KIMMSWICK AND PARKDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3818 9073 3850 9059 3850 9041 3849 9040
      3848 9042 3845 9041 3846 9034 3843 9035
      3838 9034 3833 9037 3824 9036 3807 9050
TIME...MOT...LOC 2134Z 212DEG 33KT 3820 9055
WIND...HAIL 60MPH 1.75IN

$$

BRITT

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at May 25, 12:51 PM CDT, 3 hours 43 minutes earlier.

Area forecast discussion, May 25, 12:51 PM CDT, 3 hours 43 minutes before

AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE ST LOUIS MO
1251 PM CDT WED MAY 25 2011

.DISCUSSION...
/1144 AM CDT WED MAY 25 2011/
WRITING THE AFD EARLY TODAY...MAY NOT GET ANOTHER CHANCE LATER IN
THE AFTERNOON DUE TO SEVERE WEATHER. LOW OVER EASTERN KANSAS WILL
CONTINUE TO PROGRESS EASTWARD TODAY AND SHOULD BE NEAR THE
MISSISSIPPI RIVER JUST NORTH OF THE ST LOUIS METRO AREA BETWEEN
00Z AND 03Z THIS EVENING. DRY LINE IS MOVING THROUGH WESTERN
MISSOURI NOW...AND HAS ALREADY GONE THROUGH JOPLIN. WITH STORMS
ALREADY FIRING ALONG AND EVEN AHEAD OF THE DRYLINE...SPC HAS
EXPANDED THE HIGH RISK AREA BACK INTO THE ST LOUIS METRO
AREA...AND IT NOW ENCOMPASSES MUCH OF THE SOUTHEASTERN 1/3 OF THE
CWFA. MODERATE RISK NOW STRETCHES FROM COLUMBIA UP TO JUST
SOUTHEAST OF QUINCY WITH SLIGHT BEHIND THAT.  THE OVERALL ENVIRONMENT IS VERY
CONDUCIVE FOR SEVERE WEATHER. SPC OBJECTIVE ANALYSIS IS ALREADY
SHOWING MLCAPE IN EXCESS OF 2000 J/KG AND THE RUC IS FORECASTING
THIS AMOUNT T INCREASE TO OVER 3000 J/KG BY LATER THIS AFTERNOON.
DEEP LAYER 0-6KM BULK SHEAR IS IN EXCESS OF 40KTS AS WELL...SO
SUPERCELLS WITH ROTATING UPDRAFTS ARE LIKELY. ADDITIONALLY...SURFACE
OBS AND RADAR ARE SHOWING AN OUTFLOW BOUNDARY LYING ALMOST
DIRECTLY ON THE I-44 CORRIDOR THROUGH THE METRO AREA...AND
EXTENDING NORTHEAST INTO ILLINOIS NEAR THE I-70 CORRIDOR. THIS
COULD ADD ADDITIONAL LOW LEVEL VORTICITY TO THE ENVIRONMENT AND
ENHANCE THE TORNADO THREAT. LONG TRACK AND VIOLENT TORNADOES...AS
WELL AS LARGE HAIL IN EXCESS OF 2 INCHES AND DAMAGING WINDS OVER
70 MPH ARE LIKELY.

SEVERE WEATHER THREAT SHOULD DIMINISH GREATLY AFTER THE DRYLINE
MOVES THROUGH THIS EVENING. THURSDAY LOOKS LIKE A COOL/RAINY RAW
MAY DAY. LOOKS LIKE A BRIEF BREAK IN THE WEATHER ON THURSDAY NIGHT
AND MOST OF FRIDAY BEFORE ANOTHER SHORTWAVE RIPPLES ACROSS THE
AREA SPREADING SHOWERS AND STORMS ACROSS THE REGION FOR FRIDAY
NIGHT AND EARLY SATURDAY. THE ASSOCIATED COLD FRONT WILL BARELY
CLEAR MISSOURI BEFORE STARTING BACK NORTH AS A WARM FRONT ON
SATURDAY. ADDITIONAL WET WEATHER IS POSSIBLE AS THE FRONT LIFTS
NORTHWARD SATURDAY AFTERNOON AND EVENING. GUIDANCE TEMPS HAVE COME
IN A LITTLE COOLER THAN THE GOING FORECAST...SO WILL GO SLIGHTLY
COOLER THAN THE GOING FORECAST FOR THURSDAY AND FRIDAY. TEMPS TO
WARM BACK UP FOR THE WEEKEND.

