Minor flooding began April 21st on War Eagle Drive in Hailey. Through access through the Della View neighborhood was shut down in western Hailey.
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The episode as NWS PIH wrote it up.
Minor flooding began April 21st on War Eagle Drive in Hailey. Through access through the Della View neighborhood was shut down in western Hailey.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pocatello, ID wrote its last area forecast discussion before the first event at Apr 20, 1:11 PM MST, 11 hours 49 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 211 PM MDT Sat Apr 20 2019 .SHORT TERM...Tonight through Monday. Upper trough shifting into coastal states per satellite imagery. Low fairly wrapped with center over northern California this afternoon. Weak shortwave shifting northeast through Nevada ahead of main trough helping to produce convection over East Idaho. Cloud cover left over from weak convection overnight helped to limit instability most areas but some convection able to fire early this afternoon over southern highlands. This region was pinpointed to be favorable by several of the convective allowing high res model runs, so have given greater weight to these solutions for tonight into Sunday. Initial convection looks to shift east through early evening then dissipate in favor of broader area of weak convection taking shape over western portions of the forecast area. In both cases, soundings favor potential for gusty outflow winds in the 40-45mph range and very small hail. Base of trough shifts into western Utah overnight, with main low closing off over central Nevada. GFS and NAM have come into better agreement regarding this feature, which would maintain potential for convection continuing overnight through more of the forecast area. Still believe best precip potential will remain over southern highlands, given better proximity to main dynamic feature. As upper low continues to shift south through the day Sunday, expect deepest moisture and best dynamics to wrap closer to the low, though extended trough axis over the region will allow showers to continue through the day Sunday. Best chance for thunderstorms appears to be along the WY border, and especially toward the Bear Lake region. Cooler air spilling into the central mountains and most of the Snake Plain behind the trough axis will limit the instability potential for those areas. Surface pressure gradient is still forecast to tighten behind the trough with both NAM and GFS guidance hitting 15-20kts sustained for most of the Snake Plain. Precipitation gradually diminishes Sunday night into Monday as effects from the trough shift further south and upper ridge tries to nose into the state from the west. DMH .LONG TERM...Monday night through Saturday. Upper ridge tilts over through East Idaho through Tuesday night. Fast moving but weak shortwave slides through PacNW across Idaho panhandle into Montana mainly Tuesday. There are some differences in how the GFS and ECMWF want to handle this feature, but in general, both models portray weak orographic showers mainly across the Divide region. GFS is a little more aggressive and pushes precip a little further south toward the Utah border through Wednesday. Another ridge tries to develop through the Great Basin, but the northern extent of the ridge remains flat, and the GFS maintains a little bit more instability and moisture than the ECMWF. Thus the blends trended slightly wetter across the region. By Friday, next trough pushes inland. GFS is able to capitalize on its already wetter solution, and drastically increases the precip chances for Friday into Saturday. DMH && .AVIATION...Increased potential for thunder this afternoon as we approach peak heating. VCTS should continue through the evening hours as an upper low deepens over the West. Eventually the low will deepen further and drop to our south, however slight nuances between GFS/NAM. NAM is slightly faster to cut off the low, and the resulting precip wraps around the low about 3 to 6 hours earlier while the GFS pushes precip further eastward. Both models carry a significant bullseye of precip, though placement will be challenging. Will likely see ceilings drop to MVFR or even IFR late tonight through tomorrow with some heavier precip possible over KBYI and KSUN, particularly if the NAM solution holds true. Hinsberger && .HYDROLOGY...Have maintained most of the hydrologic products today as East Idaho rivers remain steady or with slow increases indicative of the snowmelt and anticipated rainfall from this weekend spring storm system. Portneuf River has already risen above flood stage, and Big Wood River producing nuisance ponding and seepage in residential areas along the banks. Snake River remains elevated as well, and many others remain or approach bankfull. Spring storm system beginning to make effects known with rainfall becoming more widespread across the hydrological area into tonight and Sunday. Cooler temperatures on Sunday will help to mitigate some of the mid and upper elevation snow melt, but the addition of the rain will continue to help things along. Expect a turn toward drier conditions for early in the week along with another warming trend, but East Idaho could be looking at additional precipitation later in the week. Regardless of the details, the message is this: spring snowmelt and river impacts are here and will continue for the upcoming weeks. DMH && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Minor flooding began April 21st on War Eagle Drive in Hailey. Through access through the Della View neighborhood was shut down in western Hailey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2019Every state in 2019This day in weather historyWarnings in Idaho, April 2019
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 820179.