Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 9/21/2017 Drought Conditions Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 9/21/2017

Into the 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 14th Driest (Record History: 137 years) 6 Grand Forks 35th Driest (Record History: 125 years) 20 Bismarck 47th Driest (Record History: 143 years) 11 Williston 39th Driest (Record History: 124 years) 16 Minot 10th Driest (Record History: 113 years) 4 Bowman 7th Driest (Record History: 103 years) 3 Crosby 9th Driest (Record History: 111 years) 2 Bottineau 38nd Driest (Record History: 121 years) 12

Precipitation Accumulation Since June 1 in Select Locations in ND (Ranking) Precipitation Totals Since March 1st Weekly Change Fargo 17th Driest (Record History: 137 years) 1 Grand Forks 66th Driest (Record History: 125 years) 37 Bismarck 54th Wettest (Record History: 143 years) 4 Williston 68th Driest (Record History: 124 years) 24 Minot 18th Driest (Record History: 113 years) 12 Bowman 9nd Driest (Record History: 103 years) 7 Crosby 13th Driest (Record History: 111 years) 8 Bottineau 48nd Driest (Record History: 121 years) 20

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 87% (-6) DO 100% (+2) D4 <1% (0) D3 3% (-15) <1% (-2) D2 33% (-16)

State Coverage and Intensity

Drought Change One-week Change 4-week Change

State Coverage and Intensity (Time Scale) 329 (Aug 8, 2006) 295 (Aug 8, 2017) 224 (-35) *Drought Severity and Coverage Index = DOx1+D1x2+D2x3+D3x4+D4x5 *Akyuz (2007)

7-day Forecast Mon 7am, Sep 21 through Mon 7am, Sep 28 Mostly this weekend Mon 7am, Sep 21 through Mon 7am, Sep 28

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

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

Cass County Corn GDD Accumulation and Projection Average First Hard Freeze Date Oct. 9 Assumptions: Location: Cass Corn: 90-Day Plant. Date: 5/10 Freeze: 28°F Estimated Maturity Date Oct. 4 Historic Earliest First Hard Freeze Date Sep 20, 1995 Historic Latest First Hard Freeze Date Nov 3, 1998 See: https://hprcc.unl.edu/gdd.php to generate graphs for other locations