Discrete thunderstorms in southeast Oklahoma congealed into a mesoscale convective complex as they moved southeast into northern Louisiana early morning of May 9th. The system consisted of clusters and linear segments moving rapidly eastward, while localized cell mergers and brief training occurred within the broader complex.
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.
Discrete thunderstorms in southeast Oklahoma congealed into a mesoscale convective complex as they moved southeast into northern Louisiana early morning of May 9th. The system consisted of clusters and linear segments moving rapidly eastward, while localized cell mergers and brief training occurred within the broader complex. The storms produced widespread damaging winds from storms over coastal Mississippi.
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 May 8, 11:40 PM CST, 5 hours earlier. Its key messages:
Area Forecast Discussion National Weather Service New Orleans LA 1240 AM CDT Sat May 9 2026 ...New SHORT TERM, LONG TERM, AVIATION, MARINE... .KEY MESSAGES... Updated at 1230 AM CDT Sat May 9 2026 - An active weather pattern will continue through the weekend with several rounds of showers and thunderstorms in the forecast. - The main concern will be potential for locally heavy rainfall, especially today. High rainfall rates in some storms will be capable of overwhelming drainage capacity and leading to ponding of water in low lying and poor drainage areas, with the heaviest storms potentially leading to isolated flash flooding. While severe weather is a less likely threat, one or two strong to severe storms cannot be ruled out. IF any storms become severe, the main threats will be damaging wind gusts and hail. - Residents should remain weather-aware through the weekend and plan ahead for potential street flooding - especially if normal commuting routes include flood-prone underpasses and other poor drainage spots. && .SHORT TERM... (Now through Monday) Issued at 1230 AM CDT Sat May 9 2026 Upper features at late evening included a trough from southern Missouri into west Texas, with ridging over the desert Southwest. A strong shortwave was moving into Idaho and Montana. At the surface, a stationary boundary was off the Louisiana coast, and another from the Ohio Valley to Oklahoma to west Texas. High pressure was off the Carolina coast. Isolated showers and thunderstorms were occurring along the Interstate 10/12 corridor from Slidell to near Opelousas. Temperatures were in the upper 60s and lower 70s. The scattered to locally numerous showers should continue overnight. What seems to be fairly consistent is that another disturbance will race through the local area during the daytime hours, leading to yet another round of widespread showers and storms, especially along/north of the interstate corridor. With precipitable water values near 1.9 inches, efficient rainfall in some of these storms will continue to lead to at least an isolated flash flood threat. We will have a Slight Risk of excessive rainfall across much of the area today. Going into Sunday it'll be more of the same. Another fast-moving disturbance will move through the local area some time Sunday/Sunday night, forcing a cold front through the area with another round of showers and storms accompanying it. This activity currently looks to remain a bit more progressive, which should help limit the flash flood threat. The global models have slowed the timing of the trough passage down somewhat, so that precipitation could linger into the daytime hours Monday before departing. It might be late in the day before clearing occurs, which would hold high temperatures down a bit. && .LONG TERM... (Monday night through Friday) Issued at 1230 AM CDT Sat May 9 2026 All of the long term guidance remains in good agreement that a deep layer northwesterly flow regime and strong riding in the low to mid levels will remain in place through the end of the week. Ample subsidence and dry air advection into the area will keep a strong mid-level capping inversion in place through the week, and this will help limit cloud development each day. At most, some fair weather cumulus will develop beneath the inversion as temperatures warm into the low to mid 80s each afternoon. The