Data & Maps

National Current Conditions

November 29, 2023 - December 5, 2023

Inches of rain improved drought conditions in the South/Southeast. However, some of the eastern areas (Virginia, North Carolina, South Carolina) mostly missed out. The Northwest and Hawaii also received abundant precipitation. For the rest of the country, it was mostly status quo. As of December 5, 2023, 28.85% of the U.S. and Puerto Rico and 34.36% of the lower 48 states are in drought, according to the U.S. Drought Monitor.

28.85%

of the U.S. and 34.36% of the lower 48 states are in drought this week.

4.7%

since last week

8.4%

since last month

245.2 Million

acres of major crops in U.S. are experiencing drought conditions this week.

0.0%

since last week

2.1%

since last month

87.8 Million

people in the U.S. and 86.4 Million in the lower 48 states are affected by drought this week.

5.4%

since last week

7.7%

since last month

U.S. states are experiencing Moderate Drought (D1) or worse this week.

No change

since last week

No change

since last month

Learn More About These Stats

U.S. Drought Monitor

Current Week 1-Week Change

U.S. Drought Monitor

D0 - Abnormally Dry

Abnormally Dry (D0) indicates a region that is going into or coming out of drought, according to the U.S. Drought Monitor. View typical impacts by state.

D1 – Moderate Drought

Moderate Drought (D1) is the first of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.

D2 – Severe Drought

Severe Drought (D2) is the second of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.

D3 – Extreme Drought

Extreme Drought (D3) is the third of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.

D4 – Exceptional Drought

Exceptional Drought (D4) is the most intense drought category, according to the U.S. Drought Monitor. View typical impacts by state.

U.S. Drought Monitor
Value	Map Hex Color	Description
D0	#ffff00	D0 - Abnormally Dry Abnormally Dry (D0) indicates a region that is going into or coming out of drought, according to the U.S. Drought Monitor. View typical impacts by state.
D1	#fcd37f	D1 – Moderate Drought Moderate Drought (D1) is the first of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.
D2	#fa0	D2 – Severe Drought Severe Drought (D2) is the second of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.
D3	#e60000	D3 – Extreme Drought Extreme Drought (D3) is the third of four drought categories (D1–D4), according to the U.S. Drought Monitor. View typical impacts by state.
D4	#730000	D4 – Exceptional Drought Exceptional Drought (D4) is the most intense drought category, according to the U.S. Drought Monitor. View typical impacts by state.

Drought Change Since Last Week

-3

-2

-1

Drought Change Since Last Week
Value	Map Hex Color	Description
-3	#ff9900	3-Category Degradation Drought/dryness has worsened by 3 categories, according to the U.S. Drought Monitor.
-2	#ffd438	2-Category Degradation Drought/dryness has worsened by 2 categories, according to the U.S. Drought Monitor.
-1	#ffff73	1-Category Degradation Drought/dryness has worsened by 1 category, according to the U.S. Drought Monitor.
0	#cccccc	No Change There has been no change in drought conditions at this location.
+1	#cdffd4	1-Category Improvement Drought/dryness has improved by 1 category, according to the U.S. Drought Monitor.
+2	#8ad48c	2-Category Improvement Drought/dryness has improved by 2 categories, according to the U.S. Drought Monitor.
+3	#52956a	3-Category Improvement Drought/dryness has improved by 3 categories, according to the U.S. Drought Monitor.

Data Valid: 12/05/23

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Precipitation Conditions

7-Day 30-Day % Normal 60-Day % Normal

Inches of Precipitation

0.01

0.5

Inches of Precipitation
Range	Map Hex Color	Description
0 - 0.01	#ffffff	This location received less than 0.01 inch of precipitation during this 7-day period.
0.01 - 0.5	#ffffcc	This location received 0.01–0.5 inch of precipitation during this 7-day period.
0.5 - 1	#c7e9b4	This location received 0.5–1 inch of precipitation during this 7-day period.
1 - 2	#7fcdbb	This location received 1–2 inches of precipitation during this 7-day period.
2 - 4	#41b6c4	This location received 2–4 inches of precipitation during this 7-day period.
4 - 6	#1d91c0	This location received 4–6 inches of precipitation during this 7-day period.
6 - 8	#225ea8	This location received 6–8 inches of precipitation during this 7-day period.
8 -	#0c2c84	This location received more than 8 inches of precipitation during this 7-day period.

