Also, strong values of instability, storm-relative inflow, and wind shear can occasionally all be found north of a surface boundary. Since the WSR-88D mesocyclone algorithm does not search for meso-anticyclones, it is incumbent upon the forecaster to be alert to the possibility for these types of circulations. The traffic does bring in business, especially when there is an oil boom. Big Spring is at the crossroads of Interstate 20 and Highway 87. Being born and raised there, I was surprised it was that low. There were significant challenges to forecasters in real-time anticipation (or even appreciation) of the storm behavior in the Big Spring area. Big Spring was rate number five in an article called The Top 10 Ghetto Cities in Texas by. Also, a significant overhang was present in the updraft region on the northern flank of the storm. Also, the north wind supplied good inflow to this northeastward moving storm and induced strong vertical shear through the lowest 6 km.Īn analysis of WSR-88D VR/Shear on the Big Spring storm showed that a deep, persistent anticyclonic rotation was detected for at least two hours. Stable conditions are often found north of a surface boundary, however, high time resolution weather data from the USDA Agricultural Research Station in Big Spring suggested that surface conditions were quite unstable. North winds north of the boundary and southeast winds south of the boundary enhanced storm-relative inflow in both areas. Supercell thunderstorms developed in both areas with strong mesocyclones in the San Angelo area and strong meso-anticyclones in the Big Spring area. Alternatively, a hodograph depicting conditions in the San Angelo area showed positive helicity and favored persistent mesocyclones. Last year the weather condition was Light rain shower. Based on a 5 year average and a race date of July 8th, Big Spring, TX can expect temperatures between 77 and 96 with humidity around 65 and precipitation of 0.08'. The hodograph, adjusted for conditions near Big Spring, showed negative storm-relative helicity and a sufficient vertical wind profile to maintain storms with a persistent meso-anticyclone. For Monday the predicted weather in Big Spring is broken clouds with chance of slight rain reaching up to 0.01 inches (0.2mm). Big Spring Super Sprint Triathlon weather history. Low-level winds in the Big Spring area were northerly prior to the storm. The pairs to these splitting storms in each area quickly dissipated.
Indeed, storms did split across the region with left-split storms surviving north of the boundary, while right-split storms survived south of the boundary. The evening sounding taken at Midland revealed a straight-line hodograph with sufficient shear, indicating splitting storms could be expected. Storms initiated both north and south of the surface trough. This case study discusses the synoptic setting as well as characteristics of the storm as depicted on the Midland, Texas WSR-88D radar.Īn upper level shortwave trough was approaching the area, while at the surface a pre-frontal trough extended northeast to southwest between Big Spring and San Angelo, Texas. On the city of Big Spring, Texas was pummeled by a left-split supercell thunderstorm that produced tennis ball or greater size hail over half of this city of 25,000 people. Left-split supercell thunderstorms have been the subject of only a limited amount of research over the years. Lowest Pressure 984.P10.1 An example of a left-split supercell producing 5-inch hail: The Big Spring, Texas Storm of (2000 - Sept2000_20sls) 20th Conference on Severe Local StormsĪn example of a left-split supercell producing 5-inch hail: The Big Spring, Texas Storm of.Highest Pressure 1037.9 hPa Pagosa Springs, Wolf Creek Pass, CO.
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