A very tropical airmass, weak surface boundaries and disturbances aloft resulted in very sufficient rain producers across Northwest Louisiana during the evening of July 10th. Some flash flooding was reported in Bossier City, 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 evening of July 10th. Some flash flooding was reported in Bossier City, 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 10, 8:57 PM CST, 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 957 PM CDT TUE JUL 10 2012 .DISCUSSION... CONVECTION SLIGHTLY LESS THAN WHAT WAS EXPECTED TODAY...BUT CURRENT COVERAGE STILL DECENT FOR POST-SUNSET ACTIVITY. COLD FRONT NOTED ACROSS CENTRAL OK/AR ATTM SHOULD BE MAKING SOME SWD PROGRESS OVERNIGHT...WHICH MAY HELP FOR CONVECTION TO REDEVELOP AS IT HAS OVER THE PAST SEVERAL NIGHTS. VERY MINOR COSMETIC CHANGES FOR THE GRIDS TONIGHT...WITH A FEW TWEAKS TO MIN TEMPS TO BRING THEM CLOSER TO PERSISTENCE. ALSO REMOVED MENTION OF LIKELY POPS FOR THE OVERNIGHT HOURS AS ONGOING/FCST CONVECTION SHOULD REMAIN ISOLATED TO WIDELY SCATTERED WITHOUT THE AID OF DAYTIME HEATING. PRODUCTS OUT SHORTLY. /12/ && .AVIATION... WIDELY SCATTERED SHWRS AND TSTMS THIS EVENING WILL BECOME ISOLATED BY 06Z WITH MOST OF FOUR STATE REGION VFR. WITH AVAILABLE MOISTURE REMAINING HIGH...COMBINED WITH A STALLED FRONTAL BOUNDARY WIDESPREAD REDEVELOPMENT LIKELY AGAIN AFTER 15Z WEDNESDAY. FLIGHT CONDITIONS WILL BEGIN MOSTLY VFR AT THE 06Z TAF ISSUANCE...BUT LOOK FOR WIDESPREAD IFR CIGS AFTER 09Z...CONTINUING TO AROUND 15Z. SOME LOCATIONS WILL EXPERIENCE PERIODS OF IFR IN FOG BETWEEN 09Z AND 15Z...ESPECIALLY TERMINALS WHICH RECEIVED RAIN THIS EVENING... INCLUDING KSHV AND KMLU. WITH A STALLED FRONTAL BOUNDARY HANGING JUST NORTH OF INTERSTATE 20 WEDNESDAY AND WIDESPREAD CONVECTIVE ACTIVITY...SURFACE WIND WILL BE QUITE VARIABLE ACROSS THE REGION. WIND SPEED GENERALLY BETWEEN 5 AND 10 KTS EXCEPT GUSTY VICINITY OF TSTMS. /14/ && .PRELIMINARY POINT TEMPS/POPS... SHV 73 87 71 91 70 / 40 50 40 30 20 MLU 72 87 69 89 70 / 40 60 50 40 30 DEQ 70 90 69 92 69 / 30 30 20 10 10 TXK 71 88 70 91 70 / 30 40 30 20 20 ELD 70 86 69 89 70 / 40 60 40 30 20 TYR 73 88 70 90 72 / 40 50 30 20 20 GGG 73 88 70 92 71 / 40 50 40 30 20 LFK 72 88 69 91 72 / 40 50 40 40 30 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. && 12/14
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1130 AM CDT TUE JUL 10 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>167-111200- 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- 1130 AM CDT TUE JUL 10 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...THIS AFTERNOON AND TONIGHT... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE FOUR STATE AREA THIS AFTERNOON AND TONIGHT. THE ATMOSPHERE REMAINS RICH WITH MOISTURE AND STORMS MAY BE SLOW MOVING...WHICH COULD LEAD TO LOCALLY HEAVY RAINFALL. IN ADDITION...STRONG AND GUSTY WINDS WILL BE POSSIBLE IN A FEW OF THE STRONGER STORMS AND ESPECIALLY IN ANY GROUPS OR SEGMENTS OF THUNDERSTORM ACTIVITY...WHICH COULD RESULT IN TREE AND POWER LINE DAMAGE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... A WEAK COLD FRONT WILL EASE DOWN INTO THE FOUR STATE AREA BY EARLY WEDNESDAY AND BECOME STATIONARY ACROSS EAST TEXAS...NORTH CENTRAL LOUISIANA AND SOUTHEAST ARKANSAS. THIS FRONT WILL SERVE AS A FOCUS FOR ADDITIONAL THUNDERSTORM DEVELOPMENT OVER THE NEXT SEVERAL DAYS. A FEW OF THE STRONGER STORMS MAY PRODUCE LOCALLY HEAVY RAINFALL AND STRONG WIND GUSTS. .SPOTTER INFORMATION STATEMENT... DUE TO THE ISOLATED NATURE OF ANY POSSIBLE DAMAGING WIND GUSTS...ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO OPERATORS AND STORM SPOTTERS IS NOT EXPECTED THROUGH TONIGHT. 13
The Shreveport radar (KSHV), 14 km away, was scanning. The volume nearest the first event began at 03:07 UTC.
1 flash flood. Local standard time, as filed.
Old Minden Road north of Interstate 20 was closed due to high water. Several cars were stalled out.
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: 386991.