Lake Francis Case

Brule County, SD

MAYBEConfidence · Medium
Best bite window
Thu · Jul 23, 11 PM → 3 AM (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. 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 Thu, Jul 23 from 11 PM to 3 AM (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 southeast, gusting to 16 mph, surface pressure near 956 hPa on a rising trend, and rainfall totaling 0.00 inches over the four hours. Air temperature in the window sits near 66 °F, with a dominant forecast of overcast. Confidence in this read is medium; it was generated July 23, 2026, 10:38 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 July 23, 2026, 10:38 AM UTCBUCKET 2026-07-23ENGINE 0.7.0

Conditions at a glance

Wind
7mph

SE · gust 16

Rain / Weather
0in

Overcast

Temp
66°F

19°C · hum 94%

Pressure
28.23inHg

Rising

7-Day Fishing Forecast

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

  1. Thu · Jul 23
    Now → 2 PM
    MAYBE
    A front passing through
    75° / 63°F
    13 mph · Sgust 26
    0.07 in
    ↓ -4.3 hPa
  2. Fri · Jul 24
    4 AM → 8 AM
    MAYBE
    A front passing through
    90° / 64°F
    7 mph · Sgust 18
    0.00 in
    ↓ -7.3 hPa
  3. Sat · Jul 25
    5 AM → 9 AM
    MAYBE
    A front passing through
    113° / 75°F
    5 mph · Wgust 37
    0.18 in
    → 0.0 hPa
  4. Sun · Jul 26
    10 AM → 2 PM
    MAYBE
    A front passing through
    117° / 75°F
    11 mph · SWgust 35
    0.00 in
    ↓ -8.3 hPa
  5. Mon · Jul 27
    5 AM → 9 AM
    MAYBE
    A front passing through
    109° / 77°F
    7 mph · NWgust 27
    0.00 in
    ↑ +4.5 hPa
  6. Tue · Jul 28
    7 AM → 11 AM
    MAYBE
    A front passing through
    100° / 81°F
    7 mph · Egust 22
    0.01 in
    → +3.6 hPa
  7. Wed · Jul 29
    5 PM → 9 PM
    MAYBE
    A front passing through
    109° / 70°F
    7 mph · Ngust 26
    0.05 in
    ↓ -2.8 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+12.7 hPa over 72h
Rain
Light rain
0.07 in totallast 72h
Wind
Gusty
7 mph · gust 25 · N
Temperature
Cooler
-16.0°F over 72h91–63°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.