An approaching cold front and a strong upper air disturbance moving across the region resulted in the development of numeorus thunderstorms. A few of the storms were strong to severe.
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 LIX wrote it up.
An approaching cold front and a strong upper air disturbance moving across the region resulted in the development of numeorus thunderstorms. A few of the storms were strong to severe.
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 New Orleans, LA wrote its last area forecast discussion before the first event at Aug 21, 11:35 AM CST, 1 hour 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 1235 PM CDT FRI AUG 21 2009 .AVIATION... WIDESPREAD THUNDERSTORMS HAVE DEVELOPED ACROSS THE ENTIRE AREA. MOD TO SVR TB WILL BE POSSIBLE NEAR STRONGER THUNDERSTORMS. OTHERWISE...FREQUENT LIGHTNING...HEAVY RAIN AND GUSTY WINDS TO 25KTS CAN BE EXPECTED AT THE SFC. CIG SHOULD ONLY DROP TO MVFR LEVELS BUT COULD SEE VIS DROP TO LIFR FOR SHORT PERIODS. MOST OF THIS ACTIVITY SHOULD DISSIPATE THIS EVENING. VFR IS EXPECTED OVERNIGHT AT ALL TERMINALS WITH THE EXCEPTION OF MCB WHICH WILL LIKE BE IMPACTED BY MVFR TO HIGH IFR VIS OVERNIGHT. AN APPROACHING COLD FRONT SAT MORNING WILL RESULT IN VEERING WINDS TO THE WEST AND EVENTUALLY NORTH LATER IN THE MORNING AS THE BOUNDARY MOVES THROUGH. VFR WILL PREVAIL AT ALL SITES SATURDAY. MEFFER && .PREV DISCUSSION... /ISSUED 1105 AM CDT FRI AUG 21 2009/ UPDATE... MORNING SOUNDING SHOWED A TRIGGER TEMPERATURES OF 87 DEGREES AND RADAR SHOWED RAPID DEVELOPMENT OF NUMEROUS SHOWERS AND THUNDERSTORMS OVER A LARGE PORTION OF THE FORECAST AREA AS TEMPERATURES WARM INTO THE UPPER 80S. ONLY CHANGES TO THE GRIDS WAS TO ADD MENTION OF GUSTY WINDS AND LOCALLY HEAVY RAINFALL THROUGH EARLY EVENING. SPC DAY ONE CONVECTIVE OUTLOOK SHOWS THE ENTIRE AREA IN A 5 PERCENT PROBABILITY FOR SEVERE CONVECTIVE WIND GUSTS. FORECAST CORFIDI VECTORS LATE THIS AFTERNOON SHOW THE POTENTIAL FOR REGENERATIVE/BACK-BUILDING ACTIVITY THAT WOULD FAVOR LOCALLY VERY HEAVY RAINFALL AMOUNTS. OTHERWISE...TIMING OF COLD FRONT AND DRY AIR LOOK ABOUT THE SAME AS EARLIER INDICATED. 22/TD PREV DISCUSSION... /ISSUED 803 AM CDT FRI AUG 21 2009/ UPDATE... .SOUNDING DISCUSSION... ANOTHER SATURATED AND UNSTABLE SOUNDING THIS MORNING WITH A PRECIPITABLE WATER VALUE OF 2.39 INCHES AND A LIFTED INDEX VALUE OF -9.9. SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPED OVER THE COASTAL WATERS BEFORE SUNRISE AND WIDESPREAD SHOWERS AND THUNDERSTORMS INLAND ARE EXPECTED TO DEVELOP AS DAYTIME HEATING OCCURS. AGAIN TODAY...HEAVY RAIN IN A SHORT PERIOD OF TIME IS THE PRIMARY THREAT. A SURFACE INVERSION IS PRESENT ALONG WITH WESTERLY WINDS THROUGHOUT THE ATMOSPHERE. PREV DISCUSSION... /ISSUED 406 AM CDT FRI AUG 21 2009/ COLD FRONT TO MOVE THROUGH TONIGHT... SHORT TERM...IT SHOULD BE AN ACTIVE DAY TODAY WITH WIDESPREAD SHRA AND TSRA BEGINNING THIS MORNING AND PERSISTING OFF AND ON THROUGH THE DAY AND INTO THE OVERNIGHT HRS AS A COLD FRONT MOVES THROUGH. BY 7Z THE COLD FRONT WAS STRETCHING SW FROM THE U.P. THROUGH THE MID MS VALLEY AND INTO THE ARKLATEX. CONVECTION WAS STILL OCCURRING ALONG THE FRONT IN SERN ARK AND BACK INTO NERN TX. TODAY AND TONIGHT...THE COLD FRONT WILL CONTINUE TO MOVE SE WHILE THE MID LVL FLOW CONTINUES TO TRANSITION FROM WRLY TO NWRLY. THE STRONG DISTURBANCE WHICH IS