There was continuing rainy pattern that had been in place for a week or more. As is typical with very moist summer-time patterns, numerous nocturnal showers and thunderstorms had developed in the Mississippi Sound.
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.
There was continuing rainy pattern that had been in place for a week or more. As is typical with very moist summer-time patterns, numerous nocturnal showers and thunderstorms had developed in the Mississippi Sound. Those thunderstorms gradually moved inland into the Mississippi Gulf Coast and the heavy rainfall associated with those thunderstorms resulted in flash flooding in Moss Point.
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 10, 3:11 AM CST, 4 hours 36 minutes earlier.
Area Forecast Discussion
National Weather Service New Orleans LA
411 AM CDT Wed Aug 10 2022
.SHORT TERM (Today through Friday)...
At the risk of sounding repetitive, another day of high rain
chances is on tap for the area. Once again, these storms can
easily produce hourly rainfall rates that will be capable of
causing flooding issues. Short term models are consistent on
showing this activity likely beginning earlier than yesterday with
some heavy rainfall moving into the Mississippi coastal counties
around daybreak before filling in more across the area by the
afternoon hours. While it is very likely that some areas see heavy
rainfall, the somewhat chaotic setup to the rainfall has been
helping keep the problem areas to a minimum. That said, deep
tropical moisture associated with a tropical wave and persistent
onshore flow will surely keep the level of concern elevated. The
entire forecast area is outlooked for a slight risk of excessive
rainfall through today as storms that develop today could once
again easily produce rainfall rates of 2 to 3 inches per hour.
Much of the same is expected tomorrow as a boundary currently
situated over the southern Plains moves toward the area,
potentially helping to act as a focus for the rainfall should it
make enough progress. Once again the potential will certainly be
there for heavy rainfall with the locations being much harder to
pinpoint. The area is outlooked for a marginal risk of excessive
rainfall for tomorrow but could certainly be upgraded given
rainfall that occurs today. On that same note, held off on a flood
watch of any kind but that could be needed as well given rainfall
that occurs today.
In addition to the rainfall concerns, a coastal flood advisory
remains in effect through midday Thursday due to the persistent
onshore flow. This is mainly for issues that may develop during
the normal high tide periods.
.LONG TERM (Saturday and beyond)...
Persistent ridging over the central Rockies will slide slightly
east and south by the end of the week. This will place our area on
the eastern periphery bringing a period of northerly flow into
the area. Due to this, the focus for the shower and thunderstorm
activity over the weekend will shift somewhat from a heavy
rainfall threat to more strong storms with wind gust potential.
Rain chances should moderate back to more normal summertime
expectations as we move into next week as the ridge moves closer
to the area.
&&
.AVIATION...
Mostly VFR conditions across the area terminals this morning with
some occasional MVFR periods mainly due to low ceilings. Cannot
rule out the possibility of some lowering visibilities before
sunrise but so far it has not materialized. The most likely
locations would be at KMCB and KBTR. After daybreak, focus will
shift to showers and thunderstorm activity with all terminals
likely to see some impacts during the day.
&&
.MARINE...
Onshore flow will continue over the coastal waters through much of
the weekend with only a small reprieve on Saturday. This, in
combination with the spring tide is likely to cause some minor
coastal flooding issues and a coastal flood advisory remains in
effect through midday tomorrow. In addition, shower and
thunderstorm activity over the coastal waters will bring increased
winds and seas along with the possibility of waterspouts.
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 85 70 85 69 / 80 40 90 30
BTR 90 73 87 72 / 80 40 100 30
ASD 88 73 87 72 / 90 60 90 40
MSY 87 76 87 75 / 90 60 90 50
GPT 87 74 87 73 / 70 60 90 50
PQL 87 73 87 73 / 80 60 90 50
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Coastal Flood Advisory until 1 PM CDT Thursday for LAZ066>070-
076-078.
GM...None.
MS...Coastal Flood Advisory until 1 PM CDT Thursday for MSZ080>082.
GM...None.
&&The Mobile radar (KMOB), 41 km away, was scanning. The volume nearest the first event began at 13:49 UTC.
1 flash flood. Local standard time, as filed.
Multiple roads near 2nd street in Moss Point were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2022Every state in 2022This day in weather historyWarnings in Mississippi, August 2022
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: 1055200.