From the National Weather Service, Norman Forecast Office:
(For UPDATED National Weather Service, Norman information go to: http://www.srh.noaa.gov/oun/ )
This hazardous weather outlook is for portions of northern… western…central…and southern Oklahoma…and western north Texas.
Day one…today and tonight…
Thunderstorms… there is a risk of severe thunderstorms through tonight across portions of western and central Oklahoma… and all of western north Texas.
Location… The most likely area for severe storms is west of a line from Shawnee and Sulphur… to Marietta, Oklahoma.
Timing… The most likely time for severe storms will be from 4 p.m. to 1 a.m.
Impacts… The primary hazards will be damaging hail to the size of golf balls or larger and straight-line wind gusts up to 80 mph.
Discussion… A few showers and isolated thunderstorms associated with a mid- level disturbance will affect parts of western Oklahoma this afternoon. None of these storms are expected to be severe.
Meanwhile… an upper level trough will approach and move across the region today and tonight. A dryline is then expected to develop in the eastern Oklahoma and Texas Panhandles later this afternoon. Thunderstorms will likely initiate near the dryline and move east into western portions of Oklahoma and western north Texas late this afternoon and early this evening. These storms initially could be discrete as they approach the area but are expected to congeal into a squall line which will continue to move east across the area this evening and overnight. Some of these storms will likely become severe due to moderate instability and strong wind shear. Large hail up to the size of golf balls or larger and wind gusts to 65 mph will be the main concern with the initial discrete storms. The main concerns will then shift to damaging straight line winds of up to 80 mph and hail to the size of half dollars with the squall line later this evening and overnight. Thunderstorms will likely continue into thursday morning but the severe potential will diminish after 1 a.m.
.Days two through seven…Thursday through Tuesday…
Thunderstorms… Severe storms are expected Saturday and Sunday when a large storm system approaches the Southern Plains. Those who are planning or participating in outdoor activities in the weekend need to pay particularly close attention to weather forecasts.