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BULLETIN
Tropical Storm Beta Advisory Number   6
NWS National Hurricane Center Miami FL       AL222020
1000 PM CDT Fri Sep 18 2020
 
...AIR FORCE RESERVE HURRICANE HUNTERS FIND BETA STRONGER...
...STORM SURGE AND HURRICANE WATCHES ISSUED FOR A PORTION OF THE
TEXAS COAST...
 
 
SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...25.5N 92.3W
ABOUT 305 MI...495 KM E OF MOUTH OF THE RIO GRANDE
ABOUT 315 MI...510 KM SW OF THE MOUTH OF THE MISSISSIPPI RIVER
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NNE OR 30 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...996 MB...29.42 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
A Storm Surge Watch has been issued from Port Mansfield, TX to High
Island, TX including Baffin Bay, Corpus Christi Bay, Copano Bay,
Aransas Bay, San Antonio Bay, Matagorda Bay, and Galveston Bay.
 
A Hurricane Watch has been issued from Port Aransas, TX to High
Island, TX.
 
A Tropical Storm Watch has been issued from south of Port Aransas
to the Mouth of the Rio Grande and east of High Island to Morgan
City LA.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Storm Surge Watch is in effect for...
* Port Mansfield, TX to High Island, TX including Baffin Bay, Corpus
Christi Bay, Copano Bay, Aransas Bay, San Antonio Bay, Matagorda
Bay, and Galveston Bay
 
A Hurricane Watch is in effect for...
* Port Aransas Texas to High Island Texas
 
A Tropical Storm Watch is in effect for...
* South of Port Aransas Texas to the Mouth of the Rio Grande
* East of High Island Texas to Morgan City Louisiana
 
A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.
For a depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
hurricanes.gov.
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area.  A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
dangerous.
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
 
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 PM CDT (0300 UTC), the center of Tropical Storm Beta was
located near latitude 25.5 North, longitude 92.3 West.  Beta is
moving toward the north-northeast near 12 mph (19 km/h).  A slow
westward motion is expected to begin late Saturday, with a slow
northwestward motion forecast to begin late Sunday and continue
through late Monday.  On the forecast track, the center of Beta
will slowly approach the Texas coast into early next week.
 
Data from the Air Force Hurricane Hunter aircraft indicate that
maximum sustained winds have increased to near 60 mph (95 km/h) with
higher gusts.  Additional strengthening is forecast, and Beta is
expected to become a hurricane on Sunday.
 
Tropical-storm-force winds extend outward up to 175 miles (280 km)
from the center.
 
The estimated minimum central pressure is 996 mb (29.42 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
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, TX to High Island, TX including Baffin Bay, Corpus
Christi Bay, Copano Bay, Aransas Bay, San Antonio Bay, Matagorda
Bay, and Galveston Bay...2-4 ft
Mouth of the Rio Grande to Port Mansfield, TX...1-3 ft
High Island, TX to Morgan City, LA including Sabine Lake, Calcasieu
Lake, and Vermilion Bay...1-3 ft
 
The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
destructive waves.  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 possible within the hurricane watch
area by late Monday or Monday night, with tropical storm conditions
possible by late Sunday.  Tropical storm conditions are possible
within the tropical storm watch area along the upper Texas and
southwestern Louisiana coast as early as late Saturday.  Tropical
storm conditions are possible within the tropical storm watch area
along the south Texas coast late Sunday.
 
RAINFALL:  There is an increasing risk of heavy rainfall and
flooding along the northwest Gulf Coast Sunday through at least the
middle of next week as Beta is forecast to move slowly toward and
along or offshore of the coast through that time. For additional
information, see products from your local National Weather Service
office.
 
SURF:  Swells are expected to increase and reach the coast of Texas
and the Gulf Coast of Mexico over the weekend, generated by a
combination of Beta and a cold front entering the northern Gulf of
Mexico.  These swells are likely to cause life-threatening surf and
rip current conditions.  Please consult products from your local
weather office.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 100 AM CDT.
Next complete advisory at 400 AM CDT.
 
$$
Forecaster Berg
 
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