Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 297, NWS St. Louis, MO

June 11, 2011Lincoln County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 11, 2011, 12:22 AM CDT for Lincoln County, Missouri. It was in force for 17 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: Jun 11, 2011, 12:22 AM CDT (05:22 UTC)
Expired: Jun 11, 2011, 12:39 AM CDT
In force: 17 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lincoln County, MO

The radar

The St Louis radar (KLSX), 58 km from the middle of the area, began a volume at 05:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.4 hours before the alert went out and 231 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: 1004 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1475 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

550 
WUUS53 KLSX 110522
SVRLSX
MOC113-110600-
/O.NEW.KLSX.SV.W.0297.110611T0522Z-110611T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1222 AM CDT SAT JUN 11 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 100 AM CDT

* AT 1220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  SOUTHWEST OF EOLIA...OR 14 MILES NORTH OF TROY...AND MOVING EAST AT
  30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHITESIDE...ELSBERRY AND NEW HOPE.

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 3922 9110 3923 9072 3905 9071 3907 9113
      3923 9113
TIME...MOT...LOC 0522Z 271DEG 24KT 3916 9105
WIND...HAIL 60MPH 1.00IN

$$

BYRD

1 follow-up statement

025 
WWUS53 KLSX 110539
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1239 AM CDT SAT JUN 11 2011

MOC113-110550-
/O.CAN.KLSX.SV.W.0297.000000T0000Z-110611T0600Z/
LINCOLN MO-
1239 AM CDT SAT JUN 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LINCOLN COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 3922 9110 3923 9072 3905 9071 3907 9113
      3923 9113
TIME...MOT...LOC 0540Z 271DEG 24KT 3916 9090

$$

BYRD

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 Jun 11, 12:20 AM CDT, 2 minutes earlier.

Area forecast discussion, Jun 11, 12:20 AM CDT, 2 minutes before

AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE ST LOUIS MO
1220 AM CDT SAT JUN 11 2011

.UPDATE...
/859 PM CDT FRI JUN 10 2011/

SEVERE THUNDERSTORMS CONTINUE TO DEVELOP OVER CENTRAL MISSOURI
WITH A RECENT REPORT OF UP TO BASEBALL SIZE HAIL IN MONTGOMERY
COUNTY MISSOURI. AS MENTIONED PREVIOUSLY...MLCAPES STILL REMAIN
AROUND 2500 J/KG FROM JEF TO JUST SOUTH OF THE ST. LOUIS METRO
AREA. EFFECTIVE DEEP LAYER SHEAR CONTINUES INCREASE OVER CENTRAL
MISSOURI WHICH IS SUPPORTING STORM ROTATION AND PREVENTING THE
CLUSTER FROM BECOMING OUTFLOW DOMINATED. STRONG TO SEVERE
THUNDERSTORMS CONTINUE TO DEVELOP EVEN TO THE NORTHWEST OF KCOU UP
TO KUIN WHICH IS LIKELY OWING TO ADVECTION OF VERY STEEP MID LEVEL
LAPSE RATES IN ADDITION TO AFOREMENTIONED SHEAR. CONSEQUENTLY
EXPECT SEVERE THREAT TO CONTINUE IN THE SEVERE THUNDERSTORM WATCH
WELL INTO THE EVENING. IF THE AREA OF THUNDERSTORMS BEGINS TO MOVE
SOUTHEASTWARD...MAY BE ABLE TO CANCEL SOME OF THE COUNTIES IN
NORTHEAST MISSOURI IN THE NEXT HOUR OR SO.

HAVE INCREASED POPS THIS EVENING WHERE THUNDERSTORMS HAVE
INCREASED IN AREAL COVERAGE...AND EXPANDED LIKELY POPS OVERNIGHT
IN THE SOUTHEAST HALF OF THE CWA.

BRITT

&&

.DISCUSSION...
/250 PM CDT FRI JUN 10 2011/

MAIN CONCERN DEALS WITH THE POTENTIAL FOR SEVERE STORMS THIS
EVENING. LARGE CU FIELD WAS PRESENT OVER THE SERN HALF OF THE CWA
THIS AFTERNOON...WITH ADDITIONAL CU DEVELOPING OVER WEST CENTRAL
MISSOURI THE PAST HOUR. THUNDERSTORMS ARE CONTINUING TO DEVELOP
OVER SOUTH CENTRAL ILLINOIS WHERE SEVERE THUNDERSTORMS WATCH 457
IS...AND NEW STORMS ARE NOW SHOWING UP NEAR KVIH. SURFACE FRONT
EXTENDS ACROSS CENTRAL ILLINOIS INTO NORTHERN MISSOURI WITH A DECAYING
OUTFLOW BOUNDARY ON THE NORTH SIDE OF THE CU FIELD. LATEST SPC
MESOANAYLSIS IS SHOWING THAT THE CAP HAS BEEN BROKEN TO THE SOUTH
OF THE BOUNDARY WITH MLCAPES AROUND 2500 J/KG WITH SLIGHTLY LESS
INSTABILITY ALONG THE FRONT WITH A MINIMAL AMOUNT OF CINH. CURRENT
THINKING IS THAT THUNDERSTORMS WILL LIKELY INCREASE IN COVERAGE
THE REST OF THE AFTERNOON IN THE WARM SECTOR AS LARGE SCALE ASCENT
INCREASES AHEAD OF CENTRAL PLAINS SHORTWAVE TROUGH. THUNDERSTORMS WILL
ALSO LIKELY INITIATE CLOSER TO THE FRONT LATER THIS AFTERNOON INTO
THE EVENING. GIVEN THE LACK OF DEEP LAYER SHEAR...THINK THAT
CONVECTIVE MODE WILL BE PRIMARILY MULTI-CELLULAR WITH SOME LARGE
HAIL AND DAMAGING WINDS.