Percent of Normal Precipitation (%)

25%

50%

75%

100%

Percent of Normal Precipitation (%)
Range	Map Hex Color	Description
0% - 25%	#8c510a	Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020.
25% - 50%	#bf812d	25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020.
50% - 75%	#dfc27d	50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020.
75% - 100%	#f6e8c3	75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020.

100%

150%

200%

300%


Range	Map Hex Color	Description
100% - 150%	#c7eae5	100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020.
150% - 200%	#80cdc1	150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020.
200% - 300%	#35978f	200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020.
300% -	#01665e	>300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020.

Percent of Normal Precipitation (%)

25%

50%

75%

100%

Percent of Normal Precipitation (%)
Range	Map Hex Color	Description
0% - 25%	#8c510a	Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020.
25% - 50%	#bf812d	25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020.
50% - 75%	#dfc27d	50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020.
75% - 100%	#f6e8c3	75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020.

100%

150%

200%

300%


Range	Map Hex Color	Description
100% - 150%	#c7eae5	100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020.
150% - 200%	#80cdc1	150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020.
200% - 300%	#35978f	200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020.
300% -	#01665e	>300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020.

Data Valid: 12/07/23

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Temperature Conditions

7-Day Avg 7-Day Anomaly 30-Day Anomaly

Maximum Temperature (°F)

Maximum Temperature (°F)
Range	Map Hex Color	Description
- 0	#05346c	The 7-day average daily maximum temperature is below 0°F.
0 - 10	#216cac	0–10°F The 7-day average daily maximum temperature is between 0–10°F.
10 - 20	#4393c3	10–20°F The 7-day average daily maximum temperature is between 10–20°F.
20 - 30	#92c5de	20–30°F The 7-day average daily maximum temperature is between 20–30°F.
30 - 40	#d1e5f0	30–40°F The 7-day average daily maximum temperature is between 30–40°F.
40 - 60	#ffffff	40–60°F The 7-day average daily maximum temperature is between 40–60°F.

100


Range	Map Hex Color	Description
60 - 70	#fddbc7	60–70°F The 7-day average daily maximum temperature is between 60–70°F.
70 - 80	#f4a582	70–80°F The 7-day average daily maximum temperature is between 70–80°F.
80 - 90	#d6604d	80–90°F The 7-day average daily maximum temperature is between 80–90°F.
90 - 100	#b2182b	90–100°F The 7-day average daily maximum temperature is between 90–100°F.
100 -	#69012c	>100°F The 7-day average daily maximum temperature is between greater than 100°F.

Departure from Normal Max Temperature (°F)

-8

-6

-4

-3

-1

Departure from Normal Max Temperature (°F)
Range	Map Hex Color	Description
- -8	#0404ff	>8°F Below Normal The average maximum temperature was more than 8°F colder than normal for this location.
-8 - -6	#2166ac	6–8°F Below Normal The average maximum temperature was 6–8°F colder than normal for this location.
-6 - -4	#4393c3	4–6°F Below Normal The average maximum temperature was 4–6°F colder than normal for this location.
-4 - -3	#92c5de	3–4°F Below Normal The average maximum temperature was 3–4°F colder than normal for this location.
-3 - -1	#d1e5f0	1–3°F Below Normal The average maximum temperature was 1–3°F colder than normal for this location.
-1 - 0	#ffffff	0–1°F Below Normal The average maximum temperature was 0–1°F colder than normal for this location.


Range	Map Hex Color	Description
0 - 1	#ffffff	0–1°F Above Normal The average maximum temperature was 0–1°F warmer than normal for this location.
1 - 3	#fddbc7	1–3°F Above Normal The average maximum temperature was 1–3°F warmer than normal for this location.
3 - 4	#f4a582	3–4°F Above Normal The average maximum temperature was 3–4°F warmer than normal for this location.
4 - 6	#d6604d	4–6°F Above Normal The average maximum temperature was 4–6°F warmer than normal for this location.
6 - 8	#b2182b	6–8°F Above Normal The average maximum temperature was 6–8°F warmer than normal for this location.
8 -	#800000	>8°F Above Normal The average maximum temperature was more than 8°F warmer than normal for this location.

Departure from Normal Max Temperature (°F)

-8

-6

-4

-3

-1

Departure from Normal Max Temperature (°F)
Range	Map Hex Color	Description
- -8	#0404ff	>8°F Below Normal The average maximum temperature was more than 8°F colder than normal for this location.
-8 - -6	#2166ac	6–8°F Below Normal The average maximum temperature was 6–8°F colder than normal for this location.
-6 - -4	#4393c3	4–6°F Below Normal The average maximum temperature was 4–6°F colder than normal for this location.
-4 - -3	#92c5de	3–4°F Below Normal The average maximum temperature was 3–4°F colder than normal for this location.
-3 - -1	#d1e5f0	1–3°F Below Normal The average maximum temperature was 1–3°F colder than normal for this location.
-1 - 0	#ffffff	0–1°F Below Normal The average maximum temperature was 0–1°F colder than normal for this location.


