More than 100 officers have fanned out again in the snow-covered San Bernardino Mountains as the search resumed for the former Los Angeles police officer suspected of going on a deadly rampage to get back at those he blamed for ending his career.
Authorities hope clearer skies will allow aircraft to help them in the manhunt for Christopher Dorner, which entered its fourth day.
Relentless snowfall on Friday grounded helicopters with heat-sensing technology and hampered their effort to find Dorner.
A former LAPD captain's daughter and her fiance were killed last weekend, while one police officer was killed and another injured in separate shootings on Thursday.
Dorner's burned-out truck was found at Big Bear lake, with footprints leading away from it. He is thought to be somewhere on the enormous, snow-covered mountain, hiding among the skiers, hundreds of cabins and dense California woods.
As heavy snow fell in the mountains, thousands of heavily armed police remained on the lookout throughout California, Nevada, Arizona and northern Mexico.
Police said officers were guarding more than 40 people mentioned as targets in a rant they said Dorner posted on Facebook.
He vowed to use "every bit of small arms training, demolition, ordinance and survival training I've been given" to bring "warfare" to the Los Angeles Police Department and its families.
The manhunt had Southern California residents on edge. Some law enforcement officials speculated that he appeared to be everywhere and nowhere, and that he was trying to spread out their resources.
In his online rant, Dorner seemed to taunt authorities. He wrote: "I have the strength and benefits of being unpredictable, unconventional, and unforgiving."