Alert archive / Mississippi / Flash Flood Warnings in 2026

Flash Flood Warning 3, NWS Mobile, AL

May 21, 2026Stone County, Mississippi

NWS Mobile, AL issued this flash flood warning at May 21, 2026, 6:02 PM CDT for Stone County, Mississippi. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 21, 2026, 6:02 PM CDT (23:02 UTC)
Expired
May 21, 2026, 8:00 PM CDT
In force
118 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Stone County, MS

The radar

The Mobile radar (KMOB), 97 km from the middle of the area, began a volume at 23:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.0 hours before the alert went out and 83 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2026-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1089 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2026-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1089 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

613 
WGUS54 KMOB 212302
FFWMOB
MSC131-220100-
/O.NEW.KMOB.FF.W.0003.260521T2302Z-260522T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
602 PM CDT Thu May 21 2026

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northwestern Stone County in southeastern Mississippi...

* Until 800 PM CDT.

* At 602 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Wiggins, Perkinston, Bond, Ten Mile, Texas and Big Level.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3074 8934 3091 8934 3091 8932 3091 8931
      3091 8930 3091 8929 3091 8928 3091 8927
      3091 8923 3091 8922 3091 8912 3091 8911
      3091 8909 3091 8905 3076 8905

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
744 
WGUS74 KMOB 220055
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
755 PM CDT Thu May 21 2026

MSC131-220105-
/O.EXP.KMOB.FF.W.0003.000000T0000Z-260522T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stone MS-
755 PM CDT Thu May 21 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR 
NORTHWESTERN STONE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3074 8934 3091 8934 3091 8932 3091 8931
      3091 8930 3091 8929 3091 8928 3091 8927
      3091 8923 3091 8922 3091 8912 3091 8911
      3091 8909 3091 8905 3076 8905

$$

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this flash flood warning went out at May 21, 2:59 PM CDT, 3 hours 3 minutes earlier. Its key messages:

  • Issued at 256 PM CDT Thu May 21 2026
  • High rain chances will be in place through the weekend and into early next week, especially over the western half of the forecast area.
  • A conditional severe threat may materialize Friday morning. A brief tornado or two cannot be ruled out.
Area forecast discussion, May 21, 2:59 PM CDT, 3 hours 3 minutes before
Area Forecast Discussion
National Weather Service Mobile AL
259 PM CDT Thu May 21 2026

...New MARINE...

.KEY MESSAGES...
Issued at 256 PM CDT Thu May 21 2026

 - High rain chances will be in place through the weekend and into
   early next week, especially over the western half of the
   forecast area.

 - A conditional severe threat may materialize Friday morning. A
   brief tornado or two cannot be ruled out.

&&

.DISCUSSION...
Issued at 144 PM CDT Thu May 21 2026

A southwesterly flow pattern aloft is expected to continue
through the period as an active subtropical jet remains in place
along and west of our local area. Several shortwaves, embedded
within the subtropical jet, will quickly pass near/over the area
over the next several days. With the shortwaves moving overhead,
along with deep moisture in place (PWATs generally ranging around
1.7-2.0 inches) and strong destabilization occurring each day due
to diurnal heating, shower and thunderstorm development is
expected each day through the period. Highest rain chances look to
occur during the late morning/afternoon hours each day, and best
coverage looks to be over interior counties west of I-65 (due to
the closer proximity to the subtropical jet).

It should be noted that guidance has trended a bit higher on shear
values for late tonight and into tomorrow morning as a more stout
shortwave passes overhead and a 30-40kt LLJ develops. If storms are
able to fire by or a little after daybreak (when the best overlap of
the LLJ and instability looks to occur), there may be a brief, yet
conditional, window where severe storms may be possible. Storms that
are able to organize may be mini-spinny in nature due to weak storm
relative inflow, moist boundary-layer conditions, and curved low-
level hodographs, and therefore, cannot rule out a few brief spin-
ups generally between the 6AM-12PM timeframe. The LLJ should begin
to lift out of the area during the afternoon hours, helping to
reduce the tornado risk throughout the day.

Outside of tomorrow morning's potential, the potential for organized
severe weather lessens as shear profiles weaken. With limited shear,
storms will become more pulse-like in nature. That being said, as we
typically see with this type of pattern, cannot rule out a few
stronger storms capable of producing gusty downburst winds and small
hail, as well as frequent lightning. It should be noted that the
slow-moving nature of these storms, as well as the deep moisture in
place, may lead to storms being efficient rainfall producers. If a
few storms manage to train over the same areas, cannot rule out some
localized flooding concerns. Highs each day will generally be in the
mid to upper 80s. Lows will be very mild and humid, with
temperatures only dropping into the upper 60s to low 70s inland and
the low to mid 70s closer to the coast. A Moderate Risk of rip
currents will be in place through the remainder of the week and into
the weekend. /96

&&

.AVIATION...
(18Z TAFS)
Issued at 144 PM CDT Thu May 21 2026

Scattered to numerous showers and storms are expected mainly west of
I-65 through this afternoon before diminishing this evening.
Additional showers and storms are anticipated to spread into
southeast Mississippi and southwest Alabama late tonight and
continue developing further east Friday morning. IFR/MVFR conditions
and gusty winds will accompany the stronger storms. Otherwise,
predominately VFR conditions outside of the convection lower to
IFR/MVFR overnight then improve somewhat to MVFR Friday morning.
Southeasterly winds 5-10 knots diminish to 5 knots or less this
evening, then a southerly flow near 10 knots develops Friday
morning. /29

&&

.MARINE...
Issued at 256 PM CDT Thu May 21 2026

Light to moderate southeasterly flow will prevail through this
weekend and into early next week. Seas will generally be 1 to 3
feet. No impacts are expected other than locally higher winds and
seas possible near thunderstorms. /96

&&

.PRELIMINARY POINT TEMPS/POPS...
Mobile      72  83  72  86 /  70  80  30  70
Pensacola   74  83  74  85 /  40  80  30  60
Destin      75  83  74  84 /  20  50  30  30
Evergreen   71  84  70  86 /  30  80  40  70
Waynesboro  70  82  69  86 /  60  90  60  80
Camden      69  82  70  85 /  50  90  40  70
Crestview   71  85  71  87 /  20  50  30  60

&&

.MOB WATCHES/WARNINGS/ADVISORIES...
AL...None.
FL...None.
MS...None.
GM...None.
&&

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 5:28 PM CDTAreal Flood AdvisoryMOBStone3 hr

Nearby

Flash Flood Warnings in Mississippi, 2026Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.