Severe Thunderstorm Warning 487, NWS St. Louis, MO

000 
WWUS53 KLSX 141950
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
250 PM CDT MON AUG 14 2006

MOC186-142015-
/O.CON.KLSX.SV.W.0487.000000T0000Z-060814T2015Z/
STE. GENEVIEVE MO-
250 PM CDT MON AUG 14 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR SOUTHERN STE. GENEVIEVE COUNTY...

AT 249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR COFFMAN...OR ABOUT 14 MILES WEST OF PERRYVILLE...MOVING
EAST AT 20 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
MINNITH AND ST. MARY.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 3778 9034 3768 9014 3787 8993 3795 8996

$$

CARNEY

000 
WWUS53 KLSX 142007
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
306 PM CDT MON AUG 14 2006

MOC186-142016-
/O.EXP.KLSX.SV.W.0487.000000T0000Z-060814T2015Z/
STE. GENEVIEVE MO-
306 PM CDT MON AUG 14 2006

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN STE. GENEVIEVE 
COUNTY WILL BE ALLOWED TO EXPIRE AT 315 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER 
APPEARED TO BE SEVERE. HOWEVER GUSTY WINDS...SMALL HAIL AND FREQUENT 
DEADLY LIGHTNING WILL CONTINUE TO BE POSSIBLE WITH THIS STORM.

LAT...LON 3778 9034 3768 9014 3787 8993 3795 8996

$$

CARNEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
100 PM CDT MON AUG 14 2006

.UPDATE...
HAVE UPDATED PUBLIC GRIDDED FORECAST FOR THIS AFTERNOON. MAIN
TEMPERATURE ADJUSTMENT WAS TO RAISE THEM FOR THE SERN HALF OF THE
FA...WHERE WIDESPREAD AROUND 90F EXPECTED...AND COUPLED WITH
DEW POINTS IN LOWER 70S...WILL PUSH HEAT INDICES CLOSE TO 100F IN
MANY SPOTS THERE. FURTHER N IN THICKER CLOUD BAND...TEMPS WILL
STRUGGLE TO CLIMB AND ONLY MADE MINOR TWEEKS THERE.

ALSO ADJUSTED PCPN CHANCES AND CLOUD FORECAST. SEE AVIATION
DISCUSSION BELOW FOR FURTHER DETAILS.

TES

&&

.DISCUSSION...
COLD FRONT BEGINNING TO MAKE ITS WAY INTO CWA EARLY THIS MORNING. AS
OF 07Z...FRONT EXTENDED FROM NWRN IL THRU NERN MO AND INTO CNTRL OK.
RWS AND TRWS HAVE DEVELOPED ALONG AND AHEAD OF BOUNDARY...MAINLY
AFFECTING NWRN HALF OF CWA.

FOR TODAY...RWS AND TRWS TO DIMINISH AS THE MORNING PROGRESSES...
THEN PICK UP AGAIN BY AFTERNOON. AS FOR PLACEMENT OF PCPN...IT WILL
DEPEND ON WHERE THE FRONT IS. BEST CHANCES IN THE MORNING...WILL OF
COURSE BE NORTH OF I-70...WHILE IN THE AFTERNOON IT WILL BE SOUTH OF
I-70. ST. LOUIS IS STUCK IN THE MIDDLE AGAIN AND COULD RECEIVE
LITTLE OR NO PCPN WITH THIS SYSTEM. WILL HAVE TO WAIT AND SEE. AS
FOR TEMPS...IT WILL DEPEND ON FRONTAL POSITION...CLOUD COVER AND
PCPN. HAVE LOW 80S NORTH TO UPPER 80S IN THE SOUTH.

BY TONIGHT...COLD FRONT TO MOVE OUT OF CWA...BRINGING PCPN CHANCES
TO AN END. STRONG NORTHERLY FLOW AND DRIER DEWPTS MOVING INTO THE
REGION WILL ALLOW TEMPS TO FALL INTO THE UPPER 50S TO LOWER 60S AS
RIDGE BUILDS IN.

