A large cluster of thunderstorms that mainly impacted Oklahoma and Arkansas, clipped far southwest Missouri with a brief period of heavy rain. Marginal flooding was observed in Barry and McDonald counties.
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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 SGF wrote it up.
A large cluster of thunderstorms that mainly impacted Oklahoma and Arkansas, clipped far southwest Missouri with a brief period of heavy rain. Marginal flooding was observed in Barry and McDonald 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 Springfield, MO wrote its last area forecast discussion before the first event at Apr 12, 5:28 AM CST, 5 hours 28 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPRINGFIELD MO 628 AM CDT SUN APR 12 2009 ...UPDATE TO AVIATION... .DISCUSSION... MAIN FORECAST HIGHLIGHTS/CHALLENGES IN THIS FORECAST PACKAGE WILL CONTINUE TO DEAL WITH THE STORM SYSTEM TO THE SOUTHWEST AND ASSOCIATED RAIN AND THUNDERSTORM CHANCES TODAY AND MONDAY. CURRENTLY...SHOWERS AND THUNDERSTORMS EXTEND FROM NORTHEASTERN OKLAHOMA TO SOUTH CENTRAL TEXAS EARLY THIS MORNING...AHEAD OF AN UPPER LEVEL LOW ACROSS NEW MEXICO EARLY THIS MORNING. A VERY DRY AIRMASS IS IN PLACE ACROSS THE AREA AHEAD OF THIS SYSTEM...BUT WILL CONTINUE TO MOISTEN FROM THE WEST TO EAST THIS MORNING. THE SHOWERS ACROSS NORTHEASTERN OKLAHOMA WILL CONTINUE TO SPREAD TO THE NORTHEAST INTO THE AREA THIS MORNING....OVERCOMING THE DRY AIR ACROSS THE WESTERN CWA AROUND DAYBREAK. THIS RAIN WILL SLOWLY SPREAD EAST THROUGH THE DAY...WITH MAINLY THE WESTERN AND SOUTHERN CWA AFFECTED THIS MORNING...AND ACTIVITY SPREADING ACROSS THE ENTIRE CWA THIS AFTERNOON AND EVENING. SCATTERED ACTIVITY WILL LIKELY OCCUR OVERNIGHT WITH THE BETTER CHANCES OCCURRING ACROSS THE NORTHERN CWA. THE LOW WILL REMAIN WELL TO THE SOUTH TODAY AND THE WARM SECTOR WILL ALSO. SO...INSTABILITY AND THE SEVERE WEATHER THREAT WILL REMAIN SOUTH OF THE AREA TODAY AND TONIGHT. THERE MAY BE ENOUGH INSTABILITY FOR A RUMBLE OF THUNDER OR TWO HOWEVER. MAINLY LOOKING AT A NICE STEADY LIGHT TO MODERATE RAINFALL OCCURRING ACROSS THE AREA. THE LOW WILL TRACK FROM THE SOUTHWEST INTO AND THROUGH THE AREA ON MONDAY. COOLER TEMPERATURES WILL BUILD INTO THE AREA ON THE BACKSIDE OF THE LOW AND RELATIVELY WARMER AND MORE MOIST AIR IN PLACE AHEAD OF THE LOW. WITH THE LOW EXPECTED TO BE OVERHEAD ON MONDAY THIS WILL LIKELY RESULT IN A TEMPERATURE GRADIENT OF AROUND 10 DEGREES OR SO FROM THE NORTHWESTERN CWA TO THE SOUTHEASTERN CWA. INSTABILITY WILL ALSO INCREASE ACROSS SOUTH CENTRAL MISSOURI MONDAY AS THE LOW TRACKS INTO THE AREA AND TEMPERATURES ALOFT COOL. THESE CONDITIONS WILL RESULT IN A SEVERE HAIL THREAT ACROSS SOUTH CENTRAL MISSOURI DURING THE LATE MORNING AND AFTERNOON HOURS. THE LOW WILL TRACK EAST OF THE AREA MONDAY AFTERNOON AND WRAP AROUND RAIN MAY LINGER ACROSS THE AREA... ESPECIALLY THE EASTERN CWA INTO MONDAY NIGHT. A COLD AIRMASS WILL BUILD INTO THE REGION BEHIND THIS SYSTEM AND TEMPERATURES MONDAY NIGHT WILL HAVE TO BE WATCHED AS LOWS SHOULD DROP INTO THE 30S. RIGHT NOW IT APPEARS CLOUDS WILL LINGER OVER THE AREA DURING THE OVERNIGHT HOURS...LIMITING ANY FROST POTENTIAL. HOWEVER