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Tropical Storm Grace Intermediate Advisory Number 33A
NWS National Hurricane Center Miami FL AL072021
100 PM CDT Sat Aug 21 2021
...GRACE CONTINUES WEAKENING RAPIDLY OVER LAND BUT STILL CAUSING
VERY HEAVY RAINS AND FLOODING OVER PORTIONS OF EAST-CENTRAL
SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION
ABOUT 35 MI...55 KM NW of CIUDAD DE MEXICO
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...WSW OR 250 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* The coast of mainland Mexico from Puerto Veracruz to Barra del
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 100 PM CDT (1800 UTC), the center of Tropical Storm Grace was
located near latitude 19.7 North, longitude 99.5 West. Grace is
moving toward the west near 13 mph (20 km/h) and a generally
westward motion is expected into early Sunday. On the forecast
track, the center will move over central and west-central
Mexico through tonight.
Maximum sustained winds have decreased to near 45 mph (75 km/h)
with higher gusts. Continued rapid weakening is expected while the
system moves over the mountains of central and west-central Mexico
today and tonight, and Grace is forecast to weaken to a tropical
depression later today and dissipate by early Sunday.
Tropical-storm-force winds extend outward up to 150 miles (240 km)
from the center.
The estimated minimum central pressure is 998 mb (29.47 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: Storm surge flooding should continue to subside along
the coast of Mexico.
WIND: Tropical storm conditions are expected to continue over
portions of the tropical storm warning area along the coast of
Mexico for the next few hours.
RAINFALL: Grace is expected to produce the following rainfall
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. Over Ciudad de Mexico, 1
to 3 inches with isolated maximum totals of 5 inches. 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 complete advisory at 400 PM CDT.