Through Wednesday morning, a very stout and slow moving warm front had set up from just north of Stillwater to Kingfisher to Altus through the northern portions of the Texas Cap Rock Region. Within the warm sector, folks across central and southern Oklahoma and western north Texas awoke to very hot and muggy conditions as temperatures were quick to climb into the 70s and 80s with dew points in the mid to upper 60s from the OKC Metro to Wichita Falls. Overall, the skies remained well overcast, with a mid-level stratus deck blanketing the region. With the warm front stalled from north central Oklahoma through western north Texas and with warm moist surface conditions, the capping inversion along the Texoma region was quick to erode. Limited forcing through the late morning and noon limited convection across the region.
With skies beginning to clear across western north Texas through noon, a cumulus field started to intensify with clearing spreading into far southwestern Oklahoma. Through 1 pm CDT, initial updrafts along the warm front began to intensify, with the first storms feeding off the boundary, modifying its location in the process. From near 1:30pm through the overnight near steady development of strong to severe convection continued to be focused along the warm front from western north Texas through central Oklahoma.
With a rich environment of low level instability and intensifying deep layer shear, the most severe storms occurred across southwestern Oklahoma and portions of western north Texas. Supercells across the area produced five reports of brief tornadoes and numerous reports of quarter to golf ball sized hail, with reports of baseballs with storms across Comanche County. (More information can be found under Storm Data).
Details are continuing to be sorted out and this page will continue to be updated over the coming days.
More weather information (storm reports, weather maps, soundings, etc.) about this day can be found at this link: http://www.spc.noaa.gov/exper/archive/event.php?date=20130417
Dew Point: Background Image | Temperature: Countours/Numbers | Radar | Wind Barbs