Area Forecast Discussion
Issued by NWS Huntsville, AL

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000 FXUS64 KHUN 191656 AFDHUN Area Forecast Discussion National Weather Service Huntsville AL 1156 AM CDT Mon Apr 19 2021 .UPDATE... For 18Z TAFS. && .NEAR TERM...(Rest of Today) Issued at 856 AM CDT Mon Apr 19 2021 Tranquil conditions this morning across the Tennessee Valley region, as an upper-level ridge of high pressure builds into the area. The end result will be clear and sunny conditions, thanks to the strong subsidence in place. A cool, dry air mass has created a little bit of a chill in the air early this morning. However, with plenty of sunshine, temperatures should warm to around the 70 degree mark across most of the area today. Overall, an absolutely beautiful Spring day for everyone to enjoy. Forecast remains on track and only minor adjustments were made based on current temperature trends. .SHORT TERM...(Tonight through Wednesday) Issued at 235 AM CDT Mon Apr 19 2021 The quiet wx pattern will continue tonight/into Tue, as the sfc high moves ewd across the region, while an upper trough axis rotates thru the nrn/mid Plains states. Lows early Wed look to fall into the mid 40s for most spots, before temps rebound into the lower 70s later in the day Tue. Moisture will then begin to filter back into the area from the south late Tue, as the sfc high moves east into the mid/srn Atlantic states. A sfc wave associated with the upper trough pattern will then lift NE into the OH Valley Tue night, as an attendant cold front pushes ewd across the SE region. This front should move thru the mid TN Valley late Tue night into early Wed, with perhaps a few light showers developing along the front over portions of the area north of the TN River. This front will also usher in some noticeably cooler/drier air later in the day Wed, with afternoon highs trending more in the upper 50s, as cloud cover quickly diminishes. .LONG TERM...(Wednesday night through Sunday) Issued at 235 AM CDT Mon Apr 19 2021 This influx of cooler air will translate into perhaps some near record lows Wed night, as temps fall into the mid/upper 30s. This should also result in areas of frost developing into early Thu. Another strong dome of high pressure out of the Plains states will then build into much of the ern CONUS Thu, as afternoon temps trend a few degrees warmer, with highs in the lower 60s. The cooler air will linger into early Fri, with lows in the upper 30s/lower 40s, before temps rebound slightly more into the mid 60s during the afternoon hrs Fri. Moisture will then again spread back into the region Fri night, as an upper trough axis drops well into the srn Plains and an attendant sfc low develops across the wrn Gulf Coast. The latest global model spreads continue to diverge with the eventual track of this sfc wave more into the cntrl Gulf states late Fri night into Sat. Any impact wx concerns will be dependent on the movement of the warm front nwd, as the upper trough pattern translates ewd into the SE states. The latest blended model guidance suggests some instability developing across much of the area into the weekend period, which may result in a few embedded tstms within increasing showers. Further model runs will hopefully provide a better consensus on the prob for any tstms and its associated wx impacts. In any case, lingering rainfall should taper off to the east Sat evening, as the sfc low lifts into the mid Atlantic Basin, with cloud cover diminishing into the day Sun. Highs this weekend look to climb into the upper 60s/near 70F, while lows trend in the upper 40s/around 50F. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1156 AM CDT Mon Apr 19 2021 VFR conditions will prevail at each terminal through the period. Scattered decks of Cu, with ceilings around 2.5 kft will dissipate after sunset. The end result will be a mostly clear sky, with light winds through the remainder of the period. .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && $$ NEAR TERM...AMP.24 SHORT TERM...09 LONG TERM...09 AVIATION...AMP.24 For more information please visit our website at weather.gov/huntsville.

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