DROUGHT INDEX TABLE VALUES
PALMER
3.0 and above Extreme
moist spell
3.0 to 3.99 Very
moist spell
2.0 to 2.99 Unusual
moist spell
1.0 to 1.99 Moist
spell
0.50 to 0.99 Incipient
moist spell (beginning)
0.49 to -0.49 Near
normal
-0.50 to -0.99 Incipient
drought (beginning)
-1.0 to -1.99 Mild
drought
-2.0 to -2.99 Moderate
drought
-3.0 to -3.99 Severe
drought
-4.0 and below Extreme
drought
CROP
(1)When
the index increased or did not change from the previous week
3.0 and
above Excessively
wet, some field flooded
2.0 to 2.99 Too
wet, some standing water
1.0 to 1.99 Prospects
above normal, some fields too wet
0 to
0.99
Moisture adequate for
present needs
0 to -0.99
Prospects improved but rain
still needed
-1.0 to -1.99 Some
improvement but still too dry
-2.0 to -2.99 Drought
eased but still serious
-3.0 to -3.99 Drought
continues, rain urgently needed
-4.0 and below Not
enought rain, still extremely dry
(2)When
the index decreased
3.0 and above Some
drying but still excessively wet
2.0 to 2.99 More
dry weather needed, work delayed
1.0 to 1.99 Favorable,
except still too wet in spots
0 to
0.99
Favorable for normal growth
and fieldwork
0 to -0.99
Topsoil moisture short,
germination slow
-1.0 to -1.99 Abnormally
dry, prospects deteriorating
-2.0 to -2.99 Two
dry, yield prospects reduced
-3.0 to -3.99 Potential
yeilds severely cut by drought
-4.0 and below Extremely
dry, most crops ruined
(3)Final
Index/Monthly Moisture Anomaly Index
3.50 and above Extreme
wetness
2.5 to 3.49 Severe
wetness
1.00 to 2.49 Mild
to moderate wetness
-1.24 to 0.99 Near
normal
-1.99 to -1.25 Mild
to moderate drought
-2.74 to -2.00 Severe
drought
-2.75 and below Extreme
drought
|