THE GOING EXTENDED FORECAST LOOKS GOOD WITH AN UPPER RIDGE
BUILDING OVERHEAD. SHOULD STAY WARM AND MOSTLY DRY AT LEAST
THROUGH MONDAY NIGHT. GFS HAS A WEAK COLD FRONT DRIFTING INTO THE
AREA ON TUESDAY WHICH COULD PROVIDE A FOCUS FOR
THUNDERSTORMS...BUT WILL KEEP THE FORECAST DRY FOR NOW SINCE THE
PREVIOUS RUNS WERE DRY. WOULD LIKE TO SEE A LITTLE MORE
CONSISTENCY BEFORE ADDING POPS.

CARNEY

&&

.AVIATION...
/1247 PM CDT WED MAY 25 2011/

STRONG TO SEVERE STORMS WILL TRACK ACROSS KCOU...KSUS...AND KSTL
THIS AFTERNOON. KUIN MAY BE NORTH OF STRONGEST CELLS. SEE TAFS FOR
TIMING SPECIFICS.

SPECIFICS FOR KSTL...EXPECT STRONG TO SEVERE THUNDERSTORMS TO
IMPACT KSTL FROM 22Z TO 24Z. BREAK IN PRECIP WILL FOLLOW...THEN
GRADUALLY FALLING CIGS AND LIGHT RAIN BY 15Z.

BROWNING

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR AUDRAIN MO-BOONE MO-
     CALLAWAY MO-COLE MO-CRAWFORD MO-FRANKLIN MO-GASCONADE MO-
     IRON MO-JEFFERSON MO-KNOX MO-LEWIS MO-LINCOLN MO-MADISON MO-
     MARION MO-MONITEAU MO-MONROE MO-MONTGOMERY MO-OSAGE MO-PIKE
     MO-RALLS MO-REYNOLDS MO-SHELBY MO-ST. CHARLES MO-ST.
     FRANCOIS MO-ST. LOUIS CITY MO-ST. LOUIS MO-STE. GENEVIEVE
     MO-WARREN MO-WASHINGTON MO.

IL...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR ADAMS IL-BOND IL-
     BROWN IL-CALHOUN IL-CLINTON IL-FAYETTE IL-GREENE IL-JERSEY
     IL-MACOUPIN IL-MADISON IL-MARION IL-MONROE IL-MONTGOMERY IL-
     PIKE IL-RANDOLPH IL-ST. CLAIR IL-WASHINGTON IL.

&&

WFO LSX

Hazardous weather outlook, May 25, 4:09 PM CDT, 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
409 PM CDT WED MAY 25 2011

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-261130-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO-
LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO-
AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-
LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
409 PM CDT WED MAY 25 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TONIGHT

A SIGNIFICANT OUTBREAK OF SEVERE THUNDERSTORMS UNDERWAY OVER THE
AREA. A FEW STRONG TO VIOLENT LONG TRACK TORNADOES...HAIL LARGER
THAN GOLF BALLS AND DAMAGING WIND GUSTS CAN BE EXPECTED WITH THE
MOST INTENSE THUNDERSTORMS. THESE STORMS WILL ALSO BE CAPABLE OF
PRODUCING VERY HEAVY RAINFALL ON INCREASINGLY SATURATED SOIL. THE
FLASH FLOOD WATCH WILL REMAIN IN EFFECT THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS ALSO A CHANCE OF THUNDERSTORMS OVER THE REGION THURSDAY
AND AGAIN FRIDAY AND FRIDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NECESSARY THROUGH THIS EVENING.
SPOTTERS ARE ENCOURAGED TO REPORT ANY SEVERE WEATHER...HEAVY
RAINFALL OR FLOODING TO THE NATIONAL WEATHER SERVICE.

