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BULLETIN
Tropical Storm Calvin Advisory Number  25
NWS Central Pacific Hurricane Center Honolulu HI   EP032023
1100 AM HST Mon Jul 17 2023
 
...HURRICANE HUNTERS FLYING INTO TROPICAL STORM CALVIN...
...TROPICAL STORM WATCH REMAINS IN EFFECT FOR HAWAII COUNTY...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...17.3N 143.3W
ABOUT 790 MI...1270 KM E OF HILO HAWAII
ABOUT 990 MI...1595 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Tropical Storm Watch is in effect for...
* Hawaii County
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, in the case with the next 36 to 48
hours.
 
Interests elsewhere in Hawaii should monitor the progress of
Calvin.
 
For storm information specific to your area, please monitor
products issued by the National Weather Service office in
Honolulu Hawaii.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM HST (2100 UTC), the center of Tropical Storm Calvin was
located near latitude 17.3 North, longitude 143.3 West. Calvin is
moving toward the west near 21 mph (33 km/h) and this motion is
expected to continue over the next several days. On the forecast 
track, Calvin is expected to approach the main Hawaiian Islands on 
Tuesday, with tropical storm conditions possible over some areas 
starting Tuesday night.
 
Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Calvin is forecast to gradually weaken during the next several days.
 
Tropical-storm-force winds extend outward up to 125 miles (205 km)
from the center.
 
The estimated minimum central pressure is 1000 mb (29.53 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Calvin can be found in the Tropical Cyclone
Discussion under AWIPS header TCPCP1 and WMO header WTPA31 PHFO.
and on the web at hurricanes.gov/text/hfotcdcp1.shtml
 
WIND: Tropical storm conditions are possible within the watch area
starting Tuesday.
 
RAINFALL: From Tuesday night into Thursday, storm total rainfall
amounts of 4-8 inches are possible along windward areas of the Big
Island of Hawaii, with lower amounts (1-4 inches) expected elsewhere
in the state.  This rainfall could lead to localized flash flooding
and mudslides.
 
SURF:  Swells generated by Calvin are expected to begin reaching the
main Hawaiian Islands during the next couple of days.  A rapid
increase in surf is expected Tuesday and Wednesday. This surf will
likely cause life-threatening surf along exposed east-facing shores.
Please consult products from your local weather office.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Kodama
 
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