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Tropical Storm Nora Intermediate Advisory Number 8A
NWS National Hurricane Center Miami FL EP142021
100 PM CDT Fri Aug 27 2021
...RAINBANDS FROM NORA CONTINUE TO SPREAD ONSHORE THE COAST OF
...FLASH FLOODS AND MUDSLIDES POSSIBLE THOUGH THE WEEKEND...
SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION
ABOUT 240 MI...385 KM S OF MANZANILLO MEXICO
ABOUT 610 MI...980 KM SE OF CABO SAN LUCAS MEXICO
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Watch is in effect for...
* Lazaro Cardenas to Cabo Corrientes Mexico
A Tropical Storm Warning is in effect for...
* Tecpan de Galeana to San Blas Mexico
A Tropical Storm Watch is in effect for...
* North of San Blas to Mazatlan Mexico
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within the next 36 hours.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
Interests elsewhere along the northwestern coast of mainland Mexico
and southern portions of Baja California Sur should monitor the
progress of Nora. Additional watches and warnings will likely be
required for portions of these areas later today or tonight.
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 Nora was
located near latitude 15.7 North, longitude 104.6 West. Nora is
moving toward the northwest near 12 mph (19 km/h). A motion toward
the northwest or north-northwest is expected through Monday. On the
forecast track, the center of Nora will approach the southwestern
coast of Mexico today and tonight and pass very near the coasts of
the states of Colima, Jalisco, and Nayarit Saturday and Saturday
night. Nora will then approach and move into the Gulf of California
on Sunday and Monday.
Maximum sustained winds are near 50 mph (85 km/h) with higher
gusts. Strengthening is forecast during the next couple of days, and
Nora is expected to become a hurricane on Saturday.
Nora is a large tropical storm, and tropical-storm-force winds
extend outward up to 230 miles (370 km) from the center. A ship
near the coast of Mexico about 200 miles northeast of Nora's center
recently reported winds of 48 mph (78 km/h).
The estimated minimum central pressure is 997 mb (29.44 inches).
HAZARDS AFFECTING LAND
Key messages for Nora can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDEP4, WMO header WTPZ44 KNHC,
and on the web at hurricanes.gov/graphics_ep4.shtml?key_messages.
WIND: Hurricane conditions are possible within the hurricane watch
area on Saturday. Tropical storm conditions are likely occurring
over southern portions of the tropical storm warning area and will
spread to northern portions of the warning area through Saturday
evening. Tropical storm conditions are possible within the tropical
storm watch area Saturday night and Sunday.
RAINFALL: Heavy rain associated with Nora is expected across
coastal sections of the Mexican states of Oaxaca, Guerrero,
Michoacan, Colima, and Jalisco. Rainfall totals of 8 to 12 inches
are forecast through this weekend with isolated maximum amounts of
20 inches possible.
As Nora continues northwest, heavy rainfall will move into Baja
California Sur late Sunday into Monday. Rainfall totals of 4 to 8
inches are forecast, with isolated maximum amounts of 12 inches
Life-threatening flash flooding and mudslides may occur.
SURF: Swells generated by Nora are affecting the southern and
southwestern coast of Mexico and will spread northward to the coast
of Baja California Sur and into the Gulf of California over the
weekend into early next week. 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.