DRY AND COOLER WEATHER TO PERSIST THROUGH WEDNESDAY AS LIGHT NE TO E
FLOW PERSISTS ACROSS REGION...BEFORE TEMPS WARM UP TOWARDS THE END
OF THE WORK WEEK AND INTO NEXT WEEKEND.

BYRD

&&

.AVIATION...
FOR THE 18Z TAFS...CDFNT HAS VIRTUALLY CLEARED THE ENTIRE FA NOW
PUSHING THE MAIN THUNDER THREAT SE WITH IT. HOWEVER...ANOTHER TROF
IS SLIDING SE BEHIND THE CDFNT...AND THIS IS MOVING INTO AN AREA
WITH WEAK CINH AND MAY BE ABLE TO GENERATE ENOUGH LO LEVEL
CONVERGENCE COUPLED WITH WEAKENING VORT MAX TO CREATE THREAT FOR SCT
SHRA/ISOLD TSRA THRU THE EARLY EVENING HOURS. PCPN THREAT TO THEN
RAPIDLY DIMINISH EARLY THIS EVENING.

BAND OF LOWER CLOUDS WILL SLOWLY SLIDE SE THRU THE FA TODAY...BUT
THE SUN WILL TAKE ITS TOLL...WEARING IT DOWN TO WHERE NOT MUCH MAY
MAKE IT INTO THE SRN FA...AND KSTL/KSUS TERMINALS SHOULD LARGELY AVOID
MUCH IN THE WAY OF CLOUDS BELOW 3KFT. ALL TAF SITES EXPECTED TO
CLEAR OUT BY 01/02Z AND TO REMAIN CLEAR/MOSTLY CLEAR FOR THE
REMAINDER OF THE VALID TAF PERIOD.

WITH MIN TEMPS IN THE LOWER 60S EXPECTED...AND MO RIVER TEMPS IN
THE LOW-MID 80S...SHOULD SEE HEIGHTENED CHANCE FOR RIVER/STEAM FOG
LATE TONIGHT...NOTABLY FOR THE KSUS TERMINAL. SYNOPTIC WINDS
AREN/T PERFECT...BUT NOT BAD EITHER...AND HAVE PLACED IN IFR BCFG
INTO THE TAF FORECAST.

OTHERWISE...LOOK FOR NW-N SFC WINDS TO DIMINISH TO 5KTS OR LESS
THIS EVENING WITH ONLY A SLIGHT RECOVERY EXPECTED UNDER A MODEST
CU FIELD ON TUESDAY.

TES

&&

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

WFO LSX

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
1245 PM CDT MON AUG 14 2006

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-151200-
ADAMS IL-AUDRAIN-BOND IL-BOONE-BROWN IL-CALHOUN IL-CALLAWAY-
CLINTON IL-COLE-CRAWFORD-FAYETTE IL-FRANKLIN-GASCONADE-GREENE IL-
IRON-JEFFERSON-JERSEY IL-KNOX-LEWIS-LINCOLN-MACOUPIN IL-MADISON-
MADISON IL-MARION-MARION IL-MONITEAU-MONROE-MONROE IL-MONTGOMERY-
MONTGOMERY IL-OSAGE-PIKE-PIKE IL-RALLS-RANDOLPH IL-REYNOLDS-
SHELBY-ST. CHARLES-ST. CLAIR IL-ST. FRANCOIS-ST. LOUIS-
ST. LOUIS CITY-STE. GENEVIEVE-WARREN-WASHINGTON-WASHINGTON IL-
1245 PM CDT MON AUG 14 2006

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE FOR THUNDERSTORMS THROUGH EARLY THIS EVENING...MAINLY
SOUTH AND EAST OF METROPOLITAN ST LOUIS. A FEW OF THESE STORMS MAY
PRODUCE GUSTY WINDS AND SMALL HAIL. HOWEVER...NO SEVERE WEATHER
IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE FOR THUNDERSTORMS ON FRIDAY NIGHT AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

TES