Summary:
Heavy rain showers and thunderstorms, some severe, will persist across the Plains and Mississippi Valley through Friday. Increasing tropical moisture from the remnants of Mario will bring showers, thunderstorms, and a flash flooding threat across much of southern California into the Desert Southwest through Friday
Impacted Lanes: I-5, I-90, I-40
New Mexico
Flood Watch remains in effect until 9/19/25 night.
- Flash flooding caused by thunderstorms.
- Impacts: Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.
Flash Flood Warning remains in effect until 9/19/25 night.
- Life threatening flash flooding.
Nevada
Flash Flood Warning remains in effect until 9/19/25 night.
- Life threatening flash flooding.
California
Flood Watch remains in effect until further notice.
- Flooding caused by excessive rainfall continues to be possible.
- Impacts: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-laying and flood-prone locations
Arizona
Flood Watch remains in effect until further notice.
- Minor flooding is occurring and minor flooding is forecast.
Additional Dense Fog Advisories include but are not limited to: Montana, North Carolina, and Maryland
Additional Flood Advisory includes Oklahoma and North Dakota.