Hawaiian Islands Satellite Interpretation Message
Sat, 22 Jan 2011 23:30:00 -0600
Based on data through 0500 UTC January 23 2011.
Water vapor loop shows a closed upper level low centered at 22°N 143°W. A weak upper trough extends southwest of the low to 05°N 163°W. No clouds are associated with the upper low, but the eastern flank of the trough and associated 60 mph jet stream is producing a 400 mile wide band of mid and high clouds along an axis from 02°N 153°W to 09°N 141°W to 08°N 127°W. Isolated embedded towering cumulus clouds are also observed on infrared satellite within a 100 mile radius of 08°N 143°W.
A subtropical jet is also bringing some high clouds into the northwestern central Pacific basin. The associated clouds are north of a line from 25°N 174°E to 30°N 170°W.
At the low levels, most of the central Pacific is dominated by a relatively weak surface high centered around 40°N 133°W and is driving moderate to fresh easterly winds. A weak cold front is located along a line from 40°N 152°W to 26°N 166°W to 18°N 173°E, increasing strength further north. The front is characterized by a ragged 175 mile wide band of overcast stratus clouds moving east at 12 mph. The front breaks up the easterly flow, veering it southerly about 250 miles east of the boundary.
The easterly winds are carrying scattered to broken cumulus clouds around the main Hawaiian islands this evening. Upstream to the east, the clouds become a bit more dense and stratiform, particularly west of 150°W. Last visible images show a band of broken to overcast low cloud build ups from Oahu to the Big Island. Most of the cloud cover is over the windward waters and over land, while leeward waters southwest of the Big Island also have a lot of the low clouds overhead. The Big Island and Maui are covered in clouds up to 10 kft in elevation. Molokai and Lanai have broken to overcast clouds over windward portions of the islands, with some clearing over leeward sides of the islands. Oahu has overcast clouds over the Koolau range and windward side, and broken clouds over the rest of the island. Kauai has scattered clouds over the central and leeward side of the island. The rest of the island is mostly clear. Radar shows isolated showers over the state.
FOSTER
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