Area Forecast Discussion
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
480 FXUS65 KPIH 211849 AFDPIH Area Forecast Discussion National Weather Service Pocatello ID 1249 PM MDT Sat Sep 21 2024 .SHORT TERM...Tonight through Sunday night. A series of weak shortwave will work through the area through the short term. Atmosphere is too dry for much more than some high cirrus with these systems. Winds are expected to remain light. However, there is a 20 to 30 percent chance of some gusts over 20 mph Sunday night as the strongest of these systems moves through our area. Overnight lows tonight will once again be in the upper 30s to low 40s for the valleys with highs on Sunday just a touch warmer in the low 70s for the valleys. Lows Sunday night for the valleys expected to be in the low to mid 40s as the weak system pushes through the area and winds keep the lower atmosphere stirred up somewhat. 13 .LONG TERM...Monday through Next Friday. After a pretty quiet weekend, it looks like we`ll continue to see fairly quiet weather in the week ahead, too. On Monday, a weak trough will be passing through, but it won`t bring much to the area aside from a minor drop in afternoon highs (to the upper 60s and low 70s) , increasing cloud cover, and about a 10 percent chance for a few showers up near the Island Park/Driggs areas. After this trough passes through, high pressure builds back in through midweek with highs warming into the mid 70s on Tuesday and upper 70s to even low 80s on Wednesday which looks to be the warmest day of the week. The second half of the week will be more the beginning in that a few systems will move through farther to our north and we just get a glancing blow of weak troughing to impact us on Thursday and Friday to drop our highs by a couple of degrees each day an push wind gusts into the 20 to 25 mph range, but overall little to no precipitation is expected. There will be a 10 to 20 percent chance for areas farther north as the trough swings through next Saturday, but most will remain dry through the week ahead. AMM && .AVIATION...Besides some high cirrus over the region, conditions will remain vfr over the next day or so and winds look mainly light. Expect upvalley winds to continue at SUN until around 03z and then become downvalley overnight. 13 && .FIRE WEATHER...An area of low pressure well to our south will continue moving eastward through the weekend, allowing weak high pressure to build in over the area for the rest of today and most of Sunday. This will bring continued warm temperatures as highs increase by a couple of degrees for Sunday and no precipitation is expected. Late Sunday into Monday, a weak trough passes through and will cool us down a couple of degrees again, increase cloud cover, and bring only a 10 percent chance of a shower up in the Island Park/Driggs area on Monday. After that trough moves through, high pressure builds in again and high warm back up to the mid and upper 70s for the rest of the week. Even as we warm, minimum relative humidities only fall to about 20 percent at their lowest during the week and wind gusts will generally stay in the 10 to 20 mph range. Overall, not seeing any near-critical or critical fire weather conditions for much of the week ahead. AMM && .PIH WATCHES/WARNINGS/ADVISORIES... None. && $$