A weak frontal boundary moved southeast into the area, with very heavy rainfall causing isolated flash flooding.
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 HUN wrote it up.
A weak frontal boundary moved southeast into the area, with very heavy rainfall causing isolated flash flooding.
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 Huntsville, AL wrote its last area forecast discussion before the first event at Aug 6, 5:52 AM CST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE HUNTSVILLE AL 652 AM CDT TUE AUG 6 2013 .UPDATE... FOR 12Z TAFS && .DISCUSSION... /ISSUED 315 AM CDT TUE AUG 6 2013/ A GRADUAL RETURN TO SOUTHERLY FLOW LATE IN THE EVENING ON MONDAY HELPED DEWPOINTS TO CLIMB BACK INTO THE UPPER 60S AND LOWER 70S...WHICH HAS LED TO A MILD NIGHT/EARLY MORNING ACROSS THE TN VALLEY. COMPARED TO LOWS LAST NIGHT IN THE MID TO UPPER 60S...TEMPERATURES HAVE ONLY COOLED INTO THE LOWER 70S TO UPPER 60S. ELSEWHERE...A COMPLEX OF THUNDERSTORMS THAT TRACKED ACROSS NE ARK IN THE LATE EVENING MONDAY CONTINUES TO WEAKEN INTO -RA AS IT SLIDES SSE ACROSS THE MEMPHIS METRO. THE TRAIN OF MCS ACTIVITY CONTINUES THOUGH WITH ANOTHER COMPLEX TRACKING ACROSS SOUTHERN MO ATTM. THE COMPLEX OF STORMS CURRENTLY OVER SOUTHERN MISSOURI WILL CONTINUE TO BE DRIVEN EASTWARD BY A MID LEVEL SHORTWAVE. WHILE THE PREVIOUS MCS TOOK A DIVE MORE SOUTHWARD DURING THE LATE NIGHT/EARLY MORNING HOURS TODAY...BULK SHEAR VECTORS AND MODIFICATION OF THE 500MB FLOW THROUGH TODAY SHOULD DRAW THIS NEXT SYSTEM A BIT MORE SOUTHEASTERLY. AM THEREFORE ANTICIPATING THAT THE WESTERN PORTION OF THE CWA WILL HAVE THE BEST CHANCE TO SEE SOME SHOWERS AND THUNDERSTORMS TODAY...WITH SPREAD OF STORMS EASTWARD ACROSS THE CWA POSSIBLE DEPENDING ON THE EXPANSION OF THE COLD POOL. THE LOW LEVEL POCKET OF DRY AIR THAT HELPED REDUCE POP CHCS YESTERDAY ACROSS THE TN VALLEY HAS ALSO MODIFIED (PER BMX AND OHX SOUNDINGS CAN SEE THAT IT HAS SHALLOWED AND MOISTENED OVER THE PAST 24HRS)...SO THIS HAS HELPED INCREASE CONFIDENCE IN MORE POPS THAN WE SAW YESTERDAY. WIDESPREAD HIGH/MID LEVEL CLOUD COVER AHEAD OF THIS SYSTEM SHOULD ALSO CONTINUE TO TRACK ACROSS THE CWA TODAY AND KEEP AFTERNOON MAX TEMPS NEAR THE MID 80S SEEN YESTERDAY (OR A COUPLE OF DEGREES WARMER DUE TO THE SOUTHERLY FLOW). IN FACT...WITH THE CLOUDS AND RAIN EXPECTED THROUGH THE END OF THE WEEK...KEPT WITH THE TREND TO UNDERCUT MOS GUIDANCE IN TERMS OF MAX TEMPS THROUGH THE END OF THE WORK WEEK. THE NEXT WEAK SHORTWAVE CURRENTLY OVER THE HIGH PLAINS SHOULD THEN BRING ANOTHER ROUND OF ENHANCED PRECIP CHCS TO THE CWA ON WEDNESDAY AFTERNOON. BUT THE BUILDING HIGH PRESSURE OVER THE SOUTHERN PLAINS SHOULD HELP SHIFT THIS ROUND OF STORMS SLIGHTLY FURTHER EASTWARD AS IT TRACKS TOWARD THE OHIO/TN VALLEYS. IT SHOULD BE NOTED THAT EACH ROUND OF STORMS EXPECTED THROUGH THE NEXT WEEK WILL BRING THE POTENTIAL FOR STRONG WINDS...FREQUENT LIGHTNING AND HEAVY DOWNPOURS LEADING TO FLASH FLOODING CONCERNS. DEWPOINTS WELL ABOVE 65 DEGREES...CAPE VALUES CLIMBING ABOVE 1500 J/KG EACH AFTERNOON AND PWATS ARND 1.8 TO 2+ INCHES SUGGEST THE POTENTIAL FOR STRONG TO SEVERE STORMS. NO SIGNIFICANT CHANGES HAVE BEEN MADE TO MUCH OF THE REMAINING FORECAST...WITH A NON-PROGRESSIVE 500MB PATTERN EXPECTED TO DOMINATE THE CONUS. AS NOTED IN THE AFD YESTERDAY MORNING THE BLOCKING OVER WESTERN CANADA AND BROAD RIDGING OVER THE SOUTHERN HALF OF THE CONUS WILL