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Monday, October 25, 2010
City and County of Honolulu News Releases
Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Mon, 25 Oct 2010 19:30:00 -0500
Based on data through 0000 UTC October 26 2010.
An upper level low we have been tracking for several days now was centered about 250 miles west-southwest of Kauai and moving to the northwest at 15 mph. Counterclockwise flow around the low continued to bring high clouds up over the islands from the south. Most of the clouds were located between 20 to 30 thousand feet, and were wrapping around the low at 30 to 50 mph.
Upon close inspection, scattered to broken low clouds can be seen through thin spots and breaks in the high clouds. Because of the brisk trades, there was little difference in cloud cover upwind and downwind of the islands. The low clouds were moving to the west at 20 to 25 mph. Tops were at 6 to 7 thousand feet. Other than the high clouds, the low aloft had no effect on island weather.
The high clouds were being blown off the tops of scattered to broken thunderstorms, CB, located along the ITCZ. The ITCZ stretched from 140°W to 180°W between 07°N and 10°N. The greatest concentration of CB was between 143°W and 152°W, where CB tops were near 50 thousand feet.
Far to the northwest, layered clouds and embedded CB were observed northeast through east and south of a low centered near 28°N 179°W. The bulk of the clouds were northwest of a line from 30°N 160°W to 20°N 175°W to 16°N 180°W. Cb tops were 45 to 50 thousand feet. The low and area of clouds were nearly stationary.
CRAIG
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Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Mon, 25 Oct 2010 13:30:00 -0500
Based on data through 1800 UTC October 25 2010.
An upper level low observed on water vapor imagery about 200 miles southwest of Kauai was moving to the northwest at around 15 mph. Counterclockwise flow around the low was carrying high clouds up over the islands from the south. The entire island chain and surrounding waters were obscured by the clouds. Most of the clouds were between 20 to 30 thousand feet, and were wrapping around the low at 30 to 50 mph.
Just east of the islands where there were breaks in the high clouds one saw scattered to broken low clouds moving to the west at 20 to 25 mph. From the appearance of the clouds, many had showers.
The source of the high clouds was the ITCZ located between 07°N and 10°N. Thunderstorms were scattered to broken along the entire length of the ITCZ between 140°W and 180°W. The greatest concentration of thunderstorms was between 143°W and 152°W where cloud tops were in excess of 50 thousand feet.
Far to the northwest, layered clouds and embedded thunderstorms were observed northeast through south of a low centered near 27°N 180°W. The bulk of the clouds were northwest of a line from 30°N 170°W to 20°N 175°W to 17°N 180°W. Thunderstorm tops were 45 to 50 thousand feet. The low and all of the clouds were drifting to the east.
CRAIG
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Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Mon, 25 Oct 2010 07:30:00 -0500
Based on data through 1200 UTC October 25 2010.
The upper level low noted on water vapor imagery is about 225 miles west of Honolulu at 2 am. The low has been moving to the northwest around 25 mph over the last six hours. This upper level low continues to bring high clouds over the main Hawaiian islands. The high clouds are thickest from Oahu to the Big Island, but a fair amount of high clouds are passing over Kauai county at 2 am.
The high clouds are obscuring most of the lower clouds over the islands overnight. To the east of the islands, and east of the high clouds, scattered low clouds can be seen moving in from the east between 20 and 25 mph.
The high clouds extend to the south of the islands, where they merge with layered clouds in the ITCZ. Two areas of thunderstorms remain in the ITCZ at 2 am, with the eastern area strengthening and the west area weakening over the last six hours. The eastern area lies along a line from 7.8°N 142.2°W to 7.5°N 153.1°W with tops near 55000 feet. The western area is along a line from 7.5°N 164.4°W to 9.9°N 173.1°W with tops near 52000 feet.
Layered clouds associated with a front northwest of the main Hawaiian islands are about 940 miles northwest of Honolulu at 2 am.
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Sunday, October 24, 2010
Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Mon, 25 Oct 2010 00:30:00 -0500
Based on data through 0500 UTC October 25 2010.
Water vapor imagery, shows an upper level low southwest of the main Hawaiian islands this afternoon. This upper level low is bringing high clouds over the main Hawaiian islands from the south. These high clouds extend to the south into the ITCZ. Thunderstorms in the ITCZ this evening are concentrated in two areas. The eastern area of thunderstorms is along a line from 8°N 145°W to 7°N 154°W. The other main area of thunderstorms in the ITCZ is in an area between 6°N and 10°N from 164°W to 174°W. Clouds tops in both areas are near 52000 feet.
