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BULLETIN
Tropical Storm Beta Advisory Number  18
NWS National Hurricane Center Miami FL       AL222020
1000 PM CDT Mon Sep 21 2020
 
...CENTER OF BETA NEARING THE TEXAS COAST...
...HEAVY RAINS OCCURRING OVER THE CENTRAL TEXAS COASTAL AREA...
 
 
SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...28.4N 96.3W
ABOUT 5 MI...10 KM E OF PORT OCONNOR TEXAS
ABOUT 25 MI...35 KM SW OF MATAGORDA TEXAS
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...NW OR 325 DEGREES AT 3 MPH...6 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 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 Aransas, Texas to Sabine Pass, Texas including Copano Bay,
Aransas Bay, San Antonio Bay, Matagorda Bay, and Galveston Bay.
 
A Tropical Storm Warning is in effect for...
* Port Aransas Texas to Morgan City Louisiana
 
A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline,
during the next 36 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 Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
 
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 28.4 North, longitude 96.3 West. Beta is
moving toward the northwest near 3 mph (6 km/h), and this general 
motion is forecast to continue tonight.  A slow north and northeast 
motion are expected on Tuesday, and a faster east-northeastward 
motion should begin Tuesday night and continue Wednesday.  On the 
forecast track, the center of Beta will move inland overnight.  
Beta is forecast to remain near or just offshore the coast of 
southeastern Texas on Tuesday and Wednesday.
 
Data from an Air Force Reserve reconnaissance aircraft indicate that 
the maximum sustained winds are near 45 mph (75 km/h) with higher 
gusts. Little change in strength is forecast before Beta reaches the
Texas coast. Weakening is anticipated on Tuesday as Beta moves just 
inland along the Texas coast. 
 
Tropical-storm-force winds extend outward up to 125 miles (205 km)
from the center. A WeatherFlow observing site at Matagorda Bay, 
Texas, has reported sustained winds of 41 mph (67 km/h) with a gust 
to 53 mph (85 km/h) this evening.
 
The estimated minimum central pressure is 999 mb (29.50 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Beta can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2 and WMO header WTNT42 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 Aransas, TX to Sabine Pass, TX including Copano Bay, Aransas
Bay, San Antonio Bay, Matagorda Bay, and Galveston Bay...2-4 ft
Sabine Pass, TX to Ocean Springs, MS including Sabine Lake, Lake
Calcasieu, Vermilion Bay, Lake Borgne, Lake Pontchartrain, and Lake
Maurepas...1-3 ft
Baffin Bay, TX to Port Aransas, TX including Corpus Christi Bay and
Baffin Bay... 1-3 ft
Mouth of the Rio Grande to Baffin Bay, TX...1-2 ft
 
The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
dangerous 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:  Tropical storm conditions are expected to continue within
portions of the tropical storm warning area through Tuesday.
 
RAINFALL: Through Friday, Beta is expected to produce rainfall 
accumulations of 5 to 10 inches with isolated totals of 15 inches 
from the middle Texas coast to southeast Louisiana. Rainfall totals 
of 3 to 5 inches are expected northward into the ArkLaTex region and 
east into the Lower Mississippi Valley through the end of the week. 
Flash and urban flooding is likely, as well as isolated minor river 
flooding.
 
TORNADOES:  A tornado or two could occur through Tuesday near the
middle to upper Texas coast or the southwestern Louisiana coast.
 
SURF:  Swells generated by a combination of Beta and a cold front
over the northern Gulf of Mexico will continue along the coasts of
Louisiana and Texas 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.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 100 AM CDT.
Next complete advisory at 400 AM CDT.
 
$$
Forecaster Brown
 
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