Big Sioux River near Castlewood
0.8 mi- Level
- 4.9 ft
- Flow
- 39 cfs
Reading from Sat 6:45 AM · NWS gauge page
Appearance
Observed 7:50 AM CDT at KATY
Rainy and 57°14°, 9°5° warmer than a typical Oct 24, rain ~9–10 AM (48%).
Today: low 38°3° (likely 38°3° to 46°8°), high 61°16° (likely 61°16° to 66°19°).
Now 57°14°
Rain
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 8a | Mostly sunny | 57°14° (likely 57°14° to 59°15°) | 59°15° | 50%, 0.01 in0.3 mm | 10 mph16 km/h from WSW, gusts 18 mph28 km/h | 75% | 55% | 0 |
| Sat 9a | Rain | 56°13° (likely 56°13° to 58°14°) | 58°14° | 50%, 0.01 in0.3 mm | 13 mph21 km/h from NW, gusts 29 mph46 km/h | 72% | 67% | 0 |
| Sat 10a | Rain | 55°13° (likely 52°11° to 56°13°) | 57°14° | 50%, 0.01 in0.3 mm | 15 mph24 km/h from NW, gusts 26 mph42 km/h | 69% | 93% | 1 |
| Sat 11a | Rain | 56°13° (likely 49°9° to 56°13°) | 57°14° | 40%, 0.01 in0.3 mm | 16 mph26 km/h from NW, gusts 28 mph45 km/h | 65% | 95% | 1 |
| Sat 12p | Drizzle | 57°14° (likely 48°9° to 57°14°) | 57°14° | 30%, 0.01 in0.3 mm | 17 mph27 km/h from NW, gusts 26 mph41 km/h | 59% | 98% | 2 |
| Sat 1p | Cloudy | 56°13° (likely 48°9° to 56°13°) | 56°13° | 30%, 0.02 in0.5 mm | 16 mph26 km/h from NW, gusts 21 mph34 km/h | 57% | 100% | 3 |
| Sat 2p | Cloudy | 59°15° (likely 48°9° to 59°15°) | 59°15° | 20%, 0.02 in0.5 mm | 15 mph24 km/h from NW, gusts 20 mph32 km/h | 49% | 99% | 3 |
| Sat 3p | Cloudy | 56°13° (likely 49°9° to 56°13°) | 56°13° | 20%, 0.02 in0.5 mm | 14 mph23 km/h from NNW, gusts 17 mph28 km/h | 53% | 97% | 2 |
| Sat 4p | Cloudy | 56°13° (likely 50°10° to 56°13°) | 56°13° | 20%, 0.02 in0.5 mm | 12 mph19 km/h from NNW, gusts 16 mph25 km/h | 51% | 80% | 1 |
| Sat 5p | Cloudy | 55°13° (likely 50°10° to 55°13°) | 55°13° | 10%, 0.02 in0.5 mm | 10 mph16 km/h from NNW, gusts 15 mph25 km/h | 51% | 90% | 1 |
| Sat 6p | Cloudy | 53°12° (likely 49°9° to 53°12°) | 53°12° | 5%, 0.02 in0.5 mm | 8 mph13 km/h from NNW, gusts 14 mph23 km/h | 52% | 90% | 0 |
| Sat 7p | Cloudy | 51°11° (likely 47°8° to 51°11°) | 51°11° | 0% | 6 mph10 km/h from NNW, gusts 11 mph18 km/h | 54% | 82% | 0 |
| Sat 8p | Cloudy | 49°9° (likely 46°8° to 50°10°) | 47°8° | 0% | 5 mph8 km/h from NNW, gusts 10 mph16 km/h | 56% | 90% | 0 |
| Sat 9p | Cloudy | 48°9° (likely 45°7° to 48°9°) | 47°8° | 0% | 3 mph5 km/h from NNW, gusts 8 mph12 km/h | 56% | 79% | 0 |
| Sat 10p | Cloudy | 47°8° (likely 44°7° to 47°8°) | 46°8° | 0% | 3 mph5 km/h from N, gusts 7 mph11 km/h | 56% | 78% | 0 |
| Sat 11p | Cloudy | 45°7° (likely 44°7° to 46°8°) | 44°7° | 0% | 3 mph5 km/h from N, gusts 7 mph11 km/h | 58% | 80% | 0 |
| Sun 12a | Cloudy | 45°7° (likely 42°6° to 46°8°) | 44°7° | 0% | 3 mph5 km/h from N, gusts 8 mph12 km/h | 58% | 81% | 0 |
| Sun 1a | Clear | 44°7° (likely 39°4° to 45°7°) | 41°5° | 0%, 0.02 in0.5 mm | 5 mph8 km/h from N, gusts 9 mph15 km/h | 58% | 42% | 0 |
| Sun 2a | Clear | 43°6° (likely 38°3° to 44°7°) | 40°4° | 5%, 0.02 in0.5 mm | 5 mph8 km/h from NNE, gusts 8 mph13 km/h | 57% | 44% | 0 |
| Sun 3a | Cloudy | 42°6° (likely 37°3° to 44°7°) | 39°4° | 10%, 0.02 in0.5 mm | 5 mph8 km/h from NNE, gusts 8 mph13 km/h | 57% | 90% | 0 |
| Sun 4a | Cloudy | 42°6° (likely 36°2° to 44°7°) | 39°4° | 10%, 0.02 in0.5 mm | 5 mph8 km/h from NNE, gusts 9 mph15 km/h | 55% | 79% | 0 |
| Sun 5a | Cloudy | 41°5° (likely 36°2° to 45°7°) | 38°3° | 20%, 0.02 in0.5 mm | 5 mph8 km/h from NNE, gusts 11 mph17 km/h | 57% | 99% | 0 |
| Sun 6a | Cloudy | 40°4° (likely 36°2° to 45°7°) | 37°3° | 20%, 0.02 in0.5 mm | 5 mph8 km/h from NNE, gusts 9 mph14 km/h | 59% | 99% | 0 |
