Severe Thunderstorm Warning 154, NWS Topeka, KS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TOPEKA KANSAS
330 AM CDT THU JUL 31 2003

PRECIP CHANCES AND TIMING OF WEAK FRONTS CONTINUES TO BE MAIN
FORECAST CONCERN.

MODELS ARE IN PRETTY GOOD AGREEMENT WITH THE OVERALL PATTERN.
FORECAST AREA SHOULD REMAIN UNDER THE INFLUENCE OF NORTHWEST FLOW
THROUGH THE WEEKEND AND INTO NEXT WEEK AS A CLOSED UPPER LOW REMAINS
OVER THE GREAT LAKES REGION AND RIDGING OVER THE SOUTHWEST. MODELS
ALL AGREE THAT THE BEST CHANCES FOR WIDE SPREAD PRECIP WILL BE
TONIGHT AS A WEEK FRONT/TROUGH SLOWS SLIDES SOUTH ACROSS THE AREA.
THERE ARE DIFFERENCES HOWEVER IN THE HANDLING OF THIS FEATURE...THE
GFS BEING THE SLOWER SOLUTION. THE ETA HAS HANDLED THE LAST COUPLE
WEAK FRONTS BETTER AND THINK IT PROBABLY IS DOING SO AGAIN. HAVE
COMPROMISED BETWEEN THE TWO BUT LEANED IN THE DIRECTION OF THE ETA
FOR MY FORECAST GRIDS. HAVE BUMPED UP POPS INTO THE 40-50% RANGE FOR
TONIGHT. AM STILL A LITTLE GUN SHY TO GO LIKELY POPS. THERE IS THE
POTENTIAL FOR SOME STORM TO BE SEVERE. LAPSE RATES SHOULD ONCE AGAIN
BE FAIRLY STEEP WITH LITTLE OR NO CAP. ALSO STRONGER MID AND UPPER
WINDS WILL PROVIDE BETTER SHEER. SEE SWODY1 FOR FURTHER DETAILS ON
SEVERE THREAT.

WITH THE WEAK TROUGH EXPECTED TO REMAIN ACROSS CENTRAL AND SOUTHERN
KS FOR FRIDAY...HAVE CONTINUED WITH THE CHANCE FOR PRECIP...MAKING
MINOR ADJUSTMENTS TO WHAT THE PREVIOUS SHIFT HAD. TEMPS FOR FRIDAY
COULD BE TRICKY DEPENDING ON CLOUD COVER AND PRECIP. HAVE THE COOLER
TEMPS ACROSS EAST CENTRAL KS WHERE THERE SHOULD BE MORE OF THESE TWO
THINGS.

THERE ARE SOME DIFFERENCES BETWEEN THE GFS AND ETA AFTER FRIDAY. THE
ETA WANTS TO BRING SOUTHERLY FLOW BACK FASTER THEN THE GFS. WITH
NORTHWEST FLOW AND SOME DRYER AIR MOVING IN...THINK THE ETA MAY BE A
BIT TO FAST. HAVE CONTINUED WITH A DRY FORECAST FOR SATURDAY
THINKING THE BEST BOUNDARY LAYER CONVERGENCE WILL BE TO OUR WEST AND
SOUTH AND FOLLOWED THE GFS HERE A LITTLE MORE CLOSELY.

HAVE ONLY MADE MINOR ADJUSTMENTS TO THE REMAINDER OF THE FORECAST.
THERE LOOKS TO BE LITTLE CHANGE IN THE LONGWAVE PATTERN.

THANKS FOR THE COORDINATION GID.

.TOP...NONE

WOLTERS

KSZ008>012-020>024-026-034>040-054>056-058-059-011000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
147 PM CDT THU JUL 31 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL...NORTHEAST AND
EAST CENTRAL KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE AREA THIS
AFTERNOON INTO THE EVENING HOURS.  LARGE HAIL AND DAMAGING WINDS
WILL BE THE MAIN THREAT.

THUNDERSTORM CHANCES MAY DIMINISH FOR A TIME THROUGH THE MID EVENING
HOURS BUT ACTIVITY IS EXPECTED TO INCREASE AGAIN TOWARD MIDNIGHT AND
THE OVERNIGHT HOURS.  SOME OF THESE THUNDERSTORMS COULD ALSO BE
SEVERE WITH LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS THE CONTINUED CHANCE FOR THUNDERSTORMS DURING THE DAY
FRIDAY. AS THE DAY PROGRESSES INTO THE EVENING...THE CHANCE FOR
THUNDERSTORMS SHOULD BE MAINLY ACROSS EAST CENTRAL KANSAS. SEVERE
WEATHER WILL AGAIN BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THE REST OF TODAY INTO TONIGHT.

&&

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB PAGE:
   HTTP://WWW.CRH.NOAA.GOV/TOP  (ALL LOWER CASE)

PF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
139 PM CDT THU JUL 31 2003

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0135 PM    5 N OVERBROOK             KS    .88 INCH HAIL
07/31/03   OSAGE