Marine Weather and Tide Forecast for Nevada, IA

SHORT TERM /THROUGH TUESDAY NIGHT/
Issued at 256 AM CDT Mon Mar 9 2026

Some gusts were able to punch through the inversion this morning with sporadic gusts to around 30mph found at times across the area. A weak boundary can be seen upstream with a thin pocket of stratus accompanying it. Stratus should succumb to the dry air over Iowa today, but the boundary will stall over Iowa. South of the boundary, have gone slightly above guidance for highs due to the dryness, with highs in the 70s. North of the boundary, highs again face challenges from clouds, but should still reach the 60s this afternoon. The lack of winds will mitigate fire weather concerns, but conditions will dry out fuels for later.

Similar to yesterday's discussion regarding Tuesday, guidance has trended towards a solution of a delayed phase for the southern and northern upper air disturbances. Confidence in surface-based storms coming into the southeast part of the CWA is decreasing, namely because the warm front may not traverse this far north. Still, some elevated thunderstorms could leak north of the boundary as MUCAPE values on the order of 600 J/kg exist where the low-level theta-e push threatens the hold of the cap. This leaves at least a threat for hail on the table.

LONG TERM /WEDNESDAY THROUGH SUNDAY/
Issued at 256 AM CDT Mon Mar 9 2026

Strong cold air advection behind the front brings temperatures down 15-20 degrees on Wednesday. Winds will be breezy out of the northwest with the cold air advection, subsidence, and enhanced pressure gradient across the area. Model soundings indicate 35-40+ kts at the top of the mixed layer, translating down to 30+ mph gusts possible at times on Wednesday.

The extended remains active with a shortwave passing north of the area on Thursday into Friday. Initially, return southerly flow ahead of the shortwave will allow temperatures to warm several degrees on Thursday. Expect breezy southwesterly flow as the pressure gradient tightens ahead of the approaching wave. Soundings are alos fairly dry with deep mixing and gusts of 40+ kts through the top of the mixed layer. Even surface winds remain strong at 20-25+ kts. With dry air in place head of the front, will need to monitor for fire weather concerns. Later Thursday precipitation skims northern into eastern Iowa, though the main axis will be outside of the area. This lifts east by Friday with the cold front sagging south across the area through the day.

Another shortwave may influence the area by this weekend. Models are in agreement with precipitation spreading across the area on Saturday on the north side of a weak surface low across the central US. An incoming shortwave deepens across the Rockies and enhances the existing low, increasing precipitation into Sunday.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
Issued at 1230 PM CDT Mon Mar 9 2026

A boundary is moving slowly south across Iowa this afternoon and is expected to stall over central Iowa. The boundary will bring erratic wind direction to KDSM/KALO at times this afternoon.
Still monitoring the potential for MVFR or lower stratus on Tuesday morning. At this time, the greatest potential is at KOTM but all sites may be impacted prior to 18z Tue.

DMX WATCHES/WARNINGS/ADVISORIES
None.