| Sun 7a | Cloudy | 40°4° (likely 35°2° to 45°7°) | 36°2° | 20%, 0.03 in0.8 mm | 6 mph10 km/h from NE, gusts 10 mph16 km/h | 59% | 98% | 0 |
| Sun 8a | Cloudy | 39°4° (likely 35°2° to 45°7°) | 35°2° | 20%, 0.03 in0.8 mm | 6 mph10 km/h from NE, gusts 13 mph22 km/h | 64% | 99% | 0 |
| Sun 9a | Cloudy | 41°5° (likely 38°3° to 46°8°) | 37°3° | 50%, 0.03 in0.8 mm | 6 mph10 km/h from ENE, gusts 12 mph19 km/h | 62% | 98% | 0 |
| Sun 10a | Cloudy | 45°7° (likely 41°5° to 46°8°) | 41°5° | 50%, 0.03 in0.8 mm | 7 mph11 km/h from ENE, gusts 14 mph22 km/h | 60% | 100% | 0 |
| Sun 11a | Rain | 46°8° (likely 43°6° to 47°8°) | 42°6° | 60%, 0.03 in0.8 mm | 8 mph13 km/h from ENE, gusts 16 mph25 km/h | 58% | 100% | 1 |
| Sun 12p | Rain | 46°8° (likely 43°6° to 47°8°) | 41°5° | 50%, 0.03 in0.8 mm | 9 mph14 km/h from ENE, gusts 15 mph24 km/h | 58% | 100% | 0 |
| Sun 1p | Rain | 46°8° (likely 43°6° to 47°8°) | 41°5° | 50%, 0.05 in1.3 mm | 9 mph14 km/h from ENE, gusts 15 mph24 km/h | 58% | 100% | 1 |
| Sun 2p | Rain | 47°8° (likely 43°6° to 47°8°) | 43°6° | 50%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 14 mph22 km/h | 56% | 100% | 0 |
| Sun 3p | Rain | 47°8° (likely 43°6° to 47°8°) | 43°6° | 60%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 15 mph24 km/h | 56% | 100% | 0 |
| Sun 4p | Drizzle | 48°9° (likely 42°6° to 48°9°) | 43°6° | 60%, 0.05 in1.3 mm | 10 mph16 km/h from NE, gusts 15 mph24 km/h | 54% | 100% | 0 |
| Sun 5p | Drizzle | 46°8° (likely 41°5° to 46°8°) | 41°5° | 50%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 18 mph29 km/h | 60% | 100% | 0 |
| Sun 6p | Rain | 46°8° (likely 40°4° to 46°8°) | 41°5° | 50%, 0.05 in1.3 mm | 10 mph16 km/h from NE, gusts 21 mph33 km/h | 63% | 100% | 0 |
| Sun 7p | Rain | 45°7° (likely 39°4° to 45°7°) | 40°4° | 80%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 20 mph33 km/h | 65% | 100% | 0 |
| Sun 8p | Rain | 43°6° (likely 39°4° to 43°6°) | 38°3° | 80%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 19 mph31 km/h | 67% | 100% | 0 |
| Sun 9p | Rain | 42°6° (likely 39°4° to 42°6°) | 36°2° | 80%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 19 mph31 km/h | 70% | 100% | 0 |
| Sun 10p | Rain | 42°6° (likely 39°4° to 42°6°) | 36°2° | 80%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 19 mph31 km/h | 70% | 100% | 0 |
| Sun 11p | Rain | 42°6° (likely 39°4° to 42°6°) | 36°2° | 80%, 0.05 in1.3 mm | 9 mph14 km/h from NE, gusts 21 mph34 km/h | 73% | 100% | 0 |
| Mon 12a | Rain | 41°5° (likely 40°4° to 41°5°) | 35°2° | 80%, 0.05 in1.3 mm | 10 mph16 km/h from NE, gusts 21 mph34 km/h | 76% | 100% | 0 |
| Mon 1a | Rain | 41°5° (likely 40°4° to 42°6°) | 35°2° | 80%, 0.09 in2.3 mm | 10 mph16 km/h from NE, gusts 22 mph35 km/h | 79% | 100% | 0 |
| Mon 2a | Rain | 40°4° (likely 40°4° to 42°6°) | 33°1° | 80%, 0.09 in2.3 mm | 12 mph19 km/h from NE, gusts 23 mph37 km/h | 82% | 99% | 0 |
| Mon 3a | Rain | 39°4° (likely 39°4° to 42°6°) | 32°0° | 80%, 0.09 in2.3 mm | 12 mph19 km/h from ENE, gusts 23 mph37 km/h | 82% | 99% | 0 |
| Mon 4a | Rain | 38°3° (likely 38°3° to 42°6°) | 30°−1° | 80%, 0.09 in2.3 mm | 13 mph21 km/h from ENE, gusts 24 mph38 km/h | 85% | 100% | 0 |
| Mon 5a | Rain | 37°3° (likely 37°3° to 42°6°) | 29°−2° | 80%, 0.09 in2.3 mm | 13 mph21 km/h from ENE, gusts 24 mph39 km/h | 89% | 100% | 0 |
| Mon 6a | Rain | 36°2° (likely 36°2° to 41°5°) | 27°−3° | 80%, 0.09 in2.3 mm | 14 mph23 km/h from ENE, gusts 26 mph42 km/h | 92% | 100% | 0 |
| Mon 7a | Rain | 35°2° (likely 35°2° to 41°5°) | 26°−3° | 90%, 0.22 in5.6 mm | 14 mph23 km/h from ENE, gusts 26 mph42 km/h | 96% | 100% | 0 |
Morning
6 AM–noon
50% chance · 0.04 in1 mm
Afternoon
noon–6 PM
