A warm front moving through the Great Basin spread snow and pockets of freezing rain across parts of Southwest Idaho and Southeast Oregon making roads slick and hazardous. Numerous accidents were reported including 3 fatalities.
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.
A warm front moving through the Great Basin spread snow and pockets of freezing rain across parts of Southwest Idaho and Southeast Oregon making roads slick and hazardous. Numerous accidents were reported including 3 fatalities.
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 Dec 1, 2:44 PM MST, 3 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 244 PM MST MON DEC 1 2014 .SHORT TERM...MOISTURE ALONG A WARM FRONT BROUGHT A PERIOD OF LIGHT SNOW TODAY TO SERN OREGON AND SWRN IDAHO...INCLUDING THE TREASURE VALLEY. AT 1 PM MST THE FRONT AND MOST OF THE SNOW WERE NORTH OF THE SNAKE BASIN AND WILL REMAIN THERE THROUGH THIS EVENING. THE LOWER TREASURE VALLEY HAS STAYED BELOW FREEZING ALL DAY AND SNOW OR SLUSH HAVE PARTIALLY COVERED THE ROADS. IN THE UPPER TREASURE VALLEY AFTERNOON TEMPS HAVE RANGED FROM NEAR 32 AT BOISE TO NEAR 40 AT MOUNTAIN HOME. IN THE UPPER WEISER RIVER AREA AND THE WEST CENTRAL IDAHO MOUNTAINS A WINTER WEATHER ADVISORY WILL CONTINUE UNTIL 06Z TONIGHT FOR A MODERATE SNOWFALL. SOUTH OF THE WARM FRONT TEMPERATURES TONIGHT WILL DROP ONLY A DEGREE OR TWO FROM THIS AFTERNOON/S HIGHS AND THEN RISE INTO THE 40S TUESDAY. MOIST AIR NEAR THE SURFACE WILL PRODUCE PATCHY FOG IN THE VALLEYS LATE TONIGHT AND TUESDAY MORNING. ON TUESDAY THE FRONTAL ZONE IN OUR NRN CWA WILL DISSIPATE AND PCPN WILL END. A NEW SURGE OF MOISTURE WILL COME IN FROM THE SOUTHWEST FROM A STORM OFF CALIFORNIA LATE TUESDAY NIGHT THROUGH WEDNESDAY. THIS STORM WILL BE WARMER WITH SNOW LEVEL RISING TO 5200 FEET MSL NORTH TO 6200 FEET MSL SOUTH...ABOVE MOST ROADS AND PASSES. BUT SHALLOW SUB-FREEZING AIR IN THE VALLEYS WILL BRING ANOTHER CHANCE OF LIGHT FREEZING RAIN ESPECIALLY WEDNESDAY MORNING. THIS COULD CREATE TRAVEL PROBLEMS BUT IT IS TOO EARLY TO ISSUE AN ADVISORY JUST YET. .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...WEDNESDAY NIGHT THROUGH THURSDAY NIGHT VERY MOIST W OR SW FLOW ALOFT WILL SPREAD OVER SE OREGON AND SW IDAHO. SNOW LEVELS STILL LOOK HIGH /ABOVE 5500- 6500 FT/ WITH THE MID-WEEK STORM...SO ONLY BACKCOUNTRY SIGNIFICANT SNOWS ARE EXPECTED. FRIDAY THE MOISTURE IS EXPECTED TO LIFT NORTH OF THE IDAHO SNAKE RIVER PLAIN DUE TO SW TO W FLOW. MOISTURE WILL THEN BECOME MORE LIMITED DUE TO SPLIT WEST UPPER LEVEL FLOW SATURDAY. POPS WILL BE LOWER THAN NORMAL SATURDAY THROUGH MONDAY. MODELS TRENDED STRONGER WITH THE RIDGE SATURDAY NIGHT AND TRENDED SLOWER AND WEAKER WITH THE NEXT UPPER LEVEL TROUGH. THE OLD TROUGH NOW FLATTENS OUT MONDAY AS IT ENCOUNTERS AND OVERRIDES THE LONG WAVE WESTERN U.S. RIDGE ACROSS THE WESTERN U.S. THIS PATTERN FAVORS TEMPERATURES AVERAGING 5 DEGREES ABOVE NORMAL IN THE LONG TERM. && .AVIATION...FROM SOUTH OF KBKE TO NORTH OF KBOI-KJER AREAS OF IFR SNOW WITH A QUASI-STATIONARY FRONT. POCKETS OF MVFR CIG AND LIGHT MIXED PRECIP ELSEWHERE ACROSS SE OREGON AND SW IDAHO. SNOW LEVEL NEAR THE SURFACE EXCEPT SOUTH OF A KBNO-KTWF LINE 6-7K FT MSL THROUGH TUESDAY. KMYL AND CENTRAL MOUNTAINS IFR SNOW THROUGH 18Z TUESDAY. SURFACE WINDS EAST TO SOUTH 5-15 KTS THIS AFTERNOON BECOMING NE-NW 5-15 KTS TONIGHT AND TUESDAY. WINDS ALOFT NEAR 10K FEET MSL...W 30-40KTS TONIGHT AND DECREASING FROM NW 15 KTS TO S 10KTS LATE TUESDAY. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...WINTER WEATHER ADVISORY UNTIL 11 PM MST THIS EVENING IDZ011-033. OR...NONE. && WEATHER.GOV/BOISE SHORT TERM...LC LONG TERM....VM/DD AVIATION.....VM
The national radar mosaic for the moment the first event began.
1 winter weather. Local standard time, as filed.
According to Oregon State Police, the driver of a semi-truck lost control of the vehicle and went over an embankment into a guard rail on Interstate 84 at mile marker 342 near Lime, Oregon. The driver was pronounced dead at the scene of the accident.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2014Every state in 2014This day in weather historyWarnings in Oregon, December 2014
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: 552152.