141
FXUS63 KIWX 170527
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1227 AM EST WED DEC 17 2025
KEY MESSAGES
- MILD THURSDAY WITH HIGHS IN THE MID 40S TO LOWER 50S.
- FLASH FREEZING CONDITIONS LIKELY LATE THURSDAY NIGHT WITH
TEMPERATURES FALLING TO AROUND 20 DEGREES.
- RAIN CHANGING TO SNOW THURSDAY NIGHT. SNOW ENDING FRIDAY. SNOW
ACCUMULATIONS AROUND AN INCH OR LESS.
- MILD ON SATURDAY WITH HIGHS AROUND 40 TO 45.
DISCUSSION
ISSUED AT 215 PM EST TUE DEC 16 2025
RETURN FLOW NORTHWEST OF A SURFACE HIGH ALONG THE ATLANTIC HAS
BECOME ESTABLISHED ACROSS THE OHIO VALLEY INTO THE MIDWEST.
SOUTHWEST FLOW OF 10 TO 15 MPH TONIGHT WILL HELP KEEP LOWS MUCH
MILDER TONIGHT THEN LAST NIGHT (FROM AROUND 10 DEGREES LAST
NIGHT TO AROUND 30 DEGREES TONIGHT). THE SOUTHERLY OR
SOUTHWESTERLY FLOW WILL CONTINUE WEDNESDAY WITH TEMPERATURES
RISING SEVERAL DEGREES ABOVE FREEZING. THE SEASONABLY MILD
WEATHER WILL CONTINUE INTO THURSDAY WITH TEMPERATURES RISING
INTO THE 40S TO AROUND 50 DEGREES.
AS FOR CHANCES FOR FLOODING, ALL INDICATIONS ARE VERY LOW
FLOODING PROBABILITIES. ALTHOUGH THE TEMPERATURES WILL BRIEFLY
RISE INTO THE 40S TO AROUND 50 THURSDAY, RIVER LEVELS REMAIN
VERY LOW. HYDROGRAPHS INDICATE THE FLOW ON NUMEROUS RIVERS WERE
100 CFS OR LESS. COCORAHS OBSERVATIONS INDICATED SWE IN SNOWPACK
WAS 0.50" OR LESS. ADDITIONAL RAIN/QPF FROM PRECIPITATION PER
WPC IS FORECAST TO BE AROUND 0.50".
OTHERWISE, A FLASH FREEZE TYPE OF SCENARIO IS SETTING UP FOR
THURSDAY NIGHT. TEMPERATURES NEAR 50 DEGREES THURSDAY AFTERNOON
ARE EXPECTED TO FALL INTO THE TEENS BY LATE THURSDAY NIGHT. ICY
ROADS ARE LIKELY WHERE ROADS REMAIN WET THURSDAY NIGHT. AS FOR
FRIDAY THROUGH SUNDAY, FAST BUT WEAK SYSTEMS IN HIGH ZONAL FLOW
WILL BRING WINDY CONDITIONS AT TIMES ACCOMPANIED BY BRIEFLY
COLDER WEATHER. ANY PRECIPITATION SHOULD BE LIGHT. HIGHS FRIDAY
NEAR 25 WILL REBOUND TO AROUND 40 SATURDAY, THEN TURN COLDER
SUNDAY.
AVIATION /06Z TAFS THROUGH 06Z THURSDAY/
ISSUED AT 1222 AM EST WED DEC 17 2025
VFR TO MVFR CONDITIONS EXPECTED AT THE TERMINALS THIS PERIOD,
WITH LLWS TO 45 KNOTS THROUGH 8-10Z. WARM AIR ADVECTION EXPECTED
TO CONTINUE THROUGH TODAY, WITH SOUTHWEST WINDS SHIFTING WEST
THEN BACK TO THE SOUTH THROUGH TONIGHT. ISENTROPIC ASCENT
BRINGING POTENTIAL FOR MVFR CEILINGS AT BOTH SITES IN THE
15-18Z, THOUGH DRIER LOW LEVELS SHOULD PRECLUDE ANY
PRECIPITATION FROM DEVELOPING (DESPITE LIGHT REFLECTIVITIES ON
RADAR ATM). TEMPERATURES RISING TO AROUND 40 DEGREES TODAY COULD
LEAD TO SOME MIST/BR DEVELOPMENT WITH THE SNOWPACK (MORESO AT
KSBN), BUT LEFT OUT FOR NOW GIVEN GREATER LIKELIHOOD FOR LOWER
CEILINGS.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 1 PM EST THIS AFTERNOON FOR LMZ043-
046.
DISCUSSION...SKIPPER
AVIATION...MCD
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page