30% chance · 0.11 in2.8 mm
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Today: A chance of rain before 5pm. Mostly cloudy. High near 61, with temperatures falling to around 55 in the afternoon. Northwest wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tonight: A slight chance of rain after 5am. Mostly cloudy. Low around 38, with temperatures rising to around 41 overnight. North wind 3 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
60% chance · 0.17 in4.3 mm
Afternoon
noon–6 PM
60% chance · 0.28 in7.1 mm
Evening
6 PM–midnight
80% chance · 0.3 in7.6 mm
Overnight
midnight–6 AM
80% chance · 0.5 in13 mm
Official NWS forecast
Day: Rain likely. Cloudy, with a high near 48. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Night: Rain. Cloudy, with a low around 34. Northeast wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
90% chance · 0.56 in14 mm
Afternoon
noon–6 PM
90% chance · 0.42 in11 mm
Evening
6 PM–midnight
100% chance · 0.3 in7.5 mm
Overnight
midnight–6 AM
90% chance · 0.12 in3.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain. Cloudy, with a high near 45. East northeast wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Night: Rain. Cloudy, with a low around 34. East wind 12 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
40% chance
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
30% chance · 0.06 in1.4 mm
Overnight
midnight–6 AM
30% chance · 0.01 in0.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely before 1pm. Mostly cloudy, with a high near 53. South southwest wind around 10 mph. Chance of precipitation is 70%.
Night: A chance of rain after 7pm. Mostly cloudy, with a low around 41. South wind 6 to 9 mph. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain before 1pm. Partly sunny, with a high near 58. Southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Night: Mostly clear, with a low around 36.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Partly cloudy, with a low around 40.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
30% chance · 0.12 in2.9 mm
Overnight
midnight–6 AM
30% chance · 0.12 in3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 7am. Partly sunny, with a high near 58. Chance of precipitation is 20%.
Night: A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
40% chance · 0.04 in0.9 mm
Afternoon
noon–6 PM
40% chance · 0.04 in1 mm
Evening
6 PM–midnight
40% chance · 0.03 in0.8 mm
Overnight
midnight–6 AM
30% chance · 0.03 in0.8 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
20% chance · 0.05 in1.4 mm
Evening
6 PM–midnight
20% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
52% chance of rain, high 61°, low 38°.
62% chance of rain, high 48°, low 34°, cooling off.
90% chance of rain, high 45°, low 34°, cooling off.
Highs 53–61°; chance of precipitation on Tuesday, Wednesday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (ABR) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Reading from Sat 6:45 AM · NWS gauge page
Reading from Sat 6:45 AM · NWS gauge page
Reading from Sat 6 AM · NWS gauge page
Reading from Sat 6 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 78% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at. About 6 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 52°F).
No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.
Today’s expected high is 9°5° warmer than typical.
On average 13°7° warmer than normal (daily mean temperature).
Castlewood weather by month: normals, records, snow and freeze dates
Sunrise 7:55 AM, sunset 6:28 PM.
Clouds most of the night (about 81% cover).
Waxing gibbous
97% lit · growing