Flash Flood in Missouri, June 6, 2005

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
400 AM CDT MON JUN 6 2005

.DISCUSSION...

CLOSED UPPER LOW JUST OFF THE PACIFIC NORTHWEST COAST WITH DEEP
UPPER TROUGH COVERING WESTERN THIRD OF NATION WILL ALLOW UPPER RIDGE
NOW OVER THE HIGH PLAINS TO BUILD EAST INTO THE CENTRAL PLAINS THIS
WEEK. THIS WILL ALLOW THE HOT AND MUGGIES TO PAY A VISIT TO THE
FORECAST AREA WITH TEMPERATURES CLIMBING ABOVE CLIMO. THIS SHOULD
LAST THROUGH MID WEEK AND POSSIBLY FOR THE ENTIRE WORK WEEK.

WHAT STARTED OUT AS A BENIGN WEATHER DAY HAS BEEN TURNED INTO ONE OF
INTRIGUE. A BAND OF THUNDERSTORMS FORMED OVER NORTHERN OK/SOUTHEAST
KS DURING THE PRE-DAWN HOURS IN A REGION OF 850MB MOISTURE
CONVERGENCE/THETA-E AXIS. NEW CONVECTION HAS SINCE FORMED JUST SOUTH
OF THE CWA. ACTIVITY HAS BEEN TRACKING EAST-NORTHEAST. NGM/RUC QPF
HAVE THE BEST HANDLE ON THIS ACTIVITY AND THERE IS A CHANCE IT MAY
GRAZE THE FAR SOUTHERN COUNTIES THIS MORNING. THE CONVECTION COULD
WEAKEN BY LATE MORNING BUT THEN RE-FIRE DURING PEAK HEATING. DAY
SHIFT WILL NEED TO KEEP AN EYE ON THIS AS THE 850MB THETA-E AXIS IS
PROGGED TO SHIFT NORTH AND INTO THE SOUTHERN AND WEST CENTRAL CWA BY
LATE AFTERNOON...AND LINGER INTO THE EVENING. THE NGM FOLLOWS THIS
IDEA AND HAS EASTERN KS/WESTERN MO PAINTED WITH QPF. SOUTHERLY WINDS
WILL ADVECT 70ISH DEWPOINTS INTO CWA THIS AFTERNOON AND ONCE HERE
THEY ARE NOT GOING ANYWHERE.

00Z NAM AND GFS BOTH SUFFERED FROM CONVECTIVE FEEDBACK ISSUES OVER
KS AND NEBRASKA TONIGHT BUT 06Z HAS LOST MOST OF THAT PROBLEM. NEXT
CHANCE OF SIGNIFICANT RAIN IS WEDNESDAY AS A COLD FRONT DROPS
SOUTHEAST INTO THE AREA. BUT WITH A SOUTHWEST FLOW OVER THE CENTRAL
U.S. THE MODELS MAY SLOW DOWN ITS ARRIVAL IN FUTURE RUNS.

NOTHING CHANGED IN THE FORECAST FOR THE END OF THE WORK WEEK AND
WEEKEND. POTENTIAL IS THERE FOR SEVERE WEATHER OUTBREAK AS STRONG
UPPER TROUGH EJECTS OUT OF THE SOUTHWEST.

MJ

&&

.PREV DISCUSSION...
235 PM...
LONGWAVE TROUGH ENCOMPASSING MUCH OF WESTERN/CENTRAL CONUS EVIDENT
IN EARLY AFTERNOON WATER VAPOR IMAGERY AND OBJECTIVE UPPER AIR
ANALYSIS. INITIAL SHORTWAVE TROUGH WHICH AFFECTED FORECAST AREA
SATURDAY INTO SATURDAY NIGHT IS CURRENTLY LIFTING INTO UPPER MS
VALLEY...WHILE FURTHER UPSTREAM VIGOROUS SHORTWAVE TROUGH/CLOSED LOW
LOCATED OVER PACIFIC NORTHWEST. SHORTWAVE RIDGE BETWEEN THESE TWO
FEATURES IS PRESENTLY CENTERED OVER THE CENTRAL ROCKIES...AND IS
EXPECTED TO BUILD EASTWARD ACROSS THE REGION THROUGH TUESDAY.

FAIRLY TRANQUIL CONDITIONS EXPECTED ACROSS THE FORECAST AREA THROUGH
TUESDAY NIGHT. GIVEN SATURATED GROUND CONDITIONS FROM RECENT
RAINFALL CANT RULE OUT PATCHY FOG DEVELOPING
OVERNIGHT...PARTICULARLY IN LOW LYING AREAS...AND HAVE INCLUDED THIS
IN GRIDS/ZONES. OTHERWISE AS MID LEVEL RIDGE BUILDS EASTWARD EXPECT
TEMPS TO WARM ABOVE CLIMO THROUGH MIDWEEK. HAVE GENERALLY TRENDED
CLOSE TO MET/MAV GUIDANCE.

