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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 AM PDT Sat May 15 2021

For the eastern North Pacific...east of 140 degrees west longitude:

Tropical cyclone formation is not expected during the next 5 days.

Today marks the first day of the eastern North Pacific hurricane
season, which will run until November 30.  Long-term averages for
the number of named storms, hurricanes, and major hurricanes are
15, 8, and 4, respectively.

The list of names for 2021 is as follows:

Name           Pronunciation    Name            Pronunciation
-------------------------------------------------------------
Andres         ahn-DRASE        Marty           MAR-tee 
Blanca         BLAHN-kah        Nora            NOOR-ruh 
Carlos         KAR-loess        Olaf            OH-lahf        
Dolores        deh-LOOR-ess     Pamela          PAM-eh-luh
Enrique        ahn-REE-kay      Rick            rik       
Felicia        fa-LEE-sha       Sandra          SAN-druh
Guillermo      gee-YER-mo       Terry           TAIR-ree 
Hilda          HILL-duh         Vivian          VIH-vee-uhn
Ignacio        eeg-NAH-see-oh   Waldo           WAHL-doh
Jimena         he-MAY-na        Xina            ZEE-nah       
Kevin          KEH-vin          York            york        
Linda          LIHN-duh         Zelda           ZEL-dah

One tropical storm, Andres, already formed earlier this month. The 
next named storm that develops this season will be Blanca.

This product, the Tropical Weather Outlook, briefly describes
significant areas of disturbed weather and their potential for
tropical cyclone formation during the next five days.  The issuance
times of this product are 5 AM, 11 AM, 5 PM, and 11 PM PDT.  After
the change to standard time in November, the issuance times are 
4 AM, 10 AM, 4 PM, and 10 PM PST.

A Special Tropical Weather Outlook will be issued to provide
updates, as necessary, in between the regularly scheduled
issuances of the Tropical Weather Outlook.  Special Tropical
Weather Outlooks will be issued under the same WMO and AWIPS
headers as the regular Tropical Weather Outlooks.

A standard package of products, consisting of the tropical cyclone
public advisory, the forecast/advisory, the cyclone discussion,
and a wind speed probability product, is issued every six hours
for all ongoing tropical cyclones.  In addition, a special
advisory package may be issued at any time to advise of
significant unexpected changes or to modify watches or warnings.

NHC has the option to issue advisories, watches, and warnings for 
disturbances that are not yet a tropical cyclone, but which pose 
the threat of bringing tropical storm or hurricane conditions to 
land areas within 48 hours.  For these land-threatening "potential 
tropical cyclones", NHC will issue the full suite of advisory and 
watch/warning products that previously had been issued only for 
tropical cyclones.  Potential tropical cyclones will share the 
naming conventions currently in place for tropical depressions, 
being numbered from a single list (e.g., "One-E", "Two-E", 
"Three-E", etc.).  

The Tropical Cyclone Update is a brief statement to inform of
significant changes in a tropical cyclone, to post or cancel
watches or warnings, or to provide hourly position updates between
intermediate advisories when the storm center is easily followed
by radar.  The Tropical Cyclone Update is also used in lieu of 
or to precede the issuance of a special advisory package.  
Tropical Cyclone Updates, which can be issued at any time, can be 
found under WMO header WTPZ61-65 KNHC, and under AWIPS header 
MIATCUEP1-5.

All NHC text and graphical products are available on the web at 
https://www.hurricanes.gov.  More information on NHC text products 
can be found at https://www.hurricanes.govaboutnhcprod.shtml, 
while more information about NHC graphical products can be 
found at https://www.hurricanes.gov/aboutnhcgraphics.shtml.

You can also interact with NHC on Facebook at 
https://www.facebook.com/NWSNHC.  Notifications are available 
via Twitter when select NHC products are issued.  Information 
about our east Pacific Twitter feed is available at
https://www.hurricanes.gov/twitter.shtml.

$$
Forecaster Papin/Brown
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