Triple digit afternoon temperatures and a moist atmosphere resulted in a very unstable airmass across northern Louisiana during the afternoon and evening hours of August 5th. Storms developed during the heating of the day and these storms produce strong and damaging wind gusts that downed trees and powerlines across portions of the region.
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 SHV wrote it up.
Triple digit afternoon temperatures and a moist atmosphere resulted in a very unstable airmass across northern Louisiana during the afternoon and evening hours of August 5th. Storms developed during the heating of the day and these storms produce strong and damaging wind gusts that downed trees and powerlines across portions of the region.
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 Aug 5, 2:22 PM CST, 58 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
322 PM CDT THU AUG 5 2010
.DISCUSSION...
UPPER LEVEL RIDGE SHOWING SIGNS OF BREAKING DOWN...WITH ISOLD
CONVECTION OCCURRING WITHIN RIDGE...OVER NW LA AND EAST TX LAKES.
ALONG EAST AND SOUTH PERIPHERY OF RIDGE...TSTM ACTIVITY BECMG
VIGOROUS. PLACED 40 POPS OVER SE CORNER OF CWA AND MENTIONED
HEAVY RAIN FOR THIS EVENING...ALTHOUGH THIS SHOULD BE SOMEWHAT
DIURNAL. MEANWHILE...DIFFUSE FRONTAL BOUNDARY HAS SUNK SOUTH OF
INTERSTATE 40...WITH SCATTERED LINE OF STORMS BEGINNING TO CLIP
SE OK. LEAVE IN ISOLD OVERNIGHT HOURS FAR NORTH CWA TO ACCOUNT
FOR THIS ACTIVITY. AS THE RIDGE SHIFTS WEST FRIDAY AND FRONT SAGS
SOUTH...TSTM COVERAGE WILL INCREASE...AIDED BY OUTFLOW BOUNDARIES
CURRENTLY BEING GENERATED. TIMING OF THIS CONVECTION DICTATES
WHETHER HEAT ADVISORY CONDTIONS HOLD INTO TOMORROW AFTN...AND
EXCESSIVE HEAT WARNING HAS BEEN DISCONTINUED. ALSO WILL MENTION
LOCALLY HEAVY RAINFALL DURING AFTN FRIDAY GIVEN TRENDS LAST COUPLE
DAYS FOR VERY HEAVY RAIN PRODUCING CELLS BEING GENERATED IN THIS
EASTERLY FLOW REGIME.
MEANWHILE...NEAR RECORD HOT TEMPERATURES PAST FEW DAYS WILL BE REPLACED
BY SEASONALLY HOT TEMPERATURES...TEMPERED BY INCREASED CONVECTION AND
PRESENCE OF WEAK FRONTAL BOUNDARY. HOWEVER...DEWPOINTS NORTH OF
FRONT STILL AROUND 70 DEGREES. AS UPPER LOW NORTH OF GREAT LAKES
RETREATS TO NE LATER IN THE WEEKEND...BRING POPS BACK TO ISOLD AND
SEE TEMPS CLIMB BACK TO NEAR CENTURY MARK AS RIDGE REBUILDS BACK
INTO AREA...BUT THIS TIME WILL BE CENTERED OVER NORTHERN
AR...RATHER THAN EAST TX./VII/
&&
.AVIATION...
MAINLY VFR FLIGHT CATEGORIES FOR THE FOUR STATE REGION THROUGH
07/00Z. ONGOING...MOSTLY ISOLATED SHOWERS AND THUNDERSTORMS
EXPECTED TO CONTINUE FOR THE REMAINDER OF THE AFTERNOON AND EVENING.
THESE WILL CREATE FLIGHT HAZARDS SUCH AND WIND...TURBULENCE AND
IFR VISIBILITIES. HIGHEST CONCENTRATION EXPECTED OVER NORTH CENTRAL
LOUISIANA...SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS. MOST
CONVECTION SHOULD END BY 06/03Z...BUT WILL REDEVELOP AGAIN FRIDAY.
