The combination of a sea breeze boundary, rich gulf moisture, and daytime heating allowed a few severe storms to develop during the afternoon and evening of the 12th.
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 JAN wrote it up.
The combination of a sea breeze boundary, rich gulf moisture, and daytime heating allowed a few severe storms to develop during the afternoon and evening of the 12th.
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 Jackson, MS wrote its last area forecast discussion before the first event at Aug 12, 2:30 PM CST, 1 hour 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSON MS 330 PM CDT MON AUG 12 2013 .SHORT TERM...TONIGHT THROUGH WEDNESDAY NIGHT...SURFACE ANALYSIS THIS AFTERNOON HAS A 1020MB HIGH CENTERED OVER THE NORTH CENTRAL GULF OF MEXICO WHICH HAS SHIFTED SOUTH FROM THE WEEKEND. RUC ANALYSIS STILL INDICATED A 594DAM RIDGE AXIS THAT HAS SHIFTED SOUTH FROM THE WEEKEND AS WELL...TO THE GULF COAST. THESE FEATURES WILL WEAKEN FURTHER OVER OUR CWA THROUGH THE SHORT TERM AS WE COME MORE UNDER THE INFLUENCE OF UPPER LEVEL TROUGHING AND A WEAK SURFACE FRONT. THIS WILL CONTINUE THE RECENT TREND OF SLIGHTLY COOLER TEMPERATURES AND GREATER RAIN CHANCES THROUGH WEDNESDAY NIGHT. THE SOUTHERN SHIFT OF THE RIDGES WERE RESULTING IN MORE OF A SOUTHWEST TO WEST LOW LEVEL FLOW TODAY THAT WAS HELPING MAINTAIN OUR +2IN PW AIRMASS. LOCAL RADARS SHOWED ISOLATED TO SCATTERED STORMS MOVING TO THE NORTHEAST OVER THE SOUTHEAST TWO THIRDS OF OUR AREA EARLY THIS AFTERNOON. COVERAGE IS EXPECTED TO BECOME MORE NUMEROUS BY LATE AFTERNOON. DUE TO THE SLOW MOVEMENT OF THE STORMS HEAVY RAINFALL CAN BE EXPECTED. AGAIN THIS EVENING WL SEE A DISTINCT DIURNAL TREND WITH THE CONVECTION AND MOST IT WL HAVE ENDED BY 9 PM. AFTERNOON WATER VAPOR IMAGERY SHOWED A SHORTWAVE DROPPING OUT OF CANADA AND OVER THE NORTHERN PLAINS. THIS AND SEVERAL OTHER SHORT WAVES WILL HELP DEEPEN AN UPPER LEVEL TROUGH OVER THE EASTERN CONUS THROUGH WEDNESDAY. THIS WL RESULT IN NORTHWEST FLOW ALOFT OVER OUR REGION TUESDAY THROUGH WEDNESDAY NIGHT. THIS WILL SUPPORT THE SOUTHWARD DRIFT OF A WEAK COLD FRONT INTO OUR CWA TUESDAY. THIS FRONTAL BOUNDARY WILL BECOME THE FOCUS FOR DAILY CONVECTION. COME TUESDAY AFTERNOON SCATTERED TO NUMEROUS STORMS ARE EXPECTED TO DEVELOP ACROSS OUR CWA. FORECAST SOUNDINGS SUGGEST A LITTLE MORE FAVORABLE POTENTIAL FOR A STRONG STORM OR TWO...ESPECIALLY ALONG THE HIGHWAY 82 CORRIDOR WHERE THE BOUNDARY IS EXPECTED. PWS WILL BE ABOVE TWO INCHES AND STORMS TRAINING ALONG AND AHEAD OF THE BOUNDARY WILL LIKELY PRODUCE HEAVY DOWNPOURS. MODELS ARE SHOWING POTENTIAL RAINFALL OF TWO TO FOUR INCHES ACROSS THE NORTH AND CENTRAL PORTIONS OF THE AREA FROM TUESDAY MORNING THROUGH WEDNESDAY NIGHT. THE GFS AND NAM WERE ALSO HINTING AT A POSSIBLE MCS DROPPING INTO OUR AREA FROM THE NORTHWEST EARLY WEDNESDAY MORNING. THE FRONT IS EXPECTED TO BE DRAPED ACROSS THE CWA FROM SOUTHEAST ARKANSAS TO EAST CENTRAL MISSISSIPPI. SOMEWHAT COOLER AND DRIER AIR WILL FILTER INTO OUR NORTHERN ZONES LOWERING RAINFALL CHANCES THERE. AS THE UPPER LEVEL TROUGH DEEPENS THROUGH WEDNESDAY NIGHT...A +1020MB HIGH WILL SETTLE FROM THE MID MISSISSIPPI