Whacking Fatties Fly Fishing Reports and Forecasts

South Dakota Fishing Report

Best Fishing Stream Name Today 7/24 7/25
1 Lewis and Clark Lake, SD 5 5 4
2 Brant Lake, SD 5 5 4
3 Buffalo Slough, SD 5 5 4
4 East Vermillion Lake, SD 5 5 4
5 Long Lake, SD 5 5 4
6 Anderson Slough, SD 5 5 4
7 Silver Lake, SD 5 5 4
8 Lost Lake, SD 5 5 4
9 Lake Madison, SD 5 5 4
10 Beaver Lake, SD 5 5 4
11 Clear Lake: Minnehaha, SD 5 5 4
12 Lake Menno, SD 5 5 4
13 Diamond Lake, SD 5 5 4
14 Island Lake, SD 5 5 4
15 Swan Lake, SD 5 5 3
16 Wall Lake, SD 5 5 3
17 Marindahl Lake, SD 5 5 3
18 Beaver Lake: Yankton, SD 5 5 3
19 Lake Yankton, SD 5 5 3
20 Lake Alvin, SD 5 5 3
21 Lost Lake: Minnehaha, SD 5 5 3
22 Lake Oakwood, SD 5 4 4
23 Lake Cochrane, SD 5 4 4
24 Lake Goldsmith, SD 5 4 4
25 Lake Sinai, SD 5 4 4
26 Clear Lake, SD 5 4 4
27 Lake Poinsett, SD 5 4 4
28 Oak Lake, SD 5 4 4
29 Lake Tetonkaha, SD 5 4 4
30 Lake Hendricks, SD 5 4 4
31 Fish Lake, SD 5 4 4
32 Lake Oliver, SD 5 4 4
33 Lake Thompson, SD 5 4 4
34 Clear Lake: Hamlin, SD 5 4 4
35 Lake Norden, SD 5 4 4
36 Lake Dimock, SD 5 4 4
37 Spirit Lake, SD 5 4 4
38 Ethan Lake, SD 5 4 4
39 Goose Lake, SD 5 4 4
40 Lake Whitewood, SD 5 4 4
41 Tuschen Slough, SD 5 4 4
42 Lake Mitchell, SD 5 4 4
43 Lake Albert, SD 5 4 4
44 Lake Henry, SD 5 4 4
45 Lake Carthage, SD 5 4 4
46 Hanson Lake, SD 5 4 4
47 Lake Herman, SD 5 4 4
48 South Coteau Lake, SD 5 3 4
49 Lake Alice, SD 5 3 4
50 Ketchum Lake, SD 5 3 4
51 Dog Ear Lake, SD 5 3 4
52 Roosevelt Lake, SD 5 3 4
53 Lake Boehm, SD 5 3 4
54 Lake Platte, SD 5 3 4
55 Swan Lake: Clark, SD 5 3 4
56 Waubay Lake, SD 5 3 4
57 Mud Lake, SD 5 3 4
58 Bullhead Lake: Deuel, SD 5 3 4
59 Lake Louise, SD 5 3 4
60 Horseshoe Lake, SD 5 3 4
61 Grass Lake, SD 5 3 4
62 Stafford Dam, SD 5 3 4
63 Cottonwood Lake: Spink, SD 5 3 4
64 Richmond Lake, SD 5 3 4
65 Goose Lake: Day, SD 5 3 4
66 Lake Byron, SD 5 3 4
67 Pickerel Lake, SD 5 3 4
68 Round Lake: Clark, SD 5 3 4
69 Twin Lakes, SD 5 3 4
70 Corsica Lake, SD 5 3 4
71 Jones Lake, SD 5 3 4
72 Ravine Park Lake, SD 5 3 4
73 Lake Parmley, SD 5 3 4
74 Rose Hill Lake, SD 5 3 4
75 Lake Cresbard, SD 5 3 4
76 Lake Kampeska, SD 5 3 4
77 Lake Faulkton, SD 5 3 4
78 North Scatterwood Lake, SD 5 3 4
79 Pigors Lake, SD 5 3 4
80 Baileys Lake, SD 5 3 4
81 Staum Dam, SD 5 3 4
82 Cottonwood Lake: Sully, SD 5 3 4
83 Lake Redfield, SD 5 3 4
84 Dry Lake Number Two, SD 5 3 4
85 Lake Dudley, SD 5 3 4
