A strong cold front moved through the region triggering showers and thunderstorms. Some of the storms produced damaging winds and large hail.
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.
A strong cold front moved through the region triggering showers and thunderstorms. Some of the storms produced damaging winds and 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 9, 11:48 AM CST, 32 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 1248 PM CDT Fri May 9 2014 .SHORT TERM: (Through Late This Afternoon) Issued at 330 AM CDT Fri May 9 2014 Lead short wave trof located near the KS/MO border at 07z will continue to track northeast this morning. The large scale ascent associated with this feature will be located east of the MS River at 12z and exit the CWA before 14-15z, taking the majority of ongoing showers with it. Present indications are there will then be some downtime with little to no activity as the front pushes east and becomes increasingly northeast-southwest oriented. Between 18-19z scattered thunderstorms are expected to develop within a convergence zone along/ahead of the boundary from south central MO into southwest IL where SBCAPE of 1500-2500 J/KG will preside. West southwesterly shear of 40+ kts suggests organized severe in the form of supercells initially with hail as the main threat, however the orientation of the shear parallel to the forcing suggests mergers and upscale growth into a more linear mode by late afternoon/early evening. Highs today will be cooler than yesterday, ranging from the lower 70s to lower 80s. Glass .LONG TERM: (Tonight through Thursday) Issued at 330 AM CDT Fri May 9 2014 Ongoing storms from this afternoon will be located across far southeast MO into southern IL at 00z and exit the CWA by mid- evening. I am expecting dry conditions then for the remainder of the night with the surface boundary becoming increasingly diffuse and a lack of any low level convergence. A stormy pattern will then take shape from Saturday into Monday. There will be a northward surge of deep quality low level moisture on Saturday as the surface boundary becomes better defined again and retreats northward with strengthening low level flow. Heating of this air mass and the eastward spread of steep mid level lapse rates should yield a very unstable warm sector air mass on Saturday afternoon. The main uncertainty is the impetus for convective development. Little if any CIN is present by mid afternoon and a very weak impulse aloft will be tracking across the region, so my thoughts are that scattered storms will develop during the afternoon in the vicinity of central MO. Shear will be more than sufficient for organized severe. Guidance shows a broad swly LLJ evolving on Saturday night with an elongated convergence zone from KS into MO, so this activity may evolve into an eastward moving MCS with yet another MCS developing upstream over KS and pushing east as well. Sunday into Sunday night the greatest focus for organized convection including severe storms remains in a broad zone along and ahead of the next slow moving cold front, mainly impacting central/northeast MO and west central IL within our CWA. This threat will shift eastward on Monday and Monday night across the remainder of the CWA as the front moves slowly east. Glass && .AVIATION: (For the 18z TAFs through 18z Saturday Afternoon) Issued at 1227 PM CDT Fri May 9 2014 Main concern for this afternoon is threat of TSRA in STL area, and for details on this see specific KSTL section below. For KUIN and KCOU, only expecting a few fair weather clouds aoa 3kft this afternoon, with this cloudiness dissipating this evening followed by another batch of high level clouds pushing into the region late tonight and Saturday morning. Specifics for KSTL: Believe primary threat of storms will be S of STL metro this afternoon as current activity over E Ozarks tracks into S IL. However, cannot totally rule out some development further north near frontal boundary...which appears to be near a SPI to west of VIH line attm. While IFR cigs/vsbys are likely with the most robust convection, outside of the storms expect clouds aoa 5kft. Shortwave fueling this afternoon's storms should give the front enough of an ewd kick on end the thunderstorm threat by early this evening. Any clouds overnight and into Saturday morning should be high level ci. Truett && .LSX WATCHES/WARNINGS/ADVISORIES: MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 458 AM CDT FRI MAY 9 2014 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-101000- 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-ST. 