Scattered strong/severe thunderstorms are possible across portions of Texas into western Louisiana Saturday.
SPC AC 201727 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1227 PM CDT Fri Apr 20 2018 Valid 211200Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM CENTRAL TX TO SOUTHWESTERN LA... ...SUMMARY... Scattered strong/severe thunderstorms are possible across portions of Texas into western Louisiana Saturday. ...Central TX into western LA... A mid- to upper-level low and associated trough will move southeast from the central and southern High Plains to the Ark-La-Tex region by daybreak Sunday. An arctic front over the southern High Plains will overtake a Pacific cold front during the day across north-central TX and the consolidated boundary will progress southeast to western LA and the shelf waters of the Upper TX Coast. Widespread clouds and rain are forecast through the early part of the day to the north of I-20 in north-central and northeast TX. There is considerable uncertainty to the degree of destabilization that may occur in wake of early-day rain. Some model guidance shows very little destabilization whereas the 12Z run of the GFS is by far the most aggressive in destabilizing the boundary layer across north-central TX. With those instability concerns mentioned, it appears the north extent of 60-65 dewpoints will advect into east-central TX by afternoon and only weak instability will develop. A couple of stronger storms are possible with an isolated hail/wind risk. This activity will grow upscale along the front and push into east and southeast TX after dark. A lingering threat for a damaging gust may remain into parts of southeast TX and southwest LA overnight Saturday night. ..Smith.. 04/20/2018 CLICK TO GET WUUS02 PTSDY2 PRODUCT NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
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