A very tropical airmass, weak surface boundaries and disturbances aloft resulted in very sufficient rain producers across Northwest Louisiana during the morning of July 9th. Some flash flooding was reported in Mansfield, Louisiana.
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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 SHV wrote it up.
A very tropical airmass, weak surface boundaries and disturbances aloft resulted in very sufficient rain producers across Northwest Louisiana during the morning of July 9th. Some flash flooding was reported in Mansfield, Louisiana.
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 Shreveport, LA wrote its last area forecast discussion before the first event at Jul 9, 3:09 AM CST, 3 hours 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 409 AM CDT MON JUL 9 2012 .DISCUSSION... STRONG UPPER LVL RIDGE HAS CONTINUED TO SHIFT WESTWARD ACROSS KS/NE WITH SHORT WAVES ROTATING INTO OUR AREA IN DEEP EASTERLY FLOW. ONCE AGAIN...THERE APPEARS TO BE NO FOCUS FOR CONVECTION...AND NOCTURNAL MINIMUM TRENDS STILL IN PLACE. HOWEVER...FCST SOUNDINGS SUGGEST DEEP MOISTURE STILL ON INCREASE...WITH PW VALUES AROUND 2 INCHES STILL ON THE INCREASE. AS NORTHERLY FLOW ALOFT INCREASES WITH THE WESTWARD SHIFT OF THE UPPER RIDGE...A WEAK FRONTAL BOUNDARY WILL EDGE INTO NROTHERN CWA TUESDAY...AND STALL OUT AT LEAST THRU WEDNESDAY. KEEP POPS IN FCST THRU EXTENDED...BUT WILL GO CONSERVATIVELY BELOW GUIDANCE BEYOND THURSDAY. INCREASED CLOUDS AND CONVECTION SHOULD HOLD IN THE UPPER 80S TO LOWER 90S RANGE THROUGH MUCH OF THE UPCOMING WEEK AS WELL./VII/. && .AVIATION... GENERALLY VFR CONDITIONS SHOULD CONTINUE THROUGH MUCH OF THE TAF PERIOD. ELEVATED CU/AC IS DOMINANT OVER MUCH OF THE REGION THIS MORNING...WITH THE RADAR MOSAIC INDICATING A BROAD UPPER LEVEL LOW PRESSURE SYSTEM CENTERED OVER THE REGION...WITH SMALLER CIRCULATIONS PRESENT JUST S OF PBF AND MEM AS OF 08Z. ISOLATED -SHRA HAVE REDEVELOPED THIS MORNING OVER CNTRL/NE LA AND SE AR...WITH AREAS OF CONVECTION EXPECTED TO BECOME MORE WIDESPREAD BY MIDDAY/AFTERNOON OVER MUCH OF THE REGION ONCE LIMITED HEATING COMMENCES. CAN/T RULE OUT AREAS OF IFR/MVFR CIGS THIS MORNING...WITH LOW VFR CIGS EXPECTED FOR THE LATE MORNING/AFTERNOON HOURS. WILL CONTINUE MENTION OF VCTS TODAY FOR THE AFFECTED TERMINALS WITH THE 12Z TAF ISSUANCE...BUT MAY TEMPO IN THUNDER MENTION BASED ON THE LATEST RADAR OBSERVATIONS. AMENDMENTS WILL BE LIKELY THOUGH GIVEN THE WEAK SHEAR/DISORGANIZED NATURE OF THE CONVECTION...WITH MVFR CIGS/REDUCED VSBYS...WIND GUSTS EXCEEDING 35KTS...AND EXTREME TURBULENCE POSSIBLE IN THE STRONGER STORMS. THE CONVECTION SHOULD DIMINISH BY MID TO LATE EVENING...ALTHOUGH ADDITIONAL REDEVELOPMENT WILL BE POSSIBLE OVERNIGHT...ESPECIALLY OVER E TX/N LA/SCNTRL AR. CONVECTIVE DEBRIS CONTAINING VARIOUS VFR CIGS SHOULD PERSIST OVERNIGHT...WITH ISOLATED AREAS OF MVFR/IFR CIGS POSSIBLE. AM EXPECTING MORE OF THE SAME FOR TUESDAY WITH A MIX OF MVFR/VFR CIGS LIKELY...AS CONVECTION DEVELOPS DURING THE DAY ONCE A WEAK FRONTAL SYSTEM DRIFTS S INTO THE REGION. SSW WINDS 5-8KTS TODAY...EXCEPT VRB AND GUSTY IN/NEAR THE STORMS...WILL BECOME LT/VRB AFTER 00Z. /15/ && .PRELIMINARY POINT TEMPS/POPS... SHV 90 74 89 73 88 / 60 40 50 40 50 MLU 87 75 89 73 86 / 60 40 50 40 50 DEQ 92 73 87 69 88 / 50 50 60 50 50 TXK 90 74 88 70 88 / 60 50 60 50 50 ELD 89 73 87 71 88 / 60 50 60 50 50 TYR 92 75 88 71 88 / 50 30 60 50 50 GGG 91 74 88 72 89 / 60 40 60 50 50 LFK 92 76 88 75 87 / 60 30 50 40 50 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 550 AM CDT MON JUL 9 2012 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-101100- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN- UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA- NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE- FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG- HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA- SAN AUGUSTINE-SABINE TX- 550 AM CDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA... NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS THE REGION TODAY AND TONIGHT. LOCALLY HEAVY RAIN MAY OCCUR...AND STRONG GUSTY WINDS WILL BE POSSIBLE IN A FEW OF THE STRONGER STORMS...WHICH COULD RESULT IN TREE AND POWER LINE DAMAGE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED FOR THE NEXT SEVERAL DAYS...WITH STRONG DAYTIME HEATING AND A SERIES OF DISTURBANCES TRAVELING ACROSS THE AREA. A FEW STRONGER THUNDERSTORMS MAY PRODUCE STRONG WIND GUSTS...THAT COULD RESULT IN TREE AND POWER LINE DAMAGE AS WELL AS LOCALIZED HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... DUE TO THE VERY ISOLATED NATURE OF ANY POSSIBLE DAMAGING WIND GUSTS.... ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO OPERATORS...AND STORM SPOTTERS IS NOT EXPECTED THROUGH TONIGHT. VII
The Shreveport radar (KSHV), 47 km away, was scanning. The volume nearest the first event began at 12:32 UTC.
1 flash flood. Local standard time, as filed.
Locally heavy rainfall resulted in water coming into the local hospital. Patients had to be moved to other higher floors in the hospital.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2012Every state in 2012This day in weather historyWarnings in Louisiana, July 2012
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: 386990.