A winter storm moved through Southeast Idaho on the 26th through 27th leaving 4 to 6 inches of snow across southern Twin Falls County.
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 winter storm moved through Southeast Idaho on the 26th through 27th leaving 4 to 6 inches of snow across southern Twin Falls County.
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 26, 2:44 PM MST, 16 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
244 PM MST WED DEC 26 2012
.SHORT TERM...TONIGHT THROUGH FRIDAY...A PAIR OF UPPER LEVEL
DISTURBANCES WILL DROP THROUGH SE OREGON AND SW IDAHO THROUGH
THURSDAY. THIS WILL RESULT IN PERIODS OF LIGHT TO MODERATE SNOW
WHICH WILL BE TAPERING OFF TO SNOW SHOWERS FROM THE NW THURSDAY.
THE FIRST IMPULSE WILL BE OVER SW IDAHO THROUGH THE EVENING. THE
SECOND IMPULSE IS OVER NW WA THIS AFTERNOON AND WILL CROSS THROUGH
SOUTH CENTRAL IDAHO LATE TONIGHT AND EARLY THURSDAY MORNING. THE
HIGHEST QPF/SNOW AMOUNTS ARE EXPECTED WHERE NORTH WINDS ENHANCE
UPSLOPE...THE OWYHEE MOUNTAINS AND HIGHER TERRAIN SOUTH OF THE
SNAKE RIVER INCLUDING THE SOUTHWEST HIGHLANDS AND SOUTHERN TWIN
FALLS COUNTY. ACROSS THE MAGIC VALLEY LIGHT TO MODERATE AMOUNTS AT
TIMES THROUGH THURSDAY MORNING...ALONG WITH TEMPERATURES REMAINING
BELOW FREEZING...WILL KEEP WINTRY CONDITIONS GOING FOR THIS
AFTERNOON/S AND EARLY THURSDAY MORNING/S COMMUTES. SO WILL EXPAND
THE WINTER WEATHER ADVISORY WESTWARD MAINLY FOR THE SECOND IMPULSE
AND EXTEND THE MAGIC VALLEYS HEADLINE FOR SNOW LATE TODAY AND
AGAIN VERY EARLY THURSDAY. MUCH COLDER LOWS ARE STILL ON TRACK FOR
THURSDAY NIGHT AS THE SECOND SYSTEM EXITS AND LOCALLY BREEZY WINDS
THURSDAY AFTERNOON ABATE. COOL BUT MOSTLY DRY NORTH FLOW FRIDAY
WILL KEEP HIGHS NEAR TO BELOW SEASONAL NORMS AND MOISTURE LIMITED
TO CLOUDS MAINLY IN THE MORNING AS SKIES CLEAR WITH AN APPROACHING
RIDGE. ONE EXCEPTION COULD BE LINGERING STRATUS UNDER A RIDGE BUT
FOR NOW FORECAST SOUNDINGS BREAK US OUT AROUND 21Z/2 PM MST.
.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...UPPER LEVEL RIDGING
OVER THE AREA FRIDAY NIGHT WILL GIVE WAY TO AN INCOMING PACIFIC
STORM OVER THE WEEKEND. THIS INCOMING TROUGH LOOKS TO SPLIT AROUND
THE INTERMOUNTAIN WEST...THOUGH THE EXTENDED MODELS DIFFER GREATLY
ON THE DEGREE OF SPLITTING. ANY PRECIPITATION WITH THIS SYSTEM
WILL BE LIGHT AND SNOW AT ALL LOCATIONS...WITH THE HIGHER TERRAIN
BEING FAVORED. BY MONDAY A POSITIVELY TILTED RIDGE OF HIGH
PRESSURE WILL BUILD IN OVER THE AREA...A RIDGE OF GREATER
AMPLITUDE THAN WE HAVE SEEN IN QUITE SOME TIME. CLEARING SKIES
COMBINED WITH SNOW COVER AT THE SURFACE AND LIGHT WINDS COULD
CREATE VALLEY INVERSIONS FOR THE MIDDLE OF NEXT WEEK. TEMPERATURES
LOOK TO BE AT OR BELOW NORMAL VALUES THROUGH THE PERIOD.
