| Drought Monitoring | ![]() |
6.D. TRIGGERING MECHANISMS
The MWG will assess the information and indices discussed above and in combination with other available real-time information determine, as shown in Table 4, the status of drought in each climatic region in New Mexico. Based on the status, the MWG will report its findings to the IAWG and the DTF. (Further detail on the implementation of the plan is found in Section 7)
Table 4 Drought Triggers |
|
| Drought Status | Characteristics for a Single Climate Region |
| Normal | PDSI between -.9 and + 5.0, Six month SPI positive. |
| Advisory (approaching or experiencing incipient drought) | One month or 4 week running average PDSI is between -1.0 and -1.9 but period of less than -1.0 does not exceed 2 months. Six month SPI declining and less than 0.25 for 2 consecutive months. |
| Alert (mild drought) |
PDSI is between -1.0 and -1.9 for greater than 2 months or between -2.0 and -2.9 for 1 month. Six month SPI between 0 and -.99 . |
| Warning (moderate drought) |
PDSI is between -1.0 and -1.9 for
9 months or more, -2.0 to -2.9 for at least 2 months, or -3.0 or less for at least 1
month. Six month SPI declining and between -1.00 and -1.49 . |
| Emergency (severe to extreme drought) |
PDSI is between -2.0 to -2.9 for 9 months or more, -3.0 to -3.9 for at least 2 months, or -4.0 or less for at least 1 month. Six month SPI declining and less than -1.5 . |
| Emergency (drought receding) |
After severe to extreme drought criteria has been met, PDSI improves to greater than -2.0 for 2 consecutive months. Six month SPI turns in positive direction for two consecutive months. |
| Warning (drought receding) |
After criteria for moderate or
worse drought has been met, PDSI improves to greater than -1.5 for 2 consecutive months. Six month SPI rising in positive direction and between -1.00 and -1.49 for two consecutive months. |
| Alert (drought receding) |
After criteria for mild or worse has been met, PDSI improves to greater than -1.0 for 2 consecutive months. Six month SPI rising in positive direction and between 0.0 and -.99 for 2 consecutive months. |
| Advisory (drought receding) |
After criteria for mild or worse drought has been met, PDSI improves to greater than or equal to zero, and the 10 month running total of the PDSI is less than -10.0 . Six month SPI value above zero. |