Longmont, Colorado 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

551
FXUS65 KBOU 051130
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
530 AM MDT Sun Apr 5 2026

.KEY MESSAGES...

- Dry through Monday with a chance of light showers late day
  Tuesday and Wednesday.

- Elevated to critical fire weather conditions over the plains
  Wednesday afternoon.

- Unsettled weather pattern Friday through Monday.

&&

.DISCUSSION /Through Saturday/...
Issued at 1126 PM MDT Sat Apr 4 2026

Skies are clear across the forecast area at this time.  Winds are
mainly light from the south and southeast across the plains with
temperatures in the mid 30s to lower 40s.

Upper ridging aloft west of Colorado is progged to push slowly
eastward through Sunday on into the CWA by Monday morning as it
flattens out. Weak west-northwesterly flow aloft is expected over
the CWA tonight through Tuesday. Upper troughing is progged to
move in late Tuesday into Wednesday with increasing west-
northwesterly flow aloft. This will bring a cold front across the
plains Tuesday night.

The QG Omega fields show benign synoptic scale energy over the
forecast area from now through Tuesday night, with some upward
energy progged late Tuesday night and Wednesday.

Moisture is sparse for the CWA overnight tonight through Monday with
just some upper level cloudiness here and there. Cross sections
show moisture deepening somewhat Monday night and Tuesday. There
may be enough instability around later Monday, Tuesday and late
day Wednesday to warrant a 20-50% chance of showers. Chances will
be highest in the mountains. Significant precipitation is not
expected.

Humidity levels will drop into the 12-20 percent range Wednesday
afternoon.  Winds gust speeds will be around 20 knots so elevated to
near critical fire weather conditions are expected for a few hours
mainly over the plains.

Temperatures look to be running a bit above normals Sunday through
Tuesday, with highs in the 60s over the plains all three days.
Wednesday`s highs could be a tad more than 10 degrees above seasonal
normals reaching the lower 70s on the plains.

For the later periods, Thursday through Sunday, southwesterly
flow aloft is progged on Friday through Sunday with upper troughing
in play for Monday. Confidence is low by the end of the period with
various medium range models in poor agreement.

&&

.AVIATION /12Z TAFS through 12Z Monday/...
Issued at 529 AM MDT Sun Apr 5 2026

VFR through the TAF period with light winds. Weak drainage flow
should gradually turn towards an easterly component later this
morning or early in the afternoon, then slowly turn back to
drainage this evening. Wind speeds are expected to remain under
10kt. No ceiling or visibility concerns are anticipated.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...66
AVIATION...Hiris