ALBUQUERQUE — Heavy rainfall is forecast throughout much of central and northern New Mexico through the weekend, with the possibility of flash flooding.

The National Weather Service says areas with recent wildfire burn scars and mountain slopes -- and places downstream from those areas -- are particularly vulnerable.

Meteorologist Kerry Jones says it's likely some areas could see 6 to 10 inches of rain through the weekend.

From Monday to Wednesday, Farmington received 2.22 inches of rainfall, according to a measurement taken in the northeastern part of the city, said Jennifer Palucki, a meteorologist for the National Weather Service in Albuquerque.

American Red Cross volunteers have opened a shelter in Chavez County in southeastern New Mexico to help motorists stranded by flooded roads.

A shelter in Doña Ana County is helping families evacuated due to flooding.

Officials at Carlsbad Caverns National Park have closed the main highway due to potential flooding, and two rain-caused rock slides on both sides of a tunnel on U.S. 82 east of Alamogordo closed the highway briefly Wednesday.

New Mexico Gov. Susana Martinez activated the New Mexico Emergency Operations Center to monitor conditions caused by monsoon rains across the state.

The EOC was activated to Level 3 monitoring status, according to a news release.

When the EOC is activated, more staff is available 24 hours a day to provide assistance and take requests from government agencies across the state dealing with heavy rains or flooding.

"The recent rains have caused flooding in various county and tribal jurisdictions across the state," said Gregory Myers, cabinet secretary for the New Mexico Department of Homeland Security and Emergency Management, in a prepared statement. "Gov. Martinez asked for this elevated monitoring status to best coordinate state resources to help communities that need help."

The Daily Times reporter Ryan Boetel contributed to this story.