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Wyoming Drought Monitor
Water Year 2017-18 Wyoming Climate Summary
(Wyoming State Climate Office)
Drought Monitor for Wyoming
WRDS 2017-18 Water Year Summary
 
Drought Monitor Graphics
Drought Monitor Classification Changes
12 Week Animation
Seasonal Drought Outlook
Drought Monitor - 12 Week Animation
Seasonal Drought Outlook - Click to Enlarge
2018 - Year-to-Date Animation
Palmer (long-term)
Drought Index
2017 Year-to-Date Animation - Click to Enlarge
Palmer (long-term) Drought Index - Click to Enlarge
1 Month
2018
Drought Classification Change - 1 Month
Drought Classification Change - 2017
Water Year
(Since 10/1/2018)
Last 1 Year
Drought Classification Change - Current Water Year
Drought Classification Change - 1 Year
  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
1-Month Change in
0-5cm Soil Moisture
Grace-based Soil Moisture
 
Crop Moisture Index - Click to Enlarge
 
One Month Standardized Precipitation Evapotranspiration Index (SPEI) - Click to Enlarge
SMAP 1-Month Change in Soil Moisture - Click to Enlarge
Grace-based Surface Soil Moisture - Click to Enlarge
Soil Moisture Percentiles
6 Month SPEI
Quick Drought
Response Index
Vegetation Drought
Response Index
Soil Moisture Percentiles - Click to Enlarge
6 Month Standardized Precipitation Evapotranspiration Index (SPEI) - Click to Enlarge
Quick Drouight Demend Index - Click to Enlarge
Vegetation Drought Response Index - Click to Enlarge
Evaporative Demand Drought Index (EDDI)
1 Week
2 Week
1 Month
1 Week EDDI - Click to Enlarge
2 Week EDDI - Click to Enlarge
1 Month EDDI - Click to Enlarge
3 Month
6 month
12 Month
3 Month EDDI - Click to Enlarge
6-Month EDDI - Click to Enlarge
12 Month EDDI - Click to Enlarge

More Information: