251
FXUS63 KJKL 121811
AFDJKL
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON KY
211 PM EDT FRI JUN 12 2026
KEY MESSAGES
- A PROGRESSIVE COLD FRONT BRINGS SHOWERS AND NUMEROUS
THUNDERSTORMS TO THE AREA ON FRIDAY, WITH A RISK FOR STRONG WIND
GUSTS AND LOCALLY HEAVY RAINFALL WITHIN THE STRONGEST STORMS.
- HIGH PRESSURE BRIEFLY USHERS IN COOLER AND DRIER AIR ON
SATURDAY, BUT UNSETTLED WEATHER AND WIDESPREAD RAIN CHANCES
RETURN OVERNIGHT INTO SUNDAY.
- EXPECT COOLER THAN NORMAL TEMPERATURES EARLY NEXT WEEK AS BROAD
TROUGHING DOMINATES THE WEATHER PATTERN ALOFT.
SHORT TERM
(THIS EVENING THROUGH SATURDAY NIGHT)
ISSUED AT 211 PM EDT FRI JUN 12 2026
A PRIMARILY ZONAL PATTERN IS EXPECTED ACROSS THE OHIO VALLEY THROUGH
THE SHORT-TERM PERIOD. A DISTURBANCE CROSSES THE AREA LATE THIS
AFTERNOON INTO EARLY EVENING, OUTRUNNING A COLD FRONT WHICH WILL
LINGER NEAR/ALONG THE BORDER WITH TN AND VA TONIGHT. THIS FRONT THEN
REMAINS STATIONARY AND SLOWLY DISSIPATES INTO SATURDAY, WHEN ANOTHER
SHORTWAVE MOVES EAST ACROSS THE SOUTHERN OHIO RIVER VALLEY REGION IN
THE LATE AFTERNOON THROUGH OVERNIGHT AND USHERS INCREASED MOISTURE
AND INSTABILITY BACK INTO THE REGION FROM THE SOUTHWEST.
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
LINGER INTO THIS EVENING ALONG AND AHEAD OF THE COLD FRONT, WITH A
DRIER AND MORE STABLE AIR MASS BUILDING IN BEHIND THE FRONT TONIGHT
INTO SATURDAY, ESPECIALLY NORTH OF KY HIGHWAY 80. THUS, POPS WILL
DROP TO OR NEAR ZERO FOR PRETTY MUCH ALL AREAS BY DAWN SATURDAY. DEW
POINT TEMPERATURES WILL BE 10 TO 15 DEGREES LOWER SATURDAY THAN
TODAY; THUS, WITH THE DRIER AIR MASS IN PLACE AIR TEMPERATURES WILL
BE SIMILAR TO TODAY, OR PERHAPS A DEGREE OR TWO WARMER, IN THE MID
TO UPPER 80S.
WEAK WARM ADVECTION WILL ADVECT HIGHER DEW POINTS INTO THE AREA
SATURDAY NIGHT, WITH 60S DEW POINTS OVERSPREADING THE AREA ONCE
AGAIN, WITH PERHAPS A LOWER-70S READING IN THE LAKE CUMBERLAND AREA
BY DAWN SUNDAY MORNING. WITH AN APPROACHING DISTURBANCE, MODELS
SUGGEST AN MCS MOVING INTO THE REGION FROM THE WEST TOWARD DAWN
SUNDAY, WITH POPS RISING ABOVE 50 PERCENT EVERYWHERE EXCEPT FAR
EASTERN KY BY 12Z SUNDAY.
LONG TERM
(SATURDAY NIGHT THROUGH THURSDAY)
ISSUED AT 135 AM EDT FRI JUN 12 2026
THE LONG TERM FORECAST PERIOD WILL BE GOVERNED BY BROAD TROUGHING
OVER THE NORTHEASTERN QUADRANT OF THE CONTIGUOUS UNITED STATES. AS
AN UPPER LEVEL LOW SPINS OVER ONTARIO AND QUEBEC THROUGH MUCH OF
NEXT WEEK, AND A SERIES OF SHORTWAVE TROUGHS WILL EJECT AROUND ITS
BACKSIDE AND INTO THE GREATER OHIO RIVER VALLEY IN THIS TIME FRAME.
