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Short Range Public Discussion
(Caution: Version displayed is not the latest version. - Issued 1945Z Mar 18, 2023)
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 345 PM EDT Sat Mar 18 2023 Valid 00Z Sun Mar 19 2023 - 00Z Tue Mar 21 2023 ...Much below normal temperatures to engulf much of the East & South through Monday; lingering lake effect snow showers tonight & Sunday... ...Next round of rain and heavy mountain snow, colder than normal temperatures expected throughout the West into next week... ...Scattered showers and thunderstorms across Florida... Cyclonic flow across the Great Lakes will continue to trigger lake effect snow showers across parts of the northern Michigan and down wind of Lakes Erie and Ontario tonight and into early Sunday. A passing surface trough over New England on Sunday will allow for another day of scattered snow showers across the Northeast, while high pressure building in from the southwest shuts off the lake effect snow machine by Sunday afternoon. Speaking of that area of high pressure, this feature is responsible for the surge of much below normal temperatures across the much of the Nation's Heartland and into the Mid-South on Sunday. Numerous Freeze Warnings have been posted from north Texas to the North Carolina coast through for both Sunday and Monday mornings. A handful of record breaking cold min and max temps are expected across the South both Sunday and into Monday morning. The abnormally cold temperatures extends as far south and west as West Texas, where Winter Storm Warnings and Weather Advisories are in effect through Sunday morning due to periods of snow falling in the higher terrain and Big Bend region of West Texas. The dome of below normal temperatures will linger through Monday across the South while the Midwest and Northeast gradually moderate to more seasonal temperatures by Monday afternoon and into Tuesday. The West will feature the most active weather pattern to close out the weekend and kick-off the upcoming week. A storm system is set to deliver Pacific moisture into California and as far north as the Pacific Northwest on Sunday. The heaviest snowfall is forecast to occur in the Sierra Nevada and northern California on Sunday where snowfall totals up to 12 inches are forecast in the higher terrain. Winter Storm Warnings have been posted for the northern Sierra Nevada where some snowfall amounts could range between 1-2 feet with wind gusts climbing as high as 50 mph. Moisture associated with this storm system will spill into the Great Basin and the Rockies on Monday, resulting in periods of mountain snow and valley rain showers. Snowfall totals are forecast to surpass a foot in the higher elevations of the Great Basin, the Wasatch, and the western Colorado Rockies. Periods of mountain snow look to continue over the Rockies late Monday and into Monday night, while the next Pacific storm system approaches California on Tuesday. Not only will there be mountain snow and valley/coastal rainfall, but temperatures will remain abnormally cool throughout the West into the first half of the week. Farther south, a cold front tracking south through the Florida Panhandle today is producing scattered showers and thunderstorms across the northern Panhandle this afternoon. The cold front will continue its march south producing spotty showers across northern and central Florida tonight and eventually over South Florida by Sunday afternoon and evening. By Monday, the front will be well south and east of Florida, with residual showers on Monday dissipating or tracking out to sea by Monday afternoon as high pressure builds in from the north. Mullinax Graphics available at