April Rainfall Summary

 


Parish Standard Precipitation Index (SPI) Assessment

Parish Mean Rainfall and Comparison with 30-yr Averages

  APR APR APR % OF 30 YR NORMAL
Parishes KEY 2020 2019 30 YR NORMAL (1971-2000) 2020 2020 2020
FEB MAR APR
Westmoreland WES 118 183 139 83 47 85
St. Elizabeth STE 43 94 175 61 70 25
Manchester MAN 36 95 168 86 51 21
Clarendon CLA 15 54 68 140 101 22
St. Catherine STC 19 58 91 46 111 21
Kingston & St. Andrew (KSA) KSA 18 61 93 13 50 20
St. Thomas STT 7 52 92 88 58 8
Portland POR 10 88 263 112 207 4
St. Mary STM 23 58 141 113 102 16
St. Ann STA 19 59 93 137 159 20
Trelawny TRE 67 122 89 73 91 75
St. James STJ 39 85 95 139 89 40
Hanover HAN 96 145 153 38 25 63
   
Jamaica JAM 39 89 128 90 100 31

Table 1: Parish Mean Rainfall

 

Observed SPI for January to April 2020

Parishes Jan/Feb Feb/Mar Mar/Apr Change
Westmoreland -0.07 -0.54 -0.69 -0.15
St. Elizabeth -0.79 -0.39 -1.88 -1.49
Manchester 0.26 -0.51 -1.82 -1.31
Clarendon 0.42 0.66 -0.65 -0.99
St. Catherine -1.69 -0.19  -1.00 -0.81
Kingston & St. Andrew -1.17 -0.72 -0.88 -0.16
St. Thomas -0.42 -0.06 -1.37 -1.31
Portland -0.38 1.05 -0.07 -1.12
St. Mary 0.53 0.60 -0.74 -1.34
St. Ann 0.66 0.83 -0.42 -1.45
Trelawny 0.39 -0.01 -0.61 -0.60
St. James 0.00 -0.02 -1.81 -1.79
Hanover -0.79 -1.23 -1.25 -0.02

Table 2: Parish SPI for December 2019 to March 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.