1. ND Weekly Drought Update
Adnan Akyuz, Ph.D.
NDSU, AES
State Climatologist
Updated 4/26/2018

2. Divisional Precipitation Anomalies and Rankings
Winter : December-February
March 2018 1”
123th
0.66”
117th
0.12”
82nd
0.94”
122th
0.59”
111th
0.71”
111th
0.21”
89th
0.54”
108th
0.92”
112th
Negative numbers indicate drier than long-term ( ) average.
Lower rankings indicate historically drier conditions on record (124 years total).

3. Divisional Temperature Anomalies and Rankings
Winter : December-February
March 2018
-0.8F
56th
1.3F
75th
2.4F
85th
-0.4F
60th
0.6F
71st
0.5F
71st
-0.7F
53rd
0.2F
69th 0F
68th
Negative numbers indicate cooler than long-term ( ) average.
Lower rankings indicate historically cooler conditions on record (124 years total).

4. 30-Day Precipitation
Total Accumulation
% of Normal

5. Long Term Precipitation % of Normal
60 Days
90 Days

6. (% Change from previous week)
Cumulative % area
(% Change from previous week) D1
39%
(0%)
None
35%
(0%) DO
65%
(0%)

7. State Coverage and Intensity

8. Drought Change
One-week Change
4-week Change

9. Drought Severity and Coverage Index (Statewide)
329
(Aug 8, 2006)
295
(Aug 8, 2017)
104
(0)
*Drought Severity and Coverage Index = DOx1+D1x2+D2x3+D3x4+D4x5
*Akyuz (2007)

10. Accumulated Drought Severity and Coverage Index (Statewide)
8677
(+104)
9,530
10,642
9653
19,319
2116
1714
*Numbers indicate the area under the DSCI Index Curve
*Akyuz (2017)

11. Soil Moisture and Bare Soil Temperature
Soil Moisture Departure from Normal
Bare Soil Temperature at 4” Depth
(20mm = 0.8”)

12. Deep Soil Temperatures (NDAWN)

13. Replanting or Late Planting Crops*
*Kandel and Ransom, 2015, NDSU

14. Corn Growing Degree Day Tool
Black Layer
Sept 13
Silking
July 20
Avg Freeze
Oct 4
Avg Freeze
May 4

15. 7-day GFS Forecast* Thu 1am, Apr 26 through Thu 1am, May 3
*College of DuPage
Next Generation Weather Lab (Displayed with permission)

16. 14-day GFS Forecast* Thu 1am, Apr 26 through Thu 1am, May 10
*College of DuPage
Next Generation Weather Lab (Displayed with permission)

17. Medium Range Forecast
Week 3-4 Precipitation
Week 3-4 Temperature

18. 3-Month Outlook: May-June-July
Precipitation
Temperature