Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 239 PM EST Sat Dec 11 2021 Valid 00Z Sun Dec 12 2021 - 00Z Tue Dec 14 2021 ...There is a Slight Risk of Severe Thunderstorms for parts of the Southeast and Tennessee Valley tonight... ...There are Slight Risks of Excessive Rainfall for parts of the central California Coast on Sunday and Monday... ...Heavy snow for the Cascades, Sierra and Northern Rockies; Critical Fire Weather risk for the Texas Panhandle... Severe thunderstorms in the East and heavy snow in the West will be our main weather threats over the next couple of days. A shortwave trough currently moving across the Midwest will continue to fuel dangerous severe weather activity across much of the eastern third of the country tonight. Widespread thunderstorm activity is also likely to continue spawning along a cold front, which is moving west to east through the Midwest and Lower Mississippi Valley. Damaging wind gusts are likely to be the main threat from these storms tonight across much of the Mid-Atlantic. Travel precautions and general vigilance should be taken by those who live in areas experiencing thunderstorms tonight due to reduced visibility. A deep upper-level trough will amplify and generate rich moisture advection into the Northwest and down through California over the next few days. Heavy coastal and low elevation rain is likely, especially over parts of central California on Sunday and Monday. Flash flooding will be a concern for these places, and particularly for burn scar areas where debris buildup can pose a threat to life and property. Heavy snow will fall over the Cascades, Sierra and Northern Rockies tonight. Between 1-3 feet can be expected for most of these mountain ranges with 3-4 feet more likely over the highest peaks of the Sierra by Monday evening. Winter Storm Watches, Warnings and Advisories are in effect for these areas. Heavy rain will spread into central and southern California by Monday night. Elsewhere, there's a Critical Risk of localized Fire threats across much of the Texas panhandle late Sunday afternoon due to warm temperatures, low humidity and increased winds (15-20mph). Anomalous warmth returns to the Central/Southern Plains on Tuesday. Kebede Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php