SEVERE WEATHER THREAT WILL DIMINISH OVERNIGHT AS FRONT GETS PUSHED
INTO THE SOUTHERN CWA AS SHORTWAVE MOVES ACROSS THE REGION. WILL
KEEP CHANCE OF STORMS OVER SOUTHEAST MISSOURI EARLY SATURDAY WHERE
FRONT WILL LINGER THE FIRST PART OF THE DAY. THEN FOLLOWED
PREVIOUS THINKING OF MAINLY DRY WEATHER FROM LATE SATURDAY INTO
EARLY SUNDAY BEFORE STRONG MOISTURE CONVERGENCE SETS UP OVER THE
WESTERN HALF OF THE CWA WHEN SURFACE FRONT MOVES BACK NORTHEAST
AS A WARM FRONT. BOTH THE NAM/GFS ARE SHOWING VERY SLOW MOVEMENT
OF THE FRONT ACROSS THE AREA EARLY NEXT WEEK...AND THERE IS THE
POTENTIAL FOR ONE OR TWO MCS'S TO ROLL SEWD OVER THE AREA...SO
HAVE MAINTAINED LIKELY POPS ON SUNDAY NIGHT INTO MONDAY.

THE FRONT WILL REMAIN IN CLOSE PROXIMITY TO THE CWA THROUGH THE
MIDDLE OF NEXT WEEK...SO MAINTAINED THE CHANCE OF RAIN THROUGH
WEDNESDAY NIGHT.

BRITT

&&

.AVIATION...
/1220 AM CDT SAT JUN 11 2011/

THUNDER CHCS WILL PERSIST UNTIL WITHIN AN HOUR OR TWO OF CD FROPA
LATE TONIGHT. LO CLOUDS SHOULD REACH KUIN LATER TONIGHT AND
CONTINUE THRU SATURDAY MORNING...BUT WILL STRUGGLE TO REACH KCOU
AND THE STL METRO AREA DUE TO BOTH GREATER DISTANCE TO TRAVEL AND
EXPECTED TIMING AFTER SUNRISE SATURDAY WHERE STRONG SUN THIS TIME
OF YEAR SHOULD QUICKLY PUT A HALT TO ANY SWD ADVANCE OR LIMIT ITS
IMPACT BY RAISING CIGS AND KEEPING THEM IN MVFR AT WORST. BY
SATURDAY AFTERNOON...SHOULD SEE CLOUD BASES IMPROVED TO VFR LEVELS
WITH LOSS OF LOWER CIGS AT MOST LOCATIONS BY MID AFTN. SFC WNDS
WILL VEER NWLY BY SATURDAY MORNING AND EVENTUALLY TO N BEFORE
DIMINISHING BY EVENING.

SPECIFICS FOR KSTL...INTERMITTENT THUNDER CHCS TO PERSIST THRU 11Z
WHEN FINAL ROUND WILL MOVE THRU. MAINTAINED MAIN HIGHLIGHTS OF
PREVIOUS FCST WITH NO WORSE THAN HI-END MVFR CIGS EXPECTED LATER
ON SATURDAY MORNING WITH IMPROVEMENT DURING THE AFTN.

TES

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
IL...NONE.
&&

WFO LSX

Hazardous weather outlook, Jun 10, 3:57 PM CDT, 8 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
357 PM CDT FRI JUN 10 2011

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-111115-
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-
357 PM CDT FRI JUN 10 2011

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

.DAY ONE...TONIGHT

THUNDERSTORMS ARE LIKELY OVER MUCH OF THE REGION TONIGHT. A FEW OF
THESE STORMS WILL BE SEVERE...CAPABLE OF PRODUCING LARGE HAIL AND
DAMAGING WIND GUSTS IN EXCESS OF 60 MPH.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS A CHANCE OF THUNDERSTORMS OVER SOUTHEAST MISSOURI ON
SATURDAY.

