africa hazards briefing august 9 2011
Download
Skip this Video
Download Presentation
Africa Hazards Briefing August 9, 2011

Loading in 2 Seconds...

play fullscreen
1 / 20

Africa Hazards Briefing August 9, 2011 - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

Africa Hazards Briefing August 9, 2011. Miliaritiana Robjhon miliaritiana.robjhon@noaa.gov. 850 hPa Wind Vector and Anomalies. Anomalous easterly winds have enhanced the westward propagation of waves across West Africa.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Africa Hazards Briefing August 9, 2011' - kaemon


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
africa hazards briefing august 9 2011

Africa Hazards BriefingAugust 9, 2011

Miliaritiana Robjhon

miliaritiana.robjhon@noaa.gov

slide2

850 hPa Wind Vector and Anomalies

  • Anomalous easterly winds have enhanced the westward propagation of waves across West Africa.
  • The extension of rainfall into the Afar region of Ethiopia was associated with anomalous southerly winds.
slide3

Weekly Rainfall Totals: West Africa

Last Week

This Week

  • Rainfall was more localized, with a MCS bringing downpours in western Mali.
  • An increase in rainfall was observed in the Gulf of Guinea region.
slide4

Last Week

This Week

7 Day

30 Day

slide5

Nganda, SN

Niamey, NG

slide6

Kano, NA

Lagos, NA

slide7

Seasonal Rainfall Performance

Anomaly

Percent Average

  • To date, poor rainfall performance has been observed in central Senegal, southwestern Niger, and local areas of Nigeria.
slide8

Vegetation Conditions

NDVI anomaly

Vegetation Health Index

Source: NESDIS/STAR

  • Both the VHI and NDVI anomaly show relatively poor conditions in central/northern Senegal and southwestern Niger.
slide9

July 2011 rainfall over Ethiopia

Percent average

Total

Below-average rainfall observed across portions of the Gambella, Benishangul-Gumuz, and Tigray regions.

Source: Ethiopian Meteorological Agency

slide11

Last Week

This Week

7 Day

30 Day

slide12

Kassala, SD

Rumbek, SS

slide13

Asmara, ER

Nekemte, ET

alternating wet and dry spells

slide14

Seasonal rainfall Performance

Percent average

Anomaly

slide15

Vegetation Conditions

NDVI anomaly

Vegetation Health Index

Source: NESDIS/STAR

  • Poor conditions were observed throughout central Sudan.
slide16

1200 Z 17 May 2011

IR Satellite Imagery

slide17

GFS 7-day Verification

  • GFS overestimates seasonal rainfall in western Ethiopia.
  • Wet (dry) bias in the Gulf of Guinea (northern half of western Mali, …).
ad