Marine Weather and Tide Forecast for Nunn, CO

DISCUSSION /Through Sunday/
Issued at 1157 PM MDT Sun Jun 14 2026

A building upper-level ridge over the western CONUS will be the main driving force for this week's forecast. This will put northwesterly flow aloft over Colorado as we reside on its eastern flank. A relatively hot and dry week is expected with a few cold fronts to bring brief relief from the heat, mixed in with multiple 90 degree days.

Today will initiate the warmup as 700 mb temps increase to around 15C, bringing surface temperatures back into the 80s across the plains, 60s and 70s for the mountain valleys. Ensembles indicate a significant drop in PWAT, with just enough moisture remaining along the Palmer Divide (PWATs around 120% of normal) to keep a few PoPs in the forecast in this location for this afternoon, but that will be it for precipitation chances through at least Friday.

The main weather concerns for Tuesday and Wednesday still continue to be for fire weather. Winds and heat will increase on Tuesday that will bring 90s back to much of the lower elevations and breezy conditions are expected across the mountain valleys and northern Larimer and Weld Counties. Gusts between 30-40 mph will be possible in these areas where relative humidity is expected to drop into the low to mid teens, but with greenup still underway in these zones, this is looking like an elevated fire weather day. On Wednesday, an 80kt, 500mb jet will position itself just north of Colorado, in the northwesterly flow aloft. This will lead to increasing winds and adiabatic warming and drying across the forecast area. Very dry, hot, and breezy conditions are expected to develop along the urban corridor and adjacent plains, but the extent of how far east these conditions prevail depends on the timing of a cold front. At this time, it still looks like we will have critical fire weather conditions for areas along the urban corridor and adjacent plains where fuels are considered critical, as relative humidity in the single digits coinciding with 30 to 40mph winds is expected. The latest forecast has shown the cold front progressing slightly sooner across the plains, and if this continues to speed up, this would certainly limit fire weather concerns for some of our eastern zones. Will have to monitor the timing to determine where highlights will be needed, but we do anticipate some areas needing highlights in the next forecast package or two.

Thursday will be one of the aforementioned "relief" days as temperatures drop to near-normal behind Wednesday's front.
Expecting winds to decrease as the jet moves east, and mostly sunny skies should prevail as the ridge also nudges eastward.

Afternoon highs are forecast to heat back up into the 90s on Friday and Saturday before another cold front is expected to bring some more relief for Sunday. PoPs start to enter the forecast for the weekend, and with ensembles showing PWATs increase to around 120-130% of normal for this period with the ridge looking to break down, this doesn't seem unreasonable this far out.



AVIATION /06Z TAFS through 06Z Tuesday/
Issued at 1122 PM MDT Sun Jun 14 2026

Upslope winds have continued to keep stratus in place across the TAF sites late tonight. Winds are expected to transition to a more southerly component in the next few hours, between 7Z-8Z, that will start to breakup the lower CIGs and bring significant improvements, likely scattering out fairly quickly after the winds shift. VFR conditions are expected to then prevail through the rest of the TAF period. Winds are expected to become light and variable between 12Z-14Z before settling into a northeasterly flow by 18Z through the afternoon and early evening.

BOU WATCHES/WARNINGS/ADVISORIES
None.