KEEP MUCH OF OUR WEATHER DOMINATED BY SHORTWAVES MOVING ACROSS THE SHALLOW TROF/NW FLOW. OFF AND ON RAIN CHANCES CAN THEREFORE BE EXPECTED FOR THE DURATION OF THE FORECAST...WITH TIMING DISCREPANCIES AMONG VARIOUS MODEL OUTPUT LEADING TO MORE GENERAL CHC POP CHANCES IN THE FCST. AFTERNOON AND EVENING POP CHANCES WILL STILL BE HIGHER THAN THE GENERAL FCST THOUGH...WITH WEAK BOUNDARIES MOVING ACROSS THE REGION AND SOME DIURNAL HEATING TAPPING INTO A MOISTURE RICH ATMOSPHERE. THE GOOD NEWS IS THAT ENOUGH MOISTURE IS EXPECTED TO REMAIN ACROSS THE REGION TO KEEP MOSTLY CLOUDY SKIES THRU MUCH OF THE FORECAST AND PREVENT A SIGNIFICANT ROUND OF HOT WEATHER. THURSDAY AND FRIDAY MAY BE THE WARMEST DAYS ACROSS THE CWA AS DEWPOINTS ARE EXPECTED TO CLIMB INTO THE LOWER/MID 70S AS MOISTURE POOLS AHEAD OF AN APPROACHING FRONTAL BOUNDARY. THE FRONT WILL BE SLOW MOVING AND LIKELY STALL NEAR THE TN VALLEY...LEADING TO POP CHCS CONTINUING THROUGH THE WEEKEND. CCC && .AVIATION... FOR 12Z TAFS...THE INITIAL BROKEN LINE OF SHRA/TSRA WITH AN OCCASIONAL TEMPO 4SM TSRA WAS MOVING THROUGH THE HSV TERMINAL AS OF TAF ISSUANCE. HAVE ADDED IN A TEMPO MVFR VISIBILITY UNTIL 13Z TO ACCOUNT FOR THIS TSRA ACTIVITY AT HSV. EXPECT ANOTHER AREA OF SHRA/TSRA ACTIVITY TO MOVE INTO THE TAF SITES BETWEEN THE 18Z AND 19Z TIME FRAME. THERE MAY BE A TEMPO 4SM/5SM TSRA TEMPO GROUPING WITH THE NEXT AREA OF SHRA/TSRA EXPECTED TO DEVELOP AND MOVE ACROSS THE AREA. THE MODELS ARE SIMILAR INVOLVING LESSENING SHRA/TSRA CHANCES AFTER 06Z...BUT WILL ADD IN A TEMPO MVFR FOG AT BOTH HSV AND MSL AFTER 09Z. TT && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WEATHER.GOV/HUNTSVILLE.
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE HUNTSVILLE AL 833 AM CDT TUE AUG 6 2013 ALZ001>010-016-TNZ076-096-097-071015- LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN- MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN- 833 AM CDT TUE AUG 6 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...REMAINDER OF TODAY AND TONIGHT... SEVERAL UPPER LEVEL DISTURBANCES WILL TRACK SOUTHEASTWARD ACROSS THE TENNESSEE VALLEY TODAY AND TONIGHT...BRINGING SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. A FEW STRONG STORMS PRODUCING FREQUENT LIGHTNING AND GUSTY WINDS OF 30 TO 40 MPH WILL BE POSSIBLE. HOWEVER...THE MOST SIGNIFICANT CONCERN WILL BE TORRENTIAL RAINFALL AND THE POTENTIAL FOR LOCALIZED FLASH FLOODING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... A SERIES OF UPPER LEVEL DISTURBANCES WILL CONTINUE TO MOVE SOUTHEAST INTO THE TENNESSEE VALLEY REGION THROUGH THE LATTER PART OF THE WEEK...WITH DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS EXPECTED ACROSS PORTIONS OF THE AREA. WITH THE CONTRIBUTION OF DAYTIME HEATING...THE BEST CHANCES OF STORMS WILL OCCUR DURING THE AFTERNOON AND EVENING HOURS EACH DAY. THE MAIN HAZARDS WITH ANY THUNDERSTORMS WILL BE LOCALLY HEAVY RAINFALL AND ISOLATED FLASH FLOODING...ALONG WITH BRIEF GUSTY WINDS AND FREQUENT LIGHTNING. .SPOTTER CALL TO ACTION STATEMENT... FORMAL ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS NOT ANTICIPATED AT THIS TIME. HOWEVER...TIMELY REPORTS OF HIGH WATER AND FLOODING WILL BE GREATLY APPRECIATED. 70/DD
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
719 AM CDT TUE AUG 6 2013
ALZ006-061300-
MADISON AL-
719 AM CDT TUE AUG 6 2013
...SIGNIFICANT WEATHER ADVISORY FOR MADISON COUNTY UNTIL 800 AM
CDT...
