Lake Francis Case

Brule County, SD

MAYBEConfidence · Medium
Best bite window
Mon · Oct 26, 7 PM → 11 PM (America/Chicago)
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Lake Francis Case — light winds and rising pressure after a passing system for this window. Watch a front passing through and pressure swinging. Weather-only read (no on-water history calibrating this yet).

Full read

The current fishing-weather read for Lake Francis Case in Brule County, SD is MAYBE, with the best four-hour window on Mon, Oct 26 from 7 PM to 11 PM (America/Chicago). The main factor in its favor is dry conditions across the window, and the main watch-out is a front passing through. During that window the forecast calls for wind near 7 mph out of the northeast, gusting to 12 mph, surface pressure near 963 hPa on an unstable trend, and rainfall totaling 0.00 inches over the four hours. Air temperature in the window sits near 41 °F, with a dominant forecast of overcast. Confidence in this read is medium; it was generated October 26, 2026, 8:52 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather alone; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED October 26, 2026, 8:52 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
7mph

NE · gust 12

Rain / Weather
0in

Overcast

Temp
41°F

5°C · hum 95%

Pressure
28.44inHg

Unstable

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Mon · Oct 26
    7 PM → 11 PM
    MAYBE
    A front passing through
    41° / 39°F
    7 mph · NEgust 22
    0.48 in
    ↓ -7.5 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    MAYBE
    A front passing through
    54° / 39°F
    4 mph · NWgust 25
    0.00 in
    ↓ -9.6 hPa
  3. Wed · Oct 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    63° / 48°F
    7 mph · Sgust 21
    0.02 in
    ↑ +4.3 hPa
  4. Thu · Oct 29
    7 AM → 11 AM
    MAYBE
    A front passing through
    64° / 45°F
    3 mph · SEgust 16
    0.00 in
    ↑ +3.6 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 46°F
    7 mph · Egust 25
    0.01 in
    ↓ -1.7 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 52°F
    6 mph · SEgust 22
    0.00 in
    ↓ -5.3 hPa
  7. Sun · Nov 1
    6 PM → 10 PM
    MAYBE
    A front passing through
    68° / 52°F
    7 mph · Sgust 21
    0.02 in
    ↓ -2.3 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+18.3 hPa over 72h
Rain
Light rain
0.12 in totallast 72h
Wind
Gusty
12 mph · gust 38 · E
Temperature
Cooler
-25.0°F over 72h81–39°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

About Lake Francis Case

Surface area
102,000 acres
Max depth
140 ft
Elevation
1,355 ft
Managing agency
U.S. Army Corps of Engineers (Omaha District)
Dam
Fort Randall Dam (Missouri River)

Primary species: Walleye, Sauger, White bass, Smallmouth bass, Largemouth bass, Channel catfish, Black crappie, Northern pike, Yellow perch, Bluegill, Freshwater drum, Paddlefish, Bullhead catfish.

Notable structure: White River delta (splits reservoir into an 'upper lake' and 'lower lake'), Chamberlain 'dredge-hole' deep-water area, fine alluvial sediment and sand bottom, short bays with few large protected coves.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.