CARNEY

In the hours before

Local storm report, May 25, 4:27 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
427 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0425 PM     TSTM WND DMG     8 NE LESTERVILLE        37.54N  90.72W
05/25/2011                   IRON               MO   LAW ENFORCEMENT

            TREES DOWN BETWEEN JOHNSON SHUT-INS AND IRONTON.

&&

FUCHS

Local storm report, May 25, 4:29 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
429 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0427 PM     FUNNEL CLOUD     DE SOTO                 38.14N  90.56W
05/25/2011                   JEFFERSON          MO   TRAINED SPOTTER

&&

CARNEY

Local storm report, May 25, 4:30 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
430 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0429 PM     HAIL             AFFTON                  38.55N  90.33W
05/25/2011  E2.75 INCH       ST. LOUIS          MO   TRAINED SPOTTER

            FUNNEL CLOUD ALSO OBSERVED TO THE EAST

&&

MILLER

Local storm report, May 25, 4:31 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
431 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 PM     HAIL             ST. LOUIS               38.64N  90.24W
05/25/2011  E1.00 INCH       ST. LOUIS CITY     MO   TRAINED SPOTTER

            NEAR SW AVENUE AND HAMPTON

&&

MILLER

Local storm report, May 25, 4:32 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
432 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0422 PM     WALL CLOUD       5 N EUREKA              38.58N  90.64W
05/25/2011                   ST. LOUIS          MO   TRAINED SPOTTER

&&

CARNEY

Local storm report, May 25, 4:33 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
433 PM CDT WED MAY 25 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0432 PM     HAIL             ST. LOUIS               38.64N  90.24W
05/25/2011  E2.50 INCH       ST. LOUIS CITY     MO   AMATEUR RADIO

            AT THE INTERSECTION OF I-44 AND GRAND BLVD.

