Issued: Mar 29, 2015 8:35 AM HST
Latest water vapor satellite imagery show an upper level ridge located over the main Hawaiian islands. Also, an upper level low is producing an area of thunderstorms centered around at 09.4°N 142.8°W or 1080 miles SE of the Big Island. Cloud tops in these thunderstorms are reaching 38 thousand feet. Meanwhile, a surface cold front is located about 310 miles NW of Kauai with an associated 100 mile-wide cloud band extending from 30.0°N 157.8°W to 22.4°N 178.2°W. Cloud tops in this band range from 12 to 16 thousand feet, highest near 30°N. Closer the islands, scattered to broken low clouds are streaming from the E across windward and SE areas of the Big Island while mostly clear to scattered conditions prevail over most leeward Big Island locations. On Maui county, broken low clouds and a few showers cover the windward and leeward slopes of Haleakala, and over coastal locations from nahiku to hamoa to kaupo. A swath of broken low clouds is also streaming W from Haleakala into Kahoolawe. Broken to overcast low clouds also linger over the W Maui mountains, the E Molokai mountains and over most of the W half of Molokai. On Oahu, broken to overcast low clouds and scattered showers cover the Koolau mountains and portions of the Waianae range. On Kauai county, broken low clouds cover most of the E half of Kauai, along with patches of broken to overcast low clouds lingering near mana and polihale.
Elsewhere, scattered to broken cumulus and stratocumulus clouds cover the area N of 10°N between 140.0°W to 180 and E of the aforementioned cold front. Individual cloud elements are moving to the W at around 15 mph, turning to the N and NE immediately ahead of the front between 150.0°W and 160.0°W. Mainly broken stratocumulus clouds prevail W of the front with cloud motion to the s/sw.
Far S of the islands, deep convection with embedded thunderstorms extend along the intertropical convergence zone along 05°N between 162.0°W to 180. Highest cloud tops in these thunderstorms are reaching 52 thousand feet.