Snow fell on Mauna Kea Friday even as temperatures rose to record levels and muggy weather continued at lower elevations Friday.
Webcamera images showed snow on the ground at the Mauna Kea summit, 13,796 feet above sea level, Friday morning following overnight storms on the Big Island.
“It’s not unheard of,” said Matthew Foster, a meteorologist with the Honolulu office of the National Weather Service. “It’s rare, but under these conditions, the thunderstorms (overnight) just happened to go over the summit of Mauna Kea.”
Heavy rains over the Big Island overnight into Friday morning prompted a flood advisory for Hawaii County that was lifted at about 8 a.m.
Radar showed heavy rain across the windward side of the island from Waipio Valley to Hakalau to Mountain View and Volcano. A rain gauge at Piihonua reported a rain rate of an inch an hour early Friday morning.
Heavy rains prompted a brief flood advisory for Oahu Thursday afternoon until about 4:30 p.m.
In the 24-hour period ending at 8 a.m., Poamoho in the mountains above Wahiawa got more than 3.8 inches of rain. nearly 2.1 inches fell in the northern Koolaus and 1.9 inches was recorded at the Punaluu Stream.
On Hawaii island, nearly 5.8 inches fell at Waiakea Uka, nearly 5 inches was recorded at Mountain View and the Hilo Airport got about 3.9 inches.
The hot, muggy weather and chance of more showers is expected to continue through Saturday morning.
Thursday’s high temperaures tied records for the date at the Hilo and Honolulu airports. The high in Hilo of 89 degrees tied a record set in 1986.
Honolulu Airport’s high temperature of 91 degrees tied a record set in 1995. High temperature records have been set or tied 20 times so far in July.
High temperatures are expected to be near record levels again Friday.
Forecasters blame an area of moist, unstable weather that moved over the islands for the muggy weather and rain Thursday and Friday.
Rains Friday could be heavy at times and there is a slight chance of thunderstorms.
Tradewinds are expected to blow most of the rain clouds over windward and mauka areas. But some of the showers may make it over to leeward areas.
Drier conditions and breezier tradewinds are expected over the weekend.
A developing weather system may block the tradewinds early next week, creating more muggy weather and the chance of afternoon showers in leeward and mauka areas.
Out in the East Pacific, it’s still too early to say if what’s left of Tropical Depression Enrique and Tropical Storm Dolores will impact Hawaii’s weather other than sending some surf to east and north shores.
East shores should see a slight bump in surf heights from both systems.
Enrique weakened to a tropical depression Friday and is expected to become a remnant low on Saturday. The storm was as about 1,750 miles west of Baja California Friday morning and was nearly stationary. There’s a chance that moisture from Enrique could get caught up in the tradewind flow next weekend and bring some rain.
Dolores also continued to weaken as it moved into cooler waters. It was no longer a hurricane Friday morning with maximum sustained winds of 60 mph and was moving west-northwest at 10 mph. The storm was 340 miles southwest of Cabo San Lazaro, Mexico. It should become a tropical depression Saturday night.