PACIFIC NORTHWEST CLOSED LOW PROGGED TO DEEPEN ACROSS WESTERN CONUS
THROUGH MID-WEEK. SHORTWAVE TROUGH PROGGED BY MODELS TO EJECT ACROSS
NORTHERN PLAINS PUSHING SURFACE FRONT INTO NORTHEAST KS/NORTHWEST MO
WEDNESDAY. HAVE MAINTAINED GOING CHANCE POPS ACROSS NORTHERN AND
WESTERN CWA ASSOCIATED WITH THIS FEATURE.

FORECAST FOR THURSDAY/FRIDAY TIMEFRAME BECOMES A LITTLE MORE TRICKY
AS REGION REMAINS UNDER INFLUENCE OF SOUTHWESTERLY FLOW ALOFT. HAVE
MAINTAINED 20-30 POPS THROUGH THIS TIMEFRAME...WITH THE BEST CHANCE
OF PRECIPITATION ACROSS FAR NORTHERN MO.

MODELS ARE IN REASONABLY GOOD AGREEMENT LIFTING SOUTHERN STREAM
SHORTWAVE INTO THE PLAINS REGION DURING THE SATURDAY/SATURDAY NIGHT
TIMEFRAME. THIS SCENARIO WILL NEED TO BE MONITORED CLOSELY...AS IF
CURRENTLY MODEL PROGS ARE IN THE BALLPARK THE POTENTIAL WOULD SEEM
TO EXIST FOR A SUBSTANTIAL RISK OF SEVERE WEATHER SOMETIME DURING
THE UPCOMING WEEKEND.

SEAMAN

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
KS...NONE.

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
559 AM CDT MON JUN 6 2005

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-071100-
ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-
JOHNSON KS-ATCHISON-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-
SCHUYLER-HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-
BUCHANAN-CLINTON-CALDWELL-LIVINGSTON-LINN-MACON-PLATTE-CLAY-RAY-
CARROLL-CHARITON-RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-
JOHNSON-PETTIS-COOPER-BATES-HENRY-
559 AM CDT MON JUN 6 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL
AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED STRONG THUNDERSTORMS ARE POSSIBLE TODAY OVER PARTS OF EAST
CENTRAL KANSAS AND WEST CENTRAL MISSOURI...ROUGHLY SOUTH OF A
CENTERVILLE KANSAS TO CLINTON LINE. SMALL HAIL...HEAVY RAINFALL AND
FREQUENT LIGHTNING ARE EXPECTED WITH THESE STORMS.

RECENT HEAVY RAINFALL HAS LEFT NUMEROUS RIVERS IN FLOOD ACROSS THE
OUTLOOK AREA.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THUNDERSTORMS ARE POSSIBLE WEDNESDAY AFTERNOON AND WEDNESDAY NIGHT
ALONG AND NORTH OF A LINE FROM PAOLA KANSAS TO MOBERLY MISSOURI. A
FEW OF THESE STORMS MAY BECOME SEVERE.

THERE IS ALSO A CHANCE OF THUNDERSTORMS ACROSS FAR NORTHERN MISSOURI
THURSDAY AND THURSDAY NIGHT. SEVERE WEATHER IS POSSIBLE WITH THIS THIS
ACTIVITY.

A POTENT UPPER LEVEL STORM SYSTEM IS EXPECTED TO BRING THUNDERSTORMS
TO THE ENTIRE OUTLOOK AREA FRIDAY AND SATURDAY. THESE STORMS MAY
BECOME SEVERE...PARTICULARLY SATURDAY AFTERNOON AND SATURDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AT TIMES FROM WEDNESDAY NIGHT
THROUGH SATURDAY NIGHT.

MJ

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
937 AM CDT MON JUN 6 2005

MOZ053-054-061515-
BATES-HENRY-
937 AM CDT MON JUN 6 2005

...SIGNIFICANT WEATHER ALERT FOR SOUTHEASTERN BATES AND SOUTHERN
HENRY COUNTIES...

AT 932 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES WEST OF APPLETON CITY...MOVING EAST AT 20
MPH.

THIS STORM WILL BE...
  NEAR MONTROSE BY 955 AM CDT.
  NEAR LA DUE BY 1010 AM CDT.
  NEAR DEEPWATER BY 1015 AM CDT.

THIS SLOW MOVING THUNDERSTORM HAS PRODUCED LOCAL RAINFALL AMOUNTS
BETWEEN TWO AND THREE INCHES IN THE PLEASANT GAP AND HUDSON
VICINITIES. IN ADDITION TO HEAVY RAIN, HAIL TO THE SIZE OF PENNIES
IS POSSIBLE WITH THIS STORM.

KOCH