A pre-frontal trof moved through region, triggering scattered storms. Some of the storms produced large hail.
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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 pre-frontal trof moved through region, triggering scattered storms. Some of the storms produced large hail.
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 May 28, 2:35 PM CST, 4 hours 36 minutes earlier.
Area Forecast Discussion National Weather Service Saint Louis MO 335 PM CDT SAT MAY 28 2016 .SHORT TERM... (Through Late Tonight) Issued at 333 PM CDT Sat May 28 2016 Prefrontal trof to slide through forecast area this evening. Showers and thunderstorms are already firing along it, but for the most part should remain scattered in nature. Best chances initially will be over central/northeast MO/west central IL, then slide southeast across rest of forecast area this evening. Decent instability and forcing, with the main threat being damaging winds. Otherwise, will see storms weaken after sunset, then partly cloudy with lows in the low to mid 60s. Byrd .LONG TERM... (Sunday through Next Saturday) Issued at 333 PM CDT Sat May 28 2016 Quieter weather is expected on Sunday as the upper level trough shifts northeast of our area. Could not rule out a few showers or storms across parts of southeast MO and southwest IL where there will be better low level moisture and instability near a southeastward moving weak surface trough. Slightly cooler low temperatures are expected for Sunday night due to less cloud cover, light or calm surface winds, and a little lower surface dew points. The potential for convection will gradually increase from west to east on Monday and Monday night as the surface ridge shifts east of our area and southerly flow returns. There should also be weak shortwaves moving eastward through the region in weak west- southwesterly upper level flow. A better chance of showers/storms is expected by Wednesday and continuing through at least Wednesday night as an upper level trough/low moves eastward through the northern Plains sending a cold front southeastward through our forecast area Wednesday and Wednesday night. May have post frontal showers on Thursday as a deep upper level trough moves through the region, possibly continuing into Thursday night or even Friday until the upper level trough and embedded shortwaves shifts east of our area. Cooler temperatures can be expected beginning on Thursday due to cold air advection behind the cold front. Drier conditions can also be expected heading into the next weekend as a relatively large surface ridge moves southeastward through our area with temperatures slightly below normal for early June. GKS && .AVIATION... (For the 18z TAFs through 18z Sunday Afternoon) Issued at 105 PM CDT Sat May 28 2016 Storms have begun to develop ahead of next frontal boundary over far northern MO. Coverage still expected to be spotty so kept vicinity thunderstorms for taf sites between 19z and 02z Sunday. Otherwise, VFR conditions outside of storms. South winds around 15kts to veer to the southwest by this evening, then veer to the west to northwest behind the cold front mid morning on Sunday. Specifics for KSTL: Storms have begun to develop ahead of next frontal boundary over far northern MO. Coverage still expected to be spotty so kept vicinity thunderstorms for metro area between 22z and 02z Sunday. Otherwise, VFR conditions outside of storms. South winds around 15kts to veer to the southwest by 02z Sunday, then veer to the west to northwest behind the cold front 16z Sunday. Byrd && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 342 PM CDT SAT MAY 28 2016 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- 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- 342 PM CDT SAT MAY 28 2016 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. A FEW STORMS MAY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS...ESPECIALLY ACROSS NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS DURING THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING. GKS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
644 PM CDT SAT MAY 28 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0643 PM HAIL 2 N EOLIA 39.27N 91.01W
05/28/2016 E0.25 INCH PIKE MO TRAINED SPOTTER
HAIL SLIGHTLY BIGGER THAN PEA SIZE
&&
GKSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 658 PM CDT SAT MAY 28 2016 MOZ059-062-072-073-290045- GASCONADE MO-FRANKLIN MO-WASHINGTON MO-CRAWFORD MO- 658 PM CDT SAT MAY 28 2016 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GASCONADE... SOUTHWESTERN FRANKLIN...NORTHERN CRAWFORD AND NORTHWESTERN WASHINGTON COUNTIES UNTIL 745 PM CDT... AT 658 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR CUBA...MOVING EAST AT 20 MPH. NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SULLIVAN...CUBA...BOURBON...LEASBURG...MIRAMIGUOA PARK...ST. CLOUD... OAK HILL...JAPAN AND STANTON. THIS INCLUDES INTERSTATE 44 IN MISSOURI BETWEEN EXITS 210 AND 230. THIS ALSO INCLUDES MERAMEC STATE PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. && LAT...LON 3807 9151 3822 9154 3840 9106 3811 9097 TIME...MOT...LOC 2358Z 254DEG 19KT 3816 9142 CARNEY
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
747 PM CDT SAT MAY 28 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0740 PM WALL CLOUD 3 WSW BOURBON 38.13N 91.30W
05/28/2016 CRAWFORD MO NWS EMPLOYEE
LOWERING WITH WEAK ROTATION.
&&
BYRDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
759 PM CDT SAT MAY 28 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0758 PM HAIL SULLIVAN 38.22N 91.17W
05/28/2016 E0.70 INCH FRANKLIN MO PUBLIC
&&
GKSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
806 PM CDT SAT MAY 28 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0805 PM HAIL SULLIVAN 38.22N 91.17W
05/28/2016 E0.25 INCH FRANKLIN MO TRAINED SPOTTER
WALL CLOUD TO THE WEST ALONG WITH PEA SIZE HAIL
0805 PM WALL CLOUD SULLIVAN 38.22N 91.17W
05/28/2016 FRANKLIN MO TRAINED SPOTTER
WALL CLOUD TO THE WEST ALONG WITH PEA SIZE HAIL
&&
GKSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
811 PM CDT SAT MAY 28 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0811 PM HAIL SULLIVAN 38.22N 91.17W
05/28/2016 E1.50 INCH FRANKLIN MO TRAINED SPOTTER
&&
GKSThe St Louis radar (KLSX), 69 km away, was scanning. The volume nearest the first event began at 01:07 UTC.
1 hail. Local standard time, as filed.
A slow moving severe storm moved through southern Franklin County with an extended period of large hail between Sullivan and Stanton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2016Every state in 2016This day in weather historyWarnings in Missouri, May 2016
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: 648429.