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Climate Section

 

Belize Drought Outlook

 

 

Drought Outlook ( 6 Month's SPI outlook May 2016 to  October 2016)

July Update (Using the data up to June 2016)

 Drought Update: There is No Drought Concern, for the Entire Country as seen on the map below.

6 month drought outlook

 Long Term Drought Outlook  

1.This 12-month SPI-based drought outlook uses observations until June 2016, with potential impacts on large surface water reserves and groundwater. In general, impacts are expected if the 12-month SPI is ≤-1.3 (very dry or worse – ref.: CDPMN).

 

 Drought Outlook ( 12 Month's SPI outlook February 2016 to  January 2017)

 

July Update (Using the data up to June 2016)

 

 Drought Update: There is  No Drought Concern, for the Entire Country as seen on the map below.

 

 12 month drought outlook

 Current Drought Situation:

Because of the way Above Normal rainfall that occurred over most areas of the country in  June of 2016 as seen on the graph and maps below,  the drought outlook shows that there is NO Drought Concern over the Entire country over the six months SPI (May2016 to October 2016 ) and the 12 months SPI (February 2016 to January 2017).

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 june 2016 obs rainfalljune 2016 obs rainfall percent

 

 

Forecast Drought Condition for Belize is done by using Standardized Precipitation Index (SPI)

 

The Standardised Precipitation Index (SPI), developed by T.B. Mckee, N.J. Doesken and J. Kleist (McKee et al. 1993) of Colorado State University is an index that, if used carefully, can provide early warning of an extended drought period and aid in assessing drought severity. It can also provide similar information at the other end of the spectrum- extremely high precipitation. SPI is basically a representation of rainfall in units of standard deviation. Positive values indicate greater than median rainfall; negative values indicate less than median rainfall. Belize is now using this tool for early drought warning.

 

Table SPI classification (CIMH)

 

SPI Value

Category

Spi Value

Impact

-0.50 to -0.01

Normal

0.50 to 0.01

Normal

-0.80 to -0.51

Abnormally dry

0.80 to 0.51

Abnormally wet

-1.30 to -0.81

Moderately dry

1.30 to 0.81

Moderately wet

-1.60 to -1.31

Severely dry

1.60 to 1.31

very wet

-2.00 to -1.61

Extremely dry

2.00 to 1.61

Extremely wet

= -2.01

Exceptionally dry

= -2.01

Exceptionally wet

 

 

 

A three-month SPI analysis reflects short to medium term moisture and can give an indication of available moisture conditions at the beginning of the growing season. A six-month SPI analysis reflects medium term trends in rainfall and is effective in showing rainfall distribution over distinct seasons as well as being associated with anomalous stream flows and reservoir levels, which takes longer to manifest itself than does agricultural drought. A twelve-month SPI can indicate the potential periods of shortfall in groundwater amounts. 

 

 

Disclaimer

The information contained herein is provided with the understanding that The National Meteorological Service of Belize makes no warranties, either expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this statement. The information may be used freely by the public with appropriate acknowledgement of its source, but shall not be modified in content and then presented as original material.

 

Next Drought Statement will be issued by 1st week of  September 2016

 

If you have quires or comments please email Climate Section at the National Meteorological service at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .