A deep upper level low pressure center crossed over northern Ohio early on Friday, January 13th. Widespread light snow with some narrow bands of moderate snow fell in the Whitewater valley.
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 ILN wrote it up.
A deep upper level low pressure center crossed over northern Ohio early on Friday, January 13th. Widespread light snow with some narrow bands of moderate snow fell in the Whitewater valley.
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 Wilmington, OH wrote its last area forecast discussion before the first event at Jan 12, 7:59 PM EST, 4 hours 1 minute earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
759 PM EST THU JAN 12 2012
.SYNOPSIS...
LOW PRESSURE OVER THE GREAT LAKES WILL SLOWLY MOVE OFF TO THE
NORTHEAST TONIGHT AND FRIDAY. HIGH PRESSURE WILL BRIEFLY BUILD IN
FRIDAY NIGHT AND SATURDAY MORNING. A CLIPPER WILL DROP ACROSS THE
AREA LATE SATURDAY AND SATURDAY NIGHT.
&&
.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
WIDESPREAD SNOW SHOWERS ASSOCIATED WITH AN EMBEDDED SHORTWAVE ARE
SPREADING ACROSS THE EASTERN HALF OF THE FORECAST AREA. ADDITIONAL
SNOW SHOWERS HAVE ALSO DEVELOPED ACROSS SOUTHERN INDIANA AND HAVE
ALREADY SPREAD ACROSS THE I-75 CORRIDOR MAINLY SOUTH OF DAYTON.
THE MORE WIDESPREAD LIGHT SNOW ASSOCIATED WITH THE SHORTWAVE WILL
LIFT OUT OF THE EASTERN ZONES BY MIDNIGHT. THIS WILL LEAVE THE
FORECAST WITH JUST AREAS OF FLURRIES FROM MIDNIGHT UNTIL AROUND
3AM. LATEST FORECAST UPDATE LOWERS OVERNIGHT TEMPERATURES BY A
COUPLE OF DEGREES...AS CURRENT TRENDS SUGGEST THAT COLD ADVECTION
IS OCCURRING FASTER THAN PREVIOUSLY THOUGHT.
AS THE UPPER LOW MOVES ACROSS THE AREA LATE TONIGHT WRAP AROUND
SNOW WILL AFFECT THE FORECAST AREA. GREATEST ACCUMULATIONS SHOULD
BE ACROSS THE NORTHERN COUNTIES. WINDS WILL BE GUSTY WHICH WILL
CAUSE SNOW ON THE GROUND TO BLOW AND MAY COVER PREVIOUSLY TREATED
ROADWAYS.
&&
.SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/...
WRAP AROUND SNOW WILL STILL BE MOVING ACROSS THE REGION AT THE
BEGINNING OF THE PERIOD BUT THEN DIMINISH THROUGH THE DAY WITH
ONLY A LITTLE LINGERING ACTIVITY IN THE FAR NORTH FOR FRIDAY
EVENING. EXPECT TOTAL ACCUMULATIONS TO BE AT OR BELOW ADVISORY
CRITERIA. BUT WITH POTENTIAL IMPACTS HAVE FILLED IN THE REST OF
THE AREA THROUGH NOON.
A SURFACE RIDGE WILL SLIDE ACROSS THE REGION FRIDAY NIGHT AND
SATURDAY MORNING. THEN A CLIPPER WILL DROP SOUTHEAST ACROSS THE
REGION LATE SATURDAY AFTERNOON INTO SATURDAY NIGHT. AT THIS POINT
HAVE KEPT POPS IN THE CHANCE CATEGORY WITH THIS SYSTEM.
