The National Weather Service yesterday issued a flash flood watch for all islands through tonight.

A weather system west of Kaua'i was making the atmosphere moist and unstable, leading to a chance of widespread heavy rain, the weather service said.

The Big Island had the heaviest rainfall yesterday. For the 24-hour period ending at 8 p.m., Pahoa received 3.98 inches of rain, the Pali 2 rain gauge had 3.62 inches and the Pahala 3.14 inches.

On O'ahu, the wettest spots were Waipi'o and Kunia, which each received about a half-inch of rain.

A flash flood watch means conditions exist that may lead to flash flooding. If the threat becomes imminent, the weather service may issue a flash flood warning.

MARINES TO BEGIN HIKE AT 3:15 A.M.

About 1,000 Marines with the 1st Battalion, 3rd Marine Regiment at Kane'ohe Bay will conduct a conditioning hike early tomorrow morning from the base's Mokapu back gate to Kailua Beach Park.

The march will begin at 3:15 a.m., the Marine Corps said. The 1st Battalion is preparing for a deployment to Iraq.

Marine Corps officials said they are working closely with police to coordinate the activity.

Conditioning hikes promote combat readiness and are essential training requirements for Marines stationed at Kane'ohe Bay, Marine Corps officials said.

POOL-HALL ROBBERY SUSPECT CHARGED

Prosecutors last night charged a 33-year-old Pearl City man in connection with last Thursday's takeover robbery at a Waimalu pool hall.

Ju Young Woo was charged with first-degree robbery and four counts of kidnapping. His bail totals $750,000 pending an initial appearance today at District Court.

According to police, three masked men entered Aiea Cue, on the second floor of a building at 98-064 Kamehameha Highway, at 2:15 a.m. and forced four people into another room. The men broke into an automated teller machine and a change machine and fled with cash.

Woo was identified as a suspect by investigators and was arrested Monday night on Imina Place in Mililani.

Woo's criminal record includes three convictions.

MAN ACCUSED OF STEALING EX'S CAR

Police yesterday arrested a man in Kahalu'u on suspicion of stealing his former girlfriend's car.

The 20-year-old suspect was arrested at Ka'alaea Road and Kamehameha Highway at 4 p.m. for investigation of first-degree unauthorized entry into a motor vehicle, auto theft, petty misdemeanor reckless driving, a license violation and knocking down traffic lane markers.

The man was also being held on an outstanding $1,000 warrant.

According to police, the suspect reached into the 19-year-old woman's car, grabbed her cell phone and smashed it on the ground during a verbal argument at 3:10 p.m. When the woman got out of her car, the suspect got in and drove off.

Charges were pending last night.