A weak warm front that developed the previous day stalled and began to sag southward towards the Mississippi Coast. At the same time, a very moisture rich atmosphere was already in place as it had been for several days.
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.
A weak warm front that developed the previous day stalled and began to sag southward towards the Mississippi Coast. At the same time, a very moisture rich atmosphere was already in place as it had been for several days. As storms developed within this conducive environment, daytime heating began to intensify storms moving towards the Mississippi Gulf Coast. Those storms produced very heavy rainfall rates that resulted in flash flooding over portions of Jackson and Harrison counties.
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 25, 3:05 AM CST, 9 hours 18 minutes earlier.
Area Forecast Discussion
National Weather Service New Orleans LA
405 AM CDT Thu Aug 25 2022
.SHORT TERM (Today through Saturday)... Will be going up with a
flash flood watch for today. This will not be as much of an areawide
distribution but moreso a rate driven event. Some of the
thunderstorms today could be in or around 4" per hour rates over
already saturated grounds. This would cause some areas to flood
easily within a short period. PW values are still north of 2" and
covective trigger temps are still matching up with SST numbers. This
would lead to a good bit of activity with heating by itself but the
weak inverted boundary and sfc low will help this a bit, especially
since they are over the area today causing a better focus. This was
farther north yesterday. These features will continue to weaken but
will still hang in enough to help get things going again Friday.
Went more deterministic with precip percentages for today since
these features are over the area. But may back these down gently for
Friday and possibly again Saturday.
.LONG TERM (Sunday and Beyond)...
An easterly to southeasterly flow pattern will be in place early
next week, which will help to reintroduce more moisture into the
area. This is shown in model soundings with PWATs jumping back to
around or above 2" and a rise in low and mid-level RH values.
Although there is no obvious feature aloft or in the mid levels that
would aid convection, a lack of any ridging will allow for higher
PoPs which range from 70-75% through mid-week. Did make a slight
adjustment down in PoPs, about 5% or so, as the NBM seems to still
be running on the high side. Any showers or thunderstorms that do
develop will likely be on sea or lake breeze boundaries as well as
any lingering outflows from previous storms. Temperatures are
expected to remain consistent in the mid to upper 80s through the
week.
HL
&&
.AVIATION...(12z)
IFR and LIFR conditions will again plague the area today with sh/ts
affecting all terminals, and again at different times. Some vis
restrictions and low cigs may result overnight tonight for terminals
well inland but most coastal locations should retain VFR outside
TSRA.
&&
MARINE... Thunderstorms will continue to form over the nearshore
waters over the next several days mainly during the late night into
mid morning hours. Winds and seas will remain in a light southerly
flow of 5 to 10 knots and seas of 2 feet or less. The main concern
from any thunderstorms will be brief periods of gusty winds, heavy
rainfall, and the potential for a few waterspouts.
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 82 71 84 69 / 100 40 90 30
BTR 87 74 87 73 / 100 40 90 20
ASD 87 73 87 73 / 100 50 90 30
MSY 86 76 86 75 / 100 60 90 40
GPT 85 74 86 74 / 100 70 90 40
PQL 84 73 86 72 / 100 70 90 50
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Flood Watch through this evening for LAZ034>037-039-047-048-071-
076-079>084.
GM...None.
MS...Flood Watch through this evening for MSZ068>071-077-080>082.
GM...None.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1140 AM CDT THU AUG 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1130 AM FLASH FLOOD GAUTIER 30.39N 88.64W
08/25/2022 JACKSON MS BROADCAST MEDIA
MEDIA RELAYED IMAGE OF WATER ESTIMATED TO BE
ABOUT A FOOT DEEP ON THE SHAMROCK CT.
&&
JZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1213 PM CDT THU AUG 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1200 PM FLASH FLOOD 2 N GAUTIER 30.41N 88.64W
08/25/2022 JACKSON MS BROADCAST MEDIA
STANDING WATER APPROXIMATELY 1.5 FT DEEP IN
PORTIONS OF WESTGATE ESTATES IN GAUTIER.
RELAYED VIA SOCIAL MEDIA.
&&
DMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1238 PM CDT THU AUG 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1238 PM FLASH FLOOD LYMAN 30.50N 89.14W
08/25/2022 HARRISON MS PUBLIC
PUBLIC REPORT OF FLOODING AT THE
INTERSECTION OF HWY 53 AND CANAL RD.
&&
DMSpecial Weather Statement
National Weather Service New Orleans LA
1245 PM CDT Thu Aug 25 2022
MSZ081-082-251815-
Jackson MS-Harrison MS-
1245 PM CDT Thu Aug 25 2022
...A strong thunderstorm will impact portions of east central
Harrison and western Jackson Counties through 115 PM CDT...
At 1244 PM CDT, Doppler radar was tracking a strong thunderstorm over
Biloxi, moving northeast at 25 mph.
HAZARD...Winds in excess of 30 mph and heavy rainfall.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down small tree branches and blow
around unsecured objects.
Locations impacted include...
Gulfport, Biloxi, Ocean Springs, St. Martin, D'iberville, Latimer,
Gulf Hills, Vancleave, Hickory Hills and Gulf Park Estates.
This includes the following Interstates...
Interstate 10 in Mississippi between mile markers 38 and 65.
Interstate 110 in Mississippi near mile marker 1, and between mile
markers 3 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is occurring with this storm and may lead to new
flooding or worsening of ongoing flooding. Do not drive your vehicle
through flooded roadways.
&&
LAT...LON 3044 8859 3036 8883 3038 8885 3039 8879
3041 8884 3043 8885 3042 8889 3043 8893
3042 8901 3041 8899 3042 8890 3040 8886
3038 8901 3048 8907 3068 8874
TIME...MOT...LOC 1744Z 241DEG 21KT 3043 8894
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
95/DMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
120 PM CDT THU AUG 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0110 PM FLASH FLOOD 1 ENE LYMAN 30.51N 89.11W
08/25/2022 HARRISON MS DEPT OF HIGHWAYS
MSDOT REPORTS FLOODING ALONG HWY 49 BETWEEN
HWY 53 AND SCHOOL RD WITH THE LEFT LANE OF
NORTHBOUND TRAFFIC BLOCKED.
&&
DMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
123 PM CDT THU AUG 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0123 PM FLASH FLOOD 1 SW GAUTIER 30.38N 88.65W
08/25/2022 JACKSON MS BROADCAST MEDIA
STANDING WATER APPROXIMATELY 1 FT DEEP ALONG
CALLE DE FELIZ IN GAUTIER. RELAYED VIA
SOCIAL MEDIA.
&&
DMThe Mobile radar (KMOB), 52 km away, was scanning. The volume nearest the first event began at 18:24 UTC.
4 flash flood. Local standard time, as filed.
Broadcast media relayed a picture of water approximately one foot deep on Calle De Feliz street in Gautier.
Heavy rainfall resulted in water flowing over Old Spanish Trail near the railroad crossing just east of West Lane.
Broadcast media relayed pictures of water up to two feet from heavy rainfall over Baywood Drive.
Broadcast media shared a video on social media showing up to 2 feet of water near the Coliseum in Biloxi.
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: 1055224, 1055233, 1055234, 1055236.