An ice storm moved across central Indiana on December 9th. The area's that received the most ice accumulation were Boone and Tippecanoe Counties.
Every event with a place to put it; 2 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 IND wrote it up.
An ice storm moved across central Indiana on December 9th. The area's that received the most ice accumulation were Boone and Tippecanoe Counties.
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 Indianapolis, IN wrote its last area forecast discussion before the first event at Dec 9, 5:45 AM EST, 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 545 AM EST SUN DEC 9 2007 .AVIATION...DISCUSSION FOR 091200Z TAF ISSUANCE. ORGANIZED LIFT FM THE NEXT IN A SERIES OF DISTURBANCES XPCTD TO SPREAD PCPN NEWD OVR THE TAF SITES IN THE NEXT COUPLE OF HRS. THIS AREA OF LIFT SHOULD MOV NWD...THEN PIVOT OFF TO THE E BY LT AFT AS WV PASSES THRU THE OH VLY. AT THIS PT...CRITICAL THICKNESSES SUGGEST PCPN SHOULD BE ALL LIQUID. THE KIND/KHUF/KBMG TERMINALS LOOK TO STAY ABV FREEZING FOR THE MOST PART...SO LTL THREAT OF FREEZING PCPN IN THOSE AREAS...BUT APPEARS THE KLAF TERMINAL WL PROB SEE FREEZING RAIN UNTIL THE LT MORN HRS. LAST EVENING/S UA AND MODELS SUGGEST QUITE A BIT OF INSTABILITY ALOFT TDY...SO THERE IS A THREAT FOR EMBEDDED CONVECTION...BUT THE CHANCES OF A DIRECT IMPACT TO THE TERMINALS TOO LOW TO INCLUDE IN TAFS AT THIS PT. MOIST AMS OVER RUNNING A VRY SHALLOW BOUNDARY SUGGEST WIDESPREAD LIFR/AREAS VLIFR CONDS ALREADY DVLPG SHOULD CONT TO DVLP AND SPREAD NWD THIS MORN...ESPECIALLY IN THE WAKE OF INITIAL PCPN SURGE. IMPROVMENT IN CONDS NOT XPCTD TIL AFT 100000Z WHEN SFC WV MOVES E OF THE STATE. && .DISCUSSION...LOW PRES WAS FOUND OVR WRN ARKANSAS EARLY THIS MORNING AND A WARM FRONT EXTENDED NORTHEASTWARD ACRS KY. RECENT RADAR TRENDS SHOW SCT SHRA DEVELOPING AHEAD OF THE WARM FRONT ACRS NRN KY...SRN IL AND SRN INDIANA. SFC FLOW ACRS INDIANA REMAINED FROM THE COOL NE AND ALL OF THE FA WAS ABOVE FREEZING EXPECT FOR THE ONGOING ADVISORY AREA. H20 VAPOR IMAGERY SHOWS TROPICAL MOISTURE PUSHING ACRS TX INTO THE MISSISSIPPI AND OHIO RVR VALLEYS. MAIN FORECAST CHALLENGE TDY WL BE POPS AND PCPN TYPE. MODELS ARE IN PRETTY GOOD AGREEMENT IN THE SHORT TERM. THERE ARE SOME TIMING DIFFERENCES BY THE TIME MONDAY NIGHT/S SYSTEM ARRIVES...AND WL USE A BLEND. ATTM...ONGOING FCST APPEARS ON TRACK AS RA IS DEVELOPING ACRS THE SRN PART OF THE FA AHEAD OF THE WARM FRONT. NAM 295K ISENTROPIC SFC CONTINUES TO SHOW GOOD UPGLIDE THIS MORNING WITH SATURATED LOWER LVLS. SPECIFIC HUMIDITIES ARE AROUND 8 G/KG ACRS THE FA. DECENT FRONTOGENESIS FOUND ACRS THE FA TDY. TIME SECTIONS ACRS THE FA INDICATE GOOD VV WITH NEARLY OMEGA NEAR 8 UBAR/S AT 18Z...ESSENTIALLY AS THE WEAK SFC LOW RIDES NORTHEAST ALONG THE WARM FRONT NEAR THE OHIO RIVER. HENCE THE CATEGORICAL POPS LOOK GOOD. NAM12 SFC TEMPS SUGGEST THE ENTIRE FA SHOULD BE ABOVE 32F BY 18Z AND FZRA THREAT SHOULD END AT THAT TIME. WL LEAVE THE ONGOING ADVISORY IN PLACE...HOWEVER WE WILL NEED TO WATCH CLOSELY FOR POSSIBILITY OF HEAVIER FZRA THIS MORNING AND UPGRADE TO ICE STORM WARNING IF NECESSARY. AS TEMPS ARE ALREADY BEHIND THE EXPECTED MAVMOS 3 HOURLIES AND PCPN IS EXPECTED TDY...WL LEAN TO THE COOLER SIDE OF MAVMOS BY ABOUT 3-4 DEGREES. LOWER LVLS OF THE ATMOS REMAIN SATURATED TONIGHT AS WINDS BECOME NW OVERNIGHT AS THE DEPARTING LOW PULLS COLDER AIR INTO THE FA AND WARM FRONT SAGS SOUTHWARD AS A CD FRONT. UPPER SUPPORT AND DYNAMICS APPEAR RATHER LIMITED TONIGHT...HOWEVER IT WITH SATURATED LOWER LVLS AND THE CD FRONT STILL LINGERING IN THE AREA...WE WILL STILL NEED TO KEEP SOME POPS FOR SOME VERY LIGHT PCPN AMOUNTS. SFC TEMPS ACRS THE NRN FA SUGGEST FZRA OR FZDZ RETURNING...ALTHOUGH ANY AMOUNTS WL BE RATHER LIGHT. WL HOLD OFF AN ANY ADVISORIES FOR NOW...UNTIL OUR CURRENT ADVISORY ENDS. WL USE A BLEND OF THE