194
WTNT32 KNHC 211454
TCPAT2

BULLETIN
Tropical Storm Bertha Advisory Number 9
NWS National Hurricane Center Miami FL AL022026
1000 AM CDT Tue Jul 21 2026

...AIR FORCE HURRICANE HUNTERS FIND BERTHA HAS STRENGTHENED...
...TROPICAL STORM WATCHES AND WARNINGS REMAIN IN EFFECT FOR PORTIONS
OF THE NORTHERN GULF COAST...

SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION -----------------------------------------------
LOCATION...29.3N 86.3W
ABOUT 70 MI...115 KM SSW OF PANAMA CITY FLORIDA
ABOUT 145 MI...235 KM SE OF MOBILE ALABAMA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NNW OR 345 DEGREES AT 3 MPH...6 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.39 INCHES

WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

The Tropical Storm Watch has been upgraded to a Tropical Storm
Warning from the Florida/Alabama border eastward to the Bay/Gulf
County Line.

The Tropical Storm Warning has been extended westward to the Terrebonne/Lafourche Parish Line.

The Tropical Storm Watch has been extended westward from Morgan
City, Louisiana, to the Vermilion/Cameron Parish Line.

The Storm Surge Watch has been discontinued along the northern Gulf
Coast. A Coastal Flood Warning has been issued by the National
Weather Service for portions of the southeastern Louisiana and
Mississippi coastline.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
* Bay/Gulf County Line in Florida to the Terrebonne/Lafourche Parish
Line in Louisiana

A Tropical Storm Watch is in effect for...
* West of the Terrebonne/Lafourche Parish Line to the
Vermilion/Cameron Parish Line
* Metropolitan New Orleans, Lake Pontchartrain, and Lake Maurepas

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, in this case in the next 24 to 48 hours.

For storm information specific to your area, including other
coastal and inland watches and warnings, please monitor products
issued by your local National Weather Service forecast office.

DISCUSSION AND OUTLOOK
----------------------
At 1000 AM CDT (1500 UTC), the center of Tropical Storm Bertha was
located near latitude 29.3 North, longitude 86.3 West. Bertha is
moving toward the north-northwest near 3 mph (6 km/h) but is
expected to turn toward the west-northwest and west later today and
tonight. Then, a continued westward motion is forecast through the
middle of the week. On the forecast track, Bertha will move near or
along the northern Gulf Coast during the next several days.

Data from the Air Force Hurricane Hunters indicate that maximum
sustained winds have increased to near 60 mph (95 km/h) with higher
gusts. Little change in strength is expected today, followed by
gradual weakening through the middle of this week.

Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center. NOAA buoy 42039 south-southeast of Pensacola
recently reported sustained winds of 49 mph (79 km/h) and a gust of
54 mph (86 km/h).

The estimated minimum central pressure based on aircraft data is
995 mb (29.39 inches).

HAZARDS AFFECTING LAND
----------------------
Key messages for Tropical Storm Bertha can be found in the Tropical
Cyclone Discussion under AWIPS header MIATCDAT2 and WMO header
WTNT42 KNHC.

WIND: Tropical storm conditions are expected within the warning
area along the northern Gulf coast by late today into Wednesday.
Tropical storm conditions are possible within the watch area in
Louisiana by Wednesday.

STORM SURGE: The combination of storm surge and the tide will
cause normally dry areas near the immediate coast to be flooded by
rising waters moving inland from the shoreline. The water could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...

Mouth of the Mississippi River, LA to MS/AL Border...2-4 ft
Indian Pass, FL to Aucilla River, FL...1-3 ft
MS/AL Border to AL/FL Border...1-3 ft
Lake Pontchartrain...1-3 ft
Vermilion/Cameron Parish Line, LA to Mouth of the Mississippi River,
LA...1-3 ft

The deepest water will occur along the immediate coast.
Surge-related flooding depends on the relative timing of the surge
and the tidal cycle, and can vary greatly over short distances. For
information specific to your area, please see products issued by
your local National Weather Service forecast office.

For a complete depiction of areas at risk of storm surge inundation,
please see the National Weather Service Peak Storm Surge Graphic,
available at hurricanes.gov/graphics_at2.shtml?peakSurge.

RAINFALL: Bertha is expected to produce total rainfall amounts of 2
to 4 inches with isolated higher totals around 6 inches through
Thursday along the central Gulf Coast from western Florida into
southern Louisiana. This rainfall may produce isolated flash
flooding, especially in urban areas.

For a complete depiction of forecast rainfall associated with
Bertha, please see the National Weather Service Storm Total Rainfall
Graphic available at hurricanes.gov/graphics_at2.shtml?rainqpf and
the Flash Flood Risk graphic at
hurricanes.gov/graphics_at2.shtml?ero.

SURF: Swells generated by Bertha are affecting portions of Florida
and will spread westward along the northern Gulf Coast during the
week. These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.

A depiction of rip current risk for the United States can be found
at: hurricanes.gov/graphics_at2.shtml?ripCurrents

NEXT ADVISORY
-------------
Next intermediate advisory at 100 PM CDT.
Next complete advisory at 400 PM CDT.

$$
Forecaster Reinhart

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