Local Forecast Discussion
000 FXUS65 KPIH 231147 AAA AFDPIH Area Forecast Discussion...UPDATED National Weather Service Pocatello ID 547 AM MDT Mon Apr 23 2018 .UPDATE...We did a quick update a bit ago to lower snow levels under the main frontal band to between 6000-6700ft across the eastern highlands and also along the Montana border to near Monida Pass. Snow is heavy enough at time to accumulate and create slick or slushy roads. Keyes && .PREV DISCUSSION... /issued 151 AM MDT Mon Apr 23 2018/ SHORT TERM...Today through Wednesday night. A decent band of rain/high mountain snow (along with a few thunderstorms) continues to shift east early this morning. As the low itself moves over eastern Idaho, it will starting digging more to the southeast. This will actually help drive showers, along with a more consolidated convergence band, south across the area this afternoon. We can expect a few thunderstorms, mainly along and east of I-15 but in reality...this pattern lends itself for a thunderstorm anywhere we get something going. Additional precipitation amounts will be less than 0.10" rain/1.0" snow in most cases after 6am. There will likely be some higher amounts across the Upper Snake Highlands and anywhere we get stronger showers/storms developing in the afternoon. It will be breezy at times outside of convection, 15-25mph with locally higher gusts. After today, high pressure builds again across the west as a blocking pattern tries to set up. The pattern shifts slightly west Wednesday, allowing a storm to clip the Divide. This should have no impacts on eastern Idaho. Otherwise, warm and dry weather returns with 70s returning by Wednesday. Look for chilly mornings and warm afternoon due to dry air settling in over us. Keyes LONG TERM...Thursday through Monday. Very warm and dry conditions will continue into late week. Then, looks like a low pressure system works into the Pacific Northwest. This will produce a threat of showers and thunderstorms heading into next weekend. Confidence remains low right now which is reflected in precipitation chances. Valle AVIATION... A low pressure system will move into the region today. This will produce breezy conditions along with scattered showers. Some lower ceilings are possible around showers. Valle HYDROLOGY...The warmer temperatures have begun to extend into the mid-level reaches with enhanced snowmelt producing bankful flow on the Blackfoot River above the Blackfoot Reservoir Sunday morning where a flood advisory has been issued through Monday. Strongly warmer temperatures over the latter half of the week will help to bring off some of the snow pack in the higher elevations with river rises anticipated heading into next weekend. Huston && .PIH WATCHES/WARNINGS/ADVISORIES... None. && $$
NWS PIH Office Area Forecast Discussion