&&

FUCHS

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 1:32 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	43 min
May 25, 1:35 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	40 min
May 25, 2:00 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Marion, Pike, Ralls	45 min
May 25, 2:16 AM CDT	Areal Flood Advisory	LSX	Boone, Cole, Moniteau	6 hr
May 25, 3:09 AM CDT	Areal Flood Advisory	LSX	Audrain, Knox, Lewis, Marion, Monroe, Ralls and 1 more	5 hr
May 25, 3:55 AM CDT	Flash Flood Warning	LSX	Lewis, Marion, Shelby	6 hr
May 25, 4:15 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Lincoln, Saint Charles, Saint Louis, Warren	35 min
May 25, 4:39 AM CDT	Tornado Warning	LSX	Lincoln	22 min
May 25, 5:08 AM CDT	River Flood Warning	LSX	Lewis	3 days
May 25, 7:47 AM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Cole, Knox, Lewis, Marion and 5 more	3 hr
May 25, 7:56 AM CDT	River Flood Warning	LSX	Marion	12 hr
May 25, 9:06 AM CDT	River Flood Warning	LSX	Marion	11 hr
May 25, 11:03 AM CDT	River Flood Warning	LSX	Callaway, Cole	5 days
May 25, 11:03 AM CDT	River Flood Warning	LSX	Franklin, Warren	6 days
May 25, 11:03 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	20 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Lewis	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Marion	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Marion	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Marion	40 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Ralls	15 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Pike	40 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Pike	46 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Lincoln	43 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Saint Louis, City of Saint Louis	46 days
May 25, 1:00 PM CDT	Tornado Warning	LSX	Cole, Moniteau	60 min
May 25, 1:36 PM CDT	Flash Flood Warning	LSX	Moniteau	5 hr
May 25, 1:36 PM CDT	Tornado Warning	LSX	Cole	39 min
May 25, 1:48 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	42 min
May 25, 1:54 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Warren	51 min
May 25, 1:55 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	50 min
May 25, 2:02 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Marion, Monroe, Ralls, Shelby	43 min
May 25, 2:05 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike	40 min
May 25, 2:07 PM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Pike, Warren	53 min
May 25, 2:11 PM CDT	Tornado Warning	LSX	Audrain, Marion, Monroe, Ralls, Shelby	49 min
May 25, 2:14 PM CDT	Flash Flood Warning	LSX	Cole	5 hr
May 25, 2:15 PM CDT	Tornado Warning	LSX	Callaway, Cole, Osage	45 min
May 25, 2:22 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Gasconade	53 min
May 25, 2:29 PM CDT	Tornado Warning	LSX	Crawford	61 min
May 25, 2:36 PM CDT	Flash Flood Warning	LSX	Audrain, Boone	6 hr
May 25, 2:42 PM CDT	Tornado Warning	LSX	Audrain, Montgomery, Pike	48 min
May 25, 2:43 PM CDT	Tornado Warning	LSX	Jefferson, Saint Francois, Washington	18 min
May 25, 2:44 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Osage	46 min
May 25, 2:49 PM CDT	Tornado Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	32 min
May 25, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	39 min
May 25, 2:54 PM CDT	Tornado Warning	LSX	Marion, Monroe, Pike, Ralls	51 min
May 25, 2:55 PM CDT	Tornado Warning	LSX	Lincoln, Pike	50 min
May 25, 3:05 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Lincoln, Montgomery, Warren	40 min
May 25, 3:05 PM CDT	Tornado Warning	LSX	Iron, Reynolds	40 min
May 25, 3:08 PM CDT	Flash Flood Warning	LSX	Monroe	6 hr
May 25, 3:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	36 min
May 25, 3:16 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	44 min
May 25, 3:19 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Jefferson, Washington	41 min
May 25, 3:23 PM CDT	Flash Flood Warning	LSX	Lincoln, Montgomery, Pike	6 hr
May 25, 3:29 PM CDT	Tornado Warning	LSX	Lincoln	46 min
May 25, 3:30 PM CDT	Tornado Warning	LSX	Jefferson	33 min
May 25, 3:32 PM CDT	Tornado Warning	LSX	Iron, Reynolds, Washington	43 min
May 25, 3:34 PM CDT	Tornado Warning	LSX	Pike, Ralls	41 min
May 25, 3:37 PM CDT	Tornado Warning	LSX	Lewis, Marion	25 min
May 25, 3:38 PM CDT	Flash Flood Warning	LSX	Ralls	6 hr
May 25, 3:41 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	38 min
May 25, 3:41 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds, Saint Francois, Washington	37 min
May 25, 3:42 PM CDT	Flash Flood Warning	LSX	Lewis, Marion	6 hr
May 25, 3:43 PM CDT	Tornado Warning	LSX	Pike	47 min
May 25, 3:48 PM CDT	Areal Flood Advisory	LSX	Callaway	6 hr
May 25, 3:59 PM CDT	Tornado Warning	LSX	Iron, Madison	46 min
May 25, 4:00 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	45 min
May 25, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	40 min
May 25, 4:11 PM CDT	Tornado Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	49 min
May 25, 4:14 PM CDT	Tornado Warning	LSX	Iron, Jefferson, Saint Francois, Washington	46 min
May 25, 4:23 PM CDT	Tornado Warning	LSX	Jefferson, Sainte Genevieve	52 min
May 25, 4:30 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	45 min
May 25, 4:40 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	21 min
May 25, 4:45 PM CDT	Tornado Warning	LSX	Madison	45 min
May 25, 4:51 PM CDT	Tornado Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	39 min
May 25, 5:00 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	25 min
May 25, 5:03 PM CDT	Flash Flood Warning	LSX	Saint Louis, City of Saint Louis	4 hr
May 25, 5:12 PM CDT	Tornado Warning	LSX	Sainte Genevieve	48 min
May 25, 5:17 PM CDT	Tornado Warning	LSX	Madison, Sainte Genevieve, Saint Francois	43 min
May 25, 5:23 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	52 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every 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.