textproduct: Pocatello

KEY MESSAGES

- Heat expected through the weekend with many locations nearing or reaching 100 degrees Saturday and Sunday. Heat Advisories and Excessive Heat Warnings have been issued for many areas Saturday through Monday. - Drier weather expected over the weekend into early next week. Red Flag Warnings in effect for the central mountains Saturday.

DISCUSSION

Issued at 1242 PM MDT Fri Jul 10 2026

A weak shortwave will keep a slight chance of isolated to widely scattered thunderstorms in the forecast today across Southeast Idaho. Dry conditions across the lower layers of the atmosphere will mean thunderstorms will generally be of the dry variety today with ensembles showing PWATs less than 0.5". Outflow winds will most frequently range 40 to 50 mph.

A ridge of high pressure will build over the Southwest this weekend, which will support above-normal warmth and heat risk throughout the weekend timeframe. Temperatures today will warm into the 90s across the lower elevations with 80s in the mid-elevations and mountain valleys. A warming trend will persist through Sunday with a several degree warm up each day. On Saturday, valley locations in south- central Idaho will begin to break triple digits and by Sunday, even the Upper Snake River Plain will break 100 degrees with widespread upper-90s to low 100s. HEAT ADVISORIES and EXTREME HEAT WARNINGS remain in effect across Southeast Idaho beginning Saturday afternoon but have been extended to continue through Monday evening. Overnight lows each night will range the upper 50s to low 60s with more widespread 60s come Sunday night. On Monday, temperatures will run within a couple degrees of Sunday's highs with valleys still warming into triple digits. Vulnerable populations or anyone exposed to the elements for long periods of time could experience heat-related illness if precautions aren't taken. A Pacific trough moving onshore early next week will shift the area of high pressure slightly further east for the remainder of next week. This will mean fairly stable temperatures in the 90s for low elevation areas each afternoon.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 1133 AM MDT Fri Jul 10 2026

VFR conditions forecast with winds generally under 10 to 12 kts. Potential impact is the slight chance for isolated, dry thunderstorms during the afternoon as a weak shortwave works through. Have included PROB30s at all terminals aside from KSUN, which is further northwest of the expected corridors of activity. Storms will be capable of gusty outflow winds with the strongest reaching 50 mph.

FIRE WEATHER

Issued at 1224 PM MDT Fri Jul 10 2026

Main impacts will be very dry conditions as well as extremely hot with strong winds. A Red Flag Warning has been issued for zoned 475 and 476 on Saturday afternoon for low humidity and gusty winds and more will likely be issued for Sunday with zones 475, 476, 410 and 411 the most likely to see the dry and windy conditions. It will be hot through the next 7 days with the next potential for showers and thunderstorms after today on Tuesday and continuing through the rest of next week.

PIH WATCHES/WARNINGS/ADVISORIES

Heat Advisory from noon Saturday to 9 PM MDT Monday for IDZ051>055-060>068-070-075. Extreme Heat Warning from noon Saturday to 9 PM MDT Monday for IDZ056>059. Red Flag Warning from 1 PM to 9 PM MDT Saturday for IDZ475-476.