A cold front moved through the region, bringing severe winds to the Magic Valley. This brought brief power outages to areas near Twin Falls, otherwise minor impacts were reported.
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOI wrote it up.
A cold front moved through the region, bringing severe winds to the Magic Valley. This brought brief power outages to areas near Twin Falls, otherwise minor impacts were reported.
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 Boise, ID wrote its last area forecast discussion before the first event at Nov 19, 10:04 AM MST, 56 minutes earlier.
Area Forecast Discussion
National Weather Service Boise ID
1004 AM MST Sun Nov 19 2023
.DISCUSSION...Radar and surface observations as of 10AM MST
indicate precipitation is starting to taper off, with mostly dry
conditions across southeast Oregon and the Lower Treasure
Valley. However, aided by upslope northwesterly flow, rain (snow
above 5000 feet) continues in the Upper Treasure Valley into
the Magic Valley and southwest Idaho mountains. Precipitation
will continue through late this morning before tapering off and
becoming confined to the mountains of southwest Idaho this
afternoon as the trough axis moves through, with only isolated
showers elsewhere. Winds have increased across the area behind a
cold front, with gusty winds persisting through the day today.
Winds will be strongest south and east of Boise into the Magic
Valley, where a Wind Advisory is in effect today for gusts up to
50 mph. Temperatures today will average around 10 degrees
cooler than yesterday, but the wind will make it feel even
colder. The forecast remains on track and no updates anticipated
this morning.
&&
.AVIATION...Mainly VFR to MVFR, with low cloud and widespread rain
and snow this morning as a cold front crosses the region. Snow level
falling from a range of 3000 ft west to 6000 ft east this morning to
all below 3000 ft this evening. Mountains obscured. Precipitation
will end in SE Oregon by 19/18z and SW Idaho by 20/00z. Isolated
snow showers may linger over higher terrain of SW Idaho through
20/06Z. Surface winds: W-NW 15-30 kt with gusts 30-45 kt, becoming
mostly light and variable except 10-20 kt from KMUO south and east
by 20/12Z. Gusty winds will persist through the day with the
strongest gusts mostly south and east of KBOI. Winds aloft at 10k
feet MSL: NW 20-35kt.
&&
.PREV DISCUSSION...
SHORT TERM...Today through Tuesday night...Showery and windy
weather today as the upper low advances inland from the coast.
The accompanying cold front which has entered SE Oregon early
this morning, will cross into s-central Idaho shortly after
sunrise. A tight surface pressure gradient behind the front
will support sustained winds of 20-35 mph and gusts of 35-50 mph
across open terrain, the strongest of which will focus over the
Snake Plain south and east of Boise. The gusty winds and cooler
temperatures will make for a notable windchill today, with
windier/colder spots seeing values below freezing through the
day. Precipitation tapers off from west to east through the day,
clearing SE Oregon early this morning and retreating into the
SW Idaho mountains by early afternoon. Snow levels are around
6kft MSL ahead of the front early this morning, but will fall to
3500-5000 feet by late afternoon. The heaviest snowfall will be
across higher mountains this morning, with mountain valleys
seeing minor amounts this afternoon as precipitation scatters
out. All areas are dry tonight as the low exits eastward. Not
expecting much fog formation overnight with mixing/wind still
in play, but areas of low stratus could form along the
foothills in the Snake Plain, and other favored upslope areas.
Monday is dry and cool as a building upper ridge keeps the area
under northerly flow. The upper ridge moves inland and begins to
flatten on Tuesday as another trough approaches the Pac NW
coast. While the warming aloft will bring more stable
conditions, an increase in easterly winds across open terrain
will limit development of stagnant conditions to the lowest
elevations on Tuesday. Temperatures are within a few degrees of
normal through the period.
LONG TERM...Wednesday through Sunday...A trough and associated
cold front will move through the region late Wednesday and into
Thursday morning. Breezy winds, a quick shot of precipitation,
and much cooler temperatures will accompany the cold front.
While models continue to show differences in precip amounts, the
bulk of the moisture is expected to fall along the Nevada
border of SE Oregon and SW Idaho. Snow levels will fall between
5000-6000 ft MSL as this system passes through, with most higher
elevations seeing snow accumulations between a dusting and an
inch. Temperatures will continue a cooling trend thereafter as
northerly flow aloft develops and arctic air advects into the
region. By next weekend, the Treasure Valley will see high
temperatures in the mid to upper 30s.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Wind Advisory until 11 PM MST this evening IDZ014-016-030.
Wind Advisory until 5 PM MST this afternoon IDZ015-029.
OR...None.
&&
www.weather.gov/Boise
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DISCUSSION...ST
AVIATION.....SP
PREV SHORT TERM...DG
PREV LONG TERM....ALThe national radar mosaic for the moment the first event began.
3 high wind, 1 strong wind. Local standard time, as filed.
The ASOS at the Twin Falls airport, about 3 miles south of Twin Falls, ID measured a wind speed of 60 mph.
The mesonet TWI3, about 1.3 miles northeast of Kimberly, ID, measured a wind speed of 50 mph.
The ASOS at the Jerome airport, about 3 miles east of Jerome, ID measured a wind speed of 61 mph.
The AWOS at the Gooding airport, about 3 miles west of Gooding, ID measured a wind speed of 61 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2023Every state in 2023This day in weather historyWarnings in Idaho, November 2023
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: 1145946, 1145947, 1145948, 1145949.