SURFACE WINDS WEST TO SOUTHWEST 5 TO 10 KTS BECOMING LIGHT AFTER
SUNSET. /14/
&&
.PRELIMINARY POINT TEMPS/POPS...
SHV 78 99 78 96 76 / 20 30 30 20 20
MLU 80 96 76 95 78 / 20 40 30 30 20
DEQ 77 95 75 96 74 / 20 30 30 20 20
TXK 77 97 76 96 75 / 20 30 30 20 20
ELD 77 97 76 95 78 / 20 40 30 30 20
TYR 78 101 78 98 76 / 10 20 20 20 20
GGG 78 101 78 97 76 / 20 20 20 20 20
LFK 79 100 78 98 76 / 20 20 20 20 20
&&
.SHV WATCHES/WARNINGS/ADVISORIES...
AR...HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR THE FOLLOWING ZONES:
ARZ050-051-059>061-070>072.
EXCESSIVE HEAT WARNING UNTIL 7 PM CDT THIS EVENING FOR THE
FOLLOWING ZONES: ARZ073.
HEAT ADVISORY FROM 7 PM THIS EVENING TO 7 PM CDT FRIDAY FOR THE
FOLLOWING ZONES: ARZ073.
LA...HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR THE FOLLOWING ZONES:
LAZ001>003-010-011-017.
EXCESSIVE HEAT WARNING UNTIL 7 PM CDT THIS EVENING FOR THE
FOLLOWING ZONES: LAZ004>006-012>014-018>022.
HEAT ADVISORY FROM 7 PM THIS EVENING TO 7 PM CDT FRIDAY FOR THE
FOLLOWING ZONES: LAZ004>006-012>014-018>022.
OK...HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR THE FOLLOWING ZONES:
OKZ077.
TX...HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR THE FOLLOWING ZONES:
TXZ096-097-108>112-124>126-136>138-149>153-165>167.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1148 AM CDT THU AUG 5 2010 ARZ050-051-059>061-070>072-LAZ001>003-010-011-017-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-061700- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-CADDO-BOSSIER-WEBSTER-DE SOTO-RED RIVER-SABINE LA- MCCURTAIN-BOWIE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR- MARION-SMITH-GREGG-HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES- SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX- 1148 AM CDT THU AUG 5 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST ARKANSAS...NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... A STRONG UPPER LEVEL RIDGE OF HIGH PRESSURE REMAINS IN CONTROL OF THE WEATHER ACROSS THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY REGION. HIGH TEMPERATURES THIS AFTERNOON ARE EXPECTED TO CLIMB BETWEEN 99 AND 103 DEGREES. THESE TEMPERATURES...WHEN COMBINED WITH A VERY HUMID AIRMASS...WILL RESULT IN HEAT INDICES OF 105 TO 109 DEGREES. A HEAT ADVISORY REMAINS IN EFFECT FOR THE AREA THROUGH FRIDAY EVENING. AREA RESIDENTS ARE URGED TO DRINK PLENTY OF WATER...STAY IN AN AIR CONDITIONED ROOM AND OUT OF THE SUN...AND CHECK UP ON RELATIVES...NEIGHBORS...AND PETS. AS THE RIDGE BEGINS TO DRIFT WESTWARD TODAY...A FEW SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE...MAINLY ACROSS NORTHWEST LOUISIANA...AND SOUTHWEST ARKANSAS. ALTHOUGH A SEVERE WIND GUST OR TWO CANNOT BE RULED OUT...NO WIDESPREAD SEVERE WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... HOT TEMPERATURES WILL LIKELY CONTINUE THROUGH FRIDAY...AS AN UPPER LEVEL RIDGE MAINTAINS SOME OF ITS GRIP ON THE REGION. HOWEVER... SOME RELIEF FROM THE HEAT MAY COME BY THE WEEKEND...AS THE CENTER OF THE RIDGE SHIFTS WESTWARD. THIS WILL ALLOW A FRONT TO MOVE INTO THE REGION TRIGGERING SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. WHILE A SEVERE STORM OR TWO CANNOT BE RULED OUT ON FRIDAY...NO WIDESPREAD SEVERE WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. ARZ073-LAZ004>006-012>014-018>022-061700- UNION AR-CLAIBORNE-LINCOLN-UNION