Severe Thunderstorm Warning 271, NWS Wichita, KS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WICHITA KS
342 PM CDT THU AUG 21 2003

FCST CONCERNS...
CNVTV TRENDS THIS EVE, THEN TEMP COOLING BEHIND FROPA ON FRI...

CNVGNC ALG SFC FNT ALREADY MANIFESTING HIGH BASED CU FM HUT-EWK-EMP
LN. MESO ANLYS SUGGESTS LTL RMNG CAP AND ABT 2500-3000J/KG OF MEAN
LYR CAPE JUST NE OF ICT. XPCT TO SEE ISOLD/WDLY SCT CNVTN DVLP TWD
21Z, WITH SWD DRIFT OF CELLS TWD HWY 54 TO THE E OF ICT THIS EVE.
ATMOS STILL ONE OF WK SHEAR AND MDT INSTBY, SO MAIN THREAT WL BE LCL
DOWN-BURST WNDS AND ISOLD HVY RAFL WITH SLOW MOVMT/PROPAGATION. LACK
OF SGFNT FORCING SUGGESTS STMS WL DMNSH RAPIDLY ARND SUNSET, HOWEVER
THERE MAY BE ENUF CNVGNC ALG BNDRY TO WARRANT SLGT POPS MAINLY E OF
ICT OVRNGT.

THE AMOUNT OF COOLING BEHIND FROPA IS OF CONCERN ON FRI. TEMPS THIS
AFTN ACRS NEB/SD ABT 15 TO 20 DEGREES LWR THAN YDA. THE AIR IS ALSO
MUCH DRIER WITH DWPTS IN THE UPR 40S AND 50S. TO THIS END, THE ETA
MAY BE TOO WARM WITH LO LVL THKNS/MAX TEMPS ON FRI, ESPCLY ACRS THE
SRN CWA. CONSENSUS SUGGESTS FNT WL BE JUST S OF THE OKLA BORDER BY
MRNG, WITH RELATIVELY SHALLOW NELY FLO ACRS THE CWA. EVEN SO, THE
SUN WL TEND TO MODIFY THE DRY AIRMASS A BIT, SO THE COOLDOWN SHOULD
BE TEMPERED SOMEWHAT ACRS THE CWA. THE GOING FCST LOOKS BETTER THAN
ARRAY OF MOS VALUES, SO WL STAY THE COURSE. CNVTV CHCS ACRS THE SRN
CWA WL HINGE ON FNTL MOVMT/PSN IN THE AFTN. STILL XPCT A RIBBON OF
INSTBY ALG/JUST N OF FNT, PERHAPS ACRS THE SRN ROW OF COUNTIES. SO
WL CONT SLGT POPS THERE IN THE AFTN.

THE ETA IS QUITE OMINOUS WITH THE BLDG UPR RDG AGAIN ACRS THE CNTRL
PLAINS/KS RGN BY THE END OF THE WEEKEND. IT MAY HAVE THE RIGHT IDEA,
BUT IS PROBLY A BIT TOO WARM (SLGT BIAS) WITH ITS THERMAL PROFILE.
OTHERWISE, THE CENTURY MARK READINGS LOOK TO RETURN FOR SUNDAY AND
MON ACRS CNTRL KS.

A LOT OF QUESTIONS IN THE EXTENDED FCST, MAINLY ON HOW STEADFAST THE
RDG WL BE, WHETHER IT WL ALLOW INCRSG WLYS ACRS THE NRN TIER TO
SUBJECT THE CNTRL PLAINS WITH ANOTHER FROPA AND SOMEWHAT COOLER AIR
NEXT WEEK. FOR NOW PERSISTENCE HAS HAD A BETTER TRACK RECORD THAN ANY
MODEL SOLN, AND UNTIL SIGNALS BCM CLR FOR A FEW RUNS, THE CONSENSUS
IS TO STAY THE COURSE WITH THE HOT AND MAINLY DRY FCST. CANNOT RULE
OUT ISOLD CNVTN, AS HAS BEEN THE CASE OF LATE, BUT CHCS SML ENUF TO
LEAVE OUT OF FCST FOR NOW. ANY COOLING BHND FROPA/TROF PASSAGE BY TUE
LOOKS TO BE MINIMAL. TEMPS STILL AVG ABV CLIMO THRUT EXTENDED PD.

FCSTID = 13/DARMOFAL
ICT   73  99  70  98 /  20   5   5   5
HUT   71  97  69  97 /  20   5   5   5
EWK   72  97  69  97 /  20   5   5   5
EQA   72  98  70  97 /  30   5   5   5
WLD   74 100  70  97 /  20  20  10   5
RSL   67  93  66  96 /  10   5   5   5
GBD   69  95  67  97 /  10   5   5   5
SLN   70  96  68  98 /  10   5   5   5
MPR   70  96  69  97 /  20   5   5   5
CFV   72  99  69  95 /  20  20  10   5
CNU   70  97  68  95 /  30  10   5   5
K88   70  97  68  95 /  30  10   5   5

.ICT...NONE.

KSZ032-033-047>053-067>072-082-083-091>096-098>100-221200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WICHITA KS
1155 AM CDT THU AUG 21 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND SOUTHEAST KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

EXTREME HEAT INDEX VALUES IN THE 105 TO 110 DEGREE RANGE ARE EXPECTED
THROUGH THE AFTERNOON ACROSS SOUTHEAST KANSAS...WITH VALUES AROUND
105 IN SOUTH CENTRAL KANSAS.

A WEAK COOL FRONT WILL MOVE SOUTHWARD OVER CENTRAL KANSAS THIS
AFTERNOON.  ISOLATED THUNDERSTORMS MAY DEVELOP IN THE HOT AIRMASS
ALONG AND SOUTH OF THE FRONT AFTER 2 PM.  ANY THUNDERSTORM THAT
DEVELOPS WILL BE CAPABLE OF PRODUCING STRONG WINDS.  THE POTENTIAL
FOR THUNDERSTORMS WILL DIMINISH BY MID EVENING WITH THE LOSS OF
HEATING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS OVER EXTREME SOUTHERN
KANSAS FRIDAY AFTERNOON.  AT THIS TIME NO WIDESPREAD SEVERE WEATHER
IS ANTICIPATED.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON FOR
LOCATIONS ALONG AND EAST OF THE KANSAS TURNPIKE.

&&

FOR A GRAPHICAL VERSION OF THIS INFORMATION, SEE OUR
WEBPAGE AT (LOWERCASE) HTTP://WWW.CRH.NOAA.GOV/ICT/HWO/HWOICT.HTM

LAWSON/WOLF