Rainfall Summary

 


Parish Standard Precipitation Index (SPI) Assessment

Parish Mean Rainfall and Comparison with 30-yr Averages

FEB FEB FEB % OF 30 YR NORMAL
Parishes KEY 2020 2019 30 YR NORMAL (1971-2000) 2019 2020 2020
DEC JAN FEB
Westmoreland WES 61 57 80 185 54 76
St. Elizabeth STE 47 30 78 170 32 60
Manchester MAN 55 22 64 156 109 86
Clarendon CLA 46 23 40 153 44 113
St. Catherine STC 20 34 55 80 21 37
Kingston & St. Andrew (KSA) KSA 7 25 72 45 17 9
St. Thomas STT 76 57 81 105 47 94
Portland POR 312 112 264 83 57 118
St. Mary STM 176 50 136 59 95 129
St. Ann STA 112 31 82 76 126 137
Trelawny TRE 61 134 83 90 104 73
St. James STJ 78 32 59 84 100 131
Hanover HAN 42 67 109 133 50 38
Jamaica JAM 84 48 93 96 70 91

Table 1: Parish Mean Rainfall

 

Observed SPI for November 2019 to February 2020

Parishes Nov/Dec Dec/Jan Jan/Feb
Westmoreland 0.59 1.00 -0.07
St. Elizabeth 1.68 0.76 -0.76
Manchester 0.45 0.68 0.26
Clarendon 0.66 0.44 0.08
St. Catherine -0.43 -0.88 -1.91
Kingston & St. Andrew -0.39 -0.91 -1.24
St. Thomas -0.64 -0.30 -0.30
Portland -1.42 -1.00 -0.29
St. Mary -1.20 -0.39 0.71
St. Ann -0.61 -0.02 0.66
Trelawny 0.34 0.38 0.39
St. James -0.61 -0.19 0.00
Hanover 0.04 0.31 -0.79

Table 2: Parish SPI for November 2019 to February 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.