January Rainfall Summary

 


Parish Standard Precipitation Index (SPI) Assessment

Parish Mean Rainfall and Comparison with 30-yr Averages

  JAN JAN JAN % OF 30 YR NORMAL
Parishes KEY 2020 2019 30 YR NORMAL (1971-2000) 2019 2019 2020
NOV DEC JAN
Westmoreland WES 40 77 70 64 185 57
St. Elizabeth STE 21 52 66 123 170 32
Manchester MAN 67 73 61 79 156 109
Clarendon CLA 33 40 45 106 153 75
St. Catherine STC 12 66 53 74 80 23
Kingston & St. Andrew (KSA) KSA 12 50 70 103 45 17
St. Thomas STT 43 49 94 35 105 45
Portland POR 176 128 346 40 83 51
St. Mary STM 172 74 181 47 59 95
St. Ann STA 132 60 106 75 76 125
Trelawny TRE 105 113 92 108 90 114
St. James STJ 67 100 67 58 84 100
Hanover HAN 47 65 94 50 133 50
   
Jamaica JAM 71 73 103 66 96 69

Table 1:  Parish Mean Rainfall

 

Observed SPI for October 2019 to January 2020

Parishes Oct/Nov Nov/Dec Dec/Jan
Westmoreland -0.60 0.56 1.00
St. Elizabeth 0.09 1.68 0.76
Manchester -0.30 0.45 0.68
Clarendon 0.38 0.66 0.71
St. Catherine -0.37 -0.65 -1.19
Kingston & St. Andrew -0.27 -0.39 -0.92
St. Thomas -0.36 -0.63 -0.31
Portland -1.33 -1.41 -1.09
St. Mary -1.22 -1.20 -0.37
St. Ann -0.72 -0.61 -0.08
Trelawny 0.62 0.12 0.34
St. James -0.22 -0.61 -0.56
Hanover -0.70 0.04 0.31

Table 2:  Parish SPI for October 2019 to January 2020

 

SPI Data Used In Jamaica Drought Monitor

SPI Value Category   SPI Value Category
0.00 to -0.50  Near-normal (dry)   0.00 to 0.50  Near-normal  (wet)
-0.51 to -0.79  Abnormally Dry   0.51 to 0.79  Abnormally Wet
-0.80 to -1.29  Moderately Dry 0.80 to 1.29  Moderately Wet
-1.30 to -1.59  Severely Dry 1.30 to 1.59  Severely Wet
-1.60 to -1.99  Extremely Dry 1.60 to 1.99  Extremely Wet
-2.00 or less  Exceptionally Dry 2.00 or more Exceptionally Wet

Table 3:  SPI Category Chart.