Storms with heavy rain trained across northeast Missouri during the day and into the evening hours causing flash flooding.
Every event with a place to put it. 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 LSX wrote it up.
Storms with heavy rain trained across northeast Missouri during the day and into the evening hours causing flash flooding.
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 Jul 5, 2:54 PM CST, 2 hours 9 minutes earlier.
Area Forecast Discussion National Weather Service Saint Louis MO 354 PM CDT Wed Jul 5 2017 .SHORT TERM... (Through Late Thursday Afternoon) Issued at 354 PM CDT Wed Jul 5 2017 Stacked system currently centered just northwest of KSGF, will continue to slowly track to the east, finally moving into southwestern Indiana by midday on Thursday. So main issue in the short term is where and when storms/showers will pop up. Still feel best chances will be along and south of Interstate 70 through this evening, then gradually taper off and shift to the east. But with such slow movement of system, will see lingering showers/storms over southeast MO/southern IL through the day on Thursday while rest of forecast area will be dry. Because of clouds and precipitation, lows will be in the mid to upper 60s and highs on Thursday will be in the 80s, with warmest temps over central/northeast MO, as well as, west central IL. Byrd .LONG TERM... (Thursday Night through Next Wednesday) Issued at 354 PM CDT Wed Jul 5 2017 Overall, mdls are in fairly good agreement thru the forecast period. The low system responsible for the ongoing TSRA will pull ewd out of the region tonight leaving the area under NW flow thru the weekend. Mdls prog a cdfnt pushing swd thru the area early Fri morning. However, given the location of the 850mb thermal ridge, temps on Fri are expected to be warmer than Thurs. There are some differences regarding how warm Fri will be, but have trended twd the warmer guidance for now. The weekend is expected to be slightly cooler than Fri as the sfc ridge builds into the region. Temps shud gradually warm next week as the upper low over ern Canada moves east and the upper ridge over the western U.S. builds into the area. Concerned that the going forecast does not warm temps quick enuf, but have sped up warming trends slightly. As for precip chances, chances remain fairly low thru the period. Have kept low chances with the fnt as it drops thru the area Fri afternoon and evening. While a severe storm can not be ruled out for nrn portions of the CWA for late Thurs night into Fri morning, given the timing and limited CAPE and shear, threat remains very low. A low threat for severe storms lingers Fri afternoon into evening across southern portions of the CWA as the fnt moves thru the region. A more Summer-like setup is expected next week with isod TSRA possible. PoPs are a little higher Wed of next week as a weak fnt is expected to linger in the region. Tilly && .AVIATION... (For the 18z TAFs through 18z Thursday Afternoon) Issued at 204 PM CDT Wed Jul 5 2017 Surface low continues to slowly track to the east northeast. In the meantime, isolated/scattered showers and storms are moving into taf sites, so kept vicinity ts mention through this evening. Otherwise, main issue is ceilings. MVFR/IFR cigs associated with low will linger over COU through 00z Thursday, while they will track into STL metro area by later this evening. So kept MVFR/IFR cigs in this area. Conditions to improve by mid morning on Thursday. East winds to gradually back to the north/northwest as low moves through region. SPECIFICS FOR KSTL: Surface low continues to slowly track to the east northeast. In the meantime, isolated/scattered showers and storms are moving into metro area, so kept vicinity ts mention through this evening. Otherwise, main issue is ceilings. MVFR/IFR cigs associated with low will track into STL metro area by later this evening. So kept MVFR/IFR cigs in this area. Conditions to improve by mid morning on Thursday. East winds to gradually back to the north/northwest as low moves through region. Byrd && .PRELIMINARY POINT TEMPS/POPS... Saint Louis 70 88 73 92 / 60 20 0 10 Quincy 67 88 71 88 / 30 0 10 5 Columbia 66 87 69 89 / 40 0 5 10 Jefferson City 67 87 69 91 / 50 5 5 10 Salem 69 84 69 91 / 60 50 0 20 Farmington 68 84 66 92 / 60 40 0 20 && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous Weather Outlook National Weather Service Saint Louis MO 359 PM CDT Wed Jul 5 2017 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-061200- Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL- Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO- Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO- Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO- Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- 359 PM CDT Wed Jul 5 2017 This hazardous weather outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight Thunderstorms are likely this evening capable of producing locally heavy rainfall. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday A few strong to severe thunderstorms are possible late Thursday night over northeast Missouri and west central Illinois. Damaging winds will be the primary threat. Isolated strong to severe thunderstorms will be possible again over southeast Missouri and southwest Illinois on Friday afternoon. Damaging winds will be the primary threat. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report rainfall amounts in excess of two inches or any flooding to the National Weather Service. Tilly
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
450 PM CDT WED JUL 05 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0200 PM HEAVY RAIN 3 SSW GASCONADE 38.63N 91.58W
07/05/2017 M4.40 INCH GASCONADE MO TRAINED SPOTTER
&&
EVENT NUMBER LSX1700524
GOSSELINPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 PM CDT WED JUL 05 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0506 PM HEAVY RAIN NEW HAVEN 38.61N 91.22W
07/05/2017 M2.28 INCH FRANKLIN MO BROADCAST MEDIA
&&
EVENT NUMBER LSX1700525
GOSSELINThe St Louis radar (KLSX), 152 km away, was scanning. The volume nearest the first event began at 23:02 UTC.
1 flash flood. Local standard time, as filed.
Up to three inches of rain fell in less than an hour causing flash flooding. County Road 306 near Taylor had 6 to 8 inches of fast flowing water over it.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2017Every state in 2017This day in weather historyWarnings in Missouri, July 2017
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: 720615.