Hurricane Hanna Key Messages
Hurricane Hanna Flash Flood Outlook

Hurricane Hanna Forecast

INITIAL ADVISORY 7:00 AM

BULLETIN
Hurricane Hanna Intermediate Advisory Number 10A
NWS National Hurricane Center Miami FL       AL082020
700 AM CDT Sat Jul 25 2020
 
...NOAA HURRICANE HUNTERS AND DOPPLER WEATHER RADARS FIND HANNA HAS
BECOME THE FIRST HURRICANE OF THE 2020 ATLANTIC HURRICANE SEASON...
 
 
SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...27.1N 96.0W
ABOUT 90 MI...150 KM ENE OF PORT MANSFIELD TEXAS
ABOUT 100 MI...160 KM ESE OF CORPUS CHRISTI TEXAS
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...982 MB...29.00 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
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 High Island 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
officials.
 
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
to completion.
 
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 system.
 
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 700 AM CDT (1200 UTC), the center of Hurricane Hanna was located
by reconnaissance aircraft and NOAA Doppler weather radars near
latitude 27.1 North, longitude 96.0 West.  Hanna is moving toward
the west near 9 mph (15 km/h), and this motion should continue
through this morning.  A gradual turn toward the west-southwest is
expected by 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 this
afternoon or early this evening.
 
Data from the reconnaissance aircraft and Doppler weather radars 
indicate that maximum sustained winds have increased to near 75 mph 
(120 km/h) with higher gusts.  Additional strengthening is forecast 
before Hanna makes landfall later today. Rapid weakening is 
expected after Hanna moves inland.
 
Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
 
Data from the NOAA Hurricane Hunter aircraft indicate that the
minimum central pressure is 982 mb (29.00 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Hanna can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC.
 
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...
 
Port Mansfield to Baffin Bay TX...2 to 4 ft
 
Baffin Bay to Sargent TX...including Corpus Christi Bay, Copano Bay,
Aransas Bay, San Antonio Bay, and Matagorda Bay...3 to 5 ft
 
Mouth of the Rio Grande to Port Mansfield TX...1 to 3 ft
 
North of Sargent to High Island TX...including Galveston Bay...1 to
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 expected to begin
in the warning area later this morning.
 
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
Louisiana coasts.
 
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
office.
 
TORNADOES: A few tornadoes are possible today and overnight over
parts of the lower to middle Texas coastal plain.

UPDATED ADVISORY 10:00 AM

BULLETIN
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
TEXAS COAST...
...GUSTY SQUALLS OCCURRING ALONG THE CENTRAL TEXAS COAST...
 
 
SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...27.1N 96.3W
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,
Texas.
 
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
officials.
 
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
to completion.
 
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
(150 km).
 
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 
Bay...2-4 ft

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
Louisiana coasts.
 
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
office.
 
TORNADOES: A few tornadoes are possible today and overnight over
parts of the lower to middle Texas coastal plain.