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Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 7/17/2017

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Presentation on theme: "Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 7/17/2017"— Presentation transcript:

1 Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 7/17/2017
Drought Conditions Adnan Akyuz, Ph.D. NDSU, AES State Climatologist Updated 7/17/2017

2 Prelude to Drought 2017 for ND
Period Precipitation Ranking Fall 2016 14th Wettest Winter 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 March-June 7th Driest 4-mo Period

3 Precipitation Accumulation Since March 1 in Select Locations in ND (Ranking)
Precipitation Totals Since March 1st Weekly Change Fargo 16th Driest (Record History: 137 years) Grand Forks 41th Driest (Record History: 125 years) -9 Bismarck 2rd Driest (Record History: 143 years) Williston 8th Driest (Record History: 124 years) -1 Minot 6th Driest (Record History: 113 years) Bowman 4th Driest (Record History: 103 years)

4 90-Day % of Normal Rain

5 30-Day % of Normal Rain

6 (% Change from previous week)
Cumulative % area (% Change from previous week) 73% (+6) 94% (0) 6% (0) 55% (+8) 36% (+6.5)

7 Rainfall Totals Since Tuesday

8 Drought Change 1 Week 4 Weeks

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

10 State Coverage and Intensity (Spatial Scale)
10/2/2012 (Index:256) 6/3/2008 (Index: 264)

11 State Coverage and Intensity (Spatial Scale)
8/8/2006 (Index:329) 07/13/2017 (Index: 257)

12 7-day Forecast Mon 7am, July 17 through Thu 7am, July 24

13 Longer-term Forecast 8-14 Day Precipitation August through October


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