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BULLETIN
Tropical Storm Calvin Advisory Number  27
NWS Central Pacific Hurricane Center Honolulu HI   EP032023
1100 PM HST Mon Jul 17 2023
 
...TROPICAL STORM CALVIN CONTINUES TO CHURN TOWARD THE BIG
ISLAND...
...TROPICAL STORM WARNINGS REMAIN IN EFFECT FOR HAWAII COUNTY...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...17.4N 147.5W
ABOUT 520 MI...840 KM ESE OF HILO HAWAII
ABOUT 730 MI...1175 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 22 MPH...35 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Tropical Storm Warning is in effect for...
* Hawaii County
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 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 PM HST (0900 UTC), the center of Tropical Storm Calvin was
located near latitude 17.4 North, longitude 147.5 West. Calvin is
moving toward the west near 22 mph (35 km/h), and this motion is
expected to continue over the next 3 to 4 days. On this forecast
track, tropical storm conditions are expected to start spreading
over Hawaii County starting Tuesday night.
 
Maximum sustained winds are near 45 mph (75 km/h) with higher gusts.
Calvin is forecast to gradually weaken during the next few days.
 
Tropical-storm-force winds extend outward up to 105 miles (165 km)
from the center.
 
The estimated minimum central pressure is 1002 mb (29.59 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Calvin can be found in the Tropical Cyclone
Discussion under AWIPS header TCDCP1 and WMO header WTPA41 PHFO.
and on the web at hurricanes.gov/text/HFOTCDCP1.shtml
 
WIND: Tropical storm conditions are expected within the warning area
starting Tuesday night.
 
RAINFALL: From Tuesday night into Thursday, storm total rainfall
amounts of 4-8 inches, with maximum amounts of 10 inches are
possible, mainly along the windward areas of the Big Island of
Hawaii. Storm total rainfall amounts of 1-4 inches are expected
elsewhere in the state. This rainfall could lead to localized flash
flooding and mudslides.
 
SURF: Swells generated by Calvin are expected to begin spreading
across the main Hawaiian Islands late Tuesday. A rapid increase in
surf is expected along east facing shorelines exposed to these
swells from Tuesday night into Wednesday. This elevated surf 
will likely cause life-threatening conditions along exposed 
shorelines. Please consult products from your local weather 
office for details.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Houston
 
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