New Mexico Faces Multi-Day Flood Threat from Heavy Rain

Flood Watches are in effect across much of New Mexico on September 22, 2026. A multi-day surge of tropical and monsoon moisture is forecast to produce repeated rounds of heavy rain and thunderstorms through at least September 24, according to the Weather Prediction Center (WPC). The WPC placed portions of southern New Mexico under a Moderate Risk of excessive rainfall, level 3 out of 4, for the initial 24-hour period. This risk is expected to shift into parts of eastern New Mexico the following day.

An approaching upper-level trough and deep southerly tropical moisture are driving the event. In southern New Mexico, an early-season backdoor cool front will increase low-level convergence, supporting repeated thunderstorms capable of heavy rainfall.

The National Weather Service (NWS) office in Albuquerque forecasts widespread multi-day rainfall totals of 76 to 102 mm (3 to 4 inches) from the Ruidoso area north toward Clayton. Localized totals around 127 mm (5 inches) are possible in east-central New Mexico. In an upper-end scenario, there is a 10% probability of approximately 152 to 203 mm (6 to 8 inches) at some locations along and east of the central mountain chain.

Widespread Flood Watches Issued

Multiple NWS offices have issued and expanded Flood Watches. NWS Albuquerque expanded its watch early on September 22, adding numerous forecast zones. The watch is in effect from September 22 until the afternoon of September 23. The expanded area includes the Northwest Plateau, Chuska Mountains, and Upper Rio Grande Valley, among many others. The previously covered area includes the Albuquerque and Santa Fe metropolitan areas, the Middle and Lower Rio Grande valleys, and the Sangre de Cristo Mountains.

NWS Albuquerque forecasts widespread heavy rainfall on Tuesday and Wednesday, with scattered flash flooding likely. Some rivers and tributaries could flood as rainfall accumulates. By Wednesday afternoon, rainfall is forecast to exceed 38 mm (1.5 inches) in many areas east of the central mountains and 25 mm (1 inch) in many western locations. Stronger storms could produce rainfall rates exceeding 51 mm per hour (2 inches per hour).

Complex terrain, areas below recent burn scars, dry arroyos, and urban areas are particularly vulnerable to rapid runoff. Heavy rain is forecast to continue across north-central and eastern New Mexico after the initial watch expires, with additional showers and thunderstorms expected on Thursday.

Southern New Mexico and Western Texas

NWS El Paso/Santa Teresa continued a Flood Watch covering southwestern and south-central New Mexico and adjoining parts of far western Texas. The watch is valid from September 22 until September 23. It includes areas such as the Upper Gila River Valley, Southern Gila Foothills, and the Sacramento Mountains.

The bulletin names locations including Las Cruces, Alamogordo, Silver City, and White Sands National Park. The same watch extends into western Texas, covering parts of El Paso County. A separate Texas Flood Watch covers the Salt Basin and Southern Hudspeth Highlands.

The NWS office said an early-season backdoor cool front would interact with deep tropical moisture, bringing several rounds of thunderstorms with torrential rain from Tuesday afternoon through Wednesday evening. Repeated storms could produce higher rainfall totals. Excessive runoff could flood arroyos, rivers, and urban areas with poor drainage.

Southeastern New Mexico and Adjacent Texas

NWS Midland/Odessa continued a Flood Watch for southeastern New Mexico and adjoining parts of far western Texas. This watch is in effect from September 22 until the morning of September 24. In southeastern New Mexico, it covers the Eddy County Plains, Northern Lea County, and Central Lea County. Locations include Artesia, Carlsbad, and Hobbs.

The adjoining Texas area includes parts of the Guadalupe Mountains and the Van Horn corridor. The NWS forecasts numerous to widespread showers and thunderstorms as deep tropical moisture interacts with multiple upper-level disturbances.