Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Sat, 04 Sep 2010 19:30:00 -0500

Based on data through 0000 UTC September 05 2010.

Broad high pressure centered far north northeast of the area is generating low level trade winds across region, while a weak, but complex, pattern aloft is found over the central north Pacific.

A vast field of scattered to locally broken stratocumulus clouds and shower-bearing cumulus clouds is found near the main Hawaiian islands and across waters east to 140°W and north to 30°N. Individual low cloud motions near the state are from the east northeast at 17 to 23 mph.

Low cloud coverage is following a typical trade-wind pattern over the islands this afternoon, with a greater amount of low clouds observed over and east of the Big Island. As a result, broken low clouds cover windward slopes of the Big Island from Volcano to Upolu Point. Day time sea breezes have led to the development of broken to overcast low clouds over nearly all leeward slopes as well as windward Kau. Patches of broken low clouds are confined to windward slopes on the smaller islands, while adjacent waters are dominated by only scattered low clouds. Few to scattered low clouds are found over leeward areas, although a small area of broken low clouds covers the leeward slopes of Haleakala on Maui.

Subsidence aloft seen in water vapor imagery is producing rather stable conditions over the main Hawaiian islands, while a nearly stationary upper level trough sits 750 miles to the northwest of Kauai. An upper level low embedded in the upper trough near 24°N 178°W is travelling to the west around 15 mph. Isolated thunderstorms present under the upper low this morning have dissipated, leaving towering cumulus cells which rise as high as 26 kft.

To the south of the state, two separate portions of the ITCZ contain active convection north of 10°N. Isolated thunderstorms rise as high as 50 kft south of 13°N in the area east of 148°W and in the area west of 177°W.

---

DWROE

---

To change your subscriptions or preferences or stop subscriptions anytime, log in to your User Profile with your e-mail address. For questions or problems with the service, contact support@govdelivery.com.

This service is provided by NOAA’s National Weather Service.

GovDelivery, Inc. (800-439-1420) sending on behalf of NOAA's National Weather Service · 1325 East West Highway · Silver Spring, MD 20910

Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Fri, 03 Sep 2010 19:30:00 -0500

Based on data through 0000 UTC September 04 2010.

Water vapor imagery shows an upper level trough sharpening over the region between the windward side of the Hawaiian island chain and 800 miles northeast of the main Hawaiian islands. Another trough is centered north of 30°N near 168°W but the trough axis stretches southwestward across the far northwestern Hawaiian islands connecting to an upper low near 21°N 175°W. Between these troughs, a sharp north to south oriented upper level ridge is positioned along 162°W, or about 200 miles west of Kauai.

Deep moist convection is limited to the southern portions of the area, south of 12°N, near the intertropical convergence zone which is just south of 10°N. Infrared imagery shows a few thunderstorms with tops above 40000 feet near 10°N 142°W and between 160°W and the dateline between 10°N to 12°N. Elsewhere across the area, scattered to broken low topped stratocumulus dominates. The highest concentration of these clouds is north of 20°N between 165°W and 140°W, and includes the waters surrounding the main Hawaiian islands.

Over the Big Island, broken to overcast low clouds covers the lower slopes below 8000 feet from the Waikoloa Village south to South Point and along the Kau district from South Point to near Volcano. Another deck of broken low clouds stretches from the Puna district across Hilo and along the windward lower slopes northward to Waipio valley.

Over the small islands, scattered low clouds are skirting haleakala's slopes on all sides, and these are locally drifting off the leeward coast reaching Kahoolawe. A small patch of low clouds is found over the mountainous eastern portion of Molokai. More extensive low clouds covers the Koolau mountains of Oahu as well as the Waianae mountains and coast. These clouds are also drifting over the immediately adjacent leeward Oahu coastal waters. Scattered low clouds are hanging across the higher terrain of Kauai and over the leeward coast and waters, reaching Niihau as well.

The cloud tops over the state are estimated by satellite to be between 8000 and 10000 feet, with cloud movement to the west at about 20 mph.

---

BRENCHLEY

---

To change your subscriptions or preferences or stop subscriptions anytime, log in to your User Profile with your e-mail address. For questions or problems with the service, contact support@govdelivery.com.

This service is provided by NOAA’s National Weather Service.

GovDelivery, Inc. (800-439-1420) sending on behalf of NOAA's National Weather Service · 1325 East West Highway · Silver Spring, MD 20910

Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Thu, 02 Sep 2010 13:30:00 -0500

Based on data through 1800 UTC September 02 2010.

High pressure far to the north is producing trade winds across the central Pacific. Low clouds moving along with the trades are moving 10 to 20 mph toward the west. An area of broken stratocumulus /sc/ sits between 140°W and 160°W from 20°N to 30°N. West of 160°W, low cloud coverage lessens and transition to sc and cumulus clouds.

Over the islands, trade winds are building up cloud cover over the windward slopes and coasts of the islands. Leeward locations have mostly clear skies. Windward coastal waters have scattered to broken low clouds moving along with the trades with some isolated showers embedded within these clouds. Over leeward waters, skies are mostly clear with the exception of broken cloud cover to the lee of Maui county and the Big Island.

Water vapor imagery shows an upper level trough extending from 15°N and the dateline to 30°N 172°W, and continues to the north. The rest of the subtropical central Pacific is dominated by an upper level ridge.

Far south of the state, isolated thunderstorms stretch across the intertropical convergence zone between 5°N and 12°N.

---

MORRISON

---

To change your subscriptions or preferences or stop subscriptions anytime, log in to your User Profile with your e-mail address. For questions or problems with the service, contact support@govdelivery.com.

This service is provided by NOAA’s National Weather Service.

GovDelivery, Inc. (800-439-1420) sending on behalf of NOAA's National Weather Service · 1325 East West Highway · Silver Spring, MD 20910