Meteorologist Ryan Hall, speaking on his Ryan Hall, Y’all forecast channel, said a major pattern shift is now taking shape across the United States, and it could make this week rough for a very large part of the country. In Hall’s telling, this is not just a simple thunderstorm setup or a routine spring rainmaker. It is a broad, powerful system that could bring everything from severe thunderstorms in the Plains to heavy mountain snow in the West and a major cooldown behind the front.
Hall described it as a coast-to-coast weather maker, the kind of system that grabs attention because it affects so many regions in so many different ways. One side of the storm may be dealing with dangerous hail and tornadoes, while another sees chain controls, near-zero visibility in the mountains, or a steep drop in temperatures once the cold air pours in.
That is what makes this setup so striking. It is not just strong in one place. It stretches across the map and changes character as it moves, which is usually a sign that people need to pay closer attention than usual.
A Big Western Storm Starts The Chain Reaction
According to Hall, the same Pacific system that had been moving toward the coast is now set to push inland and begin a weeklong march across the country. He said the storm would hit California first, then work eastward through the Rockies and Plains before finally reaching the East Coast by the weekend.
In Ryan Hall’s forecast, California is first in line for impacts. He said lower elevations could see around a half-inch to an inch of rain, while the coastal ranges in parts of the North Bay mountains could pick up as much as three inches.
The Sierra Nevada, meanwhile, sits in the middle of the snow zone. Hall warned that one to two feet of heavy, wet snow could fall there, with snow levels dropping as the system moves inland. He said those snow levels could fall from around 6,500 feet down to 4,500 feet by Wednesday, which could make travel through the mountain passes especially difficult.
He also mentioned a marginal flash flood risk for the Bay Area and Sacramento. If that were not enough, Hall said there may even be enough instability for embedded thunderstorms within the system, along with gusty southerly winds and a low-end chance for funnel clouds or weak tornadoes.
That is a lot to stack on top of one storm. Heavy snow, flooding, thunderstorms, gusty wind, possible mudslides near burn scars, and even a small tornado concern is the kind of mix that reminds you how messy spring weather can get when a deep upper-level trough comes ashore.
Southeast Texas Faces A Different Kind Of Trouble
While the West deals with snow and flooding, Hall said another threat is quietly setting up farther south. In his forecast, southeast Texas, including Houston, could be in line for repeated rounds of heavy rain through Wednesday.
He explained that a lingering frontal boundary may act like a set of train tracks for thunderstorms, allowing cells to move over the same places again and again. Meteorologists call that training, and Hall stressed that it can turn a normal rainy day into a flash flood problem fast.
He said the heaviest rain is likely from Tuesday afternoon into Wednesday, with Gulf moisture running very high for this time of year. In fact, Hall noted that atmospheric moisture levels could be in the 90th percentile, which helps explain why some storms may be capable of producing two to three inches of rain per hour.
For Houston, that is a real concern. Hall said heavy rain over already wet ground could quickly flood intersections and low-lying underpasses, especially if one stronger storm parks over the metro during a busy part of the day.
That part of the forecast feels especially important because flash flooding often gets less attention than tornado talk, even though it can ruin travel plans, trap drivers, and create dangerous situations in a matter of minutes. Hall was clearly trying to remind viewers not to ignore the flood side of this storm just because it does not have a dramatic name attached to it.
A Calm Midweek Break Gives Way To A Bigger Threat
Hall said Wednesday should be much quieter in parts of the upper Midwest. Cities like Madison and Dubuque were expected to enjoy one of the nicer spring days they have seen in a while, with dry air, little chance of rain, and highs reaching the 70s in many inland spots.
Along Lake Superior, cooler air may hold temperatures down in the 50s, but Hall made it sound like a rare and welcome break for an area that has already seen repeated rounds of rough weather.
That calmer weather, though, is not expected to last. In fact, Hall used it almost like a contrast point, because just to the south and west, the atmosphere is preparing to turn much more hostile by Thursday.
He specifically singled out Omaha, Kansas City, and Oklahoma City as places that need to stay alert. Ryan Hall said Thursday is the day people along that corridor need to be “locked in,” and he made it clear that his confidence in a major severe weather outbreak was growing.