&&
.AVIATION...WIDESPREAD LOW VFR/MVFR CEILINGS AND MOUNTAIN
OBSCURATION...AND AREAS OF LIGHT SNOW WITH LOCAL MVFR
VISIBILITIES WILL CONTINUE TODAY. PRECIPITATION WILL TAPER OFF
LATE TONIGHT FROM THE WEST...BUT EXPECT AREAS OF MVFR STRATUS
TO PERSIST AND PATCHES OF IFR VALLEY FOG TO DEVELOP AFTER 06Z.
SURFACE WINDS...MAINLY WEST 5-10 KTS. LIGHT AND VARIABLE WINDS
ALOFT...BECOMING NNW AFTER 00Z UP TO 20 KTS AT 10K FEET
MSL.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...WINTER WEATHER ADVISORY UNTIL 11 AM MST THURSDAY IDZ016-030.
WINTER WEATHER ADVISORY UNTIL 11 AM MST THURSDAY IDZ015-029.
OR...NONE.
&&
WEATHER.GOV/BOISE
SHORT TERM...VM
LONG TERM....CB/WH
AVIATION.....CBHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 1111 AM MST WED DEC 26 2012 IDZ016-030-271815- WESTERN MAGIC VALLEY-SOUTHERN TWIN FALLS COUNTY- 1111 AM MST WED DEC 26 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO. .DAY ONE...THIS AFTERNOON AND TONIGHT PERIODS OF LIGHT SNOW WILL BRING WINTER DRIVING CONDITIONS TO SOUTH CENTRAL IDAHO INTO THIS EVENING. EXPECT NEW SNOW AMOUNTS RANGING FROM ONE TO THREE INCHES ACROSS THE WESTERN MAGIC VALLEY AND SOUTHERN TWIN FALLS COUNTY THROUGH MIDNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY DECREASING SNOW SHOWERS THURSDAY WITH HIGH TEMPERATURES BARELY ABOVE FREEZING WILL LIMIT SNOW MELT. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. IDZ012-014-015-029-ORZ061-063-064-271815- LOWER TREASURE VALLEY ID-UPPER TREASURE VALLEY- SOUTHWEST HIGHLANDS-OWYHEE MOUNTAINS-HARNEY COUNTY-MALHEUR COUNTY- LOWER TREASURE VALLEY OR- 1111 AM MST WED DEC 26 2012 /1011 AM PST WED DEC 26 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IDAHO AND SOUTHEAST OREGON. .DAY ONE...THIS AFTERNOON AND TONIGHT SNOW SHOWERS WILL DECREASE OVER SOUTHEAST OREGON THIS AFTERNOON AND FAR SOUTH WEST IDAHO BY EVENING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY DRIER BUT SEASONABLY COLD WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. IDZ011-013-028-033-ORZ062-271815- WEST CENTRAL MOUNTAINS-BOISE MOUNTAINS-CAMAS PRAIRIE- UPPER WEISER RIVER-BAKER COUNTY- 1111 AM MST WED DEC 26 2012 /1011 AM PST WED DEC 26 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IDAHO...WEST CENTRAL IDAHO AND NORTHEAST OREGON. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
952 AM MST WED DEC 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM SNOW 6 NNW CALDWELL 43.74N 116.72W
12/26/2012 M1.0 INCH CANYON ID NWS EMPLOYEE
LAST 24 HOURS.
&&
JSMITHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
1125 AM MST WED DEC 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM SNOW BASQUE STATION 42.41N 117.86W
12/26/2012 E1.0 INCH MALHEUR OR DEPT OF HIGHWAYS
BLOWING AND DRIFT SNOW.
0600 AM SNOW JORDAN VALLEY 42.98N 117.05W
12/26/2012 E1.0 INCH MALHEUR OR DEPT OF HIGHWAYS
BLOWING AND DRIFTING SNOW.
0700 AM SNOW 5 S MERIDIAN 43.54N 116.40W
12/26/2012 E0.2 INCH ADA ID NWS EMPLOYEE
LAST 24 HOURS.
0700 AM SNOW 6 SW BOISE 43.55N 116.31W
12/26/2012 M0.3 INCH ADA ID COCORAHS
LAST 24 HOURS.
0700 AM SNOW EMMETT 43.87N 116.49W
12/26/2012 M0.3 INCH GEM ID CO-OP OBSERVER
LAST 24 HOURS.
