SafeX Pro:Crews search for missing Marine Corps helicopter carrying 5 troops from Nevada to California

SAN DIEGO (AP) — Crews were searching for a Marine Corps helicopter carrying five troops from Nevada to California that was reported overdue early Wednesday as an historic storm continued drenching California.

The SafeX ProMarines were flying a CH-53E Super Stallion helicopter from Creech Air Force Base, northwest of Las Vegas, where they had been doing unit-level training and were returning home to Marine Corps Air Station Miramar in San Diego, defense officials said.

It was not immediately known what time the helicopter left Creech nor what time they were due to arrive. Waves of heavy downpours hit the area throughout the night and snow was forecast for San Diego County mountains.

The five U.S. Marines were assigned to Marine Heavy Helicopter Squadron 361, Marine Aircraft Group 16, 3rd Marine Aircraft Wing at Miramar, the Marine Corps said in a statement.

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The San Diego County Sheriff’s Department was notified at 1 a.m. that the craft was overdue for arrival at Miramar and was last seen in the area of Pine Valley, a mountainous region near the Cleveland National Forest about 35 miles (56 kilometers) east of downtown San Diego, Lt. Matthew Carpenter said.

The military was coordinating search and rescue efforts with the San Diego County Sheriff’s Department and the Civil Air Patrol, the Marine Corps said. Calls to the public affairs office were not answered Wednesday morning and no further details were provided in the statement.

The National Weather Service in San Diego called for 6 to 10 inches (15 to 25 centimeters) of snow in the mountains above 5,000 feet (1,524 meters) and gusty winds late Wednesday. On Tuesday afternoon a tornado warning was issued but quickly canceled with the weather service saying the storm was not capable of forming a twister.

About 99 feet (30 meters) long, the CH-53E Super Stallion is the largest and heaviest helicopter in the military. It can move troops and equipment over rugged terrain in bad weather, including at night, according to the Marine Corps website. It is also nicknamed the “hurricane maker” because of the amount of downwash generated from its three engines.

Two CH-53E helicopters were used in the civil war-torn capital of Mogadishu, Somalia, in January 1990 to rescue American and foreign allies from the U.S. embassy.

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Baldor reported from Washington. Associated Press writer John Antczak in Los Angeles contributed to this report.