Flash Flood Warning 12, NWS Charleston, SC

692 
WGUS72 KCHS 261901
FFSCHS

Flash Flood Statement
National Weather Service Charleston SC
301 PM EDT Sun Jul 26 2026

SCC015-019-035-262100-
/O.CON.KCHS.FF.W.0012.000000T0000Z-260726T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berkeley SC-Charleston SC-Dorchester SC-
301 PM EDT Sun Jul 26 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON FOR BERKELEY, CHARLESTON AND DORCHESTER COUNTIES...

At 301 PM EDT, Doppler radar indicated thunderstorms with torrential
rainfall extending from Summerville to the Charleston International
Airport. As much as 1 to 2 inches of rain have fallen in areas from
Summerville to the Northwoods Mall with as much as 2 to 4 inches over
parts of North Charleston inside I-526 to near Daniel Island. The
risk for flash flooding continues.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

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...
  North Charleston, Mount Pleasant, Summerville, Goose Creek,
  Hanahan, Naval Weapons Station Charleston, I-26/I-526 Interchange,
  Ladson, Daniel Island and West Ashley.

This includes the following highways...
I-26 between mile markers 198 and 221. I-526 between mile markers 16
and 28.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown whAs much as 2 inches of rain has fallen en
encountering flooded roads. Most flood deaths occur in vehicles.

Report flooding directly to the Charleston National Weather Service
at 1-888-383-2024 or email your reports to nws.charlestonsc@noaa.gov.

&&

LAT...LON 3305 8019 3311 8011 3290 7982 3287 7985
      3282 7991 3278 7992 3301 8024

FLASH FLOOD...RADAR INDICATED

$$

ST

865 
WGUS72 KCHS 262036
FFSCHS

Flash Flood Statement
National Weather Service Charleston SC
436 PM EDT Sun Jul 26 2026

SCC015-019-035-262046-
/O.CAN.KCHS.FF.W.0012.000000T0000Z-260726T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berkeley SC-Charleston SC-Dorchester SC-
436 PM EDT Sun Jul 26 2026

...FLASH FLOOD WARNING IS CANCELLED FOR BERKELEY, CHARLESTON AND
DORCHESTER COUNTIES...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 1000 PM EDT.

&&

LAT...LON 3305 8019 3311 8011 3290 7982 3287 7985
      3282 7991 3278 7992 3301 8024

$$

ST

Area Forecast Discussion
National Weather Service Charleston SC
1202 PM EDT Sun Jul 26 2026

.WHAT HAS CHANGED...
A Flash Flood Watch has been issued for portions of the
Charleston Quad-County area. Key Message 1 has been updated.

&&

.KEY MESSAGES...
- 1) Locally heavy rainfall is possible today as a stalled
  front remains in the vicinity of the South Carolina
  Lowcountry.

- 2) Hot and humid conditions return to the South Carolina
  Lowcountry and Southeast Georgia during the middle of this
  week.

&&

.DISCUSSION...
KEY MESSAGE 1: Locally heavy rainfall is possible today as a
stalled front remains in the vicinity of the South Carolina
Lowcountry.

At the surface, a stalled front remains draped across portions of
the South Carolina Lowcountry today, oriented from the Charleston
county coastline through Summerville and up towards Columbia, SC.
Aloft, a h500 trough continues to slowly deepen along the east coast
as weak shortwaves move through the northwesterly flow. Moisture
remains plentiful across the southeast region, with PWATs remaining
above 2.0" through today while pockets of values to near 2.5" are
expected. The 12Z CHS observed sounding showed a long and skinny
CAPE profile with a PWAT of 2.17", just above the 90th percentile of
climatology for the date, with MLCAPE of near 1900 J/kg. Forecast
soundings continue to show long and skinny profiles throughout the
day, with peak MLCAPE values of 2000-3000 J/kg by early this
afternoon.

Throughout the rest of the afternoon hours, expect the ongoing
convection across the Charleston quad-county region to continue
developing along the aforementioned front, further aided by the
shortwaves aloft and an expected afternoon sea-breeze. As a result,
locally heavy rainfall will remain possible this afternoon into the
evening. Guidance continues to hint that a weak low pressure may
form along the front, which would further increase the convergence
of moisture, further increasing the heavy rainfall threat. While the
latest 12Z HREF rainfall accumulation probabilities have decreased
slightly, with 50-70% chances for 1"/3hr and 10-30% for 3"/3hrs, the
longer duration of rainfall chances today will keep flooding chances
elevated this afternoon, especially for the Charleston quad-county.
Have therefore issued a Flash Flood Watch for the Charleston quad-
county region, with the risk for locally heavy rainfall decreasing
into southeast Georgia.

