Weather forecasts and analysis for the greater Denver area. Javascript, maps, weather. @weather5280
Denver
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Biggest snow on this date: 11.8 inches in 1997
On Oct 24–25 in 1997, Denver got 21.9 inches of snow over two days, 11.8 inches of it on this date (records since 1921). This year's first measurable snow is now overdue against the Oct 19 aver anecast.app/for/denver-co #cowx
Brendan Heberton retweeted
Ten inches of snow fell on Oct 23, 1942
On Oct 23 in 1942, Denver got 10.2 inches of snow, the most for this week of the year on the record. This year's first measurable snow still hasn't come, and the week ahead turns cooler. anecast.app/for/denver-co #cowx
First freeze of the season likely tonight
Denver's forecast low is near 31° tonight as skies clear behind the departing storm, and a Freeze Watch holds until 9 AM Friday. Cover tender plants and protect outdoor plumbing before dark. anecast.app/for/denver-co #cowx
Today's high near 49°, 17 degrees below average
Denver should top out near 49° today in steady showers, about 17 degrees below the 66.3° average for the date. That snaps a warm run: the last seven days averaged more than 13 degrees above norm anecast.app/for/denver-co #cowx
Tuesday's 0.1 inches of rain ended the dry spell
Tuesday's 0.1 inches of rain finally broke Denver's dry run, but October still sits 0.35 inches behind normal and today's soaking has ground to make up. After a week that averaged 13 degrees anecast.app/for/denver-co #cowx
finally a cooldown denver? anecast.app/for/denver-co
The evening edition! anecast.app/
Brendan Heberton retweeted
Here it is: My big October update on the now near-record/record-strength El Niño event and the still-increasing likelihood of significant California impacts this winter. This deep-dive post is meant to accompany my Tuesday 1pm PT livestream. weatherwest.com/archives/441…
A new homepage for @anecast_app today: anecast.app/ Adding more cities as well – have one for me to add today? #weather
Brendan Heberton retweeted
Columbus Day within reach of 1938's record
Monday should reach 85 in Chicago, up from 80 in yesterday's forecast, as a ridge builds overhead and lows stay near 60. That would sit just shy of a record-warm stretch for mid-October, with the d anecast.app/for/chicago-il #ilwx
Hey Denver friends, messing around with a new project here — would love your feedback as it progresses, and if you want a quick weather update in your morning inbox, please subscribe! anecast.app/for/denver-co #cowx
Monday's middle-of-the-road call is up to 77 from 74, with rain odds down to 5% from 17%. The fork hasn't narrowed, though: runs still stretch from 54 to 88, hinging on whether a backdoor front shows up or warm southerly flow holds. anecast.app/for/denver-co #cowx via @anecast_app
Brendan Heberton retweeted
Just did some number crunching using latest (Oct 1) ECMWF seasonal data, and I must say that I've never seen such high predictive confidence in a very wet California winter. This is a truly extraordinary forecast amid a record-strength El Niño event. [Thread: please read to end.]
ALT Model-relative sea surface temperature anomalies for November 2026–January 2027. The supplied grid is displayed without added smoothing or coastal filling. Beige marks land and gray marks missing ocean values. The main colour scale spans -2 to +10°F, with white at zero. Hot pink marks anomalies above +10°F. This map does not establish an operational ENSO category.
Tonight's low near 58 would top the warmest low on record for the date, 55F from 1947 anecast.app/for/denver-co #cowx -- yikes, true story? #denver
Brendan Heberton retweeted
Number of 80°+ days in March in Denver:
1972-2025: 7 days
2026: 8 days
#COwx
A Winter Weather Advisory starts tonight for the area, with 3–5 inches expected in the Denver metro area and Palmer Divide; heavier snow is possible in the foothills and higher elevations. The snowiest day on record for this date is 4.5” (1932).
anecast.ai/for/denver-colora… #cowx
Can someone please ask anecast a question? anecast.ai/ #weather
Denver forecast looks nice and toasty once again on Friday: anecast.ai/for/denver-colora… #cowx