AND OHIO VALLEYS PUSHING THE WEAK COLD FRONT SOUTH OF HIGHWAY 84 BY THURSDAY MORNING. THE PRECIPITATION DEVELOPMENT AND ASSOCIATED CLOUD COVER WILL MAKE TEMPERATURES A LITTLE DIFFICULT THROUGH THE PERIOD. THE 12Z GFS MOS HIGHS WERE AMONG THE HIGHEST ENSEMBLE MEMBERS AT MOST LOCATIONS TUESDAY. HAVE CUT HIGHS SEVERAL DEGREES ACROSS THE NORTH...CLOSER TO THE NAM MOS AND GFS ENSEMBLE MEANS. WITH THE COLD FRONT DROPPING ACROSS OUR SOUTHERN ZONES WEDNESDAY NIGHT...LOWER 60S LOOK REASONABLE IN THE NORTH THURSDAY MORNING. /22/ .LONG TERM...SOME DRIER AIR WILL PUSH INTO THE REGION FROM THE NORTH THURSDAY NIGHT INTO FRIDAY MORNING AS PWATS WILL BE FROM 1-1.5 INCHES. THIS WAS CONFIRMED BY AREA MODEL CROSS SECTIONS. WITH THE FRONT BEING STATIONARY ACROSS THE SOUTH...A SERIES OF WEAK DISTURBANCES WILL COME ACROSS THE REGION. THERE COULD BE A FEW STRONG STORMS DURING THE PERIOD NEAR THE DECAYING FRONTAL BOUNDARY. THIS WILL PROVIDE SOME CHANCE OF RAIN FOR THE REST OF THE PERIOD. WITH THE LOWER PWATS DO NOT SEE THE RISK OF LOCALLY HEAVY RAINFALL AT THIS TIME. THE UPPER TROUGH AXIS WILL DEVELOP OVER THE REGION FROM FRIDAY THROUGH THE WEEKEND. THIS WILL BRING SOME 60S DEWPOINTS AND TAKE A LITTLE HUMIDITY OUT OF THE AIR WITH THE SLIGHTLY MILDER DAYS AND COOLER NIGHTS. HIGHS AFTER THE FRONT WILL BE GENERALLY IN THE MID 80S TO LOWER 90S WITH LOWS BRINGING SOME NIGHT RELIEF OF READINGS IN THE 60S TO AROUND 70. THIS PATTERN MAY BRING SLIGHTLY BELOW NORMAL HIGHS AND LOWS FOR THIS TIME OF YEAR. AS FAR AS MODEL TEMPS ARE CONCERNED ON WEDNESDAY USED A BLEND OF COOLER EURO AND MEX TEMPS FOR HIGHS. THE EURO LOOKED TOO WARM ON NIGHTLY LOWS. SO WENT CLOSE TO MEX TEMPS. ON DAILY HIGHS AFTER WEDNESDAY WENT CLOSER TO SLIGHTLY WARMER MEX NUMBERS. AS FAR AS POPS ARE CONCERNED WENT CLOSE TO MEX NUMBERS ON WEDNESDAY INTO THURSDAY...WHICH WAS A LITTLE WETTER THAN THE EURO. FOR THE REST OF THE WEEK THE EURO POPS WERE RATHER DRY WITH THE STATIONARY FRONT AROUND SO WENT CLOSER TO WETTER MEX POPS./17/ && .AVIATION...VFR CONDITIONS ARE EXPECTED TO PREVAIL AT ALL TAF SITES THIS AFTERNOON HOURS AND CONTINUE INTO TONIGHT. SCATTERED CONVECTION IS DEVELOPING OVER THE AREA AND WILL CONTINUE TO TO DO SO...WHILE MOVING NORTHEAST...THROUGH THE REMAINDER OF THE AFTERNOON INTO THIS EVENING. SITES THAT OBSERVE CONVECTION WITHIN THEIR AERODROMES WILL LIKELY EXPERIENCE A BRIEF BOUT OF MVFR/IFR FLIGHT STATUSES DUE TO DEGRADED VISIBILITIES AND/OR CEILINGS. WIND GUSTS IN THE 21-30 KNOT RANGE ARE ALSO POSSIBLE WITH THE MOST INTENSE STORMS. SHOWERS AND STORMS WILL GRADUALLY DIMINISH THROUGH THE EVENING HOURS. VFR CONDITIONS ARE EXPECTED TO CONTINUE INTO TONIGHT. WINDS WILL ALSO SUBSIDE DURING THIS TIME...BECOMING LIGHT TO CALM OVERNIGHT INTO TUESDAY MORNING. PATCHY FOG AND LOW STRATUS WILL BE POSSIBLE AGAIN OVER MAINLY EAST AND SOUTHEAST MISSISSIPPI...KGTR... KMEI...AND KHBG. THIS COULD AGAIN REDUCE CEILINGS AND/OR VISIBILITIES TO MVFR/IFR STATUS AROUND SUNRISE TUESDAY. /19/ && .PRELIMINARY POINT TEMPS/POPS... JACKSON 73 92 73 89 / 30 63 64 71 MERIDIAN 73 92 72 90 / 35 65 58 73 VICKSBURG 73 93 72 89 / 26 58 66 67 HATTIESBURG 75 94 75 90 / 30 63 37 59 NATCHEZ 73 93 73 89 / 28 61 41 55 GREENVILLE 74 92 72 87 / 38 62 70 47 GREENWOOD 74 92 72 87 / 44 61 63 49 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...NONE. LA...NONE. AR...NONE. && 22/17/19
