Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 9/11/2017 Drought Conditions Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 9/11/2017

Prelude to Drought 2017 for ND Period Precipitation Ranking Fall 2016 14th Wettest Winter 2016-17 6th Wettest September through February 9th Wettest 6-mo Period March 2017 48th Driest April 2017 34th Driest May 2017 15th Driest Spring 2017 9th Driest Spring June 14th Driest July 11th Driest August 21st Wettest Summer 19th Driest March through August 8th Driest

Precipitation Accumulation Since March 1 in Select Locations in ND (Ranking) Precipitation Totals Since March 1st Weekly Change Fargo 11th Driest (Record History: 137 years) Grand Forks 16th Driest (Record History: 125 years) -2 Bismarck 38th Driest (Record History: 143 years) Williston 24th Driest (Record History: 124 years) -1 Minot 5th Driest (Record History: 113 years) Bowman 4th Driest (Record History: 103 years) Crosby 7th Driest (Record History: 111 years) Bottineau 32nd Driest (Record History: 121 years)

7-Day Rainfall total

30-Day Rainfall Total Accumulation % of Normal

Long Term Precipitation % of Normal 60 Days 90 Days

(% Change from previous week) Cumulative % area (% Change from previous week) D1 66% (0) DO 100% (0) D4 <1% (0) D3 21% (-1) <1% (0) D2 49% (-2)

Drought Change One-week Change 4-week Change

State Coverage and Intensity (Time Scale) *Drought Severity and Coverage Index = DOx1+D1x2+D2x3+D3x4+D4x5 *Akyuz (2007)

State Coverage and Intensity

7-day Forecast Mon 7am, Sep 11 through Mon 7am, Sep 18 Starting on Wednesday Midnight, Intensifying on Thursday AM, Continuing through Saturday Mon 7am, Sep 11 through Mon 7am, Sep 18

Medium Range Forecast 8-14 Day Precipitation 8-14 Day Temperature

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

3-Mounth Outlook (September through November) Precipitation Temperature

Drought Impact Overgrazed Pasture in Hettinger County. Poor Corn Stand in Hettinger County. By Duaine Marxen, NDSU Extension (Sep 1, 2017).

Corn GDD Across the State NDAWN: Based on May 10 Planting

Corn GDD Accumulation and Projection Assumptions: Location: Cass Corn: 90-Day Plant. Date: 5/10 Freeze: 28°F Oct. 9 https://hprcc.unl.edu/gdd.php