CONFIDENCE IS HIGH THAT THE FIRST DISTURBANCE WILL APPROACH THE
FORECAST AREA FROM SATURDAY NIGHT INTO SUNDAY, GIVING CREDENCE TO
THE NOTION THAT WIDESPREAD RAIN CHANCES WILL RETURN TO THE FORECAST
AREA IN THIS TIME FRAME. WHILE MODELS ARE IN GENERALLY GOOD
AGREEMENT REGARDING THIS FIRST DISTURBANCE'S TIMING, THERE IS STILL
SOME UNCERTAINTY SURROUNDING ITS AMPLITUDE. THAT LIMITS FORECAST
CONFIDENCE IN ANY POTENTIAL SENSIBLE WEATHER IMPACTS AT THE CURRENT
MOMENT. SIMILAR THEMES LINGER THROUGH THE REST OF THE LONG TERM
FORECAST PERIOD. INCREASING MODEL SPREAD MAKES IT DIFFICULT TO
PINPOINT THE SPECIFIC PRECIPITATION FORECAST DETAILS DURING THE
SUBSEQUENT SHORTWAVE PASSAGES, BUT EACH DISTURBANCE LOOKS TO
REINFORCE THE OVERARCHING TROUGHING PATTERN ALOFT. SUCH A PATTERN
FAVORS COOLER THAN NORMAL TEMPERATURES, AND THIS IS REFLECTED IN THE
TEMPERATURE FORECAST FOR NEXT WEEK.
WHEN THE PERIOD OPENS ON SATURDAY EVENING, ALL EYES WILL BE ON THE
POTENTIAL FOR UPSTREAM CONVECTION. IF THE MORE AMPLIFIED MODEL
SOLUTIONS COME TO FRUITION, A SHARPER SHORTWAVE TROUGH COULD PROVIDE
SUFFICIENT DYNAMIC SUPPORT FOR STRONGER STORMS ON SATURDAY NIGHT IN
WESTERN PORTIONS OF THE COMMONWEALTH. SOME OF THE AVAILABLE MACHINE
LEARNING, ANALOG, AND AI-ENHANCED FORECAST GUIDANCE SUPPORTS THIS
IDEA, BUT BY THE TIME ANY ACTIVITY REACHES OUR FORECAST AREA, IT
WILL BE WORKING AGAINST THE DIURNAL INSTABILITY CYCLE. RAIN CHANCES
DO NOT REACH OUR LAKE CUMBERLAND COUNTIES UNTIL AFTER MIDNIGHT ON
SUNDAY MORNING, AND THE STORMS COULD BE MOVING INTO A STABLE
BOUNDARY LAYER BY THEN. GIVEN THE ANTECEDENT HIGH PRESSURE IN PLACE,
IT IS PLAUSIBLE FOR VALLEY LOCALES TO THERMALLY DECOUPLE AFTER
SUNSET. THIS WOULD ALLOW EFFICIENT RADIATIONAL COOLING TO TAKE ROOT,
AND IN ACCORDANCE WITH LOCAL CLIMATOLOGICAL KNOWLEDGE, MODEST RIDGE
VALLEY SPLITS AND PATCHY VALLEY FOG WERE ADDED TO THE FORECAST GRIDS
FOR THIS TIME FRAME. ASSUMING CONVECTIVE CLOUD DEBRIS DOESN'T
INTERRUPT THESE CLASSIC DIURNAL PROCESSES, EASTERN VALLEYS SHOULD
DIP DOWN INTO THE UPPER 50S/LOWER 60S BY MIDNIGHT. WEST OF I-75,
TEMPERATURES WILL STAY IN THE MID/UPPER 60S, AS THIS IS WHERE THE
GREATEST SKY COVER AND THE GREATEST THUNDERSTORM CHANCES ARE
FORECAST. MODEL SOUNDINGS RESOLVE ONLY MEAGER AMOUNTS OF MOSTLY-
ELEVATED CAPE BY THEN THOUGH, SO STORMS WOULD LIKELY SUCCUMB TO A
WEAKENING TREND AS THEY APPROACH I-75. FURTHERMORE, THEY WILL LIKELY
BE OUTRUNNING THE BETTER DYNAMIC SUPPORT ALOFT.
THE PARENT SHORTWAVE AXIS REACHES OUR PORTION OF THE OHIO RIVER
VALLEY ON SUNDAY AFTERNOON AND EVENING. THE EUROPEAN FAMILY OF
FORECAST GUIDANCE MODELS CONTINUES TO RESOLVE A SHARPER ITERATION OF
THIS DISTURBANCE THAN ITS AMERICAN COUNTERPARTS, BUT BOTH AGREE IN
AN ARRIVAL TIME THAT OVERLAPS WITH PEAK DIURNAL HEATING. THE
MAGNITUDE OF SAID HEATING WILL LIKELY DEPEND ON THE EVOLUTION OF THE
OVERNIGHT/AM ACTIVITY AND HOW MUCH CLOUD COVER IT LEAVES BEHIND,
WHICH WILL THEN DETERMINE THE INSTABILITY PARAMETER SPACING FOR ANY
FRONTALLY FORCED PM CONVECTION. MESOSCALE DETAILS LIKE THIS ARE HARD
TO DETERMINE AT THE CURRENT TEMPORAL RANGE, BUT BASED ON THE MEDIUM-
RANGE CONVECTIVE GUIDANCE, THE GREATEST CHANCES FOR STRONGER STORMS
ON SUNDAY MAY BE IN SOUTHERN AND SOUTHEASTERN PORTIONS OF THE
COMMONWEALTH. THANKFULLY, THIS SYSTEM LOOKS PROGRESSIVE, AND
RELATIVELY COOLER AND DRIER AIR WORKS ITS WAY INTO THE FORECAST AREA
AFTER FRONTAL PASSAGE ON SUNDAY NIGHT. THIS WILL HELP TO REDUCE THE
RISK FOR HYDROLOGICAL IMPACTS, BUT WE WILL NEED TO WATCH THE EFFECTS
OF TODAY'S CONVECTIVE ACTIVITY ON SOILS IN THE CUMBERLAND BASIN
BEFORE WE COMPLETELY WRITE THIS SYSTEM OFF.
