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Forecast Discussion for Aberdeen, SD
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139 FXUS63 KABR 291107 AAA AFDABR Area Forecast Discussion...UPDATED National Weather Service Aberdeen SD 607 AM CDT Wed Apr 29 2026 .KEY MESSAGES... - Chances for light rain are possible today (20-40%) and Thursday (15-30%). Thunderstorms are possible Wednesday afternoon and evening, but no severe weather is anticipated. - High temperatures 5 to 15 degrees below normal expected through the work week, with highs in the 50s. Weekend highs will increase slightly into the 60s. && .UPDATE... Issued at 600 AM CDT Wed Apr 29 2026 See below for an aviation forecast discussion for the 12Z TAFs. && .DISCUSSION... Issued at 118 AM CDT Wed Apr 29 2026 Mainly clear skies and calm winds this morning under the influence of a high pressure center to the south. While guidance is somewhat inconsistent, conditions appear somewhat favorable for some patchy fog development early this morning. Main area that would see development appears to be in the James River Valley around 12Z. At this time confidence is low on any widespread development of low visibilities, but can`t rule out some patchy areas of visibility below 3 miles at times. Any fog that does develop should dissipate fairly quickly after sunrise when winds pick up slightly. Right entrance region of an upper-level trough will sit over the Northern Plains for the next couple of days, leading to some chances for rain showers to develop both today and Thursday afternoon under very similar setups both days. Jet streaks aloft riding down into the trough will provide divergence aloft, with steep low-level lapse rates aiding in convective development. Model soundings do show some potential for a capping inversion aloft (above the 700-600mb saturated layer) that may limit the growth of the potential developing showers. However the marginal MUCAPE ( |
Previous Forecast Discussions may be found at
NWS Aberdeen, SD (ABR) Office Forecast Discussions.
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