546
FXUS65 KBOU 301139
AFDBOU
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
539 AM MDT THU OCT 30 2025
KEY MESSAGES
- NO PRECIPITATION EXPECTED THROUGH THE NEXT 7 DAYS.
- REMAINING COOL THROUGH FRIDAY, WHEN THE MOUNTAINS WILL SEE
BREEZY CONDITIONS. MILDER WEATHER ARRIVES THIS WEEKEND.
DISCUSSION /THROUGH WEDNESDAY/
ISSUED AT 115 PM MDT WED OCT 29 2025
AFTER OUR COLDEST MORNING OF THE SEASON FOR THE LOWLANDS EAST OF
THE MOUNTAINS, TEMPERATURES HAVE ACTUALLY WARMED QUITE NICELY,
EVEN BREAKING THE 60F MARK LOCALLY ACROSS THE PALMER DIVIDE WHERE
THE MORNING INVERSION CLEARED EARLIEST.
HIGHER PRESSURE WILL GRADUALLY EXPAND EASTWARD OVER THE COMING
DAYS, EVENTUALLY PRODUCING A WARMING TREND, BUT NOT BEFORE A
COUPLE MORE DAYS OF RELATIVELY COOL FALL WEATHER. AS THE DOMINANT
LOW PRESSURE AREA TO OUR EAST LIFTS OVER THE APPALACHIANS, A
DISSIPATING SHORTWAVE EMBEDDED IN THE NORTHWEST FLOW ALOFT WILL
DRIVE A WEAK FRONTAL BOUNDARY THROUGH NORTHEAST COLORADO THURSDAY
MORNING. MOISTURE WITH THIS FEATURE WILL BE INCONSEQUENTIAL, WITH
THE MAIN IMPACT BEING SUSTAIN COOLER-THAN-AVERAGE HIGHS (50'S FOR
THE LOWER ELEVATIONS) AND SOME BREEZY NORTH WINDS IN THE PLAINS,
SUBSIDING SOME THROUGH THE AFTERNOON. LINGERING NORTHEAST SURFACE
FLOW AND A MODERATE INCREASE IN CLOUD COVER WILL KEEP TEMPERATURES
COOL ON FRIDAY, EVEN A DEGREE OR TWO LOWER THAN THURSDAY. WINDS
ACROSS OUR MOUNTAIN ZONES WILL ALSO PICK UP FRIDAY, AS A NORTH-
SOUTH ORIENTED JET ZIPS PAST ALONG THE WESTERN PERIPHERY OF AN
AMPLIFYING TROUGH, PRODUCING GUSTS 35-55 MPH OVER THE MOUNTAIN
PEAKS.
TEMPERATURES WILL REBOUND CLOSER TO SEASONAL NORMALS FOR SATURDAY
AS A POSITIVELY-TILTED RIDGE NUDGES INTO THE REGION, ALTHOUGH THE
MILDER CONDITIONS LOOK TO PEAK SUNDAY AS THE RIDGE AXIS TRAVERSES
OVERHEAD AND SUBSIDENCE PREVAILS. THE PLAINS AND URBAN CORRIDOR
SHOULD EASILY REACH THE LOWER TO MID 70'S, WITH EVEN A FEW 60'S
POTENTIALLY CREEPING IN FOR OUR WARMEST MOUNTAIN COMMUNITIES.
EARLIER GUIDANCE OVER THE PAST FEW DAYS HAD INDICATED THE PASSAGE
OF A WEAKER SHORTWAVE FOR MONDAY, MAINLY PRODUCING A NOTABLE
COOLDOWN. THE MOST RECENT GUIDANCE HAS GENERALLY TRENDED AWAY FROM
THAT AND INSTEAD FAVORS A MORE ZONAL FLOW PATTERN, WHICH BY ITSELF
WOULDN'T BE ENOUGH TO WARRANT SUBSTANTIALLY COOLER CONDITIONS.
THUS, HAVE TRENDED THE FORECAST CLOSER TO MOS GUIDANCE FOR EARLY
NEXT WEEK TO TAPER THE TEMPERATURE CHANGE, AND AWAY FROM THE NBM
WHICH SEEMS A LITTLE CLOSER TO CATCH ON. REGARDLESS, THE FORECAST
STILL REMAINS DRY THROUGH THE FULL 7-DAY FORECAST PERIOD.
AVIATION /12Z TAFS THROUGH 12Z FRIDAY/
ISSUED AT 537 AM MDT THU OCT 30 2025
VFR CONDITIONS EXPECTED THROUGHOUT THE TAF PERIOD. A COLD FRONT
HAS MOVED THROUGH THE TERMINALS THIS MORNING WITH GUSTY NORTHEAST
WINDS. WINDS WILL WEAKEN AROUND 15Z AND WILL LIKELY SHIFT TO THE
NORTHWEST. FROM AROUND MIDDAY THROUGH THE AFTERNOON, LIGHT
NORTHEAST TO EAST WINDS WILL BE PERSISTENT.
TONIGHT, DRAINAGE WINDS WILL DEVELOP IN THE LATE EVENING. WINDS
WILL STAY LIGHT TOMORROW.
BOU WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION...BRQ
AVIATION...DANIELSON
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