Thursday Could Become One Of The Biggest Severe Weather Days Of The Year
Hall pointed to a large Storm Prediction Center risk area stretching from Omaha through Kansas City and down into Oklahoma City. He said the latest data had pushed the threat farther north than earlier thinking, bringing more of Missouri and Iowa into focus.
The big uncertainty, according to Hall, is the cap, which is a layer of warm air aloft that can keep storms from forming too early. If the cap holds, storm coverage may stay more isolated. But Hall warned that any storm that does break through could become a monster because of the explosive instability waiting underneath.
He said the most dangerous time window likely opens between 4 p.m. and 10 p.m. Thursday. The setup involves rich Gulf moisture surging north, colliding with a sharp dry line and an advancing cold front, which is the kind of combination that often leads to volatile weather across the Plains.
Hall said people along the I-35 corridor from Des Moines down to Norman are pretty much in the danger zone. He is leaning toward explosive thunderstorm development, with initial storms capable of producing large hail, damaging winds, and a tornado threat, though he said it is still too early to pin down tornado details precisely.
What stood out most in Hall’s forecast was not just the mention of supercells, but how he expects the event to evolve after dark. He said this could become a classic two-phase setup, with isolated supercells in the afternoon giving way to a widespread line of storms by evening.
The Overnight Wind Threat May Be Especially Dangerous
Hall said he is leaning more heavily into the damaging wind threat now than he was earlier. In his view, the supercells that first develop may merge into a solid line as the evening goes on, thanks to wind patterns aloft that favor that kind of transition.
That would create what he described as a QLCS, or a squall line, capable of producing 70 to 80 mile-per-hour winds. Hall said that is strong enough to knock around fences, throw outdoor furniture, and send debris flying through neighborhoods.
He also made a point that many people forget: a line of storms does not mean the tornado threat vanishes. Hall explained that quick, rain-wrapped spin-up tornadoes can still form inside that advancing wall of wind and rain.
He expressed particular concern about overnight impacts in places like Davenport and St. Louis, where people may be asleep when the line arrives. That is always one of the hardest parts of severe weather. A storm at 5 p.m. is dangerous, but a storm at 2 a.m. can be worse simply because people are less likely to get the warning in time.
Friday Reloads The Threat Farther South
By Friday, Hall said the storm is far from done. Instead, it appears ready to reload across Texas and the Midsouth, with a new severe weather risk stretching from Dallas through Little Rock and up toward Fayetteville.
He said this day could be just as bad as Thursday, or possibly worse, because the atmosphere ahead of the front may become extremely unstable with no cap at all. In simple terms, that means storms may not have much standing in their way once they begin to fire.
Hall expects the threat window to open Friday afternoon and continue into Friday night. He said wind shear should be strong enough to support rotating storms, while very rich Gulf moisture adds even more fuel.
The hazard list looks familiar, but still serious: supercells, very large hail, tornadoes, and additional heavy rain. Hall said the hail on Friday may be less about rare giant stones and more about widespread two-inch hail, the kind that can tear into crops and damage vehicles and homes over a broad area.
He also warned that repeated rounds of rain could train across parts of Arkansas into the weekend, raising the risk for localized flash flooding there as well.
A Week That Could Turn Fast In A Hurry
Ryan Hall’s message was clear from start to finish: this is a high-impact weather pattern, and it is going to be felt in very different ways depending on where you live. The West may deal with heavy snow and flooding. Southeast Texas may wrestle with flash flood concerns. Then the Plains and Midsouth may take the brunt of a more dangerous severe weather outbreak later in the week.
What makes Hall’s forecast so compelling is that he did not frame this as one neat, single event. He described a system that keeps changing shape, keeps reloading, and keeps finding new ways to cause problems as it moves east.
That is often when weather gets most serious, not because every forecast point becomes a disaster, but because the atmosphere stays primed long enough for at least one part of the setup to overperform. And when a meteorologist like Hall starts warning that a day could become one of the season’s most impactful, that is not something people in the risk zone should shrug off.
Growing up in the Pacific Northwest, John developed a love for the great outdoors early on. With years of experience as a wilderness guide, he’s navigated rugged terrains and unpredictable weather patterns. John is also an avid hunter and fisherman who believes in sustainable living. His focus on practical survival skills, from building shelters to purifying water, reflects his passion for preparedness. When he’s not out in the wild, you can find him sharing his knowledge through writing, hoping to inspire others to embrace self-reliance.
