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Hurricane Hanna Advisory Number 11
NWS National Hurricane Center Miami FL AL082020
1000 AM CDT Sat Jul 25 2020
...HANNA CONTINUING TO STRENGTHEN AS IT CRAWLS CLOSER TO THE SOUTH
...GUSTY SQUALLS OCCURRING ALONG THE CENTRAL TEXAS COAST...
SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION
ABOUT 75 MI...120 KM ENE OF PORT MANSFIELD TEXAS
ABOUT 85 MI...135 KM SE OF CORPUS CHRISTI TEXAS
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...978 MB...28.88 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
The Tropical Storm Warning has been discontinued north of Sargent,
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for...
* Port Mansfield to Sargent Texas
A Hurricane Warning is in effect for...
* Port Mansfield to Mesquite Bay Texas
A Tropical Storm Warning is in effect for...
* Barra el Mezquital Mexico to Port Mansfield Texas
* Mesquite Bay to Sargent Texas
A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline,
during the next 24 hours in the indicated locations. For a depiction
of areas at risk, please see the National Weather Service Storm
Surge Watch/Warning Graphic, available at hurricanes.gov. This is a
life-threatening situation. Persons located within these areas
should take all necessary actions to protect life and property from
rising water and the potential for other dangerous conditions.
Promptly follow evacuation and other instructions from local
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next 12
hours. Preparations to protect life and property should be rushed
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within
the next 12 hours.
Interests elsewhere along the Texas and Louisiana coasts should
monitor the progress of Hanna. Interests in northeastern Mexico
should also monitor the progress of this hurricane.
For storm information specific to your area, including possible
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 the eye of Hurricane Hanna
was located by reconnaissance aircraft and NOAA Doppler weather
radars near latitude 27.1 North, longitude 96.3 West. Hanna is
moving toward the west near 7 mph (11 km/h), and this motion should
continue through this morning. A gradual turn toward the
west-southwest is expected by late afternoon and tonight, and that
motion should continue through Sunday. On the forecast track, the
center of Hanna should make landfall along the Texas coast within
the hurricane warning area by late afternoon or early this evening.
Data from the NOAA Hurricane Hunter aircraft and Doppler weather
radars indicate that maximum sustained winds have increased to near
80 mph (130 km/h) with higher gusts. Some further strengthening is
possible before Hanna makes landfall later today. Rapid weakening is
expected after Hanna moves inland.
Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 90 miles
Reports from the NOAA Hurricane Hunter aircraft indicate that the
minimum central pressure is 978 mb (28.88 inches).
HAZARDS AFFECTING LAND
Key messages for Hanna can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and
on the web at www.hurricanes.gov/text/MIATCDAT3.shtml.
STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the 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...
Baffin Bay to Mesquite Bay including Corpus Christi Bay, Copano Bay,
and Aransas Bay...3-5 ft
Port Mansfield to Baffin Bay...2-4 ft
Mesquite Bay to Sargent including San Antonio Bay and Matagorda
Mouth of the Rio Grande to Port Mansfield...1-3 ft
North of Sargent to High Island including Galveston Bay...1-2 ft
The deepest water will occur along the immediate coast near and to
the right of the landfall location. 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.
WIND: Hurricane conditions are expected in the warning area
this afternoon. Tropical storm conditions are occuring in
portions of the warning area and will spread inland through the
afternoon and evening.
RAINFALL: Hanna is expected to produce 6 to 12 inches of rain with
isolated maximum totals of 18 inches through Sunday night in south
Texas and into the Mexican states of Coahuila, Nuevo Leon, and
northern Tamaulipas. This rain may result in life-threatening flash
flooding, rapid rises on small streams, and isolated minor to
moderate river flooding in south Texas.
3 to 5 inches of rain is expected along the upper Texas and
SURF: Swells generated by Hanna are expected to increase and affect
much of the Texas and Louisiana coasts during the next couple of
days. These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
TORNADOES: A few tornadoes are possible today and overnight over
parts of the lower to middle Texas coastal plain.
Next intermediate advisory at 100 PM CDT.
Next complete advisory at 400 PM CDT.