A dangerous multi-day flood threat is spreading across parts of the central and southern United States as deep tropical moisture tied to the remnants of Hurricane Polo moves north, with some areas facing the possibility of extreme rainfall on already saturated ground.
Meteorologist Travis Roberts, host of the Weather With Travis YouTube channel, said the wording from the Weather Prediction Center immediately caught his attention because forecasters are warning about “locally catastrophic” and potentially “life-threatening” flash flooding.
“Those are not words they throw around,” Roberts said.
The greatest concern on Tuesday will stretch from New Mexico into northwest Texas, the Panhandles and southeast Colorado, where heavy rain is expected to intensify as Polo’s remnants move farther inland.
Tuesday Night Could Be Especially Dangerous
Roberts said the core of the system will continue moving north through New Mexico and Texas, with the heaviest rain expected close to that track.
His biggest concern is the timing.
Some of the most intense rainfall could arrive after dark Tuesday night, when visibility is poor and people may be sleeping or less aware of rapidly changing conditions.
“That’s the part that concerns me the most,” Roberts said, noting that nighttime flash flooding can catch people off guard.
The main zone of concern includes central New Mexico, northwest Texas, the Texas and Oklahoma Panhandles and southeast Colorado.
Mountainous areas could receive more than 2 to 4 inches of rain, and Roberts said the problem is made worse by ground that is already soaked in some locations.
When the soil cannot absorb much more water, even a shorter burst of heavy rain can quickly turn into runoff. That makes low-lying roads, canyons and normally dry washes especially vulnerable.
A large number of flash flood watches were already in place across the region, according to Roberts.
Models Show More Than 6 To 8 Inches In Spots
Roberts also pointed to newer rainfall model data showing increasingly large totals across parts of Texas and Oklahoma.
Some model projections were beginning to show areas of more than 6 to 8 inches of rain.
“When you see that, it’s easy to understand why the Weather Prediction Center is putting out such strong wording,” he said.
The five-day rainfall picture becomes even more striking once the entire system is taken into account.
Heavy totals are forecast from the mountains of New Mexico and southeast Colorado northward through parts of Nebraska, Iowa and southern Minnesota, where some areas could see 2 to 4 inches with locally higher amounts.
Farther south, the heaviest corridor may eventually set up over central Texas and the Hill Country.
Roberts highlighted an area stretching from around Austin and San Angelo north toward Dallas, Wichita Falls and the Red River, then into Oklahoma City and farther east toward Tulsa and Norman.
Some locations could receive more than 4, 5 or 6 inches, he said, with thunderstorms capable of pushing localized amounts even higher.
That kind of setup becomes dangerous because rainfall totals can vary dramatically over relatively short distances. One community may receive manageable rain while another, only a few miles away, gets hit repeatedly by thunderstorms and ends up with a serious flash flood emergency.
Wednesday And Thursday Shift The Risk East
By Wednesday, Roberts said the main flood threat will begin moving eastward.
A slow-moving line of thunderstorms is expected to develop from around Wichita Falls south toward San Angelo and the Texas Hill Country.
That corridor could become the focus for another round of nighttime flooding.
By Thursday, the risk is expected to push farther into south-central Texas and southeast Oklahoma.
The moisture will not stay confined to Texas and New Mexico, either.
Roberts said rain will also spread north into Nebraska, Iowa, Minnesota, Wisconsin and northern Illinois, where periods of steadier rain could still become heavy at times.
Farther east, totals of 2 to 3 inches could eventually reach parts of Tennessee and Mississippi as the system continues its slow progression.
This is not shaping up as a storm that simply moves through in a few hours. Its slow movement is one of the most important parts of the forecast because it increases the chance of repeated rounds of rain over the same areas.
Mountains And Burn Scars Face Added Risk
Roberts said some of the more worrying conditions could develop in higher terrain across New Mexico and southeast Colorado.
As the remnants of Polo move north, moisture is expected to wrap around the low-pressure system and push up against mountain slopes.
That upslope flow can force moist air higher, encouraging even heavier rainfall.
Roberts specifically highlighted burn scar areas, canyons and steep terrain as places where flooding could become especially dangerous.
He also noted that the timing could place some of the strongest rain over southeastern Colorado during the overnight and early morning hours, roughly around 3 to 6 a.m.
“I don’t like the way this looks,” Roberts said while examining the forecast setup.
At the highest elevations, colder air may even allow some snow to mix in on the backside of the system, though flooding remains the much larger concern at lower elevations.
The mountain setup is worth watching closely because terrain can make water move much faster than people expect. A heavy storm miles away can send water rushing through a canyon or drainage area with very little warning.
Texas Could See Repeating Rounds Of Storms
Farther east, the deeper tropical moisture is expected to become focused across Texas and Oklahoma.
Roberts said that even in places where the ground has been unusually dry, flooding can still happen quickly because hard, dry soil may not absorb heavy rain efficiently.
That means water can run off almost immediately.
The bigger issue is that high pressure to the east may slow the storm system down, preventing the moisture from moving away quickly.
Roberts said that pattern could produce repeated rounds of showers and thunderstorms through the middle and latter part of the week.
“That is not a good look,” he said while examining the slower movement in the models.
Additional Gulf moisture may also stream northward into the region as the week continues, keeping much of the South wet into the weekend.
The system is expected to make some progress by Saturday, but Roberts said it may hang back long enough to create significant problems before that happens.
The Rain Threat Spreads Well Beyond The Southwest
Although New Mexico and Texas are the immediate focus, Roberts stressed that this is a much broader rainfall event.
Heavy rain is expected to move north through the central United States and then gradually shift east.
Parts of Iowa, southeastern Nebraska, southern Minnesota, Wisconsin and northern Illinois could all receive meaningful rainfall.
The central and southern Plains remain the more serious concern because of the stronger tropical moisture and potential for repeated thunderstorms, but the overall footprint of the storm is much larger than one state or one region.
Elsewhere, Roberts said the weakening nor’easter in the Northeast is producing much quieter conditions than over the weekend, while portions of western Canada and Alaska are seeing colder air and some snow.
Rain chances are also expected to increase in Florida, while much of the West Coast remains relatively dry.
Even so, Roberts kept returning to the same central message: the flooding threat tied to Polo’s remnants is the weather story that demands the most attention.
His final advice was simple.
“Stay weather aware as we move through the next couple of days,” Roberts said.
With the Weather Prediction Center using unusually strong language and several rounds of heavy rain still ahead, that warning carries particular weight, especially in areas where flooding may develop after dark or where terrain can cause water to rise far faster than expected.
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.