Range	Map Hex Color	Description
0 - 1	#ffffff	0–1°F Above Normal The average maximum temperature was 0–1°F warmer than normal for this location.
1 - 3	#fddbc7	1–3°F Above Normal The average maximum temperature was 1–3°F warmer than normal for this location.
3 - 4	#f4a582	3–4°F Above Normal The average maximum temperature was 3–4°F warmer than normal for this location.
4 - 6	#d6604d	4–6°F Above Normal The average maximum temperature was 4–6°F warmer than normal for this location.
6 - 8	#b2182b	6–8°F Above Normal The average maximum temperature was 6–8°F warmer than normal for this location.
8 -	#800000	>8°F Above Normal The average maximum temperature was more than 8°F warmer than normal for this location.

Data Valid: 12/07/23

Learn More

Multi-Indicator Drought Index (MIDI)

Short-Term Long-Term

Dry Conditions

Dry Conditions
Value	Map Hex Color	Description
D4	#730000	Exceptional Drought (0–2nd Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 98% to 100% of past conditions. Learn more about these categories.
D3	#E60000	Extreme Drought (2nd–5th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 95% to 98% of past conditions. Learn more about these categories.
D2	#FFAA00	Severe Drought (5th–10th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 90% to 95% of past conditions. Learn more about these categories.
D1	#FCD37F	Moderate Drought (10th–20th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 80% to 90% of past conditions. Learn more about these categories.
D0	#FFFF00	Abnormally Dry (20th–30th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 70% to 80% of past conditions. Learn more about these categories.

Wet Conditions

Wet Conditions
Value	Map Hex Color	Description
W0	#AAFF55	Abnormally Wet (70th–80th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 70% to 80% of past conditions. Learn more about these categories.
W1	#01FFFF	Moderate Wet (80th–90th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 80% to 90% of past conditions. Learn more about these categories.
W2	#00AAFF	Severe Wet (90th–95th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 90% to 95% of past conditions. Learn more about these categories.
W3	#0000FF	Extreme Wet (95th–98th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 95% to 98% of past conditions. Learn more about these categories.
W4	#0000AA	Exceptional Wet (98th–100th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 98% to 100% of past conditions. Learn more about these categories.

Dry Conditions

Dry Conditions
Value	Map Hex Color	Description
D4	#730000	Exceptional Drought (0–2nd Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 98% to 100% of past conditions. Learn more about these categories.
D3	#E60000	Extreme Drought (2nd–5th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 95% to 98% of past conditions. Learn more about these categories.
D2	#FFAA00	Severe Drought (5th–10th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 90% to 95% of past conditions. Learn more about these categories.
D1	#FCD37F	Moderate Drought (10th–20th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 80% to 90% of past conditions. Learn more about these categories.
D0	#FFFF00	Abnormally Dry (20th–30th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are drier than 70% to 80% of past conditions. Learn more about these categories.

Wet Conditions

Wet Conditions
Value	Map Hex Color	Description
W0	#AAFF55	Abnormally Wet (70th–80th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 70% to 80% of past conditions. Learn more about these categories.
W1	#01FFFF	Moderate Wet (80th–90th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 80% to 90% of past conditions. Learn more about these categories.
W2	#00AAFF	Severe Wet (90th–95th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 90% to 95% of past conditions. Learn more about these categories.
W3	#0000FF	Extreme Wet (95th–98th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 95% to 98% of past conditions. Learn more about these categories.
W4	#0000AA	Exceptional Wet (98th–100th Percentile) This map integrates multiple drought indices measuring precipitation and moisture into one computer-generated drought map, with a reference period of 1979–present. According to these indices, current conditions are wetter than 98% to 100% of past conditions. Learn more about these categories.

The Multi-Indicator Drought Index (MIDI) looks at current drought conditions across the U.S. by integrating several key drought indices on precipitation and moisture into one objective, computer-generated map.

The Short-Term MIDI approximates drought impacts from changes in precipitation and moisture over a short-term timeframe (looking back up to 90 days), such as impacts to non-irrigated agriculture, topsoil moisture, and range and pasture conditions. Long-term droughts (lasting months to years) can have different impacts.

