181
FXUS63 KFSD 290449
AFDFSD
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1049 PM CST SUN DEC 28 2025
KEY MESSAGES
- ADDITIONAL SNOW AND CONTINUED STRONG WINDS LEAD TO REDUCED
VISIBILITY, A QUARTER MILE OR LESS THROUGH THE OVERNIGHT HOURS
ACROSS SOUTHWESTERN MN AND NORTHWESTERN IA DUE TO FALLING AND
BLOWING SNOW. TOWARD I-29, VISIBILITY MAY DROP BELOW A MILE.
- NORTHWEST WINDS WILL GUST TO 45 MPH TONIGHT GRADUALLY TAPER
OFF THROUGH MONDAY.
- MUCH COLDER AIR WILL ACCOMPANY THESE STRONG WINDS, LEADING TO
WIND CHILL VALUES OF 10 BELOW TO 20 BELOW ZERO INTO MONDAY
MORNING.
- AFTER TONIGHT, THE PROBABILITY OF IMPACTFUL SYSTEMS WILL BE
LOW OVER THE NEXT SEVERAL DAYS.
DISCUSSION
ISSUED AT 205 PM CST SUN DEC 28 2025
A POTENT UPPER LEVEL LOW CONTINUES TO DEEPEN AND ROTATE SOUTHEAST,
LEAVING THE AREA WITH WINDY CONDITIONS INTO MONDAY. AS THIS LOW WRAPS
UP, WARMING ALOFT PUSHES TEMPERATURES FROM BELOW THE DGZ BACK INTO
THE DGZ AND SHOULD BRING ANOTHER ROUND OF SNOW TO AREA MAINLY NORTH
OF I-90 WEST OF I-29 AND SOUTH INTO PARTS OF NORTHWEST IA NEAR AND
EAST OF I-29 THIS EVENING. WITH ROUGHLY 1-4 INCHES OF FRESH, POWDERY
SNOW IN PLACE AND WIND GUSTS CONTINUING AT 45 TO 55 MPH, REDUCED
VISIBILITIES WILL CONTINUE INTO THE NIGHT, AND LIKELY BE 1/4 MILE OR
LESS AT TIMES IN PARTS OF SOUTHWEST MN AND NORTHWEST IA WHERE THE
HIGHER SNOWFALL AMOUNTS ARE. A BRIEF IMPROVEMENT IN VISIBILITY IS
LIKELY THIS AFTERNOON BEFORE COMING BACK DOWN AFTER SUNSET WITH THIS
WRAP AROUND, THUS THE BLIZZARD WARNING WILL REMAIN IN PLACE DURING
THIS TIME THROUGH 12Z MONDAY MORNING. THE ADVISORY TO THE WEST AND
SOUTH OF THE BLIZZARD WARNING WILL BE A LITTLE MORE QUESTIONABLE AS
SNOW THIS EVENING WILL BE LIGHTER OR POSSIBLY NOT OCCUR AT ALL, SO
WE WILL MONITOR TO SEE IF VISIBILITIES IMPROVE LATER THIS AFTERNOON
TO DETERMINE THE EXTENT OF THE ADVISORY IN TIME AND AREAL COVERAGE.
NORTHWEST FLOW ALOFT WILL BRING GENERALLY DRY CONDITIONS TO THE AREA
THROUGH THE WEEK. ONCE EXCEPTION MAY BE WEDNESDAY WHEN A WEAK WAVE
MOVES QUICKLY BY. FOR NOW IMPACTS APPEAR LIMITED WITH THE BETTER
CHANCE FOR A LITTLE LIGHT SNOW NORTH OF I-90. WILL NEED TO KEEP AN
EYE ON THE WARM LAYER ALOFT AS A BRIEF PERIOD OF MIXED PRECIPITATION
MAY BECOME POSSIBLE. OTHERWISE TEMPERATURES WILL BE NEAR OR BELOW
NORMAL THROUGH THE PERIOD.
AVIATION /06Z TAFS THROUGH 06Z TUESDAY/
ISSUED AT 1042 PM CST SUN DEC 28 2025
SNOW CONTINUES TO PIVOT SOUTH/SOUTHEAST TONIGHT INTO EARLY
MONDAY, LINGERING THE LONGEST ACROSS SOUTHWESTERN MN AND
NORTHWESTERN IA. HEAVIEST ACCUMULATIONS WILL BE IN THIS AREA.
EXPECT IFR TO LIFR VISIBILITY AND MVFR/IFR STRATUS WITH FALLING
SNOW.
STRONG NORTHWESTERLY WINDS CONTINUE TO GUST AROUND 40 KNOTS INTO
TONIGHT, SLOWLY TAPERING DOWN MONDAY MORNING INTO THE EARLY
AFTERNOON. EXPECT GUSTS STILL AROUND 30 KNOTS EAST OF I-29 INTO
THE AFTERNOON. THESE WINDS, COMBINED WITH NEW AND FALLING SNOW,
WILL LEAD TO REDUCED VISIBILITY. OUTSIDE OF FALLING SNOW,
SHOULD SEE LOWER END VFR TO MVFR VISIBILITY, WITH SOME IFR
BLOWING SNOW OVERNIGHT FOR AREAS EAST OF I-29.
MVFR STRATUS SHOULD LIFT THROUGH THE MORNING HOURS. AS WINDS AND
BLOWING SNOW TAPER DOWN, VFR CONDITIONS BY/DURING MONDAY
AFTERNOON.
FSD WATCHES/WARNINGS/ADVISORIES
SD...WINTER WEATHER ADVISORY UNTIL 6 AM CST MONDAY FOR SDZ040-055-
056-061-062-066-067-069>071.
WIND ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR SDZ040-055-056-
061-062-066-067-069>071.
MN...WINTER WEATHER ADVISORY UNTIL 6 AM CST MONDAY FOR MNZ098.
WIND ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR MNZ071-072-080-
081-089-090-097-098.
BLIZZARD WARNING UNTIL 6 AM CST MONDAY FOR MNZ071-072-080-081-
089-090-097.
IA...WINTER WEATHER ADVISORY UNTIL 6 AM CST MONDAY FOR IAZ001-012-
020>022-031-032.
WIND ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR IAZ001>003-
012>014-020>022-031-032.
BLIZZARD WARNING UNTIL 6 AM CST MONDAY FOR IAZ002-003-013-014.
NE...WINTER WEATHER ADVISORY UNTIL 6 AM CST MONDAY FOR NEZ013-014.
WIND ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR NEZ013-014.
DISCUSSION...08
AVIATION...SG
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