Hawaii
Hawaii snow warning cautions drivers that travel could be difficult
National Weather Service (NWS) meteorologists at the Honolulu, Hawaii, office warned that snow on Big Island summits could make for difficult travel on Monday.
October is the start of Hawaii’s wet season, which runs through April. On Monday morning, meteorologists issued a winter weather advisory for the Big Island. According to the forecast, “deep moisture will continue to move over the area today, leading to periods of rain and snow on the high summits.”
It is not uncommon for snow to fall on Hawaii’s volcanic peaks given their altitude, and even blizzard warnings have been issued in Hawaii during the winter months. At times, advanced skiers travel to Hawaii to ski the volcanic slopes, although there are no ski resorts in the state.
Sakkawokkie/Getty
On Monday, the storm was expected to produce mixed precipitation with periods of rain and snow.
“Additional snow accumulations up to 3 inches, mainly in the morning. Travel could be very difficult. Blowing snow will significantly reduce visibility at times, with periods of zero visibility,” the advisory said. “A winter weather advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities, and use caution while driving.”
NWS meteorologist Liam Tsamous told Newsweek that it is unclear how much snow has already fallen on the high-elevation peaks, given that there are no observation stations there. Up to 4 inches of rain has fallen in low-elevation areas, he said.
At nearly 14,000 feet above sea level, the Mauna Kea volcano is the tallest peak in Hawaii. It is the world’s tallest mountain when measured base to peak, as its base extends nearly 20,000 feet below sea level.
The volcano is so high that it occasionally experiences snowfall during the summer months as well. Tsamous said it is not uncommon to see snow on the mountain’s peaks in October.
The storm was also bringing excessive rain to the rest of Hawaii, with most lower-elevation areas under a flood watch.
“An upper low in the vicinity of the Hawaiian Islands is producing unstable conditions within a very moist atmosphere,” the flood watch said. “This will result in periods of moderate to locally heavy showers. Rain that occurs over already saturated ground could quickly lead to runoff and flash-flooding issues.”
The flood watch remains in effect for all the main Hawaii islands through Monday afternoon, the advisory said.
“Flood-prone roads and other low-lying areas may be closed due to elevated runoff and overflowing streams,” the flood watch said. “Urban areas may receive more significant flooding and property damage due to rapid runoff.”
Hawaii
Severe flooding triggers road closures, evacuations in Manoa
HONOLULU (HawaiiNewsNow) – Portions of Manoa flooded Monday after several days of heavy rain.
According to Honolulu police, flooding was observed at multiple locations along East Manoa Road, including the intersections with Lowery Avenue, Akaka Place, and Oahu Avenue. That portion of the road is closed, and drivers are being asked to avoid the area.
Your HNN First Alert Weather Team declared Monday a First Alert Weather Day due to the threat of heavy rain and flash flooding.
The area was under a flash flood warning, with rain falling at 1 to 2 inches per hour and stream levels running very high.
Viewers have been sending Hawaii News Now photos and videos showing flooded roads and vehicles submerged in water at Manoa Marketplace.
Heather Damon said the rain “has not stopped for days. The ground is so saturated.”
The University of Hawaii at Manoa is asking students and employees to stay inside and off roads unless absolutely necessary until further notice, citing severe rain and flooding in some parts of campus.
In an alert, UH said officials are at faculty housing to address issues in the area. UH also said some student housing — Hale Wainani G and H — is being evacuated, and residents should follow all staff instructions.
Stay with Hawaii News Now for the latest First Alert Weather Day coverage.
Copyright 2026 Hawaii News Now. All rights reserved.
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