[Ncep.list.emc.monsoondesk] Weekly Updates of Global Monsoon Systems

Wei Shi - NOAA Federal wei.shi at noaa.gov
Mon Jul 24 15:59:20 UTC 2017

The weekly PowerPoint presentations summarizing the recent variability of
the global monsoon systems have been updated on the CPC Global Monsoons


*African Monsoons:*

Weekly rainfall surpluses exceeded 100mm over portions of southern Nigeria.

Week-1 outlooks call for an increased chance for above-average rainfall
over southern Senegal, southwestern Mali, Guinea-Bissau, Guinea-Conakry,
Sierra Leone, western Liberia, northwestern Cote d'Ivoire, portions of
Nigeria and Cameroon, and western Ethiopia. In contrast, there is an
increased chance for below-average rainfall over eastern Liberia, southern
Cote d'Ivoire and southern Ghana.

*Asian-Australian Monsoons:*

For the past 90 days, weak below normal rainfall deficits remain in general
over parts of central and peninsular India, east central China, Koreas,
Japan, Papa New Guinea, and much of Australia. During same period, rainfall
excess remain over central western and  northeastern India, Bangladesh,
Burma, and many southeast Asian countries bordering South China Sea area
including large parts of Thailand, Laos, Cambodia, Vietnam, the Philippines
and Indonesia. For the past 30 days, overall,  below normal rainfall
situation is noted over peninsular India, north central China, parts of
Japan and southeastern Australia. Elsewhere, the rainfall is mostly above
normal to normal.

In this past week, the observed rainfall amounts has been  deficient over
northern Indian and across central and eastern China, Koreas, Japan,
Malaysia and over the larger Indonesian islands. The India Met. Dept, (IMD)
is reporting that the monsoon, so far since the beginning of June, is
about 4% above the long term mean across India as a whole. As of this
writing, many tropical storms are active in the western and eastern
tropical Pacific. In the next couple of weeks the NCEP GFS model is
predicting below normal rainfall over much of the region, except along
central India and parts of Burma, Thailand, Cambodia, Vietnam and Laos.

*North American Monsoons:*

Above-average rainfall has been observed over much of Arizona and
northwestern Mexico during the past week.

Rainfall accumulations over the past 30 days were above-average for
southern Arizona and northwestern Mexico and below-average for southern New
Mexico and along the west coast of Mexico.

NCEP/GFS Forecasts call for above-average precipitation for southern
Arizona and northwestern Mexico during 24 – 30 July 2017.

*For questions or comments, please contact:

Endalkachew.Bekele at noaa.gov (for the African monsoons)

Muthuvel.Chelliah at noaa.gov  (for Asian-Australian monsoons)

Wei.Shi at noaa.gov  (for American monsoons and for general issues about the
CPC Global Monsoons products)
Wei Shi, Ph.D
Climate Prediction Center/NCEP/NWS/NOAA
NCWCP  Room 3116
5830 University Research Court
College Park, MD 20740
Phone: (301) 683-3440
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