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-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 458 AM CDT FRI MAY 9 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS PORTIONS OF SOUTHEAST AND EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS THIS AFTERNOON AND EARLY THIS EVENING. SOME OF THESE STORMS MAY BE SEVERE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE CHANCE OF THUNDERSTORMS WILL PERSIST ACROSS THE REGION SATURDAY THROUGH MONDAY NIGHT. SOME OF THE STORMS MAY BE SEVERE SATURDAY THROUGH SUNDAY NIGHT CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. GLASS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1054 AM CDT FRI MAY 9 2014 MOZ072-073-084-099-091645- CRAWFORD MO-IRON MO-REYNOLDS MO-WASHINGTON MO- 1054 AM CDT FRI MAY 9 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN WASHINGTON... NORTHWESTERN REYNOLDS...IRON AND SOUTHERN CRAWFORD COUNTIES UNTIL 1145 AM CDT... AT 1051 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING THUNDERSTORMS ALONG A LINE EXTENDING FROM STEELVILLE TO 12 MILES WEST OF HOUSTON...AND MOVING EAST AT 45 MPH. SMALL HAIL UP TO ONE-HALF INCH IN DIAMETER IS POSSIBLE WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... POTOSI... CHERRYVILLE... COURTOIS... VIBURNUM... MINERAL POINT... BIXBY... BUNKER... IRONDALE... OATES... THESE STORMS WILL ALSO IMPACT DILLARD MILL HISTORIC SITE. TRUETT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1143 AM CDT FRI MAY 9 2014 MOZ072>074-084-099-091730- CRAWFORD MO-IRON MO-REYNOLDS MO-ST. FRANCOIS MO-WASHINGTON MO- 1143 AM CDT FRI MAY 9 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN WASHINGTON...ST. FRANCOIS...NORTHERN REYNOLDS...IRON AND SOUTHEASTERN CRAWFORD COUNTIES UNTIL 1230 PM CDT... AT 1140 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTHEAST OF COURTOIS TO 7 MILES SOUTH OF SALEM...AND MOVING EAST AT 45 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THESE STORMS... ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... POTOSI... BONNE TERRE... LEADWOOD... DESLOGE... BISMARCK... FARMINGTON... COURTOIS... VIBURNUM... BIXBY... IRONDALE... THIS LINE OF STORMS WILL ALSO IMPACT DILLARD MILL HISTORIC SITE...ELEPHANT ROCKS STATE PARK...FORT DAVIDSON HISTORIC SITE...JOHNSONS SHUT-INS STATE PARK...MISSOURI MINES HISTORIC SITE...ST. JOE STATE PARK AND TAUM SAUK MOUNTAIN STATE PARK. TRUETT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1233 PM CDT FRI MAY 9 2014 MOZ074-075-091815- ST. FRANCOIS MO-STE. GENEVIEVE MO- 1233 PM CDT FRI MAY 9 2014 ...SIGNIFICANT WEATHER ADVISORY FOR ST. FRANCOIS AND SOUTHERN STE. GENEVIEVE COUNTIES UNTIL 115 PM CDT... AT 1231 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR BELLEVIEW...OR 5 MILES SOUTHWEST OF BISMARCK...MOVING EAST AT 50 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BISMARCK... FARMINGTON... KNOB LICK... WOMAC... COFFMAN... WEINGARTEN... ST. MARY... THIS STORM WILL ALSO IMPACT HAWN STATE PARK...MISSOURI MINES HISTORIC SITE AND ST. JOE STATE PARK. THIS STORM WILL ALSO IMPACT... INTERSTATE 55 IN MISSOURI FROM EXIT 141 TO EXIT 143. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. TES
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1253 PM CDT FRI MAY 9 2014 MOZ084-099-091845- IRON MO-REYNOLDS MO- 1253 PM CDT FRI MAY 9 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN REYNOLDS AND IRON COUNTIES UNTIL 145 PM CDT... AT 1252 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR BUNKER...OR 19 MILES SOUTHEAST OF SALEM... MOVING EAST AT 30 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... OATES... THIS STORM WILL ALSO IMPACT JOHNSONS SHUT-INS STATE PARK. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. IN ADDITION...THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA UNTIL 8 PM CDT. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. TES
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
108 PM CDT FRI MAY 09 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0101 PM HAIL FARMINGTON 37.78N 90.43W
05/09/2014 E0.25 INCH ST. FRANCOIS MO FIRE DEPT/RESCUE
REPORTED BY FARMINGTON FIRE AND RESCUE.
&&
FUCHSThe St Louis radar (KLSX), 114 km away, was scanning. The volume nearest the first event began at 18:19 UTC.
3 hail, 1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down several large trees. Also, an old barn was blown down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2014Every state in 2014This day in weather historyWarnings in Missouri, May 2014
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: 521256, 521257, 521259, 521260.