An upper low moving slowly across the Northern Great Basin brought snow and cold air to Southeast Oregon and Southeast Idaho.
Every event with a place to put it; 1 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.
An upper low moving slowly across the Northern Great Basin brought snow and cold air to Southeast Oregon and Southeast Idaho.
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 24, 2:23 PM PST, 4 hours 37 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
323 PM MST TUE NOV 24 2015
.SHORT TERM...TONIGHT THROUGH THURSDAY...INCOMING SYSTEM IS
CENTERED OFF THE SOUTHERN OREGON COAST WITH PRECIPITATION
STREAMING OVER SOUTHEAST OREGON AND THE SOUTHWESTERN IDAHO
MOUNTAINS AS OF 3 PM MST TUESDAY. EXPECTING PRECIPITATION TO
SPREAD REGION-WIDE OVERNIGHT AS THE LOW TAKES A MORE EASTERLY
TRACK AND MOVES ACROSS THE NEVADA BORDER. THIS MEANS THAT THE
BRUNT OF THE SYSTEM IS EXPECTED IN THE MORE SOUTHERN ZONES. SNOW
LEVELS CURRENTLY AROUND 4500 TO 5000 FT MSL...WILL BE DROPPING TO
VALLEY FLOORS AROUND SUNRISE...WITH RAIN BECOMING SNOW AT THAT
TIME IN THE TREASURE AND MAGIC VALLEYS...INCLUDING THE BOISE
METRO. GENERALLY ACCUMULATING SNOW ANYWHERE FROM 3 TO 7 INCHES
ACROSS THE REGION...1 TO 2 INCHES IN THE BOISE METRO AND THE BLUE
AND WEST CENTRAL MOUNTAINS...AND 4 TO 6 INCHES IN THE BOISE
MOUNTAINS. LOCALIZED AREAS OF ABOUT A FOOT IN THE HIGHER
ELEVATIONS SOUTH OF THE SNAKE RIVER. PRECIPITATION SET TO TAPER
OFF LATE THURSDAY. WINDS ARE AN ISSUE ACROSS SOUTHEAST OREGON WITH
WINDS 15 TO 20 MPH WITH GUSTS TO 35 MPH TONIGHT AND DROPPING TO
ABOUT 10 MPH LATE WEDNESDAY. LOW TEMPERATURES ABOUT NORMAL
OVERNIGHT...DROPPING TO ABOUT 10 TO 15 BELOW BY THURSDAY. HAVE A
WARNING IN HARNEY COUNTY BEGINNING TONIGHT FOR BLOWING SNOW...AN
ADVISORY IN MALHEUR/OWYHEE/UPPER TREASURE VALLEY FOR SNOW
ACCUMULATIONS...AND A WARNING IN THE WESTERN MAGIC VALLEY/SOUTHERN
TWIN FALLS COUNTY FOR SNOW ACCUMULATION. PLEASE BE AWARE OF THE
POTENTIAL TRAVEL IMPACTS AND SLICK ROADS.
.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY... MODELS STILL REMAIN
IN GENERAL AGREEMENT WITH EACH OTHER BY THE WEEKEND AS THE UPPER LOW
LINGERS ACROSS THE NEVADA BORDER REGION. THIS WILL KEEP LIGHT SNOW
SHOWERS ACROSS THE AREA. THERE IS NO ADVECTION OF MOISTURE INTO THE
LOW...SO WILL JUST BE DEALING WITH LOW PW VALUES ASSOCIATED WITH THE
LOW ITSELF...SO NO SIGNIFICANT ADDITIONAL ACCUMULATIONS EXPECTED.
MODELS HAVE THE UPPER LOW EJECTING EASTWARD FINALLY BY EARLY MONDAY
MORNING. THE UPPER RIDGE OVER WESTERN PORTIONS OF CANADA THAT
DEVELOPS FRIDAY MORNING WEAKENS SLIGHTLY AND SAGS SOUTH TUESDAY. AT
THIS TIME THIS SHOULD SHUNT ANY SYSTEMS INTO SOUTHERN CALIFORNIA.
&&
.AVIATION...CONDITIONS BECOMING IFR ACROSS MOST LOCATION UNDER LOW
CLOUDS AND PRECIP. SNOW LEVELS LOWERING TO 4000 FT BY MIDNIGHT AND
3000 FT BY SUNRISE. SFC LOW OVER NORTHERN NV BY 06Z BRINGING SOUTH
TO SE WINDS AROUND 10 KTS IN ID WITH WINDS SHIFTING N TO NE 15 TO
20 KTS IN EASTERN OREGON. SOUTHWEST WIND 5 TO 15 KTS AT 10KFT
SHIFTING EAST TO NORTHEAST 5 TO 10 KTS OVER IDAHO AND 15 TO 30 KTS
OVER EASTERN OREGON AFTER MIDNIGHT THROUGH WEDNESDAY.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...WINTER STORM WARNING FROM 5 AM WEDNESDAY TO 11 AM MST THURSDAY
IDZ016-030.
WINTER WEATHER ADVISORY FROM 5 AM WEDNESDAY TO 11 AM MST
THURSDAY IDZ014.
WINTER WEATHER ADVISORY FROM 11 PM THIS EVENING TO 11 AM MST
THURSDAY IDZ015-029.
OR...WINTER WEATHER ADVISORY FROM 11 PM MST /10 PM PST/ THIS EVENING
TO 11 AM MST /10 AM PST/ THURSDAY ORZ063.
WINTER STORM WARNING FROM 10 PM THIS EVENING TO 10 AM PST
WEDNESDAY ORZ061.
&&
WEATHER.GOV/BOISE
SHORT TERM...AB
LONG TERM....CR/WH
AVIATION.....CRThe national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
Five inches of snow was reported at Burns, Oregon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2015Every state in 2015This day in weather historyWarnings in Oregon, November 2015
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: 603978.