One very important factor I believe in being a meteorologist is to admit a busted forecast, when wrong. That’s exactly what happened in my forecast that I issued out a couple of days ago. I said our rain chances would end by Friday/Saturday morning. Here it is on a Sunday, and there are still showers and thunderstorms popping up on radar in the Rio Grande Valley. The cause of these showers and storms is an upper-level shortwave trough over Mexico, influenced by the mountains. Their movement is east-southeast. Figure one shows the general location of genesis of where these storms are forming.
These storms did spawned a severe thunderstorm warning for much of Zapata County and parts of Starr County. These storms are still producing heavy rainfall, up to 1.5″/hour and small hail. Most of the rainfall will stay in the 4 counties north of the RGV, however, portions of northern Starr and Hidalgo, as well as Willacy County may see a shot at some decent amounts of rainfall depending if these storms hold together.
For the rest of today, expect a mix of sun and clouds after these storms and showers pass. Clouds are expected to break a little for tonight. Temperatures will be in the middle to upper 60s, with low humidity.
Edinburg’s 3-day Forecast: