TX El Paso TX/Santa Teresa NM Zone Forecast for Monday, September 25, 2017 _____ 357 FPUS54 KEPZ 252137 ZFPEPZ Zone Forecast Product for Southwest-Southcentral New Mexico-Far West Texas National Weather Service El Paso TX/Santa Teresa NM 337 PM MDT Mon Sep 25 2017 TXZ418-261015- Western El Paso County- Including the cities of Downtown El Paso, West El Paso, and Upper Valley 337 PM MDT Mon Sep 25 2017 .TONIGHT...Mostly clear.