The high clouds streaming over the main Hawaiian islands this afternoon are obscuring most of the islands from Oahu to the Big Island island, making it difficult on satellite to determine the extent of low cloud coverage. Through holes in the high clouds, scattered low clouds appear over the east facing slopes of the west Maui mountains and the slopes of Haleakala.
The high clouds have not yet reached Kauai county at 7 pm. Low clouds are building over the east side of Kauai, with other low clouds passing over Niihau.
Layered clouds are about 1200 miles northwest of Honolulu this evening, associated a front. Thunderstorms have been noted along the front with cloud tops reaching near 47000 feet at 7 pm.
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Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Sun, 24 Oct 2010 13:30:00 -0500
Based on data through 1800 UTC October 24 2010.
Low clouds were scattered to broken over east facing mountain slopes of Kauai, the length of the Koolau mountains,,,the sea cliffs of Molokai, the eastern half of the west Maui mountains, and along the coast from Hana southward. The rest of the smaller islands had clear skies.
The Big Island had three spots with broken clouds, along the Kona coast near Milolii, the windward Kohala mountains, and the Hilo and Puna districts. The rest of the island Sat under clear skies.
Clouds north and east of the islands were gathered into clusters separated by clear skies. The clusters were east-northeast of Kauai, north of Oahu, north of Maui, north clockwise through south of the Big Island. Some of the clouds appeared to be depositing isolated showers.
Skies south and west of the islands had a totally different appearance. Instead of clusters, broken to overcast clouds were organized along wiggly lines. The most noticeable lines extended west of the south Kona coast and southwest of makena Maui. A mix of clear skies and scattered clouds were observed elsewhere within 80 miles south and west of the islands.
The low clouds were moving to the west at 15 to 20 mph, with speeds decreasing moving from east to west up the chain. Cloud tops ranged from 5 to 6 thousand feet.
Aloft above 25 thousand feet, a weak low was centered about 250 miles south of Honolulu near 18°N 157°W and was moving west at 15 mph. The low was setting off isolated thunderstorms within 120 miles east and west of 13°N 158°W. A small cluster of showers and thunderstorms was also evident near 16.5°N 163.5°W, or 500 miles southwest of Honolulu. Additionally, high clouds were streaking north and northeast in the area east clockwise through south of the low. The upper low had no noticeable effect on the low clouds around the islands.
Unorganized showers and thunderstorms were scattered along the intertropical convergence zone in an area from 05°N to 10°N between 140°W and 180°W. The tallest thunderstorms with tops above 50 thousand feet were located west of 155°W.
CRAIG
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Hawaiian Islands Satellite Interpretation Message
Hawaiian Islands Satellite Interpretation Message
Sun, 24 Oct 2010 07:00:00 -0500
Based on data through 1130 UTC October 24 2010.
Skies are nearly clear across the island chain this early morning. The only areas where low ceilings appear to be occurring from time to time are the west-facing slopes of Haleakala in east Maui, and coastal and lower upslope sections in north and south Kona on the Big Island. Low cloud motion is from the east at 15 to 20 mph across the aloha state, with speeds decreasing moving from east to west up the chain.
Small patches of broken low clouds, some with embedded showers, exist northeast clockwise through southeast of the Big Island and are heading west with the prevailing trade flow. Plume clouds are producing occasional low ceilings west of the isle. Conditions elsewhere in the adjacent coastal waters are clear to scattered.
Aloft above 25 thousand feet, a weak low, centered near 17.5°N 156.5°W as of bulletin time, has been pushing west near 15 mph over the past seven hours. The system, about 270 miles south-southeast of Honolulu, has been inducing isolated thunderstorms from 11.5°N to 14.5°N between 154°W and 159°W. A small cluster of showers and thunderstorms is also evident near 16.5°N 161.5°W, or 415 miles southwest of Honolulu. Additionally, swaths of high clouds have been streaking north and northeast in the area to the east clockwise through south of the low.
Unorganized showers and thunderstorms are firing far south of Hawaii along the intertropical convergence zone. The convection is found in two areas. The first stretches from 06.5°N to 10°N between 128°W and 148°W, and the other from 06°N to 10°N between 153°W and 177°E. A few cells are towering above 50 thousand feet, located from 06.5°N to 09°N between 176°W and 179°E as of this writing.
KINEL
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GovDelivery, Inc. (800-439-1420) sending on behalf of NOAA's National Weather Service · 1325 East West Highway · Silver Spring, MD 20910