CURRENTLY MOVING THROUGH THE RED RIVER VALLEY HAS BASICALLY BROKEN OFF INTO TWO PIECES. THE FIRST IS ASSOCIATED WITH THE NERN TX CONVECTION AND IS PUSHING SOUTH. OTHER IS MOVING TO THE EAST TWRDS THE TN VALLEY. THAT SAID THE ANOTHER DISTURBANCE IS JUST BEHIND AND THIS WILL CONTINUE TO PUSH SE MOVING INTO THE CWA LATER THIS MORNING/MIDDAY. WITH ABUNDANT MOISTURE STILL IN PLACE CONVECTION SHOULD BECOME WIDESPREAD...AT LEAST ACROSS THE NRN HALF OF THE CWA NO LATER THAN MIDDAY AS THE COMBINED EFFECTS OF THE DISTURBANCE AND APPROACHING COLD FRONT MOVE INTO THE CWA. THAT SAID CONVECTION IS ALREADY DEVELOPING ACROSS THE COASTAL WATERS THIS MORNING AND AS HGHTS CONTINUE TO FALL WITH THE SHARPENING L/W TROUGH ACROSS THE ERN CONUS THIS CONVECTION COULD QUICKLY INCREASE IN COVERAGE AND EXPAND NORTH. AS FOR STRONG/SVR STORMS NOT TOO MUCH HAS CHANGED IN THE THINKING AND AGREE WITH THE PREVIOUS FCSTER THAT THERE IS STILL THE POSSIBILITY OF STRONG TO ISLTD PULSE SVR STORMS. WE WILL BE UNSTABLE AND AS THE L/W TROUGH SHARPENS WE WILL MOVE UNDER THE RRQ OF THE UPPER JET THIS AFTN INCREASING THE LIFT/ULL DIVERGENCE. THE FRONT WILL ADD A LITTLE MORE FORCING WHICH SHOULD ENHANCE A FEW STORMS ALLOWING THEM TO APPROACH STRONG/SVR LIMITS. IF ANY STRONG/SVR STORM DEVELOPS THE MAIN CONCERN WILL BE GUSTY TO DAMAGING WINDS ALONG WITH FREQUENT TO CONTINUOUS LIGHTNING. ONE CAVEAT...CONVECTION IS FIRING OFF A LITTLE MORE QUICKLY ACROSS THE COASTAL WATERS THIS MORNING AND IF CONVECTION BECOMES WIDESPREAD PRETTY FAST THIS MORNING THIS WILL KEEP US FROM GETTING TOO UNSTABLE AND REALLY KEEP THE STRONG/SVR RISK IN CHECK. THE FRONT WILL CONTINUE TO PUSH THROUGH THE CWA OVERNIGHT APPROACHING THE COASTAL WATERS BY SUNRISE WITH RAIN COMING TO AN END AFTER FRONTAL PASSAGE. THROUGH THE WEEKEND...THE FRONT WILL CONTINUE TO SLOWLY PUSH SOUTH THROUGH THE NRN GULF SAT WITH ANY ACTIVITY CONFINED TO THE COASTAL WATERS MAINLY DURING THE MORNING HRS. BY SAT AFTN MUCH DRIER AND SLIGHTLY COOLER AIR WILL START TO FILTER IN FROM THE NORTH AND THIS SHOULD SET THE STAGE FOR WHAT SHOULD BE A NICE COUPLE OF DAYS BY AUG STANDARDS. TEMPS ON SAT WILL STILL BE NEAR NORMAL BUT BY SUN MORNING MUCH LOWER DEWPOINTS AND EVEN COOLER LL TEMPS WILL ALLOW LOWS TO FALL BACK INTO THE 60S ACROSS THE NRN HALF OF THE CWA. AS FOR HIGHS SUN...H925 TEMPS WILL DROP ALL THE WAY TO 20-21C AND THIS WOULD NORMALLY ONLY SUGGEST MID 80S BUT THIS IS MID AUG AND WITH BASICALLY FULL SUN EXPECTED I WILL KEEP HIGHS MAINLY IN THE UPPER 80S...WHICH BASICALLY AGREES WITH THE MAV. /CAB/ LONG TERM...MDLS SHOWING PRETTY GOOD CONSISTENCY AND CONTINUITY WITH THE EXTENDED. THE L/W TROUGH LOOKS LIKE IT WILL PUSH EAST OFF THE ERN SEABOARD/FLATTEN OUT BY TUE WITH A PIECE OF IT BEING DISPLACED OVER THE SERN CONUS/NRN GULF. AS THE PREVIOUS FCSTER MENTIONED BOTH THAT FEATURE AND A LINGERING BNDRY IN THE GULF THIS TIME OF THE YEAR COULD LEAD TO SOME DEVELOPMENT IN THE GULF. NOTHING IS EXPECTED YET BUT WE WILL NEED TO KEEP AN EYE OUT. THE BIGGEST SHIFT IN THE EXTENDED IS THE MDLS BASICALLY KEEPING US DRY FOR THE MOST PART BUT I WILL KEEP SLIGHT CHC IN THE FCST BEGINNING WED. MOISTURE DOES START TO INCREASE BY MID/LATE WEEK AND THIS SHOULD ALLOW ISLTD CONVECTION TO RETURN BUT OVERALL THINGS SHOULD REMAIN QUIET THROUGH AT LEAST TUE AND POSSIBLY INTO WED. MON AND TUE WILL CONTINUE TO FEEL COMFORTABLE. TEMPS WILL BE