86 Twin Lakes: Sanborn, SD 5 3 4
87 Pelican Lake, SD 5 3 4
88 Wilmarth Lake, SD 5 3 4
89 Fordham Dam, SD 5 3 4
90 Reid Lake, SD 5 3 4
91 Lake Geddes, SD 5 3 4
92 Clear Lake: Marshall, SD 5 3 4
93 Abraham Lake, SD 5 3 4
94 Hickman Lake, SD 5 3 4
95 Summit Lake, SD 5 3 4
96 Willow Creek Lake, SD 5 3 4
97 Blue Dog Lake, SD 5 3 4
98 Sixmile Lake, SD 5 3 4
99 Piyas Lake, SD 5 3 4
100 Punished Womans Lake, SD 5 3 4
101 South Red Iron Lake, SD 5 3 4
102 Opitz Lake, SD 5 3 4
103 Minnewasta Lake, SD 5 3 4
104 Bullhead Lake, SD 5 3 4
105 Cottonwood Lake, SD 5 3 4
106 Pierpont Lake, SD 5 3 4
107 Amsden Lake, SD 5 3 4
108 Roy Lake, SD 5 3 4
109 Round Lake: Deuel, SD 5 3 4
110 Enemy Swim Lake, SD 5 3 4
111 Antelope Lake, SD 5 3 4
112 School Lake, SD 5 3 4
113 Round Lake, SD 5 3 4
114 Elm Lake, SD 5 3 4
115 Buffalo Lakes, SD 5 3 4
116 Ninemile Lake, SD 5 3 4
117 White Lake, SD 5 3 4
118 Fourmile Lake, SD 5 3 4
119 Shadehill Reservoir, SD 5 3 4
120 Owen Lake, SD 5 3 4
121 Lemmon Lake, SD 5 3 4
122 Lake Francis Case, SD 5 3 3
123 Brakke Dam, SD 5 3 3
124 Fairfax Lake, SD 5 3 3
125 McCook Lake, SD 4 5 3
126 Center Lake, SD 4 4 5
127 Stockade Lake, SD 4 4 5
128 Bismark Lake, SD 4 4 5
129 Pactola Reservoir, SD 4 4 5
130 Angostura Reservoir, SD 4 4 4
131 Cold Brook Reservoir, SD 4 4 4
132 Bear Butte Lake, SD 4 4 4
133 Sheridan Lake, SD 4 4 4
134 Belle Fourche Reservoir, SD 4 4 4
135 Lake Oahe: Dewey, SD 4 3 4
136 Molstad Lake, SD 4 3 4
137 Lake Hurley, SD 4 3 4
138 Lake Campbell, SD 4 3 4
139 Isabel Lake, SD 4 3 4
140 Eureka Lake, SD 4 3 4
141 Lake Gardner, SD 4 3 4
142 Lake Pocasse, SD 4 3 4
143 Morristown East Lake, SD 4 3 4
144 Waggoner Lake, SD 4 3 3
145 Curlew Lake, SD 4 3 3
146 Hayes Lake, SD 4 3 3
147 Deerfield Lake, SD 3 4 5
148 Iron Creek Lake, SD 3 4 4
149 Lake Sharpe, SD 3 3 4
150 Dupree Lake, SD 3 3 4
151 Opal Lake, SD 3 3 4
152 Lantry Lake, SD 3 3 4
153 Trail City Railroad Lake, SD 3 3 4
154 Little Moreau Lake, SD 3 3 4
155 Fate Dam, SD 3 3 3
156 Byre Lake, SD 3 3 3
157 Reliance Lake, SD 3 3 3
158 Eagle Butte Lake, SD 3 3 3
159 Lake Oahe, SD 3 2 4
160 Sand Creek, SD 3 2 2
161 Little Spearfish Creek, SD 2 3 3
162 Castle Creek, SD 2 2 4
163 Spearfish Creek, SD 2 2 3
164 Whitewood Creek, SD 2 2 3
165 Crow Creek, SD 2 2 3
166 Rapid Creek, SD 2 2 2
167 Grace Coolidge Creek, SD 2 2 2
168 Boxelder Creek, SD 2 2 2
169 Spring Creek, SD 2 2 2
170 French Creek, SD 2 2 2
171 Battle Creek, SD 2 2 2




