A line of strong thunderstorms moved east along the I-70 corridor. One of the storms produced an isolated swath of damaging winds as it moved through Callaway County.
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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 LSX wrote it up.
A line of strong thunderstorms moved east along the I-70 corridor. One of the storms produced an isolated swath of damaging winds as it moved through Callaway 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 St. Louis, MO wrote its last area forecast discussion before the first event at Dec 28, 6:08 PM CST, 3 hours 24 minutes earlier.
Area Forecast Discussion...Updated Aviation National Weather Service Saint Louis MO 608 PM CST Sat Dec 28 2019 .SHORT TERM... (Through Late Sunday Night) Issued at 250 PM CST Sat Dec 28 2019 Despite the warm front lifting northward out of forecast area as of 20z, latest RAP/CAMs continue to indicate rather meager MU CAPES, between 100 and 300 J/kg in warm sector. However, they do continue to indicate fairly decent 0 to 1 km bulk shear values between 40 and 55 kts for the late evening through overnight hours, as well as 0- 1km helicity of 200-400, just ahead of prefrontal trough. So there is still a marginal chance of a very narrow line of strong to severe storms, mainly along and south of I-70 between 05z and 10z Sunday. Otherwise, will see increasing chances of showers and some storms late this afternoon through tonight with decent rainfall amounts between half an inch to an inch possible with this round of activity. As for temperatures, they will remain steady or possibly rise a bit overnight tonight. Expect a bit of a break Sunday morning through most of the afternoon hours, before main cold front slides through with another round of showers over portions of southeast MO and southwestern IL. Could see some isolated thunderstorms during this period, but confidence is low so kept mention out for now. Rain will taper off after midnight Sunday night with colder air filtering in. Lows will be in the upper 20s to mid 30s, which despite the colder air, are around 10 degrees above normal for this time of year. Byrd .LONG TERM... (Monday through Next Saturday) Issued at 250 PM CST Sat Dec 28 2019 On Monday, even though weekend system will have exited region, tight pressure gradient will prevail with gusty west winds around 35 mph at times. As for temperatures, despite colder air filtering into the area for the first part of the work week, highs will remain near normal in the upper 30s to mid 40s Monday and Tuesday. By the beginning of 2020, temperatures will moderate somewhat with highs at least 10 degrees above normal and will persist through next weekend. Otherwise, extended models continue to indicate that the next system will approach area by late Wednesday night. Some slight timing, strength and placement differences among the models, so kept slight chance/low chance pops Wednesday night through Friday morning. Byrd && .AVIATION... (For the 00z TAFs through 00z Sunday Evening) Issued at 549 PM CST Sat Dec 28 2019 IFR ceilings and widespread showers will prevail across much of the area through this evening and into the overnight hours. A line of stronger convection which is currently over western Missouri will continue moving east through central and eastern Missouri into Illinois later this evening and through the overnight. This line could produce occasional lightning as well as wind gusts in excess of 30-40kts. Drier low level air will wrap into the storm system Sunday morning and the IFR ceilings are expected to lift to VFR from west to east through the early morning. SPECIFICS FOR KSTL: IFR flight conditions with occasional showers will continue at Lambert this evening. A line of stronger convection currently over western Missouri will move into the vicinity of the terminal around 05Z if it continues to move at its current speed and direction. This line could produce gusty winds in excess of 20-30kts and a few lightning flashes as it passes. IFR ceilings are expected to lift during the morning on Sunday as drier wraps into the storm system from the west. Timing is uncertain, but current indications are that the ceiling will be lifting between 11-13Z. Carney && .PRELIMINARY POINT TEMPS/POPS... Saint Louis 56 63 37 43 / 100 50 50 0 Quincy 52 59 31 38 / 100 20 30 5 Columbia 51 57 31 39 / 100 20 10 0 Jefferson City 51 59 31 41 / 100 20 10 0 Salem 56 64 36 44 / 100 90 80 5 Farmington 55 62 33 44 / 100 60 40 0 && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous Weather Outlook National Weather Service Saint Louis MO 303 PM CST Sat Dec 28 2019 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-291200- Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO- Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO- Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO- Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO- Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL- Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO- Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO- Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO- 303 PM CST Sat Dec 28 2019 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight. There is a chance for thunderstorms through tonight. Isolated strong to severe storms will be possible tonight for areas near and south of Interstate 70, with damaging winds and a brief tornado possible. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight for areas near and south of Interstate 70. Byrd
The St Louis radar (KLSX), 122 km away, was scanning. The volume nearest the first event began at 03:32 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew some siding off of a barn and blew a couple of windows out on a nearby home along County Road 263.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2019Every state in 2019This day in weather historyWarnings in Missouri, December 2019
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: 869046.