LA-BIENVILLE-JACKSON-OUACHITA- NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE- 1148 AM CDT THU AUG 5 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...NORTH CENTRAL LOUISIANA AND NORTHWEST LOUISIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT... A STRONG UPPER LEVEL RIDGE OF HIGH PRESSURE REMAINS IN CONTROL OF THE WEATHER ACROSS THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY REGION. HIGH TEMPERATURES THIS AFTERNOON ARE EXPECTED TO CLIMB BETWEEN 99 AND 103 DEGREES. THESE TEMPERATURES...WHEN COMBINED WITH A VERY HUMID AIRMASS...WILL RESULT IN DANGEROUS HEAT INDICES OF 110 TO 114 DEGREES. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT FOR PARTS OF NORTH LOUISIANA THROUGH THURSDAY EVENING. AREA RESIDENTS ARE URGED TO DRINK PLENTY OF WATER...STAY IN AN AIR CONDITIONED ROOM AND OUT OF THE SUN...AND CHECK UP ON RELATIVES...NEIGHBORS...AND PETS. AS THE RIDGE BEGINS TO DRIFT WESTWARD TODAY...SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE...THE GREATEST COVERAGE OF WHICH WILL AFFECT NORTH CENTRAL LOUISIANA. ALTHOUGH A SEVERE WIND GUST OR TWO CANNOT BE RULED OUT...NO WIDESPREAD SEVERE WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... HOT TEMPERATURES WILL LIKELY CONTINUE THROUGH FRIDAY...AS AN UPPER LEVEL RIDGE MAINTAINS SOME OF ITS GRIP ON THE REGION. HOWEVER... SOME RELIEF FROM THE HEAT MAY COME BY THE WEEKEND...AS THE CENTER OF THE RIDGE SHIFTS WESTWARD. THIS WILL ALLOW A FRONT TO MOVE INTO THE REGION TRIGGERING SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. WHILE A SEVERE STORM OR TWO CANNOT BE RULED OUT ON FRIDAY...NO WIDESPREAD SEVERE WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. VII
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
340 PM CDT THU AUG 5 2010
ARZ073-LAZ006-052115-
UNION-
340 PM CDT THU AUG 5 2010
...SIGNIFICANT WEATHER ADVISORY...
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 415 PM CDT...FOR THE FOLLOWING
COUNTIES AND PARISHES...
IN SOUTH CENTRAL ARKANSAS...
UNION...
IN NORTH CENTRAL LOUISIANA...
UNION...
INCLUDING THE FOLLOWING LOCATIONS...
HUTTIG AND LAPILE...
AT 335 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM NEAR HUTTIG. THIS STORM WAS NEARLY
STATIONARY.
DIME SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.The Shreveport radar (KSHV), 148 km away, was scanning. The volume nearest the first event began at 21:20 UTC.
9 thunderstorm wind. Local standard time, as filed.
Large tree limbs were downed on Hwy. 546 near Cheniere Lake.
Several trees were downed along with power outages in Monroe, Louisiana.
Trees and powerlines were downed on Landfill Road north northeast of Farmerville, Louisiana.
Several trees were downed on the northwest side of the parish.
Several trees were downed northeast of Choudrant, Louisiana.
Numerous trees were downed across the entire parish.
Multiple trees downed along Hwy. 507 northeast of Bienville, Louisiana.
Multiple trees and power lines downed on Hwy. 127 near Mount Olive.
An 18 wheeler ran into a downed tree on Hwy. 147 causing considerable damage to the truck. There were no injuries reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2010Every state in 2010This day in weather historyWarnings in Louisiana, August 2010
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: 238678, 238677, 238700, 238679, 238680, 238681, 238698, 238697, 238699.