JUST BELOW NORMAL BUT ON WED WE SHOULD BE BACK AROUND NORMAL AS BOTH LL MOISTURE/TEMPS SLOWLY INCREASE. THE BIGGEST DEVIATIONS TO GUI WERE MORNING LOWS MON AND TUE WHICH I WENT A FEW DEGREES BELOW THE MEX ACROSS THE NRN HALF OF THE CWA...ESPECIALLY THE PEARL RIVER AND PASCAGOULA DRAINAGE AREAS WHERE TEMPS MAY BE ABLE TO DROP A FEW EXTRA DEGREES. AGAIN WE WILL MONITOR THE GULF FOR ANY DEVELOPMENT. LOW PRESSURE DEVELOPMENT ALONG A DECAYING BNDRY IN THE GULF OCCASIONALLY HAPPENS AND WITH TODAYS FRONT EXPECTED TO STALL OUT OVER THE GULF EARLY NEXT WEEK...SLOW DEVELOPMENT MAY OCCUR AROUND THE MIDDLE OF THE WORK WEEK. /CAB/ AVIATION... KMCB EARLIER HAD VLIFR FOR ABOUT AN HOUR...BUT HAS SINCE RETURNED TO VFR. CANNOT RULE OUT THOSE CONDITIONS RETURNING FOR A TIME AROUND SUNRISE. OTHERWISE...ONE MORE DAY OF WIDESPREAD CONVECTION TO AFFECT THE AREA TERMINALS. AS HAS BEEN THE CASE OVER THE LAST SEVERAL DAYS...KMSY AND KGPT LIKELY TO BE AFFECTED BY TSRA AS EARLY AS 15Z. KBTR AND KMCB CLOSER TO 17Z OR 18Z. AGAIN...MOST OR ALL CONVECTION WILL DISSIPATE CLOSE TO SUNSET. WINDS WILL COME AROUND TO NORTHWEST OVERNIGHT FRIDAY NIGHT...AND NOT ANTICIPATING ANY MAJOR FOG ISSUES AT THIS TIME. 35 MARINE... A REPEAT OF THE CONVECTIVE SCENARIO TODAY BEFORE THE COLD FRONT APPROACHES THE COASTAL WATERS TONIGHT. WE WILL HAVE TO MONITOR WINDS BEHIND FRONTAL PASSAGE...AS LOW LEVEL TEMPERATURE AND WIND FORECASTS INDICATE WE MAY APPROACH EXERCISE CAUTION LEVELS...PROBABLY SATURDAY NIGHT. HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT AND NORTHERLY WINDS WILL PERSIST THROUGH MONDAY. SOUTHERLY FLOW IS EXPECTED TO RETURN TUESDAY AS SFC RIDGE MOVES TO THE EAST COAST. 35 && .PRELIMINARY POINT TEMPS/POPS... MCB 70 90 61 88 / 30 0 0 0 BTR 73 91 65 88 / 30 10 10 0 MSY 76 91 74 88 / 30 10 10 0 GPT 74 90 68 87 / 40 10 0 0 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1138 AM CDT FRI AUG 21 2009 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-221100- LAKE PONTCHARTRAIN AND LAKE MAUREPAS- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA- EAST FELICIANA-ST. HELENA-TANGIPAHOA-WASHINGTON-ST. TAMMANY- IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON- ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE- ST. CHARLES-UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES- UPPER ST. BERNARD-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE-LOWER JEFFERSON-LOWER PLAQUEMINES- LOWER ST. BERNARD-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER- HANCOCK-HARRISON-JACKSON- 1138 AM CDT FRI AUG 21 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...THIS AFTERNOON AND TONIGHT NUMEROUS THUNDERSTORMS...AND ISOLATED STRONG TO MARGINALLY SEVERE STORMS ARE EXPECTED THROUGH THIS EVENING IN ADVANCE OF A COLD FRONT THAT WILL BE MOVING ACROSS THE OUTLOOK AREA FROM THE NORTHWEST TONIGHT AND SATURDAY MORNING. THE PRIMARY THREAT WILL BE GUSTY TO DAMAGING WIND GUSTS AND FREQUENT TO CONTINUOUS LIGHTNING. THERE IS ALSO A RISK OF TORRENTIAL DOWNPOURS WHICH COULD LEAD TO RAINFALL AMOUNTS OF UP TO TWO INCHES. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS IS NOT ANTICIPATED THROUGH THURSDAY...AUGUST 27TH. 22/TD
LAZ066-067-211800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1200 PM CDT FRI AUG 21 2009 ...CLUSTER OF STRONG THUNDERSTORMS MOVING EAST AFFECTING LAFOURCHE PARISH...TERREBONNE PARISH... AT 1159 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS 9 MILES SOUTH OF HOUMA...OR ABOUT 5 MILES NORTH OF DULAC...MOVING EAST AT 15 MPH. THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...CHAUVIN AND MONTEGUT THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
LAZ064-070-211900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1254 PM CDT FRI AUG 21 2009 ...STRONG THUNDERSTORM MOVING EAST AFFECTING ST. BERNARD PARISH... AT 1254 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 12 MILES EAST OF CHALMETTE...OR ABOUT 6 MILES NORTHWEST OF YSCLOSKEY...MOVING EAST AT 10 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...YSCLOSKEY THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
LAZ057>060-211900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 100 PM CDT FRI AUG 21 2009 ...STRONG THUNDERSTORM MOVING EAST AFFECTING ST. JOHN THE BAPTIST PARISH...ST. CHARLES PARISH...ST. JAMES PARISH...LAFOURCHE PARISH... AT 1259 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 7 MILES NORTHEAST OF THIBODAUX...MOVING EAST AT 15 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND... DESTREHAN...DES ALLEMANDS AND BOUTTE THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND WIND GUSTS 40 TO 50 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
LAZ040-211900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 113 PM CDT FRI AUG 21 2009 ...CLUSTER OF STRONG THUNDERSTORMS MOVING EAST AFFECTING ST. TAMMANY PARISH... AT 112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS 12 MILES NORTHEAST OF COVINGTON...OR ABOUT 3 MILES SOUTHWEST OF BUSH...MOVING EAST AT 15 MPH. THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...SUN AND BUSH THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND GUSTS 40 TO 50 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.
LAZ056-057-211915- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 120 PM CDT FRI AUG 21 2009 ...STRONG THUNDERSTORM MOVING EAST AFFECTING ASSUMPTION PARISH...ST. JAMES PARISH... AT 119 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 7 MILES NORTHEAST OF NAPOLEONVILLE...OR ABOUT 6 MILES WEST OF CONVENT...MOVING EAST AT 15 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...CONVENT... LUTCHER AND GRAMERCY THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.
LAZ038-050-058-211900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 121 PM CDT FRI AUG 21 2009 ...STRONG THUNDERSTORM MOVING EAST AFFECTING LIVINGSTON PARISH... TANGIPAHOA PARISH...ST. JOHN THE BAPTIST PARISH... AT 119 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 15 MILES SOUTHWEST OF HAMMOND...OR ABOUT OVER KILLIAN...MOVING EAST AT 15 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...KILLIAN AND SPRINGFIELD THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.
The national radar mosaic for the moment the first event began.
2 lightning, 1 thunderstorm wind. Local standard time, as filed.
A tree was blown down on top of an unoccupied van.
Two vehicles were struck by lightning with one strike resulting in a minor fire. Three homes were struck by lightning with one resulting in a fire.
A lightning strike caused a fire on a shrimp boat.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2009Every state in 2009This day in weather historyWarnings in Louisiana, August 2009
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: 195516, 195517, 195521.