127
FXUS63 KEAX 032255
AFDEAX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
555 PM CDT THU SEP 3 2026
KEY MESSAGES
- WELL ABOVE NORMAL TEMPERATURES ARE EXPECTED TO CONTINUE INTO
NEXT WEEK.
- EXTREME HEAT WARNING IN EFFECT THROUGH 8 PM SATURDAY
REGION WIDE.
- EXTREME HEAT WARNING IN EFFECT THROUGH 8 PM TUESDAY FOR
AREAS ALONG AND SOUTH OF ST. JOSEPH TO BOONVILLE.
DISCUSSION
ISSUED AT 202 PM CDT THU SEP 3 2026
CURRENT H5 ANALYSIS SHOWS THE 594 DAM HIGH CENTERED OVER THE
MID SOUTH INTO SOUTHERN APPALACHIA BETWEEN AN UPPER TROUGH
ACROSS THE PACIFIC NORTHWEST AND ANOTHER OVER ONTARIO AND
QUEBEC, YIELDING YET ANOTHER HOT AFTERNOON ACROSS OUR CWA WITH 2
PM TEMPERATURES IN THE MID TO UPPER 90S, WITH HEAT INDICES IN
THE UPPER 90S TO THE LOWER 100S. THE SYNOPTIC SCALE PATTERN
REMAINS MOSTLY THE SAME THROUGH THE WEEKEND, WITH THE CENTER OF
THE H5 HIGH SLIDING WESTWARD OVER THE REGION TOMORROW AND
SATURDAY. THIS WILL KEEP HIGH TEMPERATURES IN THE MID 90S TO AS
HIGH AS 100 DEGREES MAX AND HEAT INDICES IN THE UPPER 90S TO AS
HIGH AS 105 FOR FRIDAY AND SATURDAY AFTERNOON. DUE TO THE LONG
DURATION OF THE HEAT AS WELL AS OVERNIGHT LOW TEMPERATURES
REMAINING ELEVATED, WENT AHEAD AND UPGRADED THE HEAT ADVISORY TO
AN EXTREME HEAT WARNING FOR THE ENTIRE CWA THROUGH 8 PM
SATURDAY.
BY SUNDAY AND INTO MONDAY, THE CENTER OF THE H5 HIGH SLIDES A
BIT FURTHER WEST TOWARD THE PLAINS, WITH MID LEVEL HEIGHTS
REDUCING SLIGHTLY, ESPECIALLY ACROSS NORTHERN AND NE MISSOURI
WHERE TEMPERATURES AND HEAT INDICES SHOULD BE A BIT COOLER
(ESPECIALLY ON MONDAY). HOWEVER, TEMPERATURES IN THE UPPER 90S
AND MAX HEAT INDICES IN THE UPPER 90S TO LOWER 100S SHOULD
CONTINUE FOR AREAS ALONG AND SOUTH OF ROUGHLY A ST. JOSEPH TO
BOONVILLE LINE. BY TUESDAY, AN UPPER TROUGH MOVING ACROSS THE
INTERMOUNTAIN WEST AND INTO THE NORTHERN PLAINS SHOULD PUSH THE
CENTER OF THE H5 HIGH AND MID/UPPER RIDGE AXIS BACK OVER OUR
CWA, WITH THE H5 HIGH STRENGTHENING BACK TOWARD 595 DAM. THIS
SHOULD YIELD HIGH TEMPERATURES IN THE UPPER 90S TO NEAR 100
DEGREES, WITH MAX HEAT INDICES UP TO 105 DEGREES. THUS, THE
EXTREME HEAT WARNING HAS BEEN EXTENDED THROUGH AT LEAST 8 PM
TUESDAY FOR THESE LOCATIONS ALONG AND SOUTH OF A ST. JOSEPH TO
BOONVILLE LINE. IT IS POSSIBLE THAT THE EXTREME HEAT WARNING MAY
NEED TO BE EXTENDED INTO WEDNESDAY, AS WELL.
INCREASED FORECAST CERTAINTY ARRIVES BY THURSDAY AS SOME
GUIDANCE SUGGESTS AN UPPER TROUGH MOVING ACROSS THE UPPER
MIDWEST AND GREAT LAKES AREAS AND DIGGING SOUTHWARD INTO THE
OHIO VALLEY ON THURSDAY, POTENTIALLY SENDING A COLD FRONT INTO
THE CWA FROM THE NORTH SOMETIME THURSDAY AFTERNOON/EVENING,
WHICH WOULD BRING SLIGHTLY COOLER TEMPERATURES AND CHANCES FOR
SHOWERS/STORMS. OTHER GUIDANCE KEEPS THIS TROUGH AND FRONT
FURTHER NORTH, WITH THE HEAT DOME REMAINING IN PLACE OVERHEAD
INTO THURSDAY AND PERHAPS EVEN FRIDAY. THE NBM INTERQUARTILE
RANGE FOR MAXT AT MCI ON THURSDAY IS 87 DEGREES AND 97 DEGREES,
RESPECTIVELY, AND 84 AND 94 DEGREES, RESPECTIVELY, ON FRIDAY.
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
ISSUED AT 547 PM CDT THU SEP 3 2026
VFR CONDITIONS THROUGH THE FORECAST PERIOD. SOUTHERLY WINDS
AROUND 5-10KTS OVERNIGHT. SSW GUSTS AROUND 15-20KTS ARE
POSSIBLE FRIDAY AFTERNOON ALONG WITH SOME SCATTERED LOW-LEVEL
CUMULUS.
EAX WATCHES/WARNINGS/ADVISORIES
MO...EXTREME HEAT WARNING UNTIL 8 PM CDT TUESDAY FOR MOZ020>022-
028>031-037>040-043>046-053-054.
EXTREME HEAT WARNING UNTIL 8 PM CDT SATURDAY FOR MOZ001>008-
011>017-023>025-032-033.
KS...EXTREME HEAT WARNING UNTIL 8 PM CDT TUESDAY FOR KSZ025-057-060-
102>105.
DISCUSSION...WILLIAMS
AVIATION...IPC
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