Forecast: Unsettled weather prompts various weather alerts and advisories
(Image: Hawaii News Now)
Good Thursday morning. There are a number of weather alerts and advisories posted associated with the unsettled weather that is coming our way.
Winter Storm Watch now UPGRADED to a Winter Storm Warning:
Big Island Summits above 8K ft.
Thursday into Friday
Mauna Kea & Mauna Loa snow and ice
Snow forecast: 1/2 foot or more depending on moisture surge
Temperatures fall below freezing
Hazards: Ice, Freezing Rain at lower elevations and heavy snow at higher elevations
Flash Flood Watch:
Thursday into Friday
Potential heavy rain and thunderstorms that may lead to substantial flash flooding over the eastern-end of the state
High Surf Advisory for east-facing shores
Small Craft Advisory for all coastal waters
Gale Warning - MAALAEA BAY-PAILOLO CHANNEL-ALENUIHAHA CHANNEL (strong winds over the waters)
Our severe weather team is tracking a strong area of high pressure far northeast of the state that continues to act as a powerful trade wind fan. On top of that, an unstable air mass associated with a trough, an area of low pressure aloft, will influence our weather by helping produce heavy downpours and thunderstorms for parts of the state. Right now, the biggest threat will be focused over the eastern-end of the state where we can tap into a surge of moisture.
The trades will keep windward neighborhoods wet through Thursday, and showers will spread leeward over the smaller islands due to strong gusty winds that will carry it over the terrain.
Another trough, area of low pressure aloft, will approach from the northwest Friday. This trough will usher in a period of southeast winds and wet weather through the weekend that could lead to flooding. A Flash Flood Watch may include other islands when we approach the weekend.
Surf Update: We are keeping tabs on advisory-level surf that continues to impact east facing shores through Friday. A long-period northwest swell is expected to arrive Thursday afternoon, peak late Thursday night through Friday at advisory levels along north and west facing shores, then gradually ease through the weekend. Moderate to fresh southerly winds will lead to rough surf along south facing shores by the end of the weekend through early next week.
Stay tuned and stay alert. We will have the latest weather updates on our HNN Weather Now and on Sunrise through 9 am and starting at 5 pm for the evening coverage.