THE AFOREMENTIONED POST-FRONTAL CAA WILL YIELD PLEASANT CONDITIONS
IN EASTERN KENTUCKY TO START THE NEXT WORK WEEK. WE WILL BE WAKING
UP TO AM LOWS IN THE 50S ON MONDAY, TUESDAY, AND WEDNESDAY MORNINGS
NEXT WEEK, WITH AFTERNOON HIGHS IN THE UPPER 70S/LOWER 80S. MEAN
PWATS IN THE LREF DATA GENERALLY DIP TO BELOW 1 INCH IN THIS TIME
FRAME, SO APPARENT TEMPERATURES WILL BE VERY CLOSE TO THESE FORECAST
THERMOMETER READINGS. IN OTHER WORDS, IT WILL FEEL FANTASTIC OUTSIDE
FOR THE FIRST HALF OF THE WORK WEEK. A SECOND SHORTWAVE COULD SPARK
A STRAY SHOWER OR TWO IN SE KY ON MONDAY, BUT IT WILL BE WORKING
WITH LESS MOISTURE AND LOWER TEMPERATURES THAN ITS PREDECESSOR. MOST
OF THE AREA WILL LIKELY STRAY DRY AND ENJOY MOSTLY SUNNY CONDITIONS
EARLY NEXT WEEK, WITH THE NEXT SHOT AT AREA-WIDE RAIN CHANCES
HOLDING OFF UNTIL A THIRD, BETTER-DEFINED SHORTWAVE APPROACHES ON
EITHER WEDNESDAY OR THURSDAY. AS DISCUSSED IN THE INTRODUCTORY
PARAGRAPH, THERE IS TOO MUCH COMPOUNDING FORECAST UNCERTAINTY TO
HIGHLIGHT SENSIBLE WEATHER SPECIFICS THAT FAR OUT. IN THE MEANTIME
THOUGH, READERS ARE ENCOURAGED TO GET OUTSIDE AND ENJOY THIS
PLEASANT SUMMERTIME WEATHER FORECAST!
AVIATION
(FOR THE 18Z TAFS THROUGH 18Z SATURDAY AFTERNOON)
ISSUED AT 116 PM EDT FRI JUN 12 2026
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THROUGH THE
AFTERNOON AHEAD OF A COLD FRONT, WITH BEST CHANCES SOUTH AND
SOUTHEAST OF KSYM AND KIOB. CHANCES MAY LINGER BEYOND 00Z FOR THE
4 MORE SOUTHERN/SOUTHEASTERN TAF LOCATIONS BASED ON TRENDS SINCE
ISSUANCE. OTHERWISE, ANY THUNDERSTORM THAT DEVELOPS AT OR NEAR A
TAF SITE SHOULD BRING BRIEF REDUCTIONS TO MVFR/IFR OR PERHAPS BRIEFLY
LOWER, AS WELL AS GUSTY AND ERRATIC OUTFLOW WINDS. SOUTHWESTERLY
TO WEST WINDS SHOULD INCREASE TO NEAR 10 KTS THROUGH 18Z. WINDS
WILL TREND NORTHWESTERLY BETWEEN 18Z AND 00Z AND THEN GRADUALLY
WEAKEN TO LIGHT AND VARIABLE TO END THE PERIOD. AS HIGH PRESSURE
BUILDS IN AND WINDS SLACKEN LATE IN THE PERIOD, FOG SHOULD AFFECT
VALLEY LOCATIONS BY 04Z AND AFTER AND SOME OR ALL OF THE TAF SITES
COULD ALSO EXPERIENCE FOG LIFTING INTO THEM MAINLY FROM 06Z
ONWARD. VFR CONDITIONS ARE EXPECTED AFTER FOG LIFTS/BURNS OFF
BETWEEN 11Z AND 14Z SATURDAY.
JKL WATCHES/WARNINGS/ADVISORIES
NONE.
SHORT TERM...CMC
LONG TERM...MARCUS
AVIATION...CMC
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