What is Whacking Fatties? Fly fishing reports and forecasts for ~10,000 streams and lakes and rivers across North America and the United Kingdom.

What is the goal?

To better understand fly-fishing patterns, conditions to predict ferocity of fishable events and locations.

How do we do it?

Fly Fishing Reports and Forecasts. Throughout every day, we create 7 day fishing forecasts for ~10,000 streams and lakes.

What is the Fatty Factor?

A 5 star rating calculated per hour over every day per stream. We create a detailed forecast for each stream whereby every hour gets a 5 star Fatty Factor rating.

How is the Fatty Factor calculated?

The Fatty Factor is calculated using a fly-fishing success estimation model containing proprietary big data analytics. We consume data from near and real-time sources, satellites, and sensors; compile/compare, against historic datasets, to create the Fatty Factor. Location, season, and analytics improve the rating over time.

How is the Fatty Factor rated?

5 starts is the best while 0 starts is “Not Fatty”.

How to use Whacking Fatties Fishing Reports and Forecasts?

Consult the detailed stream information section of the fly-fishing reports and forecasts for the latest weather temperatures, wind speeds, cloud cover, gauge flows, and insect hatch patterns.

What do trout eat?

Check out the hatch recommendations for each stream in the detailed stream area. Investigate the hatch recommendations if you are interested in what do trout eat.

What kind of fish can I catch?

You tell us? Rainbow trout, brook trout, lake trout, bass, carp, etc. Currently, fresh water species. Salt water fly fishing? Fly fishing for carp is awesome. Tell us what you are after? Steelhead, grayling, tarpon, bass, bonefish, taimen, permit, salmon fishing?

How do I use the fishing maps?

We have a vast amount of geographic data for each stream. Click on the points to get more information. Green points represent fishing access such as put-ins and take-outs. Purple points represent bridges or stream crossings whereby often Google StreetView is available. Red points represent USGS Stream Gauges. Where available, we have graphs for Predictive Hydrograph 7 days, Water Temperature, Observed Height (ft.) 7 days, Observed Discharge (cfs) 7 days, and Duration Hydrograph. The Duration Hydrograph is a graphical presentation of recent daily streamflow, plotted over the long-term statistics of streamflow for each day of the year.

Can I determine land ownership from the stream map?

Yes. Landownership data is included in the map. In the map legend, the type of ownership is shown while you hover or tap on the map. You will see public or private land. For public, it will tell you the agency such as Forest Service or State Park.

Does Whacking Fatties have private landowner information such as parcel boundaries?

Currently, we have landowner information for Montana only. If you drill down into the map, you will see parcel boundaries. Simply click on the parcel to see who owns the land and other related information.

How do I determine distance from one access to another?

In the map, the measure tool can be used to trace along a stream to measure between fishing access points.

Can I determine stream elevation?

In the fishing map, you can turn on the elevation profile for a stream. You are able to visually see how much elevation is dropped along a stream.

What other mapping data is available and useful to anglers?

We provide three different background maps: dark, light, and satellite. The light is useful for planning routes to fishing access points. The satellite is very useful for all sorts of detailed planning.

What gauges are included in the Stream Flow graph?

For each stream, we have included all gauges for the stream overlaid into one graph. This is great for analyzing flow data of the stream as a whole to help predict best fishing areas.

What is the Fatty Store?

Check out the Fatty Store for great deals on the best fly fishing gear available in the market. We make available only the highest quality fly fishing gear at deep discounted prices such as fly fishing rods, fly boxes, waders or wading boots, fly fishing reels, flies, and tackle. From time to time, we have promotions on fly fishing vacations, film tours, and fly fishing videos. Look for deals on fly fishing schools.

What about fly fishing forums?

We have a great fly fishing forum where anglers can post their own reports and pictures. At each detailed stream page, you can upload fish pictures and your own fishing reports. We encourage you to rate the stream. We are working on the capability to upload your own fishing videos.

Where do I find a professional recommended fishing guide, lodge, or fishing charter?

Whacking Fatties Pro Contributors are professionally vetted and approved. Pro Contributors provide the highest quality guided fishing experiences. Look for recommended fishing charters, lodges, fly fishing and tackle shops posted on detailed stream report pages. Fishing near me? Investigate Pro Contributors listed on specific detailed streams near you.

What is Fatty Information?

What is the best fly line? How to tie a fly? Fly lines explained? Fly fishing beginner? Fatty Information is a new section whereby we present practical fly fisherman knowledge such as fly fishing knots, fly patterns, tapered leader formulas, tippet rings, strike indicators, drift boats, nymph fishing, euro nymphing, knots for fly fishing, best fishing sunglasses, etc. Information on our favorite flies such as mop files, clouser, nymph fly, wet flies, muddler minnow, isonychia fly, mole fly, cdc and elk fly, trico fly, caddis fly, and flies for largemouth bass. As well as recommendations for best small stream fly rods. The tug is the drug!

What are Fatty Alerts?

Never miss a great day of fishing! Fatty Alerts are automated email notifications whereby you are sent an email ONLY when your favorite streams have a great forecast. First, you sign up for a Whacking Fatties account; then, choose your favorite streams to get alerts. Fatty Alerts include our long range forecast. Never miss great fishing weather or fishing forecast with Fatty Alerts. They are free!

What are we working on next?

We will be expanding to fresh water lakes for bass, carp, and other great fishing. We will be able to assist with planning the best dates and times for your next fly fishing for stripers adventure. Forecasting for salt-water locations are on the radar. Please contact us with your feedback. Tight lines!

With the goal of better understanding fly-fishing patterns and predicting location and ferocity of fishable events, Whacking Fatties presents the Fatty Factor: a fly-fishing success estimation model using proprietary big data analytics.

Whacking Fatties promotes responsible fishing via catch and release practice and water resources conservation.

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