THERE IS ALSO A CHANCE OF THUNDERSTORMS OVER THE AREA FROM LATE
SUNDAY INTO WEDNESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ASKED TO REPORT ALL SEVERE WEATHER TO THE NATIONAL
WEATHER SERVICE IN ST. LOUIS.

BRITT

In the hours before

Local storm report, Jun 10, 11:42 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1142 PM CDT FRI JUN 10 2011

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

1135 PM     HEAVY RAIN       5 WNW BELLEVILLE        38.56N  90.09W
06/10/2011  M1.33 INCH       ST. CLAIR          IL   COCORAHS

            RAINFALL OVER THE PAST 50 MINUTES.

&&

GOSSELIN

Local storm report, Jun 10, 11:45 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1145 PM CDT FRI JUN 10 2011

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

1130 PM     TSTM WND DMG     GREENVILLE              38.89N  89.40W
06/10/2011                   BOND               IL   AMATEUR RADIO

            TREE BLOCKING HIGHWAY 140 ON NORTH SIDE OF TOWN.

&&

GOSSELIN

Local storm report, Jun 11, 12:03 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1203 AM CDT SAT JUN 11 2011

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

1121 PM     TSTM WND DMG     BEAVER CREEK            38.77N  89.39W
06/10/2011                   BOND               IL   AMATEUR RADIO

            ESTIMATED 60 MPH PLUS STRAIGHT LINE WINDS CAUSED A TREE
            TO BLOCK ILLINOIS 143 0.5 MILES WEST OF ILLINOIS 127.

&&

GOSSELIN

Special weather statement, Jun 11, 12:13 AM CDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1213 AM CDT SAT JUN 11 2011

ILZ098-MOZ036-052-110600-
CALHOUN IL-LINCOLN MO-PIKE MO-
1213 AM CDT SAT JUN 11 2011

...SIGNIFICANT WEATHER ADVISORY FOR CALHOUN COUNTY IN SOUTHWEST
ILLINOIS...AND NORTHERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...AND
SOUTHEASTERN PIKE COUNTY IN NORTHEAST MISSOURI UNTIL 100 AM CDT...

AT 1208 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 8 MILES EAST OF NEW HARTFORD...OR 13 MILES
SOUTH OF BOWLING GREEN...MOVING EAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  SILEX...
  WHITESIDE...
  ELSBERRY...
  EOLIA...
  HARDIN...
  EDGEWOOD...
  PAYNESVILLE...
  NEW HOPE...
  ANNADA...
  MOZIER...
  HAMBURG...
  MICHAEL...
  KAMPSVILLE...

BYRD

Local storm report, Jun 11, 12:14 AM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1214 AM CDT SAT JUN 11 2011

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

1046 PM     HEAVY RAIN       MASCOUTAH               38.51N  89.81W
06/10/2011  E1.00 INCH       ST. CLAIR          IL   TRAINED SPOTTER

            APPROXIMATELY ONE INCH OF RAIN IN 30 MINUTES.

&&

GOSSELIN

Local storm report, Jun 11, 12:17 AM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE ST LOUIS MO
1217 AM CDT SAT JUN 11 2011

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

1146 PM     HEAVY RAIN       MASCOUTAH               38.51N  89.81W
06/10/2011  E1.00 INCH       ST. CLAIR          IL   TRAINED SPOTTER

            APPROXIMATELY ONE INCH OF RAIN IN 30 MINUTES.

&&

CORRECTED EVENT TIME

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:23 PM CDT	Tornado Warning	LSX	Audrain, Monroe	30 min
Jun 10, 7:29 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Ralls	46 min
Jun 10, 7:32 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	43 min
Jun 10, 7:33 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	42 min
Jun 10, 7:42 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	48 min
Jun 10, 7:58 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Warren	47 min
Jun 10, 8:13 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	47 min
Jun 10, 8:16 PM CDT	Severe Thunderstorm Warning	LSX	Boone	27 min
Jun 10, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	35 min
Jun 10, 8:48 PM CDT	Tornado Warning	LSX	Audrain, Callaway	27 min
Jun 10, 8:54 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Gasconade	51 min
Jun 10, 8:57 PM CDT	Flash Flood Warning	LSX	Audrain	4 hr
Jun 10, 9:06 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery, Warren	39 min
Jun 10, 9:11 PM CDT	Severe Thunderstorm Warning	LSX	Marion	49 min
Jun 10, 9:23 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	52 min
Jun 10, 9:33 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	42 min
Jun 10, 9:47 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	43 min
Jun 10, 9:51 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	39 min
Jun 10, 9:53 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	52 min
Jun 10, 9:58 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis, City of Saint Louis	35 min
Jun 10, 10:07 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	39 min
Jun 10, 10:18 PM CDT	Areal Flood Advisory	LSX	Marion, Ralls	3 hr
Jun 10, 10:30 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	23 min
Jun 10, 10:44 PM CDT	Flash Flood Warning	LSX	Saint Louis, City of Saint Louis	2 hr
Jun 11, 9:48 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	11 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.