textproduct: Bismarck

KEY MESSAGES

- Above average temperatures continue today followed by slightly below average temperatures to end the week.

- A few areas of frost possible tonight into Thursday morning, mainly in the north. A larger area of frost may come Thursday night into Friday morning. - An overall mainly dry pattern is expected through the rest of the week with low to medium chances in the southwest Thursday. Low to medium chances may return Friday night into Saturday.

UPDATE

Issued at 1150 AM CDT Wed Sep 30 2026

Limited updates needed at this time. Updated Aviation Discussion for the 18z TAF issuance.

UPDATE Issued at 845 AM CDT Wed Sep 30 2026

Mostly clear skies this morning with some passing high clouds. High temperatures today will be in the 60s to mid 70s with northwest winds 15 to 20 mph gusting to 30 mph this afternoon. Otherwise, no updates at this time, forecast remains on track.

UPDATE Issued at 635 AM CDT Wed Sep 30 2026

Limited updates needed this morning as the forecast remains on track. Mainly updated Aviation Discussion for the 12z TAF issuance.

DISCUSSION

Issued at 340 AM CDT Wed Sep 30 2026

A passing clipper system in Canada will bring a weak yet mainly dry cold front across the forecast area today. Look for some breezy northwest winds as a result. Some cooler temperatures in the 60s will be found in the north behind this front today, with 70s elsewhere ahead of this front. As mentioned this front is expected to be mainly dry. There could be a few showers near the international border, yet confidence was too low to include at this time. Surface high will fully push this cold front through tonight. Look for cooler lows in the mid 30s to mid 40s tonight as a result. Perhaps some areas of frost are possible, especially in the north. Surface high then settles in for Thursday, with the cold front creating a stalled boundary in the southwest. A few showers are possible along this southwestern boundary, although there is an abundance of dry air these showers would have to go through. For now have low to medium pops to account for this potential. Otherwise look for cooler temperatures on Thursday with highs in the mid 50s to mid 60s, and less breezy northwest winds. Surface high moves more over central ND Thursday night into Friday morning. The mentioned boundary could still remained stalled in the southwest, perhaps lingering low chances for showers. With this high will be cooler temperatures Thursday night into Friday morning with lows forecast in the 30s to lower 40s. This could bring more widespread frost conditions. The surface high moves out of the state on Friday, switching the flow aloft to the southwest. Developing surface front to our west will also bring a breezy southerly flow for Friday. As a result and elevated warm front looks to move through Friday, followed by a weak clipper system Friday night. Low to medium chances for showers could be found from either of these features. Temperatures could warm slightly, yet overall remain in the 60s for highs. Cloudy conditions could also bring slightly warmer temperatures Friday night into Saturday morning, with lows forecast in the mid 30s to mid 40s.

Some lingering showers could be found Saturday morning as the mentioned clipper system moves through. The rest of Saturday then looks near seasonable with highs in the 60s. Some breezy northwest winds could also be found for Saturday. Lows in the 30s could return Saturday night into Sunday morning, with high pressure keeping conditions dry. This high also looks to keep conditions dry for Sunday, while temperatures remain about the same with highs in the 60s. Zonal flow for early next week could bring weak disturbances and low pops at times to start next week. This westerly flow could also bring some warming temperatures, with forecast highs currently in the mid 60s to mid 70s Monday and Tuesday. Milder morning lows would also be found with this pattern. An increased gradient at the surface could also bring some breezy southerly winds on Monday.

AVIATION /18Z TAFS THROUGH 18Z THURSDAY/

Issued at 1150 AM CDT Wed Sep 30 2026

VFR conditions are expected through the forecast period. Mid to upper level clouds may be found at times, with dry conditions expected. A breezy west northwest wind may return this afternoon and tomorrow afternoon, otherwise look for generally light winds through the forecast period.

BIS WATCHES/WARNINGS/ADVISORIES

None.