221
FXUS63 KTOP 270515
AFDTOP
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TOPEKA KS
1215 AM CDT FRI JUN 27 2025
KEY MESSAGES
- SCATTERED THUNDERSTORMS EXPECTED THIS AFTERNOON AND EVENING. A FEW
INSTANCES OF DAMAGING WINDS AND LOCALLY HEAVY RAINFALL POSSIBLE, BUT
SEVERE WEATHER POTENTIAL IS LOW OVERALL.
- WARM AND HUMID THROUGH SUNDAY. SUNDAY NIGHT COLD FRONT BRINGS LESS
HUMID AND SLIGHTLY COOLER WEATHER FOR NEXT WEEK.
- BEST RAIN AND STORM CHANCES (50-70%) SUNDAY NIGHT WITH THE
COLD FRONT, OTHERWISE SMALL (10-30%) POP-UP STORM CHANCES MOST
AFTERNOONS.
DISCUSSION
ISSUED AT 157 PM CDT THU JUN 26 2025
SURFACE OBSERVATIONS THIS AFTERNOON DEPICT A WEAK AREA OF LOW
PRESSURE ACROSS EASTERN NEBRASKA, WITH A WEAKENING COLD FRONT
EXTENDING SOUTHWEST INTO CENTRAL KANSAS. SATELLITE OBSERVATIONS ARE
SHOWING SEVERAL BANDS OF INCREASINGLY AGITATED CUMULUS AHEAD OF AND
PARALLEL TO THE FRONT. GIVEN A MOIST AND MOSTLY UNCAPPED AIRMASS,
CONTINUED HEATING OVER THE NEXT HOUR OR TWO SHOULD ALLOW SCATTERED
THUNDERSTORMS TO DEVELOP. FORCING DOES REMAIN QUITE WEAK THOUGH,
KEEPING CONFIDENCE ON THE LOW END WITH REGARD TO EXACT TIMING AND
COVERAGE OF CONVECTION. REGARDLESS, THE ENVIRONMENT CONTINUES TO BE
A VERY TYPICAL SUMMER-TIME SETUP. EFFECTIVE SHEAR IS WEAK, AT LESS
THAN 15 KTS, INSTABILITY IS MODERATE (2000-2500 J/KG), AND MOISTURE
CONTENT IS HIGH (PWAT 1.8-2.0"). DAMAGING WINDS WITH GUSTS UP TO
AROUND 60 MPH WILL BE THE MAIN SEVERE HAZARD, THOUGH SOME SMALL HAIL
COULD OCCUR WITH INITIAL UPDRAFTS. OTHERWISE, AS STORMS GROW
UPSCALE, THERE COULD BE SOME ISOLATED AREAS THAT PICK UP A QUICK FEW
INCHES OF RAIN WITH A LOW-END FLASH FLOOD RISK. GENERALLY THOUGH,
THE MORE SCATTERED NATURE OF CONVECTION AND A SLOW BUT STEADY
EASTWARD PROGRESSION WILL KEEP ACCUMULATIONS FOR MOST PLACES AROUND
OR BELOW ONE INCH. SOME PLACES IN NORTH-CENTRAL KS LIKELY WON'T SEE
ANYTHING. AT ANY RATE, ANY HEAVIER STORMS WILL TEND TO CLEAR EAST-
CENTRAL KS BY LATE EVENING, THOUGH A FEW WEAKER SHOWERS MAY LINGER
OVERNIGHT.
WHATEVER WEAK BOUNDARY THAT STILL EXISTS BY TOMORROW WILL LIFT BACK
NORTH OF THE AREA AS A BROAD ZONAL JET STREAM REESTABLISHES ITSELF
OVER THE NORTHERN PLAINS. THIS WILL KEEP WARM AND HUMID CONDITIONS
IN PLACE THROUGH THE WEEKEND. HIGHS CLIMB INTO THE 90S, LOWS STAY IN
THE 70S, WITH HEAT INDICES APPROACHING 100. GIVEN A CONTINUED MOIST
AIRMASS WITH ONLY VERY WEAK CIN, CAN'T RULE OUT AN ISOLATED SHOWER
OR STORM ACROSS MUCH OF THE WEEKEND. HOWEVER WITHOUT ANY FRONT OR
UPPER SHORTWAVE TO ENCOURAGE ASCENT, MOST PLACES WILL REMAIN DRY
THROUGH SUNDAY AFTERNOON.
BY SUNDAY EVENING AND OVERNIGHT, A FRONT WILL PUSH SOUTHEAST ACROSS
THE AREA AS AN UPPER TROUGH BEGINS TO AMPLIFY OVER THE GREAT LAKES.
THIS WILL INCREASE SHOWER/STORM CHANCES AREA-WIDE. BEHIND THE FRONT,
SLIGHTLY COOLER AND DRIER AIR WILL WORK IN, WITH DEWPOINTS DROPPING
INTO THE LOW/MID 60S BY TUESDAY AFTERNOON. HIGH TEMPERATURES LOOK TO
BE NEAR SEASONAL AVERAGES, IN THE UPPER 80S, WITH LOW TEMPERATURES
IN THE MID 60S SLIGHTLY BELOW AVERAGE. PRECIPITATION CHANCES LOOK
LOWER INTO MID-WEEK BEHIND THE FRONT, THOUGH IN A TYPICAL SUMMER
PATTERN LIKE THIS IT IS DIFFICULT TO DISCOUNT POPS ALTOGETHER THIS
FAR OUT.
AVIATION /06Z TAFS THROUGH 06Z SATURDAY/
ISSUED AT 1208 AM CDT FRI JUN 27 2025
A FEW MID CLOUDS REMAIN AS SHOWERS EXIT EAST OF THE TERMINALS
EARLY IN THE PERIOD. WINDS BACK TO THE SOUTH EARLY THIS MORNING
AND REMAIN SOUTHERLY THROUGH THE DAY BUT REMAIN GENERALLY LESS
THAN 10KTS. COULD SEE A FEW MID TO LATE AFTERNOON SHOWERS OR A
BRIEF THUNDERSTORM DEVELOP WITH THE HEATING OF THE DAY.
CONFIDENCE IN THIS SCENARIO IS TOO LOW TO MENTION AT THIS TIME.
TOP WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION...REESE
AVIATION...DRAKE
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