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 218 PM CDT MON AUG 12 2013 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 131930- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR- SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES- CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON- NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER- WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH- SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN- LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST- 218 PM CDT MON AUG 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TONIGHT AND TUESDAY... STRONG THUNDERSTORMS ARE POSSIBLE TUESDAY AFTERNOON AND EVENING. THE MOST INTENSE STORMS COULD CONTAIN WIND GUSTS OF 40 TO 50 MPH. LOCALLY HEAVY DOWNPOURS CAN ALSO BE ANTICIPATED WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH SUNDAY... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS IS NOT EXPECTED THROUGH NEXT SUNDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. 19
MSZ054-055-062-063-122215-
SIMPSON MS-LINCOLN MS-LAWRENCE MS-COPIAH MS-
448 PM CDT MON AUG 12 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
448 PM CDT MON AUG 12 2013
A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING 40 TO 50 MPH
WINDS WAS LOCATED FROM 3 MILES SOUTHEAST OF HOPEWELL TO 3 MILES
SOUTHWEST OF SONTAG AT 447 PM CDT...MOVING EAST AT 20 MPH.
VERY HEAVY RAIN ALONG WITH FREQUENT CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THESE STORMS.
PEOPLE IN EASTERN COPIAH...NORTHERN LAWRENCE...EXTREME NORTHEASTERN
LINCOLN AND WESTERN SIMPSON COUNTIES SHOULD MONITOR THESE STORMS
CLOSELY.
LAT...LON 3160 9025 3171 9024 3170 9026 3171 9033
3177 9031 3197 9030 3200 8996 3177 8996
3176 8997 3173 8997 3161 9001
TIME...MOT...LOC 2147Z 267DEG 16KT 3192 9016 3177 9016
3162 9021
JAThe national radar mosaic for the moment the first event began.
8 thunderstorm wind, 1 lightning. Local standard time, as filed.
A large tree was blown onto Mississippi Highway 35 North near the intersection with Mississippi Highway 13, damaging a vehicle.
Trees and power lines were blown down near William Warren and Earl Stucky Lane.
Trees and power lines were blown down near Sanford Scarborough Road.
Power lines were blown down on Highway 49.
Multiple trees were blown down near Laurel, as well as up near Moss.
Lightning struck a home on Little Sawmill Road. There was no serious damage to the house.
Trees were blown down on Mississippi Highway 528 east of Bay Springs and on County Road 9 west of Bay Springs.
A tree was blown onto a house.
Several trees were blown down in the Blackwater and Oak Grove communities. A tree was also blown down along Moscow Road northwest of Blackwater.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2013Every state in 2013This day in weather historyWarnings in Mississippi, August 2013
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: 467208, 467209, 467210, 467211, 467212, 467217, 467218, 467219, 467220.