Storms around Dallas-Fort Worth should be isolated Tuesday, but slow-moving downpours could still produce localized flooding. The latest National Weather Service forecast places the greater Tuesday flood concern along and south of U.S. 84, rather than in the DFW core.
That geographic distinction refines a broader outlook from CBS Texas, which reported that most of North Texas remained under a level 2-of-4 flash-flood risk. CBS forecast a 40% chance of rain Tuesday afternoon, with the highest expected chances from 4 to 10 p.m.
The two forecasts leave DFW residents with a more specific picture: rain is possible in the metro area, coverage should be limited, and an isolated storm could still bring heavy rain, gusty winds or frequent lightning. Severe weather is not expected, according to the weather service.
Tuesday storm timing differs between the forecasts
In its 12:57 a.m. Tuesday forecast discussion, the National Weather Service said isolated showers and thunderstorms could begin developing over North Texas from late morning into early afternoon. The agency expected that activity to dissipate quickly around sunset.
CBS Texas gave a later and somewhat wider window in its Tuesday forecast, putting the highest expected rain chances between 4 and 10 p.m. and assigning a 40% chance for the afternoon.
The overlap is the afternoon and early evening. The newer NWS discussion, however, does not describe widespread storm coverage in the DFW area. It calls for isolated development and has storms ending around sunset, while the CBS window extends to 10 p.m.
For people making plans around the forecast, the practical timing to watch begins in the late morning, continues through the afternoon and may reach the early evening. The available forecasts do not identify one metro-area location where a storm is certain to develop.
Dallas has the highest listed city probability
The NWS forecast listed a 40% Tuesday precipitation probability for Dallas. Dallas-Fort Worth, Denton and McKinney each had a 30% probability.
- Dallas: 40%
- Dallas-Fort Worth: 30%
- Denton: 30%
- McKinney: 30%
Those city figures support the NWS description of isolated coverage across North Texas. They also add local detail to the 40% regional afternoon chance reported by CBS Texas. Dallas matches that 40% figure, while the other listed DFW locations are at 30%.
This is a different setup from the broader storm concern described in DFW Daily Brief’s Sunday forecast coverage, when the weather service listed a 50% precipitation probability for Dallas-Fort Worth, Dallas, Denton and McKinney. Tuesday’s listed probabilities are lower in all four places.
Why isolated flooding remains possible
The limited storm coverage does not eliminate the possibility of a localized flooding problem. The weather service cited slow storm motion and atmospheric moisture of 1.75 to 2.25 inches as factors that could support isolated flash flooding.
At the same time, the NWS discussion placed the greater Tuesday concern along and south of U.S. 84, outside the DFW core. That is the key qualification to the broader level 2-of-4 risk across most of North Texas reported by CBS.
In other words, the approved forecasts do not show the same degree of concern everywhere. DFW remains within the area where isolated showers and storms may form, but the weather service identified the greater flash-flood concern farther south.
Recent rainfall provides important context for any additional downpour. CBS Texas reported that most of the region received 1 to 3 inches Monday. It reported much higher totals of 5 to 7 inches in Lewisville and western Fort Worth, while isolated southern locations received 5 to 9 inches.
Those totals also show how sharply rainfall varied by location Monday. Most of the region was in the 1-to-3-inch range, but Lewisville, western Fort Worth and isolated southern areas received substantially more. Tuesday’s forecast again describes a localized threat rather than an equal rain or flood outcome across North Texas.
Wind and lightning are possible, but severe weather is not expected
A couple of Tuesday storms could become strong, according to the weather service. The main hazards identified in the discussion are gusty winds and frequent lightning.
The NWS did not expect severe weather. That keeps the forecast emphasis on isolated heavy rain, localized flooding, gusty winds and lightning rather than a broader severe-storm episode.
Because storm coverage is expected to be isolated, some DFW locations may receive a storm while others do not. The approved forecasts do not provide expected rainfall totals for individual DFW cities Tuesday, so Monday’s location-specific amounts should not be treated as Tuesday predictions.
Wednesday could bring broader storm coverage
Tuesday is not the end of the storm chances. The weather service forecasts another round of scattered storms Wednesday, potentially with greater coverage across North Texas.
Wednesday may also bring another isolated flash-flooding risk. The NWS discussion does not provide city precipitation probabilities for Wednesday in the approved material, but it does distinguish the day from Tuesday by describing potentially greater storm coverage.
The clearest Tuesday takeaway for DFW is a lower-coverage forecast with a localized hazard: Dallas carries a 40% precipitation probability, Dallas-Fort Worth, Denton and McKinney are at 30%, and isolated storms may develop from late morning into the afternoon before fading around sunset. The greater Tuesday flood concern is south of the metroplex, but a slow-moving DFW downpour could still cause isolated flooding.
