ND Weekly Drought Update Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 4/5/2018

Divisional Precipitation Anomalies and Rankings Fall 2017: September-November Winter 2017-18: December-February -0.02” 68th -0.55” 47th -0.47” 30th -0.80” 6th -0.23” 58th -0.52” 25th -0.12” 64th -0.24” 48th -0.80” 49th -0.47” 29th -0.01” 70th -0.26” 48th -0.24” 67th -0.36” 40th -1.13” 29th -0.34” 37th -0.31” 76th -0.48” 29th Negative numbers indicate drier than long-term (1901-2000) average. Lower rankings indicate historically drier conditions on record (134 years total).

Divisional Temperature Anomalies and Rankings Fall 2017: September-November Winter 2017-18: December-February 0.5F 68th 1.0F 76th -0.2F 63rd 1.5F 74th 1.1F 80th 2.1F 78th 0.8F 74th -0.1F 60th 1.2F 80th 1.5F 74th 1.3F 84th 1.0F 69th 0.8F 74th -1.9F 44th 1.3F 84th 0.1F 60th 1.3F 86th 0.9F 70th Negative numbers indicate cooler than long-term (1901-2000) average. Lower rankings indicate historically cooler conditions on record (134 years total).

30-Day Precipitation Total Accumulation % of Normal

Long Term Precipitation % of Normal 60 Days 90 Days

(% Change from previous week) Cumulative % area (% Change from previous week) D1 42% (-7%) None 17% (+8%) D2 5% (1%) DO 83% (-8%)

State Coverage and Intensity

Drought Change One-week Change 4-week Change

Drought Severity and Coverage Index (Statewide) 329 (Aug 8, 2006) 295 (Aug 8, 2017) 129 (-15) *Drought Severity and Coverage Index = DOx1+D1x2+D2x3+D3x4+D4x5 *Akyuz (2007)

Accumulated Drought Severity and Coverage Index (Statewide) 8340 (+129) 9,530 10,642 9653 19,319 2116 1714 *Numbers indicate the area under the DSCI Index Curve *Akyuz (2017)

Soil Moisture and Snowpack Soil Moisture Departure from Normal Snow Water Equivalence 1-2” 0-Trace (20mm = 0.8”)

7-day GFS Forecast* Thu 1am, Apr 5 through Thu 1am, Apr 12 *College of DuPage Next Generation Weather Lab (Displayed with permission)

14-day GFS Forecast* Thu 1am, Apr 5 through Thu 1am, Apr 12 *College of DuPage Next Generation Weather Lab (Displayed with permission)

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

3-Mounth Outlook: April through June Precipitation Temperature