Marine Weather and Tide Forecast for Bellevue, ID

DISCUSSION
Issued at 202 AM MDT Mon Aug 3 2026

Smoke continues to be the main impact across Eastern Idaho to start the new week. The weak trough passing through Montana early this morning will bring a drop in our temperatures, but will also continue bringing breezy winds through the morning hours. Wind gusts through the morning stay around 15 to 20 mph with gusts to 25 mph through parts of the eastern Magic Valley and upper Snake River Plain. Winds begin to drop off during the afternoon and will be light overnight into Tuesday morning. While patchy smoke will persist throughout today, we will likely see an increase in smoke impacts overnight into Tuesday morning as winds get even lighter and particles are able to settle out of the atmosphere a bit more. Highs today will be in the upper 70s to low 80s across much of the area, a cool down behind the weak cold front passing through, and this "cooler" weather will continue on Tuesday, but highs will be back into the upper 80s and low 90s by Wednesday afternoon. The ridge of high pressure builds in over the West again in the second half of the weekend which means highs will be back into the 90s and low triple digits by Friday. There is basically zero precipitation in the forecast this week, with hot, dry, breezy conditions continuing to bring near-critical fire weather conditions to the area throughout the week.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/
Issued at 512 AM MDT Mon Aug 3 2026

Winds remain a bit elevated early this morning with gusts around 20 to 25 kts at PIH and BYI. Expect winds to diminish throughout the day, especially overnight into Tuesday. VFR conditions continue for the better part of today and HRRR smoke model forecast has backed off on VIS impacts at our TAF sites for today. Have gone with 6SM FU in TAFs for most sites. Impacts look more likely to increase on Tuesday morning just after the end of this TAF period, in part thanks to light and variable winds, so look for drops in VIS to 5SM FU with next issuance. This will be most likely at BYI.

FIRE WEATHER
Issued at 203 AM MDT Mon Aug 3 2026

The overall forecast won't change much throughout the week ahead. A weak trough moving through Montana today will help keep our temperatures a bit cooler, in the low 80s, but breezy conditions continue this morning. Winds will be much lighter overnight into Tuesday. The "cooler" temperatures continue on Tuesday with wind gusts in the afternoon around 20 to 25 mph and min RHs still very dry, generally ranging from 10 to 20 percent across Eastern Idaho.
Temperatures will gradually warm throughout the second half of the week as a ridge of high pressure builds back in over the West with min RHs each day staying below 20 percent. Overnight recovery will look like RHs of 30 to 50 percent for most. Overall, expect near- critical fire weather conditions throughout much of this week with no precipitation.

AIR QUALITY
Issued at 203 AM MDT Mon Aug 3 2026

An air quality alert continues for Caribou, Oneida, Bingham, Bannock and Power Counties through Tuesday due to impacts from wildfire smoke. Air quality is expected to remain "unhealthy for sensitive groups" through Wednesday.

PIH WATCHES/WARNINGS/ADVISORIES
Air Quality Alert until 3 PM MDT Tuesday for IDZ052-054-055- 057>059-062-063.