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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: Aug 24, 2016 7:30 PM HST

Based on data through 7:00 pm Aug 24 2016 HST

The last visible satellite images of the evening show easterly low level flow around the Big Island becoming southeasterly over the central islands and southerly around Kauai. A typical early evening cloud pattern prevails over the Big Island, with broken to overcast cumulus /cu/ and stratocumulus /sc/ covering most of the windward coast, the Puna and Kau districts, and the leeward coast. Mostly clear skies prevail over the saddle area and the summits. A small area of towering cumulus with estimated tops up to 35 thousand feet is located just west of Kona and is drifting further offshore. Areas of broken cu and sc are abundant over Maui, Lanai, Molokai and Oahu, but these clouds are generally much lower than the ones observed this morning, with estimated tops only around 8 to 10 thousand feet. An isolated heavy shower has developed recently over the Koolau range on Oahu, with radar estimated tops near 35 thousand feet. Over Kauai, cloudy conditions prevail over the interior and na Pali coast, while clear skies prevail over the windward, south and leeward coasts.

A deep upper level trough is located over the far northwestern Hawaiian islands, extending as far south as 15°N between 170°W and 180. A surface low along the eastern side of the upper level trough is centered near 38°N 166°W. An area of layered cloudiness with isolated embedded towering cumulus is rotating through the upper level trough, covering the waters north of 25°N between 168°W and 178°W. Two additional areas of broken cumulus with isolated embedded towering cumulus and cirrus above are also associated with the upper level trough and lie northwest and north of the main Hawaiian islands. These areas are located along and 150 miles either side of a line 21°N 168°W to 30°N 163°W, and from 24°N to 30°N between 157°W and 162°W. Highest estimated tops in these areas are around 40 thousand feet.

Yet another area of overcast layered cloudiness with isolated embedded cumulonimbus /cb/ clouds is located at the base of the upper trough, covering the waters from 14°N to 19°N and between 174°W and 180. Highest estimated tops are near 48 thousand feet. Dense cirrus emanating from this activity extends as far east as 170°W south of 20°N.

A weak surface low is centered far southeast of the Hawaiian islands near 12°N 149°W. Widely scattered CB associated with this low are present within 300 miles of the low center. Highest estimated tops in this area extend up to 49 thousand feet. This low is moving slowly to the west.

Over the remainder of the central north Pacific, few to scattered cu and sc prevail, except for north of 18°N and east of 150°W where areas of broken sc are moving westward at 10 to 15 mph within trade wind flow.

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

Eastern Pacific Graphical Tropical Weather Outlook

1100 PM PDT WED AUG 24 2016

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

The National Hurricane Center is issuing advisories on Tropical
Depression Thirteen-E, located several hundred miles west-southwest
of Manzanillo, Mexico.

Showers and thunderstorms associated with an area of low pressure
located about 1300 miles southwest of the southern tip of the Baja
California peninsula have changed little in organization during the
past several hours. Environmental conditions are expected to be
conducive for slow development of this system, and a tropical
depression is likely to form by this weekend while the low moves
westward or west-northwestward at 15 mph.
* Formation chance through 48 hours...medium...50 percent
* Formation chance through 5 days...high...80 percent

Public Advisories on Thirteen-E are issued under WMO header
WTPZ33 KNHC and under AWIPS header MIATCPEP3.
Forecast/Advisories on Thirteen-E are issued under WMO header
WTPZ23 KNHC and under AWIPS header MIATCMEP3.

Eastern Pacific Graphical Tropical Weather Outlook

Monitored by the National Hurricane Center (NHC)


Hurricane Preparedness

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Oahu Civil Defense
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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 111-130 mph (96-113 kt)
  • Category 4 - winds 131-155 mph (114-135 kt)
  • Category 5 - winds 156 mph and up (135+ kt)
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