This experimental map is based on methodology from the NOAA National Weather Service’s Climate Prediction Center. Learn how this map is made.

The Long-Term MIDI approximates drought impacts from changes in precipitation and moisture over a long-term timeframe (up to 5 years), such as impacts to irrigated agriculture, groundwater, and reservoir levels. Long-term drought conditions can also increase wildfire intensity and severity.

This experimental map is based on methodology from the NOAA National Weather Service’s Climate Prediction Center. Learn how this map is made.

Source(s):

UC Merced, via Climate Engine

Source(s):

UC Merced, via Climate Engine

Data Valid: 12/01/23

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Experimental

Palmer Drought Severity Index (PDSI)

Current PDSI

Dry Conditions

-5

-4

-3

-2

-1

Dry Conditions
Range	Map Hex Color
- -5	#730000
-5 - -4	#e60000
-4 - -3	#ffaa00
-3 - -2	#fcd37f
-2 - -1	#ffff00

Wet Conditions

Wet Conditions
Range	Map Hex Color
1 - 2	#aaff55
2 - 3	#01ffff
3 - 4	#00aaff
4 - 5	#00f
5 -	#00a

Data Valid: 12/01/23

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Experimental

Evaporative Demand Drought Index (EDDI)

1-Week 1-Month 3-Month

Drought Conditions

ED4

ED3

ED2

ED1

ED0

Drought Conditions
Value	Map Hex Color	Description
ED4	#730000	Exceptional Drought (98th–100th Percentile) Compared to "normal" conditions, evaporative demand is greater than 98% to 100% of historical values. Learn more about these categories.
ED3	#E60000	Extreme Drought (95th–98th Percentile) Compared to "normal" conditions, evaporative demand is greater than 95% to 98% of historical values. Learn more about these categories.
ED2	#FFAA00	Severe Drought (90th–95th Percentile) Compared to "normal" conditions, evaporative demand is greater than 90% to 95% of historical values. Learn more about these categories.
ED1	#FCD37F	Moderate Drought (80th–90th Percentile) Compared to "normal" conditions, evaporative demand is greater than 80% to 90% of previous values. Learn more about these categories.
ED0	#FFFF00	Abnormally Dry (70th–80th Percentile) Compared to "normal" conditions, evaporative demand is greater than 70% to 80% of historical values. Learn more about these categories.

Wet Conditions

EW0

EW1

EW2

EW3

EW4

Wet Conditions
Value	Map Hex Color	Description
EW0	#AAFF55	Abnormally Wet (20th–30th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 20% to 30% of historical values (i.e., only 20%–30% of previous values had lower evaporative demand). Learn more about these categories.
EW1	#01FFFF	Moderate Wet (10th–20th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 10% to 20% of historical values (i.e., only 10%–20% of previous values had lower evaporative demand). Learn more about these categories.
EW2	#00AAFF	Severe Wet (5th–10th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 5% to 10% of historical values (i.e., only 5%–10% of previous values had lower evaporative demand). Learn more about these categories.
EW3	#0000FF	Extreme Wet (2nd–5th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 2% to 5% of historical values (i.e., only 2%–5% of previous values had lower evaporative demand). Learn more about these categories.
EW4	#0000AA	Exceptional Wet (0–2nd Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 0% to 2% of historical values (i.e., less than 2% of previous values had lower evaporative demand). Learn more about these categories.

Drought Conditions

ED4

ED3

ED2

ED1

ED0

Drought Conditions
Value	Map Hex Color	Description
ED4	#730000	Exceptional Drought (98th–100th Percentile) Compared to "normal" conditions, evaporative demand is greater than 98% to 100% of historical values. Learn more about these categories.
ED3	#E60000	Extreme Drought (95th–98th Percentile) Compared to "normal" conditions, evaporative demand is greater than 95% to 98% of historical values. Learn more about these categories.
ED2	#FFAA00	Severe Drought (90th–95th Percentile) Compared to "normal" conditions, evaporative demand is greater than 90% to 95% of historical values. Learn more about these categories.
ED1	#FCD37F	Moderate Drought (80th–90th Percentile) Compared to "normal" conditions, evaporative demand is greater than 80% to 90% of previous values. Learn more about these categories.
ED0	#FFFF00	Abnormally Dry (70th–80th Percentile) Compared to "normal" conditions, evaporative demand is greater than 70% to 80% of historical values. Learn more about these categories.

