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BULLETIN
Tropical Storm Nora Advisory Number  18
NWS National Hurricane Center Miami FL       EP142021
900 PM MDT Sun Aug 29 2021
 
...HEAVY RAIN FROM NORA WILL SPREAD NORTHWARD ACROSS NORTHWEST
MEXICO DURING THE NEXT COUPLE OF DAYS...
 
 
SUMMARY OF 900 PM MDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...24.8N 107.9W
ABOUT 95 MI...155 KM SE OF LOS MOCHIS MEXICO
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NNW OR 335 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
The government of Mexico has discontinued the Tropical Storm
Warning south of Bahia Tempehuaya and all of the Tropical Storm
Watch.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Bahia Tempehuaya to Topolobampo Mexico
 
A Tropical Storm Warning means that tropical storm conditions are
expected or occurring somewhere within the warning area.
 
Interests elsewhere along the coast of Sonora should monitor the
progress of Nora.
 
For storm information specific to your area, please monitor
products issued by your national meteorological service.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 900 PM MDT (0300 UTC), the center of Tropical Storm Nora was
located near the coast of Mexico at latitude 24.8 North, longitude
107.9 West. Nora is moving toward the north-northwest near 12 mph
(19 km/h). This general motion is expected to continue until Nora
dissipates inland in a day or so.
 
Maximum sustained winds have decreased to near 40 mph (65 km/h)
with higher gusts. Nora is forecast to weaken inland during the 
next day or so.
 
Tropical-storm-force winds extend outward up to 35 miles (55 km)
from the center.
 
The estimated minimum central pressure is 1002 mb (29.59 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:  Tropical storm conditions will continue in portions
of the Tropical Storm Warning area in mainland Mexico tonight.
 
RAINFALL:  Heavy rainfall is likely along the west coast of Mexico
from Nayarit to southern Sonora through late week as Nora lifts
northward through the Gulf of California. Rainfall of 8 to 12 inches
with maximum amounts of 20 inches is possible. This rainfall will
produce life-threatening flash flooding and mudslides.
 
Rainfall of 2 to 4 inches with maximum amounts of 6 inches is
possible in Baja California Sur and northern Sonora.
 
Toward the middle and latter part of the week, moisture associated
with Nora is likely to bring heavy rainfall and the potential for
scattered flash flooding to portions of the southwestern U.S. and
central Rockies.
 
SURF:  Swells generated by Nora are affecting the southwestern coast
of Mexico and will spread northward into the Gulf of California
through Monday.  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 1200 AM MDT.
Next complete advisory at 300 AM MDT.
 
$$
Forecaster D. Zelinsky
 
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