MAVMOS AND METMOS FOR LOWS. MODELS BEGIN TO DIFFER ON MONDAY AS THE DRIES THINGS OUT AND THE GFS WISHES TO RETURN MOISTURE FROM THE SW MORE QUICKLY. ADDING FOR THE AGRUEMENT FOR PCPN IS THAT THE ONGOING UPPER PATTERN OF TROPICAL MOISTURE ARRIVING FROM THE SW REMAINS IN PLACE WITH THE SLOWLY SHIFTING SFC BOUNDARY IN OUR VICINITY. FOR NOW WL CONTINUE TO KEEP CHC POPS IN THE FORECAST FOR MONDAY...BUT PCPN SHOULD BE LIMITED TO THE LATTER PART OF THE DAY AS THE WARM FRONT APPROACHES FROM THE SOUTH AND THE WEAK UPPER RIDGE DEPARTS. WITH CLOUDS EXPECTED AND PCPN POSSIBILITIES ALONG WITH NORTH OR NE SFC FLOW WL GO ABOUT 3 DEGREES COLDER THAN MAVMOS FOR HIGHS. OUR NEXT SYS ARRIVES ON MONDAY NIGHT AS THE PREVIOUSLY STATED WARM FRONT PUSHES NORTHWARD. MODELS DIFFER A BIT RIGHT NOW WHEN IT COMES TO PCPN AMOUNTS...BUT ATTM LWR LVL Q VECTOR CONVERGENCE LOOKS IMPRESSIVE. FORTUNATELY FOR NOW PCPN TYPE APPEARS TO BE RA AND SFC TEMPS REMAIN ABOVE FREEZING. WL STICK CLOSER TO THE GFS HERE AS IT TYPICALLY WL PICK UP ON SYSTEMS BEFORE THE NAM. FOR NOW WL STICK CLOSE TO MAVMOS FOR LOWS. AGAIN GIVEN CLOUDS...EXPECTED PCPN AND WINDS BECOMING NW WL LEAN TO THE COLDER SIDE OF HIGHS FOR TUESDAY. BARRING COLLABORATION WL TRY AND STICK CLOSE TO MAVMOS POPS AS WELL...GIVEN THE STRONG THAT CONTINUES TO LAY ACRS SRN INDIANA AND THE AREA OF LOW PRES EXPECTED TO PUSH ALONG IT DURING THE COURSE OF THE DAY. FOR THE MOMENT...NO CHANGES TO THE ONGOING FCST AFT TUESDAY. && .IND WATCHES/WARNINGS/ADVISORIES...FZRA ADVISORY SUN 02Z-17Z ALONG AND NORTH OF A WINCHESTER-MUNCIE-NOBLESVILLE-CRAWFORDSVILLE-CLINTON LINE. && PUBLIC...PUMA AVIATION...JAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 507 AM EST SUN DEC 9 2007 INZ021-028>031-035>044-101015- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE- 507 AM EST SUN DEC 9 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. A FREEZING RAIN ADVISORY IS IN EFFECT UNTIL NOON. FREEZING RAIN IS EXPECTED TO RESULT IN LIGHT ICING. ICE ACCUMULATIONS ARE EXPECTED TO BE LESS THAN ONE QUARTER OF AN INCH. THERE IS A CHANCE FOR LIGHT FREEZING DRIZZLE OR LIGHT FREEZING RAIN TONIGHT ALSO. ISOLATED THUNDERSTORMS MAY PRODUCE LIGHTNING TODAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A CHANCE FOR FREEZING RAIN AND FREEZING DRIZZLE ON MONDAY MORNING. SNOW IS POSSIBLE WEDNESDAY NIGHT AND THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF ICE ARE ENCOURAGED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ045>049-051>057-060-101015- PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN- JOHNSON-SHELBY-RUSH-SULLIVAN- 507 AM EST SUN DEC 9 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. ISOLATED THUNDERSTORMS MAY PRODUCE LIGHTNING TODAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. SNOW IS POSSIBLE ON WEDNESDAY NIGHT AND THURSDAY. .SPOTTER INFORMATION STATEMENT... REPORTS OF ANY ICE ACCUMULATIONS ARE ENCOURAGED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ061>065-067>072-101015- GREENE-MONROE-BROWN-BARTHOLOMEW-DECATUR-KNOX-DAVIESS-MARTIN- LAWRENCE-JACKSON-JENNINGS- 507 AM EST SUN DEC 9 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. ISOLATED THUNDERSTORMS MAY PRODUCE LIGHTNING TODAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. LIGHT SNOW IS POSSIBLE WEDNESDAY NIGHT AND THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) PUMA
The national radar mosaic for the moment the first event began.
2 ice storm. Local standard time, as filed.
Broadcast media in Lafayette reported a quarter of an inch of ice on trees and power lines.
A COCORAHS observer twelve miles northeast of Lebanon reported a quarter of an inch of ice accumulation.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2007Every state in 2007This day in weather historyWarnings in Indiana, December 2007
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: 70412, 70414.