December Rainfall Summary

 

Parish Mean Rainfall and Comparison with 30-yr Averages

  DEC DEC DEC % OF 30 YR NORMAL
Parishes KEY 2019 2018 30 YR NORMAL (1971-2000) 2019 2019 2019
OCT NOV DEC
Hanover HAN 120 46 90 71 55 133
Westmoreland WES 136 42 74 85 64 183
Manchester MAN 91 71 58 82 84 156
St. Elizabeth STE 99 43 60 56 113 165
Clarendon CLA 75 34 49 98 111 153
St. Catherine STC 44 65 62 88 74 71
Trelawny TRE 104 42 116 142 108 90
St. James STJ 82 72 96 104 56 85
St. Ann STA 92 80 117 56 79 79
St. Mary STM 124 101 209 44 47 59
Portland POR 277 283 366 74 39 76
St. Thomas STT 128 94 116 93 35 110
Kgn. & St. And. KSA 36 31 79 64 103 45
   
Jamaica JAM 108 77 115 80 65 94

Table 1:  Parish Mean Rainfall

Parish Standard Precipitation Index (SPI) Assessment

Observed SPI for September to December 2019

Parishes Sep/Oct Oct/Nov Nov/Dec
Westmoreland -0.41 -0.60 0.59
St. Elizabeth 0.56 0.32 1.86
Manchester 0.46 -0.30 0.45
Clarendon 0.60 0.40 0.66
St. Catherine 0.90 -0.37 -0.65
Kingston & St. Andrew -0.17 -0.27 -0.39
St. Thomas -0.12 -0.36 -0.63
Portland -1.00 -1.36 -1.40
St. Mary -1.10 -1.22 -1.20
St. Ann -0.02 -0.72 -0.61
Trelawny 1.96 0.62 0.12
St. James -0.48 -0.22 -0.61
Hanover -0.84 -0.70 0.04

Table 2:  Parish SPI for September to December 2019

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.