IF THE SKIES CLEAR OUT QUICKER THERE COULD BE SOME FROST POTENTIAL. UPPER LEVEL RIDGING BUILDS OVER THE REGION DURING THE MID PART OF THE WEEK...WITH SEASONABLE TEMPERATURES RETURNING TO THE AREA. THE NEXT STORM SYSTEM WILL AFFECT THE AREA LATE NEXT WEEK BRINGING ADDITIONAL SHOWERS AND THUNDERSTORM CHANCES TO THE REGION. WISE && .AVIATION... FOR THE 12Z TAF PACKAGE...COMPLEX FORECAST AS A LARGE STORM SYSTEM CONTINUES TO MOVE NORTHEASTWARD INTO THE REGION AND INTO A DRY AIRMASS. REGIONAL RADAR INDICATES A WIDE SWATH OF RAINFALL MOVING NORTHEASTWARD INTO THE AREA. MUCH OF THIS MOISTURE HAS BEEN SPENT MOISTENING THE ATMOSPHERE WITH LIGHT RAIN JUST NOW BEING REPORTED AT JLN. VFR CIG/VIS WILL CONTINUE AT JLN THROUGH MID MORNING... WITH A TRANSITION TO MVFR BY LATE MORNING. VFR CONDITIONS ARE EXPECTED THROUGH MOST OF THIS MORNING AT SGF...TRANSITIONING TO MVFR FROM MIDDAY INTO THE EARLY AFTERNOON HOURS. PERSISTENT LIFT ACROSS MUCH OF THE MIDWEST WILL MAINTAIN RAIN AT BOTH TAF SITES ALL DAY AND THROUGH MUCH OF THE EVENING. AVAILABLE MODEL OUTPUT AND STATISTICS INDICATE THAT WE SHOULD TRANSITION TO IFR CIGS BY LATE THIS AFTERNOON AND HAVE FOLLOWED ACCORDINGLY. IFR WILL PERSIST THROUGH TONIGHT WITH DRIZZLE AND ADDITIONAL RAIN SHOWERS POSSIBLE. GAGAN && .SGF WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPRINGFIELD MO 840 AM CDT SUN APR 12 2009 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-131000- BOURBON-CRAWFORD-CHEROKEE-BENTON-MORGAN-MILLER-MARIES-VERNON- ST. CLAIR-HICKORY-CAMDEN-PULASKI-PHELPS-BARTON-CEDAR-POLK-DALLAS- LACLEDE-TEXAS-DENT-JASPER-DADE-GREENE-WEBSTER-WRIGHT-NEWTON- LAWRENCE-CHRISTIAN-DOUGLAS-HOWELL-SHANNON-MCDONALD-BARRY-STONE- TANEY-OZARK-OREGON- 840 AM CDT SUN APR 12 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI OZARKS AND EXTREME SOUTHEAST KANSAS. .DAY ONE...TODAY AND TONIGHT. A LARGE SHIELD OF MODERATE TO HEAVY RAIN WILL SPREAD ACROSS MUCH OF SOUTHERN MISSOURI TODAY. A FEW EMBEDDED THUNDERSTORMS WILL ACCOMPANY THIS ACTIVITY. LOCALLY HEAVY RAINFALL LEADING TO FLASH FLOODING IS LIKELY OVER SOME AREAS OF SOUTHERN MISSOURI. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. SCATTERED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS SOUTH CENTRAL AND CENTRAL MISSOURI MONDAY. LARGE HAIL CAN NOT BE RULED OUT OVER AREAS ALONG AND EAST OF HIGHWAY 63. YET ANOTHER STORM SYSTEM WILL MOVE INTO THE AREA BRINGING A CHANCE OF THUNDERSTORMS LATE NEXT WEEK INTO THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. && THIS PRODUCT IS NOW AVAILABLE IN GRAPHICAL FORMAT...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION...AT HTTP://WWW.CRH.NOAA.GOV/SGF(ALL LOWERCASE) WISE / CRAMER
The Springfield radar (KSGF), 93 km away, was scanning. The volume nearest the first event began at 16:57 UTC.
2 flash flood. Local standard time, as filed.
Excessive rain caused sections of Highway 37 and Highway 90 near Seligman to experience flash flooding.
A section of Highway 59 was flooded from Butler Creek rising out of its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2009Every state in 2009This day in weather historyWarnings in Missouri, April 2009
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: 159795, 159796.