Residents across western South Dakota are preparing for a volatile meteorological stretch as a series of competing pressure systems move through the region. Following a period of high winds, a significant warm-up is forecast, with upper 60s expected in Black Hills Tuesday as a high-pressure ridge builds over the area.
The transition will not be linear. The region is currently navigating a complex atmospheric shift characterized by a departing low-pressure system to the east and an incoming high-pressure system that has already cleared skies across a vast swath of the Western United States, stretching from the Pacific coast through Denver.
This instability was evident recently, with wind gusts exceeding 30 mph recorded as the pressure systems collided. Although the immediate outlook suggests a return to clearer skies, the temperature swings over the next several days will be stark, moving from near-freezing mornings to spring-like afternoons in a matter of hours.
The Immediate Outlook: Sunday and Monday
The weekend begins with a sharp contrast in temperatures. Sunday morning is expected to be chilly, with lows dipping into the upper 20s to lower 30s. When accounting for wind chills, the perceived temperature will likely drop another 5 degrees, necessitating winter attire for early commuters.
Though, westerly winds will push warmer air into the region by Sunday afternoon. Rapid City is forecast to reach 57 degrees, while areas further east and north—including Sheridan, Gillette, Newcastle, Pine Ridge, Philip, and Kadoka—could see highs reaching the lower to mid-60s.
The stability is short-lived. By Monday afternoon and evening, a low-pressure system—often referred to as a “clipper” due to its fast movement and Canadian origin—is expected to track across the region. This system could bring light snow to the areas spanning the Black Hills and the Interstate 90 corridor.
Meteorologists suggest that any snow accumulation will likely be minimal. This is due to the relatively warm air mass currently residing in the region, which prevents the heavy, sustained freezing temperatures required for significant snowfall. Temperatures on Monday are expected to settle around 43 degrees during the passage of the clipper system.
Tuesday’s Temperature Surge
The most notable shift occurs Tuesday, as a meteorological ridge—an elongated area of high pressure—builds into the region. This ridge acts as a barrier to cold air, allowing warmer air from the south to surge northward.
For those in lower elevation areas, the result will be a dramatic jump in temperature. Rapid City is expected to hit a high of 69 degrees, while Hot Springs and Pine Ridge are both forecast to reach 68 degrees. Even higher-elevation towns will see a significant lift, with Spearfish reaching 66 degrees and Deadwood and Custer hovering in the lower 60s.
To provide a clearer picture of the expected warmth, the following table outlines the projected Tuesday highs for key locations in the region:
| Location | Forecasted High |
|---|---|
| Rapid City | 69°F |
| Hot Springs | 68°F |
| Pine Ridge | 68°F |
| Spearfish | 66°F |
| Deadwood | Lower 60s |
| Custer | Lower 60s |
Mid-Week Volatility and Long-Term Trends
The warmth of Tuesday will be tempered by a cold front moving through Wednesday night into Thursday. This front is expected to bring a chance of showers to the region. Current projections indicate that the associated low-pressure system is moving faster and tracking further north than previously anticipated.
Because of this shift in trajectory, the most significant weather impacts are expected to remain north of Interstate 90, potentially concentrating the heaviest precipitation in North Dakota. While the Black Hills will feel the influence of the front, the most disruptive weather is likely to bypass the immediate area.
Following the cold front, the warming trend is expected to resume. Temperatures are forecast to climb again on Thursday and Friday, setting the stage for another mild weekend. Early projections suggest that temperatures in the 50s and 60s will return by next Saturday and Sunday.
Understanding the “Clipper” and the “Ridge”
For those unfamiliar with the terminology, the weather in the Black Hills is often dictated by these two phenomena. A “clipper” is a fast-moving low-pressure system that “clips” the edge of the polar jet stream. These systems typically bring quick bursts of precipitation and a brief drop in temperature but rarely linger long enough to cause major accumulations if the surrounding air is already warming.
Conversely, a “ridge” is a peak in the jet stream that pushes cold Arctic air away from a region and pulls warmer, subtropical air inward. When a ridge builds over the Great Plains, it often results in the sudden, dramatic temperature spikes seen in the Tuesday forecast.
These rapid fluctuations are common in the National Weather Service’s western regional forecasts during transitional seasons, where the geography of the Black Hills can create localized microclimates, leading to different conditions in Custer than those found in Rapid City.
The next confirmed checkpoint for the region will be the arrival of the Wednesday night cold front, which will determine if the mid-week showers materialize or if the system continues its northward trek toward the Canadian border.
Do you have thoughts on the shifting weather patterns in the Black Hills? Share this article and let us know in the comments how you’re preparing for the temperature swings.