FORECAST TEMPERATURES USED A MOS BLEND FOR THE MOST PART.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS ACROSS THE AREA ON
SUNDAY AND INTO SUNDAY NIGHT. STRONG SOUTHERLY FLOW ON MONDAY WILL
ALLOW TEMPERATURES TO RISE UP INTO THE 40S. A STORM SYSTEM WILL
BEGIN TO BRING RAIN TO THE AREA ON MONDAY WITH RAIN BECOMING MORE
WIDESPREAD MONDAY NIGHT. WITH SOUTHERLY FLOW CONTINUING ACROSS THE
FA MONDAY NIGHT TEMPERATURES WILL REMAIN ABOVE FREEZING. A COLD
FRONT WILL MOVE THROUGH DURING THE DAY ON TUESDAY AND TEMPERATURES
WILL DROP ACROSS THE REGION DURING THE AFTERNOON HOURS. AS COLDER
AIR WORKS INTO THE FA RAIN WILL TRANSITION TO SNOW. SNOW WILL TAPER
OFF DURING THE OVERNIGHT HOURS TUESDAY NIGHT. WITH COOLER AIR MASS
IN PLACE FOR WEDNESDAY HIGH TEMPERATURES WILL ONLY RISE INTO THE
MIDDLE 20S TO AROUND 30 DEGREES. A WEAK DISTURBANCE WILL MOVE
THROUGH THE FA THURSDAY INTO THURSDAY NIGHT WILL ALLOW FOR SOME
LIGHT PRECIPITATION ACROSS THE AREA.
&&
.AVIATION /01Z FRIDAY THROUGH TUESDAY/...
OUR AREA IS CURRENTLY IN BETWEEN THE FRONTAL BAND OF
PRECIPITATION TO OUR NORTHEAST...AND WRAPAROUND SNOW THAT IS
CURRENTLY LOCATED TO OUR WEST. LIGHT SNOW SHOWERS AND FLURRIES
WILL MOVE ACROSS THE TAF SITES OCCASIONALLY OVER THE NEXT SEVERAL
HOURS. MVFR CIGS ARE TRYING TO MOVE INTO OUR AREA FOR NOW.
HOWEVER...WITH COOLER TEMPERATURES MOVING IN AT THE LOW LEVELS AND
SNOW SHOWERS DEVELOPING...MAY SEE CIGS DROP BACK TO IFR AFTER 04Z.
HAVE PUSHED BACK THE TIMING OF THE ARRIVAL OF THE WRAPAROUND SNOW
AROUND THE LOW...AS THAT SNOW IS STILL BACK OVER ILLINOIS AT THIS
HOUR. AFTER 07Z THIS SNOW WILL MOVE INTO OUR AREA...AND WILL
COMBINE WITH BREEZY WESTERLY WINDS TO PRODUCE IFR VSBYS. AT THIS
TIME THE BEST CHANCES FOR THE MOST REDUCED VSBYS WILL BE ACROSS
THE NORTHERN TAF SITES KDAY/KLUK/KCMH.
AFTER SUNRISE FRIDAY...EXPECT SCATTERED TO NUMEROUS SNOW SHOWERS
WITH MVFR/IFR CIGS AND OCCASIONAL MVFR VSBYS. SHOWERS WILL
GRADUALLY TAPER OFF FROM SOUTH TO NORTH DURING THE AFTERNOON.
OUTLOOK...MVFR/IFR CEILINGS AND MVFR/IFR VISIBILITIES POSSIBLE
THROUGH FRIDAY NIGHT.
&&
.ILN WATCHES/WARNINGS/ADVISORIES...
OH...WINTER WEATHER ADVISORY UNTIL NOON EST FRIDAY FOR OHZ026-034-
035-042>046-051>056-060>065-070>074-077>082-088.
KY...WINTER WEATHER ADVISORY UNTIL NOON EST FRIDAY FOR KYZ089>100.
IN...WINTER WEATHER ADVISORY UNTIL NOON EST FRIDAY FOR INZ050-058-
059-066-073>075-080.
&&
SYNOPSIS...
NEAR TERM...LATTO
SHORT TERM...
LONG TERM...NOVAK
AVIATION...LATTOHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 420 PM EST THU JAN 12 2012 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-132130- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO- SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT- PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HARDIN-MERCER-AUGLAIZE-DARKE- SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-MADISON- FRANKLIN OH-LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY- FAIRFIELD-BUTLER-WARREN-CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN- HIGHLAND-ADAMS-PIKE-SCIOTO- 420 PM EST THU JAN 12 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON EST FRIDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...CENTRAL OHIO...MIAMI VALLEY OF OHIO...SOUTH CENTRAL OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. IN ADDITION...WIND CHILL READINGS WILL BE NEAR ZERO FRIDAY NIGHT AND SATURDAY MORNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SNOW AND ICE ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE.
The national radar mosaic for the moment the first event began.
1 winter weather. Local standard time, as filed.
Two inches of snow was reported by a spotter 6 miles north of Holton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2012Every state in 2012This day in weather historyWarnings in Indiana, January 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: 362903.