* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of New Mexico, including the following areas, Central Grant County/Silver City Area, East Central Tularosa Basin/Alamogordo, East Slopes Sacramento Mountains Below 7500 Feet, Eastern Black Range Foothills, Northern Dona Ana County, Otero Mesa, Sacramento Mountains Above 7500 Feet, Sierra County Lakes, Southeast Tularosa Basin, Southern Dona Ana County/Mesilla Valley, Southern Gila Foothills/Mimbres Valley, Southern Gila Region Highlands/Black Range, Southwest Desert/Mimbres Basin, West Central Tularosa Basin/White Sands and West Slopes Sacramento Mountains Below 7500 Feet and southwest Texas, including the following areas, Eastern/Central El Paso County, Northern Hudspeth Highlands/Hueco Mountains, Rio Grande Valley of Eastern El Paso/Western Hudspeth Counties and Western El Paso County. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - An early season back door cool front will interact with a late season plume of deep tropical moisture, bringing several rounds of thunderstorms with torrential downpours to the region Tuesday afternoon through Wednesday evening. Repeated thunderstorms may tend to focus in one or two areas, resulting in higher end precipitation totals. The most critical period with the heaviest rain potential will likely be Tuesday night into Wednesday morning. - http://www.weather.gov/safety/flood