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Drought Information Statement - last updated January 18, 2014

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Drought Monitor Graphics


Wyoming Drought Monitor
Drought Monitor for Wyoming
12 Week Animation
Seasonal Drought Outlook
Drought Monitor - 12 Week Animation
Seasonal Drought Outlook - Click to Enlarge
2012 - The Onset of Drought
Palmer (long-term) Drought Index
2012 - The Onset of Drought (One Year Animation) - Click to Enlarge
Palmer (long-term) Drought Index - Click to Enlarge

Drought Monitor Classification Changes
Long Term Drought Trends 1958-2007
1 Month
2014
Drought Classification Change - 1 Month
Drought Classification Change - 2014
Water Year (Since 10/1/2013)
Last 1 Year
Drought Classification Change - Current Water Year
Drought Classification Change - 1 Year
Long Term Drought Trends 1958-2007 -Click to enlarge

  Drought Severity Classifications

 

Ranges

Category

Description

Possible Impacts

Palmer Drought Index

CPC Soil
Moisture Model
(Percentiles)

USGS Weekly Streamflow
(Percentiles)

Standardized Precipitation Index (SPI)

Objective Short and Long-term Drought Indicator Blends (Percentiles)

D0

Abnormally
Dry

Going into drought: short-term dryness slowing planting, growth of crops or pastures. Coming out of drought: some lingering water deficits;  pastures or crops not fully recovered

-1.0 to -1.9

21-30

21-30

-0.5 to -0.7

21-30

D1

Moderate Drought

Some damage to crops, pastures; streams, reservoirs, or wells low, some water shortages developing or imminent; voluntary water-use restrictions requested

-2.0 to -2.9

11-20

11-20

-0.8 to -1.2

11-20

D2

Severe
Drought

Crop or pasture losses likely;  water shortages common; water restrictions imposed

-3.0 to -3.9

6-10

6-10

-1.3 to -1.5

6-10

D3

Extreme Drought

Major crop/pasture losses;  widespread water shortages or restrictions

-4.0 to -4.9

3-5

3-5

-1.6 to -1.9

3-5

D4

Exceptional Drought

Exceptional and widespread crop/pasture losses; shortages of water in reservoirs, streams, and wells creating water emergencies

-5.0 or less

0-2

0-2

-2.0 or less

0-2

 

Drought Monitoring Tools
Crop Moisture Index
One Month SPEI
WY Surface Supply Water Index
Grace-based Soil Moisture
Crop Moisture Index - Click to Enlarge
One Month Standardized Precipitation Evapotranspiration Index (SPEI) - Click to Enlarge
Wyoming Surface Water Supply Index - Click to Enlarge
Grace-based Surface Soil Moisture - Click to Enlarge
Soil Moisture Percentiles
6 Month SPEI
Evaporative Stress Index
Vegetation Drought Response Index
Soil Moisture Percentiles - Click to Enlarge
6 Month Standardized Precipitation Evapotranspiration Index (SPEI) - Click to Enlarge
Evaporative Stress Index - Click to Enlarge
Vegetation Drought Response Index - Click to Enlarge

More Information:

 


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