0700 AM SNOW 5 NE BOISE 43.66N 116.16W
12/26/2012 M0.1 INCH ADA ID COCORAHS
LAST 24 HOURS.
0730 AM SNOW ENE MIDDLETON 43.71N 116.62W
12/26/2012 M0.8 INCH CANYON ID COCORAHS
LAST 24 HOURS.
0800 AM SNOW 2 NNE BOISE 43.63N 116.21W
12/26/2012 M0.0 INCH ADA ID COCORAHS
LAST 24 HOURS.
0800 AM SNOW 7 N BOISE 43.71N 116.23W
12/26/2012 M0.2 INCH ADA ID CO-OP OBSERVER
LAST 24 HOURS.
0800 AM SNOW OWYHEE DAM 43.64N 117.24W
12/26/2012 M2.0 INCH MALHEUR OR CO-OP OBSERVER
LAST 24 HOURS.
0800 AM SNOW PARMA 43.79N 116.94W
12/26/2012 E0.3 INCH CANYON ID UNKNOWN
ESTIMATED FROM WEB CAM LAST 24 HOURS.
0800 AM SNOW 9 SSE MCCALL 44.79N 116.04W
12/26/2012 M0.5 INCH VALLEY ID COCORAHS
LAST 24 HOURS.
0800 AM SNOW 2 N MERIDIAN 43.64N 116.40W
12/26/2012 E1.0 INCH ADA ID UNKNOWN
PUBLIC REPORT.
0800 AM SNOW 8 NNW BOISE 43.71N 116.29W
12/26/2012 M0.1 INCH ADA ID COCORAHS
LAST 24 HOURS.
0830 AM SNOW 5 WSW BOISE 43.58N 116.31W
12/26/2012 M0.3 INCH ADA ID NWS EMPLOYEE
LAST 24 HOURS.
0830 AM SNOW 16 SSE JORDAN VALLEY 42.76N 116.93W
12/26/2012 M2.0 INCH OWYHEE ID MESONET
SOUTH MOUNTAIN SNOTEL AT 6340 FEET. LAST 24 HOURS.
0830 AM SNOW 35 NW BURNS 43.94N 119.56W
12/26/2012 M3.0 INCH HARNEY OR MESONET
SNOW MOUNTAIN SNOTEL AT 6220 FEET. LAST 24 HOURS.
0830 AM SNOW 5 WNW ANTLERS FOREST SE 44.67N 118.37W
12/26/2012 M4.0 INCH BAKER OR MESONET
TIPTON SNOTEL AT 5400 FEET. LAST 24 HOURS
0830 AM SNOW 16 N ANDREWS 42.70N 118.62W
12/26/2012 M8.0 INCH HARNEY OR MESONET
FISH CREEK SNOTEL AT 7900 FEET. LAST 24 HOURS.
0830 AM SNOW 5 NW BOISE 43.65N 116.30W
12/26/2012 E0.4 INCH ADA ID UNKNOWN
PUBLIC REPORT.
0840 AM SNOW 4 WSW TWIN FALLS 42.54N 114.54W
12/26/2012 M2.3 INCH TWIN FALLS ID COCORAHS
LAST 24 HOURS.
0900 AM SNOW 10 N COUNCIL 44.87N 116.43W
12/26/2012 M0.8 INCH ADAMS ID TRAINED SPOTTER
LAST 24 HOURS.
0904 AM SNOW 2 NNW TWIN FALLS 42.59N 114.48W
12/26/2012 E1.0 INCH TWIN FALLS ID UNKNOWN
CANYON RIDGE HIGH SCHOOL
0921 AM SNOW KIMBERLY 42.53N 114.36W
12/26/2012 E1.0 INCH TWIN FALLS ID UNKNOWN
PUBLIC REPORT. STILL SNOWING.
0930 AM SNOW 4 SSW BOISE 43.55N 116.26W
12/26/2012 E0.5 INCH ADA ID UNKNOWN
PUBLIC REPORT.
0930 AM SNOW 2 S MAGIC VALLEY REGION 42.46N 114.49W
12/26/2012 M1.0 INCH TWIN FALLS ID OTHER FEDERAL
MAGIC VALLEY REGIONAL AIRPORT REPORTING AN INCH OF SNOW
SINCE 9 PM 12/25.
