Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 301 PM EDT Fri Oct 12 2018 Valid 00Z Sat Oct 13 2018 - 00Z Mon Oct 15 2018 ...Moisture from the remnants of Sergio will spread into portions of the Southwest and Southern Plains Friday night into Saturday... ...A strong cold front will race south through the Plains Saturday & Sunday. Temperatures will be 20 to 30 degrees below average in the wake of this strong cold front from the Rockies into the Plains this weekend. Record low maximum temperatures possible Sunday across the mid section of the nation ...Heavy snows possible from the Central to Southern Rockies into the Central to Southern High Plains... Tropical depression Sergio is expected to weaken quickly Friday night/early Saturday morning as it moves inland over northwest Mexico. The moisture from Sergio...however...will push into portions of the Southwest and Southern Plains Friday night into Saturday. This will support potential for heavy to locally excessive rainfall amounts from southeast Arizona...southern New Mexico...across north Texas...southern Oklahoma and into northern Arkansas. In the wake of the moisture from Sergio pushing northeastward a strong mid latitude closed low will push across southern California Saturday and into the Southwest Sunday. This system will support additional shower activity from Southern California into Arizona & New Mexico. Across the mid section of the nation...a strong cold front will race southward across the Plains Saturday and Sunday. Temperatures are expected to fall to 20 to 30 degrees below average behind this front across the Rockies and the Plains this weekend. With this much below average air...numerous record low maximum temperatures are possible Sunday from the Upper Mississippi Valley..into the Central to Southern Plains and Central Rockies. In addition to the cold temperatures...heavy snows are possible across the Northern to Central Rockies and into the Northern and Central High Plains..including Cheyenne and Denver. A strong upper vort expected to push quickly through the Ohio Valley tonight..into the northern Mid-Atlantic Saturday and off the southern New England coast Saturday afternoon. Generally light precip amounts expected with this system..with locally heavier totals southeast of Lake Erie and east of Lake Ontario where lake effect rain showers will enhance amounts. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php