Wet Conditions

EW0

EW1

EW2

EW3

EW4

Wet Conditions
Value	Map Hex Color	Description
EW0	#AAFF55	Abnormally Wet (20th–30th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 20% to 30% of historical values (i.e., only 20%–30% of previous values had lower evaporative demand). Learn more about these categories.
EW1	#01FFFF	Moderate Wet (10th–20th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 10% to 20% of historical values (i.e., only 10%–20% of previous values had lower evaporative demand). Learn more about these categories.
EW2	#00AAFF	Severe Wet (5th–10th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 5% to 10% of historical values (i.e., only 5%–10% of previous values had lower evaporative demand). Learn more about these categories.
EW3	#0000FF	Extreme Wet (2nd–5th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 2% to 5% of historical values (i.e., only 2%–5% of previous values had lower evaporative demand). Learn more about these categories.
EW4	#0000AA	Exceptional Wet (0–2nd Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 0% to 2% of historical values (i.e., less than 2% of previous values had lower evaporative demand). Learn more about these categories.

Drought Conditions

ED4

ED3

ED2

ED1

ED0

Drought Conditions
Value	Map Hex Color	Description
ED4	#730000	Exceptional Drought (98th–100th Percentile) Compared to "normal" conditions, evaporative demand is greater than 98% to 100% of historical values. Learn more about these categories.
ED3	#E60000	Extreme Drought (95th–98th Percentile) Compared to "normal" conditions, evaporative demand is greater than 95% to 98% of historical values. Learn more about these categories.
ED2	#FFAA00	Severe Drought (90th–95th Percentile) Compared to "normal" conditions, evaporative demand is greater than 90% to 95% of historical values. Learn more about these categories.
ED1	#FCD37F	Moderate Drought (80th–90th Percentile) Compared to "normal" conditions, evaporative demand is greater than 80% to 90% of previous values. Learn more about these categories.
ED0	#FFFF00	Abnormally Dry (70th–80th Percentile) Compared to "normal" conditions, evaporative demand is greater than 70% to 80% of historical values. Learn more about these categories.

Wet Conditions

EW0

EW1

EW2

EW3

EW4

Wet Conditions
Value	Map Hex Color	Description
EW0	#AAFF55	Abnormally Wet (20th–30th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 20% to 30% of historical values (i.e., only 20%–30% of previous values had lower evaporative demand). Learn more about these categories.
EW1	#01FFFF	Moderate Wet (10th–20th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 10% to 20% of historical values (i.e., only 10%–20% of previous values had lower evaporative demand). Learn more about these categories.
EW2	#00AAFF	Severe Wet (5th–10th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 5% to 10% of historical values (i.e., only 5%–10% of previous values had lower evaporative demand). Learn more about these categories.
EW3	#0000FF	Extreme Wet (2nd–5th Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 2% to 5% of historical values (i.e., only 2%–5% of previous values had lower evaporative demand). Learn more about these categories.
EW4	#0000AA	Exceptional Wet (0–2nd Percentile) Compared to "normal" conditions, current evaporative demand is in the bottom 0% to 2% of historical values (i.e., less than 2% of previous values had lower evaporative demand). Learn more about these categories.

The Evaporative Demand Drought Index (EDDI) is a drought monitoring tool that shows the anomaly in daily evaporative demand over a given period time. Evaporative demand is the atmospheric influence on the drying of the landscape, or "the thirst of the atmosphere." Unusually high evaporative demand can lead to moisture stress on the land surface, and ultimately to drought—even when precipitation has been near-normal.

EDDI can serve as an indicator of both rapidly evolving "flash" droughts and sustained droughts and can offer early warning of agricultural drought, hydrologic drought, and fire-weather risk.

The Drought.gov team produces this EDDI product with the Climate Engine tool and the GridMET daily dataset, using a 1991-2020 reference period, nonparametric distribution, and Penman-Monteith PET (potential evapotranspiration).

Download: GeoTIFF / XYZ Tiles

EDDI can serve as an indicator of both rapidly evolving "flash" droughts and sustained droughts and can offer early warning of agricultural drought, hydrologic drought, and fire-weather risk.

Download: GeoTIFF / XYZ Tiles

EDDI can serve as an indicator of both rapidly evolving "flash" droughts and sustained droughts and can offer early warning of agricultural drought, hydrologic drought, and fire-weather risk.

Download: GeoTIFF / XYZ Tiles

Source(s):

Climate Engine, GridMET

Source(s):

Climate Engine, GridMET

Source(s):

Climate Engine, GridMET

Last Updated: 12/07/23

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Evaporative Demand Drought Index (EDDI)

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