0945 AM SNOW 3 SW MAGIC VALLEY REGIO 42.45N 114.53W
12/26/2012 E0.5 INCH TWIN FALLS ID UNKNOWN
PUBLIC REPORT. OVERNIGHT TOTAL. STILL SNOWING.
0945 AM SNOW JEROME 42.73N 114.52W
12/26/2012 E1.0 INCH JEROME ID UNKNOWN
PUBLIC REPORT.
0945 AM SNOW ENE JEROME 42.73N 114.51W
12/26/2012 E1.5 INCH JEROME ID UNKNOWN
PUBLIC REPORT.
0945 AM SNOW 1 W TWIN FALLS 42.56N 114.48W
12/26/2012 E3.0 INCH TWIN FALLS ID UNKNOWN
PUBLIC REPORT. 2 TO 3 INCHES AND STILL SNOWING.
0945 AM SNOW HAZELTON 42.59N 114.13W
12/26/2012 E1.0 INCH JEROME ID UNKNOWN
PUBLIC REPORT. OVER AN INCH AND STILL SNOWING.
0951 AM HEAVY SNOW 1 NW LAWEN 43.46N 118.81W
12/26/2012 M5.0 INCH HARNEY OR TRAINED SPOTTER
FROM 8 A.M. DEC. 25 TO 8 A.M. DEC.26 FIVE INCHES OF SNOW.
AS OF THIS EXACT TIME A VERY VERY FINE SNOW IS FALLING.
1016 AM SNOW BUHL 42.60N 114.76W
12/26/2012 E2.0 INCH TWIN FALLS ID UNKNOWN
PUBLIC REPORT. STILL SNOWING.
1035 AM SNOW 4 SW BOISE 43.56N 116.27W
12/26/2012 E1.0 INCH ADA ID UNKNOWN
PUBLIC REPORT.
1108 AM SNOW 2 NE TWIN FALLS 42.58N 114.44W
12/26/2012 E2.0 INCH TWIN FALLS ID UNKNOWN
PUBLIC REPORT.
1113 AM SNOW VALE 43.98N 117.24W
12/26/2012 E2.0 INCH MALHEUR OR UNKNOWN
PUBLIC REPORT. STILL SNOWING.
0900 AM SNOW SSW YELLOW PINE 44.90N 115.48W
12/26/2012 M0.0 INCH VALLEY ID COCORAHS
LAST 24 HOURS..
&&
JSMITHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
1217 PM MST WED DEC 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM SNOW KUNA 43.49N 116.42W
12/26/2012 E0.8 INCH ADA ID NWS EMPLOYEE
LAST 24 HOURS.
0900 AM HEAVY SNOW ESE UNITY DAM 44.50N 118.18W
12/26/2012 M4.5 INCH BAKER OR COCORAHS
LAST 24 HOURS.
0900 AM SNOW 2 NW GARDEN VALLEY 44.12N 115.99W
12/26/2012 M0.2 INCH BOISE ID COCORAHS
LAST 24 HOURS.
&&
JSMITHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
234 PM MST WED DEC 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY SNOW DREWSEY 43.80N 118.38W
12/26/2012 M8.0 INCH HARNEY OR CO-OP OBSERVER
TOTAL SNOWFALL ENDING 700 AM PST.
0100 PM SNOW MCCALL 44.91N 116.11W
12/26/2012 M1.5 INCH VALLEY ID CO-OP OBSERVER
TOTAL SNOWFALL ENDING 100 PM MST.
0105 PM SNOW MCCALL 44.91N 116.11W
12/26/2012 E1.0 INCH VALLEY ID UNKNOWN
PUBLIC REPORT.
0202 PM SNOW 2 NW MERIDIAN 43.63N 116.43W
12/26/2012 M0.4 INCH ADA ID TRAINED SPOTTER
LAST 24 HOURS.
&&
JSMITHPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
236 PM MST WED DEC 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0230 PM SNOW KUNA 43.49N 116.42W
12/26/2012 E1.5 INCH ADA ID NWS EMPLOYEE
LAST 24 HOURS.
&&
JSMITHThe national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
The Twin Falls Sheriff's office reported 4 to 6 inches of snow fell around Rogerson and along U. S. Highway 93 to the Nevada border.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2012Every state in 2012This day in weather historyWarnings in Idaho, December 2012
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: 422742.