SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 PM CST Tue Feb 09 2021 Valid 101200Z - 111200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight across the contiguous United States. ...Synopsis... A powerful upper jet will reside over the Great Lakes/Northeast as the primary belt of strong westerlies extends from the Pacific Northwest through the Upper Midwest and into the Northeast. An upper trough over the Southwest will gradually move east and reach the southern High Plains by daybreak Thursday. In the low levels, a stationary front will arc from the Mid South into the Rio Grande Valley and westward to the southern Rockies. Strengthening low-level warm/moist advection in the right-entrance region of the upper jet by early evening, will lead to increased clouds and the development of showers and isolated thunderstorms, north of the stationary front from the Arklatex northeastward into the northern MS/western TN vicinity. Weak instability (MUCAPE ranging 200-1000 J/kg from TN to TX) will act to limit updraft vigor and severe weather is not expected. ..Smith/Cook.. 02/10/2021
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