In addition to the heavy rainfall threat, steep low-level lapse
rates with the high PWATs may enhance downdraft strength, bringing a
risk for strong damaging wind gusts of 50 to 60 mph.

KEY MESSAGE 2: Hot and humid conditions return to the South
Carolina Lowcountry and Southeast Georgia during the middle of
this week.

The mid-levels will consist of a very strong ridge over the Rockies
and Plains early to mid week. Meanwhile, troughing will be
along the Eastern Seaboard. We'll generally be on the eastern
periphery of the ridge, with NNW flow overhead. At the surface,
weak high pressure will prevail over or nearby early to mid next
week. Hot and humid conditions are expected to return during
the middle of the week. Tuesday and Wednesday look to be the
hottest days of the week, with highs in the mid to upper 90s,
with some spots possibly reaching the 100 degree mark across far
inland GA. Even temperatures at the coast will be in the 90s.
Dewpoints are expected to be in the low 70s far inland, but pool
into the mid to upper 70s at the coast with the afternoon sea
breeze. This will equate to heat indices in the 100-105 degree
range inland, and the 108-112 degree range for our coastal
counties on Tuesday. Though, the range could increase to 110-115
degrees for our coastal counties on Wednesday. If this pans
out, at least our coastal counties would need heat headlines
both days. The wild card would be afternoon convection. Tuesday
is looking fairly dry, but Wednesday may have scattered
convection, which would quickly lower temperatures. It could
also lead to strong to marginally severe storms. The heat and
humidity is expected to drop to near normal values on Thursday
with the arrival of a front.

&&

.AVIATION /12Z SUNDAY THROUGH THURSDAY/...
VFR to start the 12Z TAF period at KCHS/KJZI/KSAV. A stationary
front is located just to the north of Charleston and Berkeley
Counties as of 11Z. Restrictions are possible at KCHS/KJZI this
afternoon as showers and thunderstorms develop associated with
the stalled front. This threat is highlighted within a TEMPO
group at both terminals, while KSAV remains precip free at this
juncture.

Extended Aviation Outlook: Brief flight restrictions are possible
Wednesday and Thursday due to showers and thunderstorms.

&&

.MARINE...
Through Friday: A stationary front nearby will continue
southwesterly winds today. Winds and seas are forecast to
increase late Tuesday into Wednesday, so Small Craft Advisories
may be needed for most of our waters.

&&

.CLIMATE...
Record High Temperatures:

July 28:
KCHS: 101/1949
KCXM: 100/1936
KSAV: 102/1949

July 29:
KCHS: 100/1993
KCXM: 99/1999
KSAV: 103/1993

Record High Minimum Temperatures:

July 29:
KCHS: 80/2016
KCXM: 85/1999
KSAV: 82/1878

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...Flood Watch until 10 PM EDT this evening for SCZ043>045-149-
     150-152.
MARINE...None.

&&

Special Weather Statement
National Weather Service Charleston SC
104 PM EDT Sun Jul 26 2026

SCZ150-261730-
Charleston SC-
104 PM EDT Sun Jul 26 2026

...A STRONG THUNDERSTORM WILL IMPACT CHARLESTON COUNTY UNTIL 130 PM
EDT...

At 104 PM EDT, Doppler radar was tracking a strong thunderstorm over
Isle Of Palms, moving southeast at 30 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...
  Mount Pleasant, Daniel Island, Isle Of Palms, Sullivan's Island,
  Awendaw, Mount Pleasant Regional Airport, Boone Hall Plantation,
  Mount Pleasant Towne Centre, Capers Inlet and Sullivans Island.

This includes I-526 between mile markers 27 and 31.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Stay tuned to NOAA Weather Radio All Hazards, TV or your local news
source for the latest information from the National Weather Service.

Beaches are especially dangerous during thunderstorms because
lightning will usually strike the tallest object in the vicinity.
Move off beaches and get in a sturdy structure or automobile
immediately. Many people have been killed by lightning on beaches in
the southeastern United States.

&&

LAT...LON 3287 7959 3283 7966 3278 7969 3273 7983
      3278 7991 3282 7991 3283 7990 3286 7990
      3287 7988 3287 7986 3289 7984 3291 7984
      3294 7977 3296 7977 3296 7976 3297 7977
      3298 7976
TIME...MOT...LOC 1704Z 302DEG 23KT 3280 7975

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

SST

Preliminary Local Storm Report
National Weather Service Charleston SC
121 PM EDT Sun Jul 26 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0105 PM     Flash Flood      1 ESE Mount Pleasant    32.79N  79.85W
07/26/2026                   Charleston         SC   Trained Spotter

            Trained spotter reports rain/water going over a 2-3
            inch road verge into the sidewalk and into Santis
            Restaurant on center st and Ben Sawyer Blvd.

&&

Event Number CHS2600846

APT