AT 719 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF STRONG THUNDERSTORMS FROM NEAR MADISON TO NEAR REDSTONE
ARSENAL...MOVING SOUTHEAST AT 25 MPH.
VERY HEAVY RAINFALL WITH AMOUNTS RANGING FROM ONE TO CLOSE TO TWO
INCHES WITHIN THE NEXT HOUR...FREQUENT LIGHTNING AND WIND GUSTS TO
AROUND 25 MPH WILL BE ASSOCIATED WITH THE AREA OF STORMS.
LOCATIONS IMPACTED INCLUDE...
HUNTSVILLE...MADISON...MOORES MILL...MERIDIANVILLE AND REDSTONE
ARSENAL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL OCCURRING WITH THESE STORMS MAY LEAD TO MINOR
FLOODING ON ROADS AND IN LOW LYING AREAS. DO NOT DRIVE YOUR VEHICLE
THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3493 8643 3462 8637 3458 8669 3459 8671
3477 8679 3481 8679 3496 8645
TIME...MOT...LOC 1211Z 300DEG 35KT 3468 8662
TTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
800 AM CDT TUE AUG 06 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0728 AM HEAVY RAIN 5 NW MERIDIANVILLE 34.90N 86.63W
08/06/2013 E2.00 INCH MADISON AL TRAINED SPOTTER
THREE TO FOUR INCHES OF RAIN COVERING MURPHY HILLS ROAD
JUST SOUTH OF GRIMWOOD ROAD.
&&
KWEBERPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
802 AM CDT TUE AUG 06 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0728 AM HEAVY RAIN 5 NW MERIDIANVILLE 34.90N 86.63W
08/06/2013 E2.00 INCH MADISON AL TRAINED SPOTTER
THREE TO FOUR INCHES OF WATER REPORTED OVER MURPHY HILLS
ROAD JUST SOUTH OF GRIMWOOD ROAD.
&&
KWEBERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
831 AM CDT TUE AUG 06 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0813 AM FLASH FLOOD 2 SW HUNTSVILLE 34.71N 86.61W
08/06/2013 MADISON AL BROADCAST MEDIA
SIX INCHES OF WATER REPORTED COVERING THE ROAD AT THE
INTERSECTION OF BOB WALLACE AND TRIANA BLVD SW.
&&
KWEBERSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
847 AM CDT TUE AUG 6 2013
ALZ006-008-061445-
MARSHALL AL-MADISON AL-
847 AM CDT TUE AUG 6 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MARSHALL AND
SOUTHEASTERN MADISON COUNTIES UNTIL 945 AM CDT...
AT 842 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS NEAR OWENS CROSSROADS...OR 12 MILES
SOUTHEAST OF HUNTSVILLE...MOVING SOUTHEAST AT 20 MPH.
HEAVY DOWNPOURS AND WIND GUSTS UP TO 30 MPH WILL BE POSSIBLE WITH
THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
NEW HOPE...OWENS CROSSROADS...GRANT AND UNION GROVE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING. LIGHTNING CAN STRIKE SEVERAL MILES AWAY FROM THE
PARENT THUNDERSTORM. SEEK SAFE SHELTER INSIDE A BUILDING OR VEHICLE.
HEAVY RAINFALL OCCURRING WITH THIS STORM MAY LEAD TO MINOR FLOODING
ON ROADS AND IN LOW LYING AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.
&&
LAT...LON 3432 8640 3454 8656 3454 8655 3456 8655
3458 8659 3461 8661 3474 8644 3468 8636
3463 8636 3460 8632 3460 8626 3451 8615
TIME...MOT...LOC 1342Z 310DEG 17KT 3459 8647
09The Northeast Alabama radar (KHTX), 54 km away, was scanning. The volume nearest the first event began at 14:31 UTC.
4 flash flood. Local standard time, as filed.
Between six inches and a foot of water was flowing across the road at the intersection of Bob Wallace and Triana Boulevard Southwest.
At least six inches of water was flowing down the edge of the road at the intersection of Guenevere Avenue Southeast and Camelot Drive Southeast.
Six inches of water was flowing across the road at the intersection of Laura Mae Lane and Mount Olive Road.
One foot of flowing water was reported to be across the underpass on Mitchell Boulevard near Highway 20.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2013Every state in 2013This day in weather historyWarnings in Alabama, 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: 472658, 472659, 472660, 472661.