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Tropical Storm Calvin Intermediate Advisory Number 31A
NWS Central Pacific Hurricane Center Honolulu HI   EP032023
200 AM HST Wed Jul 19 2023
 
...TROPICAL STORM CALVIN PASSING SOUTH OF THE BIG ISLAND...
...IMPACTS IN HAWAII COUNTY ARE IMMINENT OR OCCURRING...
 
 
SUMMARY OF 200 AM HST...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...17.7N 155.6W
ABOUT 160 MI...260 KM S OF HILO HAWAII
ABOUT 295 MI...475 KM SE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 20 MPH...31 KM/H
MINIMUM CENTRAL PRESSURE...1003 MB...29.62 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.
 
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 200 AM HST (1200 UTC), the center of Tropical Storm Calvin was
located near latitude 17.7 North, longitude 155.6 West. Calvin is
moving toward the west near 20 mph (31 km/h) and this motion is
expected to continue for the next few days.
 
Maximum sustained winds are near 50 mph (85 km/h) with higher
gusts. Some weakening is forecast during the next 48 hours.
 
Tropical-storm-force winds extend outward up to 140 miles (220 km)
from the center.
 
The estimated minimum central pressure is 1003 mb (29.62 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 imminent or occurring within
the warning area this morning. Seek shelter.
 
RAINFALL: Storm total rainfall amounts through Thursday are
forecasted to be 4-8 inches, with maximum amounts of 10 inches
possible, mainly along the windward slopes and southeast flank of
the Big Island of Hawaii. Storm total rainfall amounts of 3-6 inches
are expected on the windward areas of Maui, and 2-4 inches elsewhere
in the state. This rainfall could lead to localized flash flooding
and mudslides.
 
SURF: Swells generated by Calvin will affect all of the main 
Hawaiian Islands through today, generating life-threatening surf and 
sea conditions along exposed shorelines. 
  
NEXT ADVISORY
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Next complete advisory at 500 AM HST.
 
$$
Forecaster Powell
 
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