1South Dakota Department of Public Safety

2014 Spring Flood

Outlook

2South Dakota Department of Public Safety

Plains Snow Water Equivalent Comparison2014 SWE

3South Dakota Department of Public Safety

Plains Snow Water Equivalent Comparison2011 SWE

4South Dakota Department of Public Safety

Mountain Snow Water Equivalent Comparison2014 SWE

5South Dakota Department of Public Safety

Mountain Snow Water Equivalent Comparison2011 SWE

6South Dakota Department of Public Safety

Drought Comparison2014

7South Dakota Department of Public Safety

Drought Comparison2013

8South Dakota Department of Public Safety

Temperature and PrecipitationOutlook

• 30, 60, 90-day outlook

• Above – normal chances for cooler temperatures• Equal chances of normal, above-normal, or below-normal precipitation

9South Dakota Department of Public Safety

Probability of major flooding onSouth Dakota rivers

10South Dakota Department of Public Safety

Flooding Factor – mountain SWE

11South Dakota Department of Public Safety

Flooding Factor – soil moisture/frost

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Fort Peck Garrison Oahe Reservoir System0

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End Feb 2011Current (3-5-14)Storage

South Dakota Department of Public Safety

Flooding Factor – reservoir storage

Storage End Feb 2011 Current (3-5-14) Storage

Fort Peck 15.2 12.5 18.7

Garrison 18.4 16 23.8

Oahe 18.9 17.2 23.1

Reservoir System 57.6 50.6 72.4

13South Dakota Department of Public Safety

Flood Fight Preparations

• Conducted a risk assessment on SD rivers.• Staged flood resources across the state.• Participated in USACE and NWS briefings• Engaged DENR as a gut check for USACE• Communicating with Missouri River

communities• Reviewing community infrastructure and

concerns spreadsheets• Reviewed current sandbag contract