809
FXUS63 KDMX 152336
AFDDMX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
536 PM CST SUN FEB 15 2026
...UPDATED FOR THE 00Z AVIATION DISCUSSION...
KEY MESSAGES
- FAIR, MILD WEATHER FOR THE REST OF SUNDAY. HIGHS IN THE LOW TO
MID 60S.
- CLOUDS INCREASING MONDAY AND TUESDAY, BUT WITH TEMPERATURES
STILL WELL ABOVE AVERAGE. HIGHS IN THE SOUTHWEST IOWA COULD
REACH 70 DEGREES TUESDAY.
- SHOWERS AND A FEW THUNDERSTORMS POSSIBLE TUESDAY NIGHT, MAINLY
NORTH.
DISCUSSION
ISSUED AT 246 PM CST SUN FEB 15 2026
MOSTLY SUNNY SKIES AND LIGHT WINDS MADE FOR A PLEASANT SUNDAY ACROSS
THE STATE. SATELLITE IMAGERY SHOWS AN AREA OF STRATUS/FOG IN NORTH-
CENTRAL KANSAS. THIS REPRESENTS WHERE OUR MOISTURE PLUME IS, AND IT
WILL BE ADVECTED IN ON THE LLJ TONIGHT. THE SURFACE WARM FRONT WILL
BRING IN A BLANKET OF STRATUS AND ACCOMPANYING FOG, STALLING
SOMEWHERE ACROSS THE CENTRAL OR NORTH MONDAY INTO TUESDAY. BOTH FOG
AND CLOUDS COULD BE A FEATURE THROUGHOUT THE DAY. IN THE WARM
SECTOR, THE LLJ WIND MAX CONTINUES THROUGH THE DAY IN MISSOURI,
PRIMED FOR AN ADDITIONAL PUSH OF MOISTURE AND STRATUS IN THE
EVENING AND OVERNIGHT. THE MOST NOTICEABLE CHANGE IS TO THE
HIGH TEMPERATURES, ESPECIALLY IN THE NORTH WITH THE WARM FRONT.
SIMILAR ADJUSTMENTS MAY BE NEEDED ON TUESDAY DEPENDING ON WHERE
THE WARM FRONT LIES THEN.
EVENTUALLY, THE WARM FRONT WILL BE PICKED UP BY A SURFACE LOW
ASSOCIATED WITH A NEGATIVELY-TILTED SHORTWAVE TROUGH EJECTING FROM
THE NORTHERN ROCKIES. WINDS WILL INCREASE AS THE PRESSURE GRADIENT
INCREASES, LEADING TO GUSTY WINDS, ESPECIALLY ACROSS THE SOUTH. DEW
POINTS IN THE NBM ARE LIKELY RUNNING TOO HIGH IN THE SOUTH TUESDAY,
WHERE SOME CLEARING MAY ALLOW FOR BETTER MIXING AND DECREASING DEW
POINTS. THIS IS WHEN AND WHERE THE CHANCES FOR ELEVATED FIRE WEATHER
CONDITIONS ARE GREATEST. THE EML WILL REACH INTO IOWA, STEEPENING
MIDLEVEL LAPSE RATES. A TREND THIS FORECAST ISSUANCE WAS A DELAY IN
THE OCCLUSION MENTIONED YESTERDAY, LEADING TO AN UPTICK IN
PRECIPITATION FOR PORTIONS OF CENTRAL IOWA. THUNDERSTORMS WILL BE
POSSIBLE GIVEN THE MIDLEVEL LAPSE RATES RANGING FROM 7 TO 8 C/KM.
DEPENDING ON AVAILABLE BOUNDARY LAYER MOISTURE, THERE COULD BE MORE
CAPE AVAILABLE, INCREASING THE CHANCE OF THUNDERSTORMS. THE SPC HAS
A GENERAL THUNDER OUTLOOK FOR MOST ALL OF IOWA.
A PATTERN CHANGE ARRIVES BEHIND TUESDAY NIGHT'S SYSTEM. BROAD
TROUGHING IN THE WESTERN CONUS WILL USHER IN COOLER AIR IN THE
PLAINS, DROPPING TEMPERATURES CLOSER TO NORMAL FOR MID FEBRUARY. LEE-
SIDE TROUGHING IS FAVORED IN THIS PATTERN, INDICATING AN ACTIVE
PATTERN. PRECIPITATION WILL BE POSSIBLE TO END THE WORK WEEK (30-40%
CHANCE ON THURSDAY AND FRIDAY).
AVIATION /00Z TAFS THROUGH 00Z TUESDAY/
ISSUED AT 536 PM CST SUN FEB 15 2026
VFR CONDITIONS WILL PREVAIL FOR MOST OF TONIGHT. THERE IS SOME
POTENTIAL FOR LIGHT FOG FORMATION LATE, MORE TOWARD MONDAY
MORNING AROUND 12-14Z AND MAINLY AT THE NORTHERN TERMINALS. EVEN
THEN, CONFIDENCE IS LESS THAN 50%, SO HAVE ADVERTISED 6SM BR IN
THE TAFS AND WILL MONITOR TRENDS OVERNIGHT. A PERIOD OF LLWS
WILL ALSO TRANSLATE ACROSS THE AREA AS WINDS ALOFT VEER AND
INCREASE LATE TONIGHT INTO EARLY MONDAY MORNING, THEN EASE AGAIN
DURING THE DAY ON MONDAY.
CLIMATE
ISSUED AT 536 PM CST SUN FEB 15 2026
FORECAST AND RECORD HIGH TEMPERATURES FOR SELECT CENTRAL IOWA
CITIES ON MONDAY, FEBRUARY 16...
===========================================
| MONDAY | PERIOD
| FCST RECORD/ | OF
CITY | HIGH YEAR | RECORD
===========================================
MASON CITY 57 63/1981 1903-PRESENT
WATERLOO 61 62/1981 1895-PRESENT
DES MOINES 65 66/1981 1878-PRESENT
OTTUMWA 66 65/2017 1923-PRESENT
===========================================
DMX WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION...JIMENEZ
AVIATION...LEE
CLIMATE...LEE
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