The National Weather Service in Salt Lake City issued several flood watches for southern and southwest Utah on Thursday, July 16, 2026, warning of a continuous monsoon surge that brings the threat of heavy rainfall and flash flooding through the weekend and into early next week.
Monsoon Surge and Flood Watches
According to an area forecast discussion released by the National Weather and Service on July 16, a significant monsoon surge is currently moving across the region. This weather pattern is expected to maintain a high threat of thunderstorms capable of producing heavy rainfall across southern Utah through at least early next week.
A Flood Watch was already in effect for much of southern Utah for Thursday afternoon and evening. The agency also issued a new Flood Watch specifically for southwest and south central Utah, covering the period from Friday afternoon through Friday evening.
High Moisture and Rainfall Potential
Meteorologists noted that moisture levels in the region are exceptionally high. Precipitable water values have already exceeded the 98th percentile across many locations in southern Utah. Extended ensemble modeling suggests these high moisture levels will remain above the 90th percentile through at least next Thursday.
The National Weather Service indicated that while there was no obvious source of lift from a shortwave trough on Thursday, convection is expected to continue developing across higher terrain through the early afternoon. Due to specific environmental parameters regarding cold pool and shear balance, forecasters expect slow-moving convection that could shift very heavy rainfall into adjacent valleys where higher instability is available.
Forecast for Friday and Weekend
The weather pattern for Friday is expected to mirror the conditions seen on Thursday. The National Weather Service described the outlook for southwest and south central Utah as a 'rinse and repeat' scenario, with little change in environmental conditions likely to yield another round of high flash flooding probabilities during the Friday afternoon and evening hours.
Forecasters warned that additional Flood Watches might be necessary for Saturday if the current pattern persists. As of the Thursday evening update, there was no significant change predicted for the monsoon surge heading into the weekend, though officials will continue to monitor for any expansion of flood watches.
Warnings for Recreationists and Burn Scars
The National Weather Service issued a specific warning for outdoor enthusiasts regarding the current weather risks. The agency stated that this is not the time for outdoor recreationists to plan hikes into or near slot canyons, normally dry washes, or slick rock areas.
Furthermore, residents and travelers near recent burn scars—specifically Cottonwood, Monroe Canyon, France Canyon, and Forsyth—were advised to continue monitoring for potential warnings. The agency urged those in these areas to have a prepared plan in place should a warning be issued.
Fire Weather and Humidity Changes
The monsoon surge is also impacting fire weather conditions across the state. While much of southern and portions of eastern Utah face the threat of heavy rainfall, areas further removed from the surge in northern and west central Utah may see less thunderstorm coverage in valley locations.
Humidity levels are expected to shift slightly over the weekend. In northern and western valleys, humidities currently in the 20-30% range are projected to increase to approximately 30-40% during the weekend period.
Aviation and Regional Wind Impacts
Aviation impacts were also noted in the forecast discussion. In the vicinity of Salt Lake City, showers and thunderstorms may produce variable winds at the terminal between 01:00 and 03:00 UTC, with a higher probability of southerly winds around 02:00 UTC accompanied by periods of gustiness.
For the rest of Utah and southwest Wyoming, showers and thunderstorms are expected to diminish at northern terminals before midnight. However, the southern terminals may experience a greater chance of late evening storms, which could bring erratic and gusty winds through the early morning hours.
Ongoing Monitoring
The National Weather Service continues to monitor the monsoon surge for any changes in the flood watch boundaries. As of the July 16 update, the Flood Watch for southern Utah was set to remain in effect until midnight MDT that night, while the Friday afternoon and evening watches remained active for southwest and south central regions.
