Runoff from heavy rainfall produced areal flooding along the Big Nance Creek and nearby tributaries.
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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 HUN wrote it up.
Runoff from heavy rainfall produced areal flooding along the Big Nance Creek and nearby tributaries.
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 Apr 6, 5:53 AM CST, 1 hour 47 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HUNTSVILLE AL 653 AM CDT WED APR 6 2011 .UPDATE... UPDATE FOR 06/12Z AVIATION FORECAST. && .AVIATION... VFR CONDITIONS SHOULD PERSIST AT ALL NORTH ALABAMA TERMINALS THRU THE PERIOD...WITH AN INCREASING COVERAGE OF CI EXPECTED LATER TODAY. DEEP MIXING WILL ALLOW FOR GUSTY SSW FLOW /15G25 KNOTS/ THRU LATE AFTERNOON...WITH WINDS GRADUALLY DIMINISHING AND BACKING TO SSE OVERNIGHT. WITH GULF MOISTURE EXPECTED TO RETURN TO THE AREA RATHER QUICKLY OVERNIGHT...THERE IS SOME POTENTIAL FOR SCT/BKN STRATUS TO AFFECT HSV/MSL BY END OF THE FORECAST PERIOD...AND HAVE INDICATED THIS WITH SCT025. 70/DD && .PREV DISCUSSION... /ISSUED 250 AM CDT WED APR 6 2011/ DISCUSSION...QUIET AND TRANQUIL WX CONDITIONS PREVAIL ACROSS THE TN VALLEY THIS EARLY MORNING...AS A STRONG AREA OF HIGH PRESSURE DRIFTS EWD ACROSS THE SE REGION. EARLY MORNING TEMPS ARE RATHER COOL FOR THIS TIME OF THE YR...AIDED BY THE STRENGTH OF THE SFC HIGH COUPLED WITH WEAK CAA FROM YESTERDAY. THE COOL WX THOUGH WILL BE SHORT LIVED AS THE SFC HIGH BEGINS TO SHIFT MORE EWD AND INTO THE SRN ATLANTIC BASIN. A GRADUAL WARMING TREND WILL THEN BE UNDERWAY LATER TODAY AS RETURN FLOW DEVELOPS ACROSS THE REGION. TEMPS LATER TODAY WILL CLIMB CLOSER TO SEASONAL TRENDS...BEFORE CONTINUED WAA TRANSLATES TO EVEN WARMER CONDITIONS HEADING INTO THU. CLOUD COVER WILL ALSO BE ON THE INCREASE HEADING INTO THU AS GULF MOISTURE INCREASES ACROSS THE AREA. HEADING TOWARD THE END OF THE WORK WEEK...THE SFC HIGH WILL BECOME REINFORCED ACROSS THE SRN ATLANTIC BASIN...WITH CONTINUED WAA. WEAK UPPER RIDGING ALSO LOOKS TO DEVELOP ACROSS THE SE REGION STARTING FRI THEREBY ALLOWING OVERALL TEMPS TO CONTINUE GRADUALLY CLIMBING. WEAK EMBEDDED DISTURBANCES ARE ALSO XPCTED TO BEGIN TRAVERSING EWD ATOP THE UPPER RIDGE PATTERN...RESULTING IN A SLIGHT CHANCE FOR SHOWERS/TSTMS BEGINNING FRI. A GENERALLY UNSETTLED WX PATTERN IS XPCTED TO PREVAIL THROUGH MUCH OF THE WEEKEND PERIOD. ISOLATED SHOWERS/TSTMS ARE POSSIBLE THROUGH SUN...OR MAINLY ACROSS THE NRN HALF OF THE FORECAST AREA IN BETTER PROXIMITY TO PASSING UPPER DISTURBANCES. TEMPS THIS WEEKEND ARE XPCTED TO BE WELL ABOVE NORMAL...OR AS MUCH AS 10 TO 15 DEGREES ABOVE SEASONAL TRENDS IN SOME AREAS...REFERRING TO BOTH AFTERNOON HIGHS AND OVERNIGHT LOWS. THE LATTER HALF OF THE MORNING FORECAST PACKAGE IS WHERE THE MODELS CONTINUE TO DIVERGE ON THE DEVELOPING WX PATTERN ACROSS THE REGION. THE LATEST GFS CONTINUES TO BE FAIRLY AGGRESSIVE WITH ANOTHER POTENT SHRTWV PUSHING EWD THROUGH THE AREA LATE SUN/EARLY MON...WITH AN ATTENDANT COLD FRONT IN TOW. THIS WOULD ALSO SUGGEST ANOTHER ROUND OF ROBUST CONVECTION DEVELOPING ALONG/AHEAD OF THE SFC BOUNDARY. AS ALLUDED TO FROM THE AFTERNOON DISCUSSION TUE...STRONG EMBEDDED TSTMS LOOK POSSIBLE WITH ANY CONVECTION LATE SUN AND INTO MON. THE LATEST ECMWF ON THE OTHER HAND CONTINUES TO BE SLOWER AND SLIGHTLY LESS AMPLIFIED WITH THE UPPER FLOW PATTERN...AND SHOWS A FRONT POSSIBLY MOVING THROUGH THE AREA LATE IN THE DAY MON. FOR NOW...WILL MAINTAIN THE CURRENT FORECAST KEEPING CHANCE POPS SUN NIGHT AND MON...BEFORE DIMINISHING CLOUD COVER AND COOLER CONDITIONS RETURN MON NIGHT/TUE. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && AVIATION...70/DD PREV DISCUSSION...09
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HUNTSVILLE AL 501 AM CDT WED APR 6 2011 ALZ001>010-016-TNZ076-096-097-071000- LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN- MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN- 501 AM CDT WED APR 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. AN UPPER-LEVEL STORM SYSTEM PASSING WELL NORTH OF THE AREA WILL BRING A SLIGHT CHANCE OF THUNDERSTORMS TO PORTIONS OF SOUTHERN MIDDLE TENNESSEE LATE ON THURSDAY NIGHT...AND A SLIGHT CHANCE OF THUNDERSTORMS TO THE ENTIRE REGION ON FRIDAY. FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND LOCALLY HEAVY RAINFALL APPEAR TO BE THE MAIN THREATS AT THIS TIME. A SECOND AND MORE WIDESPREAD ROUND OF THUNDERSTORMS APPEARS LIKELY FOR THE TENNESSEE VALLEY FROM LATE SUNDAY NIGHT INTO MONDAY...AS A STRONGER STORM SYSTEM APPROACHES THE REGION FROM THE WEST. FORECASTED VALUES OF WIND SHEAR AND INSTABILITY SUPPORT A HIGHER THREAT FOR STRONG TO SEVERE THUNDERSTORMS DURING THIS PERIOD. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS NOT ANTICIPATED AT THIS TIME. 70/DD
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Several roads and low water crossing were flooded by Big Nance Creek, Town Creek and other smaller tributaries. A few cars attempted to cross the flooded roads were inundated. Time estimated.
Flooding along Town Creek prompted the closure of King Bridge Road and East 6th Street.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2011Every state in 2011This day in weather historyWarnings in Alabama, April 2011
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: 309117, 309118.