dry airmass in place will also allow for a large diurnal range of around 30 degrees early in the week. Overnight lows will easily fall into the low to mid 50s over inland areas the lower 60s along the Louisiana coast both Monday and Tuesday night. Some gradual modification of overnight lows will occur later in the week as low level moisture slowly increases. However, lows will still cool a good 20 degrees into the low to mid 60s each night. Overall, a very pleasant stretch of weather is expected for the upcoming workweek. && .AVIATION... (06Z TAFS) Issued at 1230 AM CDT Sat May 9 2026 A stationary front will continue to linger near the area for much of the day. Periods of shower and thunderstorm activity will continue for the remainder of the night, but may stay north of KHUM, KNEW and KMSY. IFR conditions with visibilities of 1 to 2 miles and ceilings of 300 to 800 feet can be expected with the heaviest storms. Outside of the convective threat, prevailing MVFR ceilings of 1000 to 2000 can be expected at the terminals through the daytime hours, with some potential to improve to VFR, at least temporarily, beyond 00z Sunday. && .MARINE... Issued at 1230 AM CDT Sat May 9 2026 Winds have been a bit more easterly over the coastal waters this evening with the stationary front off the Louisiana coast straddling our coastal waters. As the boundary moves northward later today, winds will again become south to southeast winds at 10 to 15 knots, and will persist through the weekend. Another frontal boundary will move into the waters Sunday night into Monday morning, bringing offshore winds to the waters for early next week. Winds should remain below headline criteria through the period, with the greatest concern being scattered to numerous showers and storms, mainly today through Sunday night or Monday morning. && .LIX WATCHES/WARNINGS/ADVISORIES... LA...None. GM...None. MS...None. GM...None. && SHORT TERM...RW LONG TERM....PG AVIATION...RW MARINE...RW
Special Weather Statement
National Weather Service New Orleans LA
101 AM CDT Sat May 9 2026
MSZ086-090630-
Southern Hancock MS-
101 AM CDT Sat May 9 2026
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHERN HANCOCK
COUNTY THROUGH 130 AM CDT
...
At 101 AM CDT, Doppler radar was tracking a strong thunderstorm near
Stennis Space Center, or 11 miles west of Diamondhead, moving east at
30 mph.
HAZARD...Winds in excess of 40 mph and pea to half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Bay St. Louis, Waveland, Diamondhead, Shoreline Park, Stennis Space
Center, and Kiln.
This includes Interstate 10 in Mississippi between mile markers 1 and
18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3026 8936 3030 8964 3031 8963 3041 8962
3042 8953 3040 8934 3037 8934 3037 8932
3036 8933 3031 8930
TIME...MOT...LOC 0601Z 277DEG 27KT 3036 8955
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
KLGSpecial Weather Statement
National Weather Service New Orleans LA
128 AM CDT Sat May 9 2026
LAZ034-046>048-090700-
Iberville LA-Pointe Coupee LA-West Baton Rouge LA-
East Baton Rouge LA-
128 AM CDT Sat May 9 2026
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF WEST BATON ROUGE,
SOUTHEASTERN POINTE COUPEE, NORTHWESTERN IBERVILLE AND NORTHWESTERN
EAST BATON ROUGE PARISHES THROUGH 200 AM CDT
...
At 127 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Erwinville to near Maringouin. Movement
was east at 35 mph.
HAZARD...Winds in excess of 40 mph and nickel to penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Baton Rouge, Zachary, Baker, Port Allen, Brusly, Livonia, Maringouin,
Rosedale, Grosse Tete, Merrydale, Erwinville, Central, Brownfields,
and Baton Rouge Airport.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 138 and 154.
Interstate 110 in Louisiana between mile markers 1 and 8.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3062 9101 3054 9102 3039 9128 3043 9163
3052 9162 3064 9135
TIME...MOT...LOC 0627Z 281DEG 28KT 3059 9136 3047 9157
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
KLGSpecial Weather Statement
National Weather Service New Orleans LA
143 AM CDT Sat May 9 2026
MSZ087-090700-
Southern Harrison MS-
143 AM CDT Sat May 9 2026
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
HARRISON COUNTY THROUGH 200 AM CDT
...
At 143 AM CDT, Doppler radar was tracking a strong thunderstorm over
Long Beach, moving east at 35 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Gulfport, Biloxi, Long Beach, and Gulfport Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3038 8884 3037 8886 3036 8901 3030 8920
3039 8918 3041 8913 3042 8899
TIME...MOT...LOC 0643Z 274DEG 32KT 3037 8912
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
KLGSpecial Weather Statement
National Weather Service New Orleans LA
359 AM CDT Sat May 9 2026
LAZ076>080-MSZ086-090930-
Southeast St. Tammany LA-Western Orleans LA-Eastern Orleans LA-
Northern St. Tammany LA-Southwestern St. Tammany LA-
Southern Hancock MS-
359 AM CDT Sat May 9 2026
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF ORLEANS, SOUTHEASTERN
ST. TAMMANY PARISHES IN SOUTHEASTERN LOUISIANA AND SOUTHERN HANCOCK
COUNTIES THROUGH 430 AM CDT
...
At 359 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from near Pearlington to 6 miles
southeast of Lacombe to 9 miles northwest of New Orleans. Movement
was east at 35 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
New Orleans, Slidell, Bay St. Louis, Waveland, East New Orleans, Lake
Catherine, Pearlington, Shoreline Park, and Lakefront Airport.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 242 and 255, and
between mile markers 259 and 273.
Interstate 10 in Mississippi between mile markers 1 and 8.
Interstate 510 between mile markers 1 and 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3024 8940 3017 8943 3013 8961 3003 8970
3001 8975 3002 8981 2999 8983 3002 9002
3006 9008 3007 9001 3017 8989 3014 8982
3017 8977 3022 8986 3024 8996 3035 8963
3032 8930
TIME...MOT...LOC 0859Z 280DEG 32KT 3032 8963 3023 8988 3017 9004
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPHSpecial Weather Statement
National Weather Service New Orleans LA
436 AM CDT Sat May 9 2026
MSZ068-069-091000-
Wilkinson MS-Amite MS-
436 AM CDT Sat May 9 2026
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
WILKINSON AND SOUTHERN AMITE COUNTIES THROUGH 500 AM CDT
...
At 436 AM CDT, Doppler radar was tracking a strong thunderstorm near
Centreville, or 13 miles north of Clinton, moving east at 30 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Liberty, Centreville, and Gillsburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3100 9110 3112 9112 3126 9071 3100 9063
TIME...MOT...LOC 0936Z 254DEG 25KT 3106 9101
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPHSpecial Weather Statement
National Weather Service New Orleans LA
440 AM CDT Sat May 9 2026
MSZ068-069-091015-
Wilkinson MS-Amite MS-
440 AM CDT Sat May 9 2026
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN
WILKINSON AND NORTHERN AMITE COUNTIES THROUGH 515 AM CDT
...
At 440 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Dolorosa, or 22 miles southeast of Natchez, moving
east at 45 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Liberty, Gloster, Smithdale, Dolorosa, and Crosby.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3135 9121 3134 9115 3132 9112 3134 9106
3133 9106 3133 9103 3135 9102 3133 9099
3135 9098 3135 9062 3110 9062 3118 9139
3134 9138 3137 9122
TIME...MOT...LOC 0940Z 273DEG 40KT 3126 9124
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPHThe Hammond radar (KHDC), 64 km away, was scanning. The volume nearest the first event began at 10:42 UTC.
9 thunderstorm wind. Local standard time, as filed.
Powerline downed by thunderstorm winds along Pleasant Springs Road in Magnolia.
Social media comment reported tree downed by thunderstorm winds along Caesar Road northeast of Picayune.
Tree downed on Diamondhead Dr E near Veterans.
Tree downed on Diamondhead Dr East.
A tree was uprooted in Diamondhead.
Social media post showed a tree downed by thunderstorm winds in Kiln.
Tree downed at Bridges Golf Club.
Roof damage reported at Our Lady of The Gulf Church.
Tree downed north side of Pass Christian.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2026Every state in 2026This day in weather historyWarnings in Mississippi, May 2026
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: 1343607, 1343606, 1343604, 1343599, 1343603, 1343598, 1343596, 1343594, 1343593.