Area Forecast Discussion
Issued by NWS Dodge City, KS

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FXUS63 KDDC 312305
AFDDDC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DODGE CITY KS
605 PM CDT FRI JUL 31 2015

...UPDATED AVIATION DISCUSSION...

.SHORT TERM...(THIS EVENING THROUGH SATURDAY)
ISSUED AT 1226 PM CDT FRI JUL 31 2015

THE SUMMER SUBTROPICAL RIDGE WAS CENTERED OVER ITS CLIMATOLOGICAL
POSITION FROM THE SOUTHERN ROCKIES INTO TEXAS TODAY. IN THE UPPER
TROPOSPHERE, WEST NORTHWEST FLOW EXTENDED FROM THE NORTHERN ROCKIES
THROUGH THE UPPER MISSISSIPPI VALLEY. WESTERN KANSAS WAS ON THE
SOUTH EDGE OF THE WESTERLIES AT 250MB. THE MESOSCALE CONVECTIVE
SYSTEM (MCS) THAT AFFECTED EXTREME SOUTHWEST KANSAS OVERNIGHT AND
THIS MORNING WAS DECREASING IN AREAL EXTENT AND MOVING VERY SLOWLY
TO THE EAST-SOUTHEAST...FOLLOWING ROUGHLY THE 3-8KM AGL MEAN FLOW
VECTOR (JUST NORTH OF THE CENTER OF THE MEAN ANTICYCLONE IN THIS
LAYER OVER WEST TEXAS). A COUPLE OF MESOSCALE CONVECTIVE VORTICITY
MAXIMAS COULD BE IDENTIFIED THROUGH VISIBLE SATELLITE AND EVEN THE
HOURLY RAP ANALYSIS FROM NEAR TUCUMCARI NEW MEXICO TO NEAR
SPRINGFIELD COLORADO. IT WOULD APPEAR AS OF THESE MESOSCALE FEATURES
WERE ACTUALLY HELPING TO MAINTAIN THE SMALL MCS THROUGH THE EARLY
AFTERNOON HOURS AS THE LEADING EDGE OF IT WAS MOVING INTO THE FAR
EASTERN OK-TX PANHANDLES. THE VERY NORTHERN EXTENT OF THIS MCS
EXTENDED INTO MORTON AND SEWARD COUNTIES, WHICH WAS HAVING AN IMPACT
ON SURFACE TEMPERATURES (COOLER THAN FORECAST IN THIS AREA). WE HAVE
ADJUSTED THE DAYTIME TEMPERATURES DOWNWARD ACROSS FAR SOUTHWEST
KANSAS AS A RESULT. ELSEWHERE...ESPECIALLY ACROSS WEST CENTRAL AND
CENTRAL KANSAS NORTH OF HIGHWAY 96, TEMPERATURES SHOULD TOP OUT IN
THE LOWER TO MID 90S.

AS WE GO IN TO TONIGHT...ANOTHER SMALL MCS SHOULD EVOLVE THROUGH THE
LATE NIGHT HOURS FROM CONVECTION ACROSS THE HIGHER TERRAIN OF THE
RATON MESA REGION. THIS CONVECTION SHOULD FOLLOW THE SAME GENERAL
TRACK AS THIS MORNINGS MCS, SO WE WILL KEEP THE BEST POPS ACROSS FAR
SOUTHWEST KANSAS AGAIN IN THE 40-50 PERCENT RANGE. THE BULK OF LATE
TONIGHT/TOMORROWS MCS SHOULD REMAIN ACROSS THE PANHANDLES REGION. IT
SHOULD BE CLOSE TO A RINSE AND REPEAT TYPE OF DEAL TOMORROW WITH A
SLOWLY DECAYING MCS SOMEWHERE JUST SOUTH OF OUR FORECAST AREA (OR
PERHAPS CLIPPING MORTON-SEWARD-MEADE) WITH WARMEST TEMPERATURES UP
NORTH ALONG I-70 (MID 90S) AND COOLEST TEMPERATURES ALONG THE OK
BORDER (LOWER-MID 80S, IF EVEN THAT WARM).

.LONG TERM...(SATURDAY NIGHT THROUGH FRIDAY)
ISSUED AT 338 PM CDT FRI JUL 31 2015

THE BEST CHANCE FOR THE NEXT ORGANIZED PRECIPITATION EVENT WILL BE
MONDAY NIGHT INTO TUESDAY. THE GLOBAL SPECTRAL MODELS CONTINUE TO
SHOW AN INTERACTION BETWEEN MONSOON PERTURBATIONS MOVING NORTHWARD
THROUGH THE DESERT SOUTHWEST...AND AN INCOMING SUBTROPICAL PACIFIC
JET MOVING INTO THE INTERMOUNTAIN WEST REGION. THIS WILL ACT TO
SHIFT THE MONSOON CIRCULATION NORTHEASTWARD SOME...ENHANCING THE
PRECIPITATION POTENTIAL FOR SOUTHWEST KANSAS. IT VERY WELL COULD BE
JUST ONE BIG MCS WE SEE OUT OF THIS EVENT, IN WHICH CASE IF THE
ECMWF HAS A HANDLE ON THINGS, WOULD BE MONDAY NIGHT. THIS IS WHEN
THE HIGHEST POPS ARE IN THE GRIDS FOR THE ENTIRE REGION. ONCE THAT
WAVE EXITS THE CENTRAL PLAINS...THE SUMMER SUBTROPICAL RIDGE WILL
BUILD BACK IN, HOWEVER DEEP TROPOSPHERIC MONSOON MOISTURE WILL BE
FAIRLY SCANT AND IT WILL NEED TO BE RECHARGED AGAIN BY WAY OF LATE
DAY HIGH TERRAIN THUNDERSTORMS. THE LATEST ECMWF FAVORS RIDGE-
BUILDING INTO THE NORTHERN PLAINS WHICH WOULD RESULT IN A WARMING OF
THE LOWER TROPOSPHERE AND SURFACE TEMPERATURES REACHING OR EXCEEDING
THE UPPER 90S BY MID TO LATE NEXT WEEK.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z SATURDAY EVENING)
ISSUED AT 604 PM CDT FRI JUL 31 2015

18Z BUFR SOUNDINGS INDICATING MOISTURE WILL INCREASE IN THE 850MB
TO 750 MB LEVELS EARLY SATURDAY MORNING AS A WEAK UPPER LEVEL
DISTURBANCE CROSSES SOUTHWEST KANSAS. THIS WILL BRING A PERIOD OF
4000FT TO 8000FT CEILINGS TO PORTIONS OF WESTERN KANSAS AFTER 09Z
SATURDAY. WINDS WILL BE SOUTHERLY AT LESS THAN 10 KNOTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
DDC  68  87  67  93 /  10  10  10  10
GCK  67  87  67  92 /  10  10  10  10
EHA  66  85  67  92 /  30  40  20  10
LBL  68  83  68  92 /  20  30  20  10
HYS  67  93  67  95 /  10  10  10  10
P28  71  90  70  94 /  10  10  10  10

&&

.DDC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM...UMSCHEID
LONG TERM...UMSCHEID
AVIATION...BURGERT


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