Last Updated on Sunday, 08 December 2013 07:21
Winds Statewide in a glance ...just go HERE(this link is also the 4th drop down under weather)
Dec 08, 2013 4:00 AM HST
Weak high pressure over the island chain will keep light winds with increasing haze and humidity during the next couple of days. An upper level low well south of the islands will push enough moisture and instability into the area for a few downpours to develop over the Big Island today, along with increasing chances of showers over the smaller islands through Monday. The trades are expected to return on Tuesday as high pressure builds north of the state.
Abundant moisture embedded in the SE flow will continue to move across the Big Island today with better chances of rain over the SE slopes of Mauna Loa and S portions of the leeward slopes. An upper level low can be observed in water vapor satellite imagery about 690 miles SSW of the island chain, which is contributing to the increase in cloud cover and shower activity across the Big Island. This low has moved little during the late night hours, but latest model guidance has it migrating ENE during the next couple of days.
The deeper moisture and the higher instability will continue to affect mostly the Big Island this morning, with best chances for heavy showers over the Kau district. The deeper moisture layer will gradually spread across the smaller this afternoon and through Mon, bring increasing cloud cover and shower activity. Winds will veer and weaken a little more today with possible S flow establishing in the afternoon. There will be enough moisture available for a round of afternoon showers over interior and N portions of the smaller islands if the flow weakens enough.
For the rest of the week, a mid lvl ridge is shown by the models establishing right over the aloha state by Tue, with sfc high pressure also strengthening N of the island chain. This synoptic scenario will bring a return of the trades and clear out the haze and humidity, with a more typical trade wind shower regime establishing through at least Thu.
The trades may be disrupted again late Thu as a frontal boundary moves to the N of the islands while gradually dissipating. Another strong high will move in to the N of the main Hawaiian islands towards next weekend.