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This page was last loaded at 11:24 am HST Jul 28, 2015 (2124 GMT Jul 28, 2015)

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: Jul 28, 2015 8:30 AM HST

Based on data through 8:00 am Jul 28 2015 HST

Water vapor imagery shows a broad upper level low northwest of the area near 33°N 168°W. Shortwave troughs extend from the low to 22°N 170°W and 27°N 180°, as well as farther east to 28°N 144°W. An area of scattered cumulonimbus clouds is located near the western troughs, generally north of a line from 27°N 156°W to 23°N 164°W to 26°N 176°W. Cloud tops in this area extend up to 46000 ft.

A nearly zonal subtropical jet stream is located just south of the trough, with satellite derived wind speeds to the east-northeast at up to 80 mph. An area of cirrus and cirrostratus clouds is associated with this jet. These clouds are greatest in coverage within 300 miles north of a line from 23°N 155°W to 18°N 172°W.

Farther to the south, isolated cumulonimbus clouds associated with a surface trough are located within 300 miles east of a line from 17°N 157°W to 10°N 163°W. Cloud tops in this area extend up to 48000 ft. Individual cells are moving to the west and northwest at 10 to 15 mph. Additional cirrus debris clouds are located through this area as well, generally south of a line from 21°N 151°W to 15°N 163°W. These high clouds are moving to the north and northeast at 25 to 35 mph.

Across the main Hawaiian islands, broken to overcast low clouds cover the eastern half of Kauai and the windward slopes of the Koolau range on Oahu. An area of showers clouds is located across leeward waters generally between 20 miles and 100 miles west and southwest of Oahu. These clouds are moving to the northwest at 15 mph. Broken low clouds cover eastern Molokai from pukoo eastward, and northern coastal sections of Lanai and west Maui. Broken to overcast low clouds cover the eastern slopes of Haleakala from nahiku to Hana to kaupo below 5000 ft.

On the Big Island, scattered to broken low and mid level clouds are located over south Hilo and Puna districts, and are greatest in coverage to the south and east of Glenwood. An area of broken to overcast low clouds is located just offshore of Puna district, extending 30 to 40 miles offshore to the east and southeast. A small area of mid level clouds is located over upslope sections of Kau district generally between 4000 ft and 11000 ft from Pahala eastward.

Hawaii Visible Satellite image for 1800 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 AM PDT TUE JUL 28 2015

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

The National Hurricane Center is issuing advisories on Tropical
Depression Eight-E, located well to the west-southwest of the
southern tip of the Baja California peninsula.

A broad low pressure system located about 1200 miles south-
southwest of the southern tip of the Baja California peninsula
continues to produce a large area of cloudiness and showers.
Environmental conditions are expected to gradually become more
conducive for development over the next several days, and this
system is likely to become a tropical depression by this weekend
while it moves westward at about 15 mph.
* Formation chance through 48 hours...low...10 percent
* Formation chance through 5 days...high...90 percent

Public Advisories on Tropical Depression Eight-E are issued under
WMO header WTPZ33 KNHC and under AWIPS header MIATCPEP3.
Forecast/Advisories on Tropical Depression Eight-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)


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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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