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This page was last loaded at 10:02 pm HST Sep 19, 2014 (802 GMT Sep 20, 2014)

Central Pacific (140W to 180) xml button

Tropical Outlook Sea Surface Temperatures CPAC Satellite EPAC Satellite Widgets Satellite Message Forecast Discussion

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Issued: Sep 19, 2014 7:30 PM HST

Based on data through 7:00 pm Sep 19 2014 HST

Latest water vapor imagery shows an upper level trough NE of the state, with an axis around from 30°N 147°W to 21°N 154°W. An associated field of patchy thin cirrus and cirrocumulus clouds is located N of 27°N from 140°W to 146°W.

Meanwhile, a large area of broken to overcast layered clouds can be observed about 450 miles s/se of the Big Island, associated with a low pressure system. A second weaker low remains around 620 miles SE of Hilo with scattered cumulus and cumulonimbus clouds embedded within the layered clouds. A small cluster of active thunderstorms is centered around 11.1°N 153.6°W, or about 600 miles S of Hilo, with cloud tops reaching 44 thousand feet.

Closer to the islands, broken to overcast low clouds remain over much of the Big Island with localized heavy showers affecting the saddle area and the interior slopes of Mauna Loa. Scattered showers also linger over the N Kohala district, and the leeward coastline from Captain Cook to Milolii. On Maui county, broken low clouds cover the leeward and interior slopes of Haleakala with lingering showers around Ulupalakua. Additional patches of broken low clouds and passing showers can be observed near Hana and hamoa. Scattered to locally broken low clouds also linger over the W Maui mountains. Broken low clouds cover much of the E half of Molokai, leeward Lanai and most of Kahoolawe. On Oahu, broken to overcast low clouds with localized heavy showers linger across windward areas from Kahuku to Kaneohe. Broken low clouds with scattered showers prevail over central and SE areas, including the Honolulu metro area. On Kauai county, broken to overcast low clouds with localized heavy showers cover most of Kauai.

Elsewhere, scattered to locally broken cumulus and stratocumulus clouds can be observed across the area N of 10°N with individual cloud elements moving W at around 10 mph.

Far S of the island chain, deep convection with embedded thunderstorms extends along the intertropical convergence zone, or ITCZ, between 02°N to 08°N with cloud tops reaching 50 thousand feet.

Hawaii Infrared Satellite image for 0500 UTC

Central Pacific Infrared Satellite image for 0500 UTC


Western Pacific (West of 180)

Monitored by the:
Joint Typhoon Warning Center
Japan Meteorological Agency

Eastern Pacific (East of 140W) xml button

Active Systems

xml button  Tropical Storm POLO Forecast Advisory Number 16
Issued at 0300 UTC SAT SEP 20 2014

Eastern Pacific Graphical Tropical Weather Outlook

1100 PM PDT FRI SEP 19 2014

For the eastern North Pacific...east of 140 degrees west longitude:

The National Hurricane Center is issuing advisories on Tropical
Storm Polo, located a few hundred miles south-southeast of the
southern tip of the Baja California peninsula. The Weather
Prediction Center in College Park, Maryland, is issuing advisories
on the remnants of Odile, located over the southwestern United

An area of low pressure could develop later this weekend or early
next week a few hundred miles south or southeast of the Gulf of
Tehuantepec. Environmental conditions are expected to be conducive
for some gradual development of this system later next week as it
moves slowly westward or west-northwestward.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

Eastern Pacific Graphical Tropical Weather Outlook

Monitored by the National Hurricane Center (NHC)


Hurricane Preparedness

State of Hawaii Civil Defense
Oahu Department of Emergency Management
Kauai Civil Defense
Maui Civil Defense
Hawaii (Big Island) Civil Defense

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Saffir-Simpson Scale
  • Tropical Storm - winds 39-73 mph (34-63 kt)
  • Category 1 - winds 74-95 mph (64-82 kt)
  • Category 2 - winds 96-110 mph (83-95 kt)
  • Category 3 - winds 111-129 mph (96-112 kt)
  • Category 4 - winds 130-156 mph (113-136 kt)
  • Category 5 - winds 157 mph and up (137+ kt)
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