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BULLETIN
Hurricane Grace Advisory Number  32
NWS National Hurricane Center Miami FL       AL072021
400 AM CDT Sat Aug 21 2021
 
...GRACE MOVING WESTWARD OVER EASTERN MEXICO...
...STRONG WINDS AND HEAVY RAINFALL WILL SPREAD ACROSS
PORTIONS OF INTERIOR MEXICO TODAY...
 
 
SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...20.5N 97.8W
ABOUT 45 MI...70 KM SW OF TUXPAN MEXICO
ABOUT 135 MI...220 KM NW OF VERACRUZ MEXICO
MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H
PRESENT MOVEMENT...W OR 260 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...970 MB...28.64 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Hurricane Warning is in effect for...
* The coast of mainland Mexico from Puerto Veracruz to Cabo Rojo
 
A Tropical Storm Warning is in effect for...
* The coast of mainland Mexico from north of Cabo Rojo to Barra del
Tordo
 
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere withing the warning area.
 
For storm information specific to your area, please monitor
products issued by your national meteorological service.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 400 AM CDT (0900 UTC), the center of Hurricane Grace was located
near latitude 20.5 North, longitude 97.8 West. Grace is moving
toward the west near 14 mph (22 km/h), and this general motion is
expected to continue through tonight. On the forecast track, Grace
will continue to move farther inland and reach central Mexico later
today.
 
Maximum sustained winds have decreased to near 110 mph (175 km/h) 
with higher gusts. Rapid weakening is expected as Grace moves 
inland over the mountains of central Mexico today, and the hurricane 
is forecast to weaken to a tropical storm by this afternoon, and 
then dissipate on Sunday.
 
Hurricane-force winds extend outward up to 30 miles (45 km) from the
center and tropical-storm-force winds extend outward up to 150 miles
(240 km).
 
The estimated minimum central pressure is 970 mb (28.64 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Grace can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and
on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages.
 
STORM SURGE: A dangerous storm surge will raise water levels by as 
much as 6 to 9 ft above normal tide levels in areas of onshore flow 
during the next few hours near where Grace made landfall. Near the 
coast, the surge will be accompanied by large and destructive waves.
 
WIND: Hurricane conditions are expected to continue within portions
of the hurricane warning area in mainland Mexico over the next few
hours. Tropical storm conditions are expected to continue within
the tropical storm warning area in mainland Mexico through this
morning.
 
RAINFALL: Grace is expected to produce the following rainfall
amounts:
 
Over Veracruz, Puebla, Tlaxcala, Hidalgo, Queretaro, and eastern San
Luis Potosi...6 to 12 inches of rain with isolated maximum totals
of 18 inches are expected through Sunday. Heavy rainfall from
Grace will result in significant flash and urban flooding as well
as mudslides.
 
SURF: High surf generated by Grace will affect the southern Gulf of
Mexico coastline through the weekend. 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 700 AM CDT.
Next complete